U.S. patent application number 09/930680 was filed with the patent office on 2002-07-25 for tonneau cover end plate securing mechanism having a radial engaging surface.
Invention is credited to Schmeichel, Charles M., Schmeichel, Steven C..
Application Number | 20020096910 09/930680 |
Document ID | / |
Family ID | 22843554 |
Filed Date | 2002-07-25 |
United States Patent
Application |
20020096910 |
Kind Code |
A1 |
Schmeichel, Charles M. ; et
al. |
July 25, 2002 |
Tonneau cover end plate securing mechanism having a radial engaging
surface
Abstract
A tonneau cover apparatus for attaching a flexible cover about a
cargo box of a vehicle, preferably a pickup truck. The apparatus
preferably includes, a support frame removably attached about the
perimeter of a cargo box of the vehicle, an elongated end plate
attached to an end of the flexible cover and an end plate
engagement member attached to the support frame, preferably one on
each side of the support frame. The end plate is preferably
attached to an end of the flexible cover and is configured to
cooperatively engage and pivot with respect to the end plate
engagement member and into and out of a fixed stretching position
wherein the flexible cover can be correspondingly be tensed and
relaxed. The end plate engagement member preferably has a radial
receiving surface and the end plate has a radial engaging surface,
which engages the radial receiving surface when the end plate
pivots into the fixed stretching position.
Inventors: |
Schmeichel, Charles M.;
(Jamestown, ND) ; Schmeichel, Steven C.;
(Jamestown, ND) |
Correspondence
Address: |
MOORE & HANSEN
2900 WELLS FARGO CENTER
90 SOUTH SEVENTH STREET
MINNEAPOLIS
MN
55402
US
|
Family ID: |
22843554 |
Appl. No.: |
09/930680 |
Filed: |
August 14, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60225109 |
Aug 14, 2000 |
|
|
|
Current U.S.
Class: |
296/100.15 ;
160/375 |
Current CPC
Class: |
B62D 33/0273 20130101;
B60P 7/04 20130101; B60P 7/02 20130101; B60J 7/102 20130101; Y10S
135/907 20130101; B60J 7/104 20130101 |
Class at
Publication: |
296/100.15 ;
160/375 |
International
Class: |
B60P 007/04 |
Claims
What is claimed is:
1. A tonneau cover apparatus for removably attaching a flexible
cover about a perimeter of a cargo box and tailgate of a pickup
truck, the tonneau cover apparatus comprising: a support frame, the
support frame removably attached about the cargo box of the pickup
truck; an end plate engagement member, the end plate engagement
member being attached to the support frame, the end plate
engagement member configured to engage and receive a portion of the
end plate as the end plate is translated and pivoted into and out
of a fixed stretching position in which a tension is placed upon
the flexible cover; an end plate, the end plate being attached to
an end of a flexible cover, the end plate configured to
cooperatively engage and pivot with respect to the end plate
engagement member and into and out of the fixed stretching position
wherein the flexible cover can be correspondingly be tensed and
relaxed; the end plate having a radial engaging surface and the end
plate engagement member having a receiving surface which engages
the radial engaging surface when the end plate pivots into the
fixed stretching position.
2. The tonneau cover apparatus of claim 1, wherein the end plate
engagement member has a radial receiving surface which engages the
radial engaging surface when the end plate pivots into the fixed
stretching position.
3. The tonneau cover apparatus of claim 1, further including a
locking member, the locking member operatively connected to the end
plate rearward of the end plate engagement member when the end
plate is in the fixed stretching position; the locking member being
moveable between a first position and a second position, wherein
the locking member prevents the end plate from being disengaged
from the fixed stretching position when the locking member is in
the first position, and wherein the end plate can be disengaged
from the fixed stretching position when the locking member is in
the second position.
4. The tonneau cover apparatus of claim 3, wherein the perimeter of
the cargo box includes a forward end and two opposing sidewalls;
the support frame includes two opposing side rails, one of which is
secured to each of the respective opposing side walls; the tonneau
cover apparatus further including a second end plate engagement
member; each of the end plate engagement members being attached to
one of the two side rails attached to the two opposing side walls;
wherein the side rails each have an inwardly extending flange
portion and the locking member includes a finger portion, the
finger portion of the locking member being positioned below the
respective inwardly extending flange portion when the locking
member is in the first position such that the end plate cannot be
disengaged from the end plate engagement member, because the finger
portion is restrained by the inwardly extending flange, the finger
portion of the locking member being removed from the inwardly
extending flange portion when the locking member is moved from the
first position to the second position such that the end plate can
be disengaged from the end plate engagement member when the locking
member is in the second position.
5. The tonneau cover apparatus according to claim 4, wherein the
locking member includes an upper portion which is slidably retained
within the end plate, and the finger portion is spaced apart from
the upper portion and extends outwardly beyond the main body of the
upper portion.
6. The tonneau cover apparatus according to claim 5, wherein the
end plate includes a channel having a cross-sectional shape which
is smaller at the bottom and larger at the top so that it has a
generally "T" shaped configuration.
7. A tonneau cover apparatus for removably attaching a flexible
cover about a perimeter of a cargo box and tailgate of a pickup
truck, the tonneau cover apparatus comprising: a support frame, the
support frame removably attached about the cargo box of the pickup
truck; an end plate engagement member, the end plate engagement
member being attached to the support frame, the end plate
engagement member configured to engage and receive a portion of the
end plate as the end plate is translated and pivoted into and out
of a fixed stretching position in which a tension is placed upon
the flexible cover; an end plate, the end plate being attached to
an end of a flexible cover, the end plate configured to
cooperatively engage and pivot with respect to the end plate
engagement member and into and out of the fixed stretching position
wherein the flexible cover can be correspondingly be tensed and
relaxed; the end plate engagement member having a radial receiving
surface and the end plate having a radial engaging surface which
engages the radial receiving surface when the end plate pivots into
the fixed stretching position.
8. The tonneau cover apparatus of claim 7, further including a
locking member, the locking member operatively connected to the end
plate rearward of the end plate engagement member when the end
plate is in the fixed stretching position; the locking member being
moveable between a first position and a second position, wherein
the locking member prevents the end plate from being disengaged
from the fixed stretching position when the locking member is in
the first position, and wherein the end plate can be disengaged
from the fixed stretching position when the locking member is in
the second position.
9. The tonneau cover apparatus of claim 7, wherein the perimeter of
the cargo box includes a forward end and two opposing sidewalls;
the support frame includes two opposing side rails, one of which is
secured to each of the respective opposing side walls; the tonneau
cover apparatus further including a second end plate engagement
member; each of the end plate engagement members being attached to
one of the two side rails attached to the two opposing side walls;
wherein the side rails each have an inwardly extending flange
portion and the locking member includes a finger portion, the
finger portion of the locking member being positioned below the
respective inwardly extending flange portion when the locking
member is in the first position such that the end plate cannot be
disengaged from the end plate engagement member, because the finger
portion is restrained by the inwardly extending flange, the finger
portion of the locking member being removed from the inwardly
extending flange portion when the locking member is moved from the
first position to the second position such that the end plate can
be disengaged from the end plate engagement member when the locking
member is in the second position.
10. The tonneau cover apparatus according to claim 7, wherein the
locking member includes an upper portion which is slidably retained
within the end plate, and the finger portion is spaced apart from
the upper portion and extends outwardly beyond the main body of the
upper portion.
11. The tonneau cover apparatus according to claim 7, wherein the
end plate includes a channel having a cross-sectional shape which
is smaller at the bottom and larger at the top so that it has a
generally "T" shaped configuration.
12. A tonneau cover apparatus for removably attaching a flexible
cover about a top of a perimeter of a cargo box of a pickup truck,
the perimeter of the cargo box including a forward end, two
opposing sidewalls and a tailgate, the tailgate being positioned
rearward of the forward end and having an open position and a
closed position, the flexible cover having first and second ends,
the tonneau cover apparatus comprising: a support frame including
two opposing side rails and a pair of end plate engagement members,
one of which is secured to each of the respective opposing side
rails rearward of the forward end, the support frame being
removably attached to the cargo box of the pickup truck; an end
plate attached to the second end of the flexible cover, the end
plate configured to cooperatively engage and pivot with respect to
each of the respective end plate engagement members; wherein the
end plate engagement members cooperate to engage the end plate when
the first end of the flexible cover is operatively connected to the
support frame forward of the respective engagement members, such
that the end plate can pivot into and out of a fixed stretching
position wherein the flexible cover is stretched to place a tension
on the flexible cover; the end plate having a radial engaging
surface and each of the end plate engagement members having a
receiving surface which engages a portion of the radial engaging
surface when the end plate pivots into the fixed stretching
position; and a locking member, the locking member operatively
connected to the end plate rearward of the each of the end plate
engagement members when the end plate is in the fixed stretching
position and movable between a first position and a second position
when the end plate is in the fixed stretching position; wherein the
locking member prevents the end plate from being disengaged from
the fixed stretching position when the locking member is in the
first position, and wherein the end plate can be disengaged from
the fixed stretching position when the locking member is in the
second position.
13. The tonneau cover apparatus of claim 12, wherein the end plate
engagement members have radial receiving surfaces which engage
portions of the radial engaging surface when the end plate pivots
into the fixed stretching position.
14. The tonneau cover apparatus of claim 13, wherein the perimeter
of the cargo box includes a forward end and two opposing sidewalls;
the support frame includes two opposing side rails, one of which is
secured to each of the respective opposing side walls; the tonneau
cover apparatus further including a second end plate engagement
member; each of the end plate engagement members being attached to
one of the two side rails attached to the two opposing side walls;
wherein the side rails each have an inwardly extending flange
portion and the locking member includes a finger portion, the
finger portion of the locking member being positioned below the
respective inwardly extending flange portion when the locking
member is in the first position such that the end plate cannot be
disengaged from the end plate engagement member, because the finger
portion is restrained by the inwardly extending flange, the finger
portion of the locking member being removed from the inwardly
extending flange portion when the locking member is moved from the
first position to the second position such that the end plate can
be disengaged from the end plate engagement member when the locking
member is in the second position.
15. The tonneau cover apparatus according to claim 14, wherein the
locking member includes an upper portion which is slidably retained
within the end plate, and the finger portion is spaced apart from
the upper portion and extends outwardly beyond the main body of the
upper portion.
16. The tonneau cover apparatus according to claim 15, wherein the
end plate includes a channel having a cross-sectional shape which
is smaller at the bottom and larger at the top so that it has a
generally "T" shaped configuration.
Description
CROSS-REFERENCE TO OTHER APPLICATIONS
[0001] The present application claims priority to co-pending U.S.
Provisional Patent Application Serial No. 60/225,109 filed Aug. 14,
2000 and entitled TONNEAU COVER HAVING REAR BAR LOCK.
BACKGROUND OF THE INVENTION
[0002] The present invention relates to Tonneau Covers,
particularly Tonneau Covers including a flexible cover and an
apparatus for attaching the flexible cover to a cargo box of a pick
up truck; the apparatus includes a rear bar or end plate and end
plate engagement members cooperating to impart tension to the
flexible cover when the end plate pivots into or is positioned in a
closed position with respect to the end plate engagement members;
and, preferably a locking member or members preventing unauthorized
detachment of the end plate from the end plate engagement
members.
DESCRIPTION OF THE PRIOR ART
[0003] Numerous protective covers for preventing rain, debris and
wind from damaging or disrupting the contents of a pickup truck bed
are currently available. Generally, the covers are made of some
sort of fabric, often coated with a polymeric material, which is
detachably fastenable to a rigid frame so as to enclose and protect
a given area. The covering materials used are generally stretchable
to the extent that once they are in a position, they are pulled
taut and then attached to the frame by numerous methods such as
snaps, grommets, or hook-and-loop fasteners and stretcher bars.
[0004] The use of hook-and-loop type fasteners and stretcher bars
to fasten a cover to a frame structure forms the subject matter of
U.S. Pat. Nos. 5,076,338 ('338 patent) and 5,174,353 ('353 patent)
issued to Steven Schmeichel et al., the disclosures of which are
incorporated herein by reference.
[0005] In the Schmeichel et al. patents, an edge portion of a
covering fabric is attached to a generally L-shaped end plate or
stretcher bar. The end plate is provided with a peak or crest,
which pivotally contacts ends of the frame structure as the end
plate is rotated into a fixed, stretching position. As the end
plate rotates into the fixed, stretching position, an enlarged
ridge of the end plate is either captured by a spring loaded lock
element as depicted in a first embodiment, or engages and deflects
a biased pawl element as depicted in a second embodiment. After the
enlarged ridge passes the lock or pawl element, the lock or pawl
element springs back to it's undeflected state thereby maintaining
the end plate in the fixed, stretching position. In order to move
the end plate out of the fixed stretching position, the biasing
force of the lock or the pawl element must be overcome. In the
first embodiment, this biasing force may be overcome by the
movement of the enlarged ridge as the end plate is pivoted out of
the fixed stretching position. In the second embodiment, deflection
of the pawl is best accomplished by manipulating a release member
which projects from a portion of a latching member, or by opening
the tailgate and manually disengaging the pawl from the enlarged
ridge.
[0006] Although the Schmeichel patents teach a number of
significant improvements over the prior art, there are several
limitations of the prior art, which are addressed and improved upon
by the present invention.
[0007] One limitation of the first embodiment of the Schmeichel et
al. patents, as depicted, is that the L-shaped lock member, by
virtue of it's resilient nature, merely imparts a dynamic force,
which tends to maintain the end plate in the fixed stretching
position. This force, however, can be overcome by the action of the
enlarged ridge as it moves past the inclined portion of the
L-shaped lock. Thus, the L-shaped lock does not function as a lock
in a conventional sense.
[0008] A limitation of the second embodiment of the Schmeichel et
al. patents is in the location and construction of the lock
element. As depicted, the lock element comprises a pawl element,
which is attached to one end of an elongated leaf spring. The other
end of the leaf spring is attached to a connector, which in turn is
connected to a side rail of the support frame structure. While this
embodiment functions to lock the end plate and support frame
structure in the fixed stretching position, it would appear that
absent support, the pawl element may be forcibly disengaged and/or
damaged by forcible movement of the end plate out of the fixed,
stretching position.
[0009] Another limitation of the second embodiment of the
Schmeichel et al. patents is that the end plate may be disengaged
from the lock member by a person with knowledge of the location of
the release member.
[0010] A limitation common to both the first and second embodiments
of the Schmeichel et al. patents regards the attachment point and
the design of the engagement member (or strike) which engages the
end plate. As depicted in the drawings the strike is attached to
the frame structure by a fastening element located a substantial
distance from the inclined portion of the strike. This allows the
strike to be flexed or bent upwardly in reaction to the stress
forces exerted on the strike when the end plate is pivoted into and
out of the fixed stretching position. Repeated flexure and/or
bending may result in loosening and/or premature failure of the
strike. Additionally, strike includes a relatively thin lip portion
which extends beyond the body of the strike and which rotatingly
contacts the end plate as it is pivoted into and out of the fixed
stretching position. This lip portion is subject to high amounts of
stress and is subject to flexure and/or bending which may lead to
premature failure.
[0011] Another limitation common to both the first and second
embodiments of the Schmeichel et al. patents is in the attachment
of the support frame about the perimeter of a cargo box of the
vehicle. In Schmeichel et al., a support frame is attached to an
inner side-wall by a C-shaped clamp. The effectiveness of the clamp
may, however, become compromised by overtightening the clamping
bolt and may lead to deformation and/or failure the body of the
clamp. Additionally, due to the tapered vertical attachment portion
of the frame support, there is a tendency for the clamp to become
dislodged from the clamping position.
[0012] The present invention provides improvements which address
these and other limitations associated with the prior art.
SUMMARY OF THE INVENTION
[0013] The present invention relates to a tonneau cover apparatus
for attaching and locking a flexible cover about a cargo box of a
vehicle such as a pickup truck. The apparatus preferably includes a
support frame, which is removably attached about the perimeter of
the cargo box of the vehicle. The flexible cover is attached both
to the support frame and to an end plate. The end plate is
configured to pivotally engage an end plate engagement member,
preferably two end plate engagement members, which are attached to
the support frame. As the end plate pivots about the end plate
engagement member to a fixed stretching position, the flexible
cover is suitably stretched or tensed. The apparatus preferably
includes, a support frame removably attached about the perimeter of
a cargo box of the vehicle, an elongated end plate attached to an
end of the flexible cover and an end plate engagement member
attached to the support frame, preferably one on each side of the
support frame. The end plate is preferably attached to an end of
the flexible cover and is configured to cooperatively engage and
pivot with respect to the end plate engagement member and into and
out of a fixed stretching position wherein the flexible cover can
be correspondingly be tensed and relaxed. The end plate engagement
member preferably has a radial receiving surface and the end plate
has a radial engaging surface, which slidingly engages the radial
receiving surface when the end plate pivots into and out of the
fixed stretching position.
[0014] An object of the present invention is to improve the
attachment of the support frame to an inner side-wall of a
vehicle.
[0015] Another object of the present invention is to reduce the
risk of over tightening in an attachment clamp.
[0016] Another object of the present invention is to maximize and
simplify securement of the end plate engagement member to the
support frame.
[0017] Yet another object of the present invention is to reduce
areas of high stress concentrations in the end plate engagement
member.
[0018] Still another object of the present invention is to lessen
the exposure of the latching member relative to the support
frame.
[0019] Another object of the present invention is to minimize
deflection of the engagement portion of the latching member in
response to force exerted by the end plate.
[0020] Yet another object of the present invention is to provide a
superior side bar securing clamp which withstands the normal
stresses associated with securing the support frame to side walls
of the pickup truck.
[0021] Still another object of the present invention is to reduce
inadvertent and/or unauthorized disengagement of a flexible cover
from a cargo box of a vehicle.
[0022] These and various other advantages and features of novelty
which characterize the present invention are pointed out with
particularity in the claims annexed hereto and forming a part
hereof. However, for a better understanding of the invention, its
advantages and objects obtained by its use, reference should be
made to the drawings which form a further part hereof, and to the
accompanying descriptive matter, in which there is illustrated and
described a preferred embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] FIG. 1 is a partially broken away perspective view of a
preferred embodiment of a tonneau cover apparatus 8 of the present
application, including a flexible cover 10 in accordance with the
present invention, attached to a pickup truck 6 (shown in broken
lines) with the cover 10 being disposed in a covered or fixed
stretching position;
[0024] FIG. 2 is a fragmentary perspective view of the preferred
tonneau cover apparatus 8 shown in FIG. 1 (but separated from the
pickup truck), illustrating the end plate and flexible cover after
they have been rotated out of the covered or fixed stretching
position shown in FIG. 1;
[0025] FIG. 3 is an enlarged fragmentary sectional view which
illustrates (1) the preferred apparatus in the fixed stretching
position, shown in FIG. 1, in which the end plate exerts a tensile
force on the flexible cover, and (2) (in phantom lines) the
preferred apparatus as it is unlatched and rotated out of the fixed
stretching position in which the flexible cover is relatively loose
or relaxed;
[0026] FIG. 4 is an enlarged simplified side view of a latch member
190 of the preferred apparatus, when disengaged from the apparatus
partial or complete views of the latch member, or parts thereof,
shown in situ in various;
[0027] FIG. 5 is a simplified fragmentary perspective view of a
side rail 106 of the preferred apparatus, partially shown in FIG.
3, with the latch member attached;
[0028] FIG. 6 is an enlarged perspective view of the locking member
60 of the preferred apparatus, which illustrates the position of
the locking finger and the location of the frictional elements;
[0029] FIG. 7 is an enlarged fragmentary perspective view of the
locking member 60 as it is being inserted into a channel 38 in the
end plate 20 and illustrates the interaction between the end plate
channel 38 and the frictional imparting element 74 and the guide
strips 80 (not shown) and 82;
[0030] FIG. 8 is an enlarged fragmentary sectional view as seen
generally along line 8-8 of FIG. 3 which shows a portion of the
preferred apparatus as it is attached to an inner side wall 12 of a
cargo box of a pickup truck and which illustrates in phantom lines
the locking member as it moves into engagement with the side rail
106;
[0031] FIG. 9 is an enlarged fragmentary sectional view of the
latching member illustrating the range of motion as the release
member 196 is depressed from the position shown in phantom so that
the end plate 20 (not shown) can be disengaged from the end plate
engagement member 170 (not shown) and showing the adjustability of
the latching member relative to the inwardly extending flange 118
of the side rail;
[0032] FIG. 10 is a fragmentary perspective view from inside a
cargo box of the pickup truck when the tailgate is in an open
position (not shown), the view showing the preferred apparatus in
the fixed stretching position with the latching member operatively
engaging the end plate, and the locking member disengaged from the
inwardly extending flange;
[0033] FIG. 11 is a fragmentary perspective view showing an
alternate embodiment of the invention, which is similar to the
preferred embodiment, but has different end plate 420 which engages
in a somewhat different way with the end plate engagement member
440, wherein the end plate 420 is shown in an engaged position, but
not in a fixed stretching position similar to that shown in FIG.
3;
[0034] FIG. 12 is an enlarged fragmentary sectional view of the
alternate embodiment of FIG. 11 which illustrates the alternate
apparatus in a fixed stretching position in which the end plate 420
exerts a tensile force to a flexible cover 10, and which
illustrates in phantom lines the apparatus as it is unlatched and
rotated out of the fixed stretching position in which the flexible
cover is relatively relaxed;
[0035] FIG. 13 is an enlarged fragmentary sectional view of a
further alternate embodiment of the present tonneau cover
apparatus, showing only a very small portion of an alternate pickup
truck 506 in phantom, and showing the end plate 520 in a fixed
stretching position;
[0036] FIG. 14 is an enlarged fragmentary sectional view of the
further alternate embodiment shown in FIG. 13, shown separate from
the pickup truck, but showing the end plate 520 pivoted out of the
fixed stretching position such that the flexible cover 510 is
relatively loose or relaxed;
[0037] FIG. 15 is a fragmentary sectional view of the further
embodiment shown in FIG. 13 as generally seen from line 15-15 of
FIG. 13 showing the side rail 606 clamped to the sidewall 512 of
the pickup truck 506 and showing the locking member 560 in a
locking position where the finger portion 568 of the locking member
560 is engaged with an inwardly extending flange 618 of the side
rail 606 to hold the end plate 520 in the fixed stretching
position;
[0038] FIG. 16 is a fragmentary section view similar to that shown
in FIG. 8, but of a portion of yet another alternate embodiment
which is the same as the preferred embodiment shown in FIG. 8
except that there is no latch member and the locking member 760,
while it is similar to the locking member 60 shown in FIG. 8, is
shown in a disengaged position where the locking member 760 is in
contact with the inwardly extending flange 818, furthermore, the
locking member 760 does not have guide strips or a friction
imparting element as disclosed in association with locking member
60 and locking member 760 slides easily within channel 738 which is
the same as channel 38 in end plate 20 of the preferred embodiment
shown in FIG. 8; the locking member 760 differing from locking
member 60 also because it is secured within the end plate 720 with
a tension spring 774 which biases the locking member 760 toward a
position consistent with a latched or locked position shown in FIG.
17;
[0039] FIG. 17 is a further fragmentary sectional view of the
alternate embodiment shown in FIG. 16 except the locking member 760
is shown in a locked or latched position where the finger portion
768 is fully engaged with the inwardly extending flange 818 and
abuts against stop bolt 819 which prevents locking member 760 from
being drawn in further by the tension spring 774; and
[0040] FIG. 18 is a fragmentary sectional view similar to that
shown in FIG. 17, but of a further alternate embodiment the same as
that shown in FIG. 17 except that the locking member 960 is biased
toward a position consistent with a locked or a latched position by
a compression spring 980 pushing the locking member 960 to such
position rather than operating in the manner the tension spring 774
shown in FIG. 17, that biases the locking member 760 by pulling on
it.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
[0041] Referring now to the drawings, and specifically FIGS. 1-10,
there is illustrated a preferred embodiment of the present
invention, wherein reference numeral 6 designates a vehicle,
preferably a pickup truck, reference numeral 8 designates a
preferred tonneau cover apparatus and reference numeral 10
designates the flexible cover. FIG. 1 illustrates a flexible cover
10 in use on a cargo box 1 1 of a pickup truck 6 having two outer
sidewalls 12, each having an inner sidewall 14 (shown in FIG. 8), a
forward end 13 and a tailgate 16, preferably with a release handle
and lock mechanism 18, actuated with a key (not shown) or,
alternatively, a remotely actuated lock mechanism, having a remote
keyless actuator (not shown), like those which are now well known
in the art. As depicted, the flexible cover 10 is covering a top of
a perimeter the cargo box 11 of the pickup truck 8. The flexible
cover 10 is secured to a front plate 19 and an end plate 20 each of
which are secured to support frame 104 that includes rails 106
which are clamped to the respective sidewalls 12 of the pickup
truck 6.
[0042] FIG. 2 shows the preferred tonneau cover apparatus 8,
including the flexible, stretchable fabric cover 10, separated from
the pickup truck. The rearward end of the flexible cover is
attached to an elongated end plate 20 having an end plate cap 90
with an exterior surface 92. The other end of the flexible cover 10
is preferably attached to the front plate 19 (shown in FIG. 1) in a
manner similar to that disclosed in U.S. Pat. No. 5,906,407 to
Schmeichel ('407 patent), the disclosure of which is hereby
incorporated herein by reference. The front plate 19 is preferably
secured to the respective side rails 106 in an equivalent or
similar manner that is disclosed in U.S. Pat. No. 5,076,338, the
disclosure of which is hereby incorporated by reference, or in
other Schmeichel patents that are incorporated herein by reference.
In preferred embodiments, the front plate 19 will be secured to the
respective side rails 106 in the manner disclosed in the '407
patent. The flexible cover 10 is preferably made of a resilient
fabric material, which is preferably laminated to a polyester sheet
to give it strength, flexibility, additional resilience, and water
resistance.
[0043] The preferred tonneau cover apparatus 8 is secured to the
sidewalls 12 of the pickup truck 6 using clamps 130 (see FIGS. 3
and 8), which secure the respective side rails 106 to the inner
wall 14, which is an extension of the sidewall 12. The front plate
19 is secured to the respective side rails 106 as described above
and the end plate 20 is engaged to a pair of end plate engagement
members 170 (see FIGS. 3 and 5). When the end plate 20 is engaged
it will initially occupy a position with respect to the respective
engagement members 170 similar to that shown in phantom in FIG. 3.
The distal end 32 of the end plate 20 is then pushed downward and
the peak or crest 26 of the proximate end 20 will then pivot
against the pivot point 176 of the respective engagement member 170
such that the foot 30 of the end plate 20 will push the pawl
element 200 of the latch member 190 downward and out of its path,
so that the end plate 20 can become fully engaged within the
respective engagement members 170 and the foot 30 becomes fully
engaged within the inclined portion 178 (see FIG. 5) of the
engagement member 170, as shown in FIG. 3. In this position, the
end plate 20 is in a closed or a fixed stretching position, where
the end plate 20 preferably exerts a tensile force upon the
flexible cover 10 so that the flexible cover 10 will stretch and
remain taught over the cargo box 11.
[0044] When the end plate 20 is in the fixed stretching position,
locking members 60 can be pushed into a closed or locking position
to prevent the end plate 20 from being disengaged from the
respective engagement members 170. The locking members 60 slide,
when pushed, within a second channel 38 in the end plate 20.
Because locking members 60 are designed to create friction when
moved within the second channel 38, it takes some force to move the
locking members 60 into a locking position like that shown in
phantom in FIG. 8. This requirement for force to slide the locking
members is designed to prevent the locking members from
accidentally sliding into such a position when they are meant to be
disengaged, and from sliding into an unlocked or disengaged
position similar to that shown in FIG. 8 when they are meant to be
in the fully engaged or locked position shown in phantom in FIG.
8.
[0045] When the end plate 20 is in the closed or fixed stretching
position shown in FIG. 3, and it is desirable to open the tonneau
cover apparatus 8 to gain access to the cargo box 11, the locking
members 60 must be moved to a position where they are not engaged
with the inwardly extending flange 118 of the support structure
104. The latch member 190 must then be depressed to a position
consistent with that shown in phantom in FIG. 3 so that the pawl
element 200 is disengaged from the foot 30 of the end plate 20 so
that the foot can pivot out of the cavity proximate the inclined
portion 178 of the engagement member 170 without being impeded by
the pawl element 200. This can be accomplished either by pushing
downward on the release member 196 or pulling downward on the grip
element 236 with enough force to bend the latch member 190. In this
way, the end plate 20 is freed to pivot out of the fully engaged
relationship with the respective engagement members 170 and release
the tension on the flexible cover and even roll the flexible cover
up around the end plate in a manner similar to this described in
the previously described and incorporated Schmeichel patents.
[0046] As depicted in FIG. 2, the end plate 20 is disengaged from a
pawl element 200 on a latching member 190 and a locking member 60
is disengaged from a raised longitudinal portion 118 of a side rail
106 (shown in FIG. 8) prior to pivoting or rotating the end plate
20 about an end plate engagement member 170 and out of a fixed
stretching position shown in FIG. 1. Although a generally
rectangularly shaped end plate 20 is depicted in the drawings, it
is understood that the end plate 20 may have other configurations
without departing from the spirit and scope of the invention.
Moreover, it is understood that only selected portions of the end
plate 20 are necessary to normal operation and that unnecessary
portions may be omitted, if desired. In preferred embodiments the
end plate is made of an aluminum alloy material.
[0047] FIGS. 2, 3, 5 and 8-10 also illustrate attachment of the
flexible cover 10 to the support frame 104. As depicted, the
support frame 104 preferably includes side rails 106 having a
vertical attachment portion 108 including a sidewall contacting
surface 110, an inwardly extending portion 114, and an inclined
portion 116 onto which one half of a two part, hook and loop type
fastener 124 has been attached. The flexible cover 10 has been
provided with the other half of the two part, hook and loop type
fastener 124 to enable the sides of the flexible cover 10 to be
removably attached to the inclined portion 116 of the side rail
106. One method by which an end of the flexible cover 10 is
attached to a portion of the end plate 20 shown in FIG. 2 is
described in U.S. Pat. Nos. 5,076,338 and 5,174,353, the
disclosures of which are incorporated by reference. Note that in
the embodiment shown in FIG. 2 the strap 86 is attached to a
locking member 60 rather than a portion of the end plate itself. It
will be appreciated that this strap might be just as effective if
it were attached directly to the end plate (not shown) in other
embodiments and that it need not be attached to the locking members
60. As shown in FIG. 12, which discloses an alternate embodiment,
the flexible cover material can be secured in such a way that
additional material creates a flap 123 which covers the top of the
tailgate 16 and provides a further seal or covering to limit the
passage of dust and moisture into the cargo box 11.
[0048] FIGS. 3 and 10 illustrate the apparatus as it pivots or
rotates position into and out of a fixed stretching position and
when in the fixed stretching position. As best seen in phantom
lines, end plate 20 includes a distal end 32, which terminates in a
first channel 36, which receives an end of the flexible cover 10.
The end plate 20 also includes a second channel 38, which is sized
to slidingly receive a locking member 60. The second channel 38 is
generally T-shaped and includes opposing sidewalls 40, 42 an upper
wall 44 and opposing flanges 46, 48. The end plate or stretcher bar
20 also includes cavities, which are sized to receive plugs 94, 96
that extend from an end plate cap 90. The plugs 94, 96 are provided
with ribs 98, 100 which allow the end plate cap 90 to be
frictionally attached to the end plate 20. When the end plate 20 is
rotated or pivoted into a fixed stretching position, a peak or
crest 26 of the end plate 20 contacts a pivot point 176 of an end
plate engagement member, or strike 170. A ridge 28 on the base
portion 24 of the end plate 20 then sweeps an upper surface 182 of
an extension portion 174 of the end plate engagement member 170.
Referring now also to FIGS. 4-5 and 8-9, the ridge 28 then contacts
and deflects the pawl element 200 of the engagement portion 194 of
a latching member 190. That is to say, the latching member 190 is
deflected from a first position where the end plate is prevented
from being disengaged from the fixed stretching position to a
second position, which permits the apparatus to be disengaged from
the fixed stretching position. After the ridge 28 passes the pawl
element 200, two things occur. First, the base portion 24 is moved
into a base portion receiving area 180 in the end plate engagement
member 170, and second, the latching member 190 moves from the
second position to the first position wherein the pawl element 200
of the latching member 190 is biased into a pawl receiving area 50
of the end plate where it confronts a foot 30 on the end plate 20.
The pawl element 200 may be disengaged from the foot 30 and
withdrawn from the pawl receiving area 50 by placing downward
pressure on a release member 196 or pulling downward on a grip
element 236.
[0049] Turning more specifically to FIG. 4, the latching member 190
has a body portion 192, an engagement portion 194, a release member
196 and an attachment portion 198. The engagement portion 198
includes a pawl element 200 having a ridge engagement surface 202
and a foot engagement surface 204. Adjacent the foot engagement
surface 204 is a recess or relief 206 which accommodates a
fastening element 186 used to attach the end plate engagement
member or strike 170 to the support frame 104 (see FIG. 3). Note
that the angle "A" between the foot engagement surface 204 and a
top surface 207 of the recess 206 of the body portion 192 is
preferably less than or equal to 90 degrees, preferably less than
90 degrees and preferably around 88 degrees to prevent the end
plate 20 from being forced out of the fixed stretching position
when lifting force is applied upwardly upon the bottom of end plate
20 when it is in the fixed stretching position as shown in FIG. 3.
The upper surface 212 of the latch member 20 is generally parallel
with the top surface 207 of the recess 206, so the angle "A" will
be the same as an angle (not shown) between the foot engagement
surface 204 and the upper surface 212 of the latch member 190. The
latching member 190 includes a release member 196, which is
preferably an upright member 208 with an enlarged head 210. In
operation, the release member 196 is manipulated by placing
downward pressure on the enlarged head 210 of the release member
196 through the flexible cover 10 and is used to disengage the pawl
element 200 from the foot 30 of the end plate 20. Referring now
also to FIG. 9, an upwardly extending recess 214, having a throat
portion 216, partially delineates or separates the attachment
portion 198 from the body portion 192. The attachment portion 198
is connected to the body portion 192 by a thinned portion 218. The
attachment portion 198 includes a slot 226, which receives a
fastener 220 and a threaded aperture 228, which receives an
adjustment member or element 230. The attachment portion 198 also
includes a limiter or stop 232, which controls the range of motion
of the latching member 190 as it moves from the first position to
the second position. Note that the upper and lower surfaces 198a,
the attachment portion 198, that are parallel to broken line 198c
(shown schematically in FIG. 4), reside at an angle, B, with
respect to upper and lower surfaces 192a, 192b of the body portion
192, respectively, when the latch member 190 is disengaged from the
side rail 106. This angle "B" is preferably about 1 to about 7,
more preferably about 3 to about 5, more preferably about 4 degrees
and ensures that the upper surface 212 of the latching member 190
biasingly contacts an inwardly extending flange 118 on a side rail
106 when the latching member 190 is attached thereto as shown in
FIGS. 3 and 5. The latching member 190 is preferably manufactured
from a glass filled nylon resin material.
[0050] FIG. 5 illustrates the juxtaposition between a side rail 106
an end plate engagement member or strike 170 and a latching member
190. As can be seen, the side rail 106 includes an inclined portion
116 and an inwardly extending flange 118 with an upper surface 120.
The end plate engagement member 170 generally includes a body
portion 172 and an extension portion 174. More specifically, the
body portion 172 includes a pivot point 176, an inclined portion
178 and an end plate base portion receiving area 180. The extension
portion 174 is somewhat tapered and includes an upper surface 177
and an aperture 188. Referring now also to FIG. 3, the end plate
engagement member 170 has a lower surface 184 common to the body
portion 172 and the extension portion 174. Also referring to FIG.
3, the body portion 172 of the end plate engagement member 170
includes an integrally attached fastening element 186, a portion of
which extends beyond the body portion 172 and through an aperture
126 in the flange 118 and which is secured by an appropriately
sized nut 127. Like the aforementioned latching element 190, the
end plate engagement member 170 is formed so that the lower surface
184 is slightly concave. This allows the extension portion 174 to
biasingly contact the upper surface 120 of the flange 118 when the
end plate engagement member 170 is attached thereto. As with the
aforementioned latching member, the end plate engagement member 170
is preferably manufactured from a glass filled nylon resin
material.
[0051] The bolt or fastening element 186 preferably has an axis "b"
which passes through the center of the bolt 186. This axis "b" is
preferably located a distance from the pivot point 176 and denoted
by line "a" in FIG. 3, by a distance "d.sub.1" which is preferably
equal to or less than 4 inches, more preferably 3 inches, even more
preferably 2.5 inches, even more preferably 2.0 inches, even more
preferably 1.5 inches, even more preferably 1.25 inches, more
preferably 1.0 inch, and even more preferably seven-eighths of an
inch. In a more preferred embodiment, this distance will be about
{fraction (13/16)}ths of an inch.
[0052] FIG. 6 illustrates a locking member 60 in isolation prior to
use. The locking member 60 generally comprises an upper portion 62,
a lower portion 64 and a web 66 therebetween. In particular, the
upper portion 62 includes a top surface 72 onto which a
friction-imparting element 74 has been affixed. The term
friction-imparting element in the context of this invention is
understood to mean a material, which is capable of causing friction
between the locking member 60 and the end plate 20 when the locking
member is moved within the end plate. The preferred friction
imparting element 74 in this instance is a loop portion of a hook
and loop type fastening element. The upper portion 62 also includes
opposing side surfaces 76, 78 and corresponding opposite guide
strips 80, 82. The term guide strip in the context of this
invention is understood to mean a structure, which is preferably
relatively rigid in comparison to the friction-imparting element,
although it need not be so. The preferred guide strip in this
instance is composed of the same material as the locking member. As
illustrated, the upper portion 62 has the same general
cross-sectional T-shape as the channel 38 into which it is
inserted. While a T-shape is illustrated, it is understood that the
channel 38 and upper portion 62 may be formed in other
complimentary configurations without departing from the spirit and
scope of the invention. When locking member 60 is first placed into
the channel 38, the guide strips 80, 82 are generally shaved off a
bit to fit the channel. Once the resulting shavings 83 fall away,
the locking member 60 will be friction fit in the channel 38. This
is important so that the locking member will not inadvertently
slide closed when it is intended to be open or slide open when it
is intended to be closed. Turning to the lower portion 64, one end
of the lower portion includes a finger 68, which extends beyond the
body of the lower portion 64. The finger portion 68 includes an
engagement surface 70, which is configured to slidingly engage the
flange 118 of a side rail 106 (see FIG. 8). The lower portion 64 is
also provided with a slot 84 through which a strap 86 may be
threaded, the strap 86 serving to position and align the base
portion 24 of the end plate 20 adjacent the end plate engagement
member or strike 170 prior to pivoting the end plate into the fixed
stretching position shown in FIGS. 1 and 3.
[0053] FIG. 7 illustrates a locking member 60 as it is being
installed into a channel 38 of an end plate 20. As the locking
member 60 is inserted into the channel 38, the friction-imparting
element 74 is compressed and comes into sliding contact with the
upper surface 44 of the channel 38 (see FIG. 3). At the same time,
the guide strips 80, 82 are engaged by sidewalls 42, 40 of channel
38 (see also FIG. 3). The sidewalls 42, 40, being constructed of
relatively harder material, modify the opposite guide strips as the
locking member is inserted into the channel 38. As depicted a
portion 83 of the opposite guide strips are planed away or shaved
during assembly. Thus, the width of the upper portion 62 and
attendant guide strips 80, 82 is then sized to friction fit within
the width of the channel 38. In especially cold weather, the resin
material of the preferred locking member 60 and the aluminum alloy
of the preferred end plate both contract, but the locking member 60
will contract somewhat more than the end plate 20. In especially
hot weather, both the preferred locking member 60, made of resin
material, and the preferred end plate 20, made of aluminum alloy,
will expand, but it is believed that the expansion of the aluminum
alloy will be greater. In each case, therefore, in both especially
cold temperatures and in especially hot temperatures, the preferred
locking member 60 and the preferred end plate 20 will contract or
expand at different rates and this will cause some looseness of the
sliding locking member 60 within the end plate 20. The use of the
friction-imparting element 74 is intended to compensate for this
variation and to prevent the locking member 60 from sliding into a
locked position when it has been placed, and is intended to remain
in, an open position.
[0054] In the preferred embodiment, the friction imparting element
74 and the guide strips 80, 82, are all in sliding contact with the
walls 44, 42, 40, respectively, while the remaining surfaces of the
upper portion 66 are in sliding contact with flanges 46, 48 of the
second channel 38. These sliding contacts combine to provide a
relatively constant resistive force over a wide range of
temperatures as the locking element is manipulated along the
channel. While the preferred embodiment features one friction
imparting element and a plurality of guide strips elements, it is
understood that other combinations may be used. As with the
aforementioned latching member and end plate engagement member, the
locking member 60 is preferably manufactured from a glass filled
nylon resin material.
[0055] FIG. 8 illustrates a portion of the apparatus attached to an
inner sidewall 14 of the pickup truck. More specifically, a side
rail 106 of the support frame is attached to the inner sidewall 14
preferably by a plurality of clamps 130. The clamp 130 has a first
arm 132 and a second arm 150. As illustrated, the first arm 132 and
the second arm 150 engage each other at contact surfaces 139 and
157, respectively. The contact surfaces 139 and 157 serve several
different functions. First, the contact surfaces 139 and 157
provide a point about which the arms 132 and 150 may pivot with
respect to each other. And second, the contact surfaces 139 and 157
serve to align and guide the arms 132 and 150 so that they are
brought into confronting relation with each other when the clamp
130 is tightened. The first arm 132 includes a proximal end 134, a
transition portion 136 and a distal end 138. The proximal end 134
includes a contact surface 139 having a recess 140, which is
configured to receive and rotatingly support a pivot or projection
158 on the second arm 150. The preferred configuration of the
recess 140 is generally oriented orthogonally to the longitudinal
axis of the arm 132. The proximal end 134 also includes a
transversely aligned cavity 144, which is coaxially aligned with an
aperture 166 in a nut 167. The cavity 144 is sized to securely
retain the nut 167 of a fastening element 169, which includes nut
167 and bolt 164. The cavity 144 is sized to loosely receive the
shaft of a bolt 164 of the fastening element 169. Although the
aperture 166 is sized to fit the bolt 164, the cavity is much
larger which allows the clamp to fall open easily at the end
nearest the distal end 138 and distal non-parallel side joint
between two surfaces similar to that shown in FIG. 8. The distal
end 138 of the first arm 132 includes a sidewall-contacting portion
148, which is preferably provided with a grip element 148. The grip
element 148 has an irregular shaped surface and may be suitably
affixed to the sidewall-contacting portion 146. The preferred grip
element 148 has an irregular surface similar to course sandpaper
and the preferred method of affixing is by using an adhesive. The
second arm 150 includes a proximal end 152, a transition portion
154 and a distal end 156. As mentioned above, the proximal end
includes a contact surface 157 having a pivot or projection 158,
which is configured to be rotatingly supported within a recess 140
in the proximal end 134 of the first arm 132. As with the recess
140, the preferred configuration of the projection is generally
oriented orthogonally to the longitudinal axis of the arm 150. The
proximal end 152 of the second arm also includes a transversely
aligned cavity 145, which is sized to loosely receive the shaft of
a bolt 164 of the fastening element 169. The distal end 156
includes a side rail-contacting portion 162. As depicted, the
siderail-contacting portion 162 is configured to mesh with a
similarly configured surface on a vertical attachment portion 108
of a side rail 106. Since the oversized cavities 144, 145 of the
respective first and second arms 132, 150 allow the respective arms
to pivot within the joint created by the insertion of the pivot 158
into the pivot receiving recess 140, the respective side rail and
sidewall contact portions 146, 162, respectively, can pass through
a range of non-parallel orientations with respect to one another
especially enabling the clamp 130 to forcibly held together a pair
of relatively flat objects whose opposite surfaces when joined
together present non parallel surfaces.
[0056] In operation, to secure a side rail 106 to an inner wall 14
of a truck, a side rail 106 is brought into contact with an inner
sidewall 14 of a truck 6. A clamp 130 is then positioned so that it
straddles the inner sidewall 14 and the side rail 106. With the
recess 140 and the projection 158 of the respective contact
surfaces 139 and 157 in communication with each other, the
fastening element is then snugged up so that the distal ends 138
and 156 contact the sidewall 14 and side rail 106, respectively.
The fastening element is then manipulated to gradually increase the
clamping force. As the force is increased several things occur.
First, the arms 132 and 150 are aligned and guided by the
cooperative interaction of the contact surfaces 139 and 157.
Second, limiter surfaces 142 and 160 on the first and second arms
132, 150, respectively, converge towards each other, and third, the
arms 132, 150 flex slightly, at the transition portions 136, 154,
respectively, where they have some give due to the materials used
to make them and the design of respective first and second arms
132, 150 which include the narrower transition portions 136, 154,
respectively. When the limiter surfaces 142 and 160 contact each
other, attachment of the side rail 106 to an inner sidewall 14 is
essentially completed. This is because the clamp may not be easily
over tightened. With this preferred embodiment, not only is
possibility overtightening substantially reduced, but the clamp 130
provides a relatively constant clamping force, which compensates
for differences in thickness of the material to be clamped together
and also differences in attachment points.
[0057] FIG. 8 also illustrates the operation of the locking member
60 as it may be manipulated between a first position where it
operatively connects an end plate 20 to a side rail 106 of a
support frame 104 (shown in phantom lines) and a second position
where the locking member 60 is disengaged from the side rail 106 of
the support frame 104. Note in the first position, that engagement
surface 70 of the finger portion 68 engages the lower surface 122
of the side rail flange 118.
[0058] FIG. 9 illustrates in broken line a position of the latching
member 190 at the point where either the release member 196 has
been manipulated by placing a downward force upon it, or by pulling
downward on the body portion 192 or the chord 236 secured to the
far end of body portion 192 and the pawl element 200 (see FIG. 4)
has been disengaged from the pawl element receiving area 50 of the
end plate 20 (see FIG. 3). That is, the latching member 190 has
been moved to the second position. Note that the throat portion 216
has been effectively closed and the body portion 192 is in contact
with the limiter 232. As the release member 196 is manipulated, it
is contained within or encircled by an appropriately over-sized
opening 128 in the inwardly extending flange 118 of a side rail
106. The latching member 190 is attached to the flange 118 by a
fastening element 219, such as a bolt 220 and attendant washer 222
and nut 224. The bolt 220 is inserted through an appropriately
sized aperture 126 and through the latching member 190, after which
it is secured with a washer 222 and nut 224. The latching member
190 may be adjusted relative to the flange 118 and bolt 220 by the
provision of a somewhat oversized slot 226, which slidingly admits
the shaft of a bolt 220 of the fastening element 219. Positioning
of the shaft of the bolt 220 within the slot 226 may be achieved by
manipulating an adjustment bolt 230, which is threadably received
in a threaded aperture 228 within the attachment portion 198 of the
latch member 190.
[0059] Referring now specifically to FIG. 10, an end plate 20 is
shown in the fixed stretching position in which the pawl element
200 (see FIGS. 3 and 5) of the latching member 190 projects through
the flange 118 of a side rail 106 and into the pawl receiving area
50 of the end plate 20. The locking member 60 has been manipulated
or moved to the second position so that it lies inboard of the
flange 118. In this position, the finger 68 does not operatively
connect the end plate 20 to the support frame. Note that the strap
86 has one end, which is attached to the locking member 60, and
another end which is attached to a mid bar or bow 250. Such an
arrangement serves to guide the peak/crest 26 of the end plate 20
into operative contact with the pivot point 176 of the end plate
engagement member 170 prior to rotating the end plate 20 into the
fixed stretching position.
[0060] Referring now also to FIGS. 11 and 12, a further embodiment
of the tonneau cover apparatus 408 is depicted. This embodiment
differs from the preferred embodiment in that an end plate 420 is
provided with generally radially shaped base portion 422 and the
end plate engagement member 440 is provided with a reciprocally
similarly shaped base portion receiving area 442 so that the base
portion 422 can slidably pivot within the base portion receiving
area 442 when fully engaged therewith as shown in FIG. 11 where the
end plate 420 has been lifted away from the fixed stretching
position shown in FIG. 12 and the base portion 422 has pivoted
within the receiving area 442 slightly away from the fixed,
stretching position. As shown in phantom in FIG. 12, when the base
portion 422 is pivoted further, it will come away from the base
portion receiving area 442, but not before it has slidingly pivoted
somewhat within the receiving area 442.
[0061] In this embodiment, the reciprocating radial base portion
422 and base portion receiving area 442 of the end plate engagement
member 440 compliment each other so that the base portion 422 can
pivot smoothly within the engagement member 440 through a limited
but significant radius. When the base portion 422 has pivoted far
enough that the catch point 424 of the end plate 420 engagements
the pivot point 444 of the engagement member 440, the notch or dip
426 between the catch point 424 and the arcuate surface 428 of the
base portion 422 will rotate or slide over the rounded surface 446
of the pivot point 444, enabling the base portion 422 to disengage
from the base portion receiving area 442 of the end plate
engagement member 440.
[0062] Referring now also to FIGS. 13, 14, and 15, a further
alternate embodiment of the present invention is disclosed. In this
embodiment, the end plate 520 again has a radial base portion 522
that engages a reciprocating radial base portion receiving area
542. The base portion 522 can slide smoothly within the base
portion receiving area 542 in a manner similar to that disclosed
with respect to the embodiment disclosed in FIGS. 11 and 12, but
the arcuate catch point 424 and the arcuate surface 428, in the
embodiment disclosed in FIGS. 11 and 12, are replaced with a flat
catch surface 524. This surface joins to a portion of the radial
surface 525 to form a notch or dip 526 at the junction thereof. In
this case, however, when the notch or dip 526 becomes engaged with
the preferably round surface of the pivot point 676 of the
engagement member 670, the notch 526 will slide over or partially
around the pivot point 676, as the end plate 520 pivots further and
the base portion 522 disengages from the radial base portion
receiving area 542.
[0063] The alternate embodiment shown in FIGS. 13, 14 and 15 also
includes a locking member 560 that engages an inward extending
flange 618 of a side rail 606 in a manner similar to that disclosed
in the preferred embodiment, except that the locking member 560 is
configured differently and the finger portion 568 is configured
somewhat differently. In addition the locking member 560 is secured
within a channel 538 by securing a bolt 539 to the locking member
560 with a nut 541. The bolt 539 slides easily within the channel
538 to engage the inwardly extending flange 618 of the side rail
606. In preferred embodiments, the end plate 520 will have a pair
of radial base portions 522 proximate the respective ends of the
end plate 520 which are configured to reciprocally engage a pair of
engagement members 670 secured to each of a pair of side rails 606
attached to respective sidewalls (not shown) of the pickup truck
506. The other features of this alternate inventions are similar to
or the equivalent to those features of the preferred embodiment
disclosed in FIGS. 1-10.
[0064] Referring now also to FIGS. 16 and 17, yet another alternate
embodiment of the present invention is disclosed in which the
alternate embodiment differs from the preferred embodiment
disclosed in FIGS. 1-10, but providing an alternate locking member
760 which slides easily within a channel 738 similar to the second
channel 38 of the preferred embodiment. In the alternate embodiment
shown in FIGS. 16 and 17, the locking member 760 does not include
the friction imparting elements or guide strips of the preferred
embodiment. Instead, the alternate end plate 720 includes a tension
spring 774 secured at each end of the elongated end plate 720 to
bias each of two locking members toward a position consistent with
a closed or locked position similar to that shown in FIG. 17. The
tension springs 774 are secured to the respective interior surfaces
(not shown) of respective end caps 790 at each of the ends 793 of
the alternate end plate 720 and to the respective locking members
760, thereby biasing each of the locking members 760 toward a pair
of stop bolts 819 secured to the end plate 720 proximate each of
the respective ends 793 of the end plate 720. A draw cord or cable
765 is also attached to each of the respective locking members.
Each of the respective draw cords are preferably passed through an
eyebolt guide 767 and gathered together in a guide actuator
769.
[0065] During use, the alternate end plate 720 provides a locking
or latch mechanism because the chamfered or beveled bottom surface
781 of each of the finger portions 768 of each locking member 760
will be displaced when the endplate 720 pivots with respect to the
engagement members (not shown) into a closed or fixed stretching
position from a position in which the end plate 720 is engaged with
the respective engagement members (not shown), but has not pivoted
into the position shown in FIG. 17. In FIG. 16, the locking members
760 are just beginning to be displaced as the end plate 720 pivots
down to a closed position shown in FIG. 17. When the locking
members 760 rest against the stop bolts 819, against which they are
biased by the tension spring 774, they will engage the flange 818
if the end plate 720 is in the closed or fixed stretching position.
As the end plate 720 is pivoted with respect to the engagement
members (not shown), the beveled bottom surface 781 will first
contact the upper side of the end 821 of the respective inwardly
extending flange 818, will be forced away from the stop bolt 819
until the finger portion 768 passes below the flange 818 and end
plate 720 is fully engaged as shown in FIG. 17. In FIG. 17, the
beveled bottom surface 781 is no longer engaged with the upper side
of the end 821 of the inwardly extending flange 818, and the spring
biased locking member will engage the flange 818 as shown in FIG.
17. When the end plate 720 is not engaged as shown in FIG. 17 the
spring biased locking member 720 will slide to the same position
shown in FIG. 17, because it will spring biased against the stop
bolt 819 which is positioned within the end plate 720 such that the
locking member 760 will stop against the stop bolt 819 is the same
position it will occupy within the end plate 720 when the locking
member 760 is biased up against the end 821 of the flange 818.
[0066] In order to lift the end plate 720 and pivot it out of the
fixed stretching position in which it resides in FIG. 17, a user
can draw the draw cords or cables 765 by pulling on the pull
actuator 769, thereby drawing the locking members 760 away from
each of the respective flanges 818, thereby disengaging the
respective finger portions 768 from the respective flanges 818 as
shown in phantom in FIG. 17 when the locking members 760 are in
this position, the end plate 720 can be pivoted out of the
respective engagement members, and the cover 710 can be rolled up
in order to gain better access to the cargo box.
[0067] Yet another alternate embodiment is shown in FIG. 18 where
an embodiment like that shown in FIGS. 16 and 17 is shown, but
which differs primarily only because the tension springs 774 of the
embodiment shown in FIGS. 16 and 17 are replaced by compression
springs 974 which pushes, rather than pulls the locking member 960
or members, if there are more than one, which there preferably are,
against the flange 1018 and/or the stop bolt 1019. In this case,
the compression spring 974 slides over and is engaged by a first
spring guide protrusion 977 extending away from the locking member
960 and a second spring guide protrusion 979 extending away from a
spring stop 983. All the other features of this embodiment are
preferably the same as the features of the alternate embodiment
shown in FIGS. 16 and 17 and this embodiment operates generally in
the same way with the exception of the operation of the compression
spring 974 as compared to the tension spring 774.
[0068] It is to be understood, however, that even though numerous
characteristics and advantages of the present invention have been
set forth in the foregoing description, together with details of
the structure and function of the invention, the disclosure is
illustrative only, and changes may be made in detail, especially in
matters of shape, size and arrangement of parts within the
principles of the invention to the full extent indicated by the
broad general meaning of the terms in which the appended claims are
expressed.
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