U.S. patent number 3,873,054 [Application Number 05/353,744] was granted by the patent office on 1975-03-25 for adjustably positionable seat support.
This patent grant is currently assigned to Burchfield and Turner Enterprises. Invention is credited to Dale P. McKee, Richard D. McKee.
United States Patent |
3,873,054 |
McKee , et al. |
March 25, 1975 |
ADJUSTABLY POSITIONABLE SEAT SUPPORT
Abstract
A seating support particularly adapted for use in motor homes
and like vehicles to selectively adjust multi-purpose seats, namely
the driver and front passenger seats. Hardware is provided for
rotational positioning and for adjustable inclination and height as
well, there being a manual control readily accessible to the person
while seated to adjust the seat as desired. Durability is increased
by revolvement of a seat adapter about a metacenter which migrates
so as to establish straight-line positioning of inclination stops
in a carrier aligned with rotational stops in a base; and to the
end that one control means serves dual purposes.
Inventors: |
McKee; Dale P. (Canoga Park,
CA), McKee; Richard D. (Canoga Park, CA) |
Assignee: |
Burchfield and Turner
Enterprises (Fresno, CA)
|
Family
ID: |
23390385 |
Appl.
No.: |
05/353,744 |
Filed: |
April 23, 1973 |
Current U.S.
Class: |
248/371; 403/84;
248/418 |
Current CPC
Class: |
B60N
2/143 (20130101); A47C 3/025 (20130101); Y10T
403/32262 (20150115) |
Current International
Class: |
A47C
3/02 (20060101); A47C 3/025 (20060101); B60N
2/04 (20060101); B60N 2/14 (20060101); F16m
011/04 () |
Field of
Search: |
;248/184,185,186,371,393,397,398,399,407,409,425 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Schultz; William H.
Claims
I claim:
1. An adjustably positionable seat support including, an adapter
for supporting engagement with the underside of the seat and having
spaced fore and aft elongated guide means, the foremost guide means
being declined and the rearmost guide means being inclined, the
forward extremities of said fore and aft guide means being in a
plane normal to a line projecting from a point therebetween and
extending through and beyond the underside of the seat to a
metacenter above the seat, and a supportable carrier with fore and
aft pivots slideably engageble in said fore and aft guide means and
spaced to move to and from the forward extremities of said guide
means respectively whereby fore and aft motion of the adapter
causes rotation thereof about said metacenter.
2. The adjustably positionable seat support as set forth in claim
1, wherein said fore and aft guide means are slots respectively,
and wherein the said pivots are pins rotatably and slideably
engageable in the slots.
3. The adjustably positionable seat support as set forth in claim
1, wherein said fore and aft guide means are arcuate slots curved
about said metacenter respectively, and wherein the said pivots are
pins rotatably and slideably engageable in the arcuate slots.
4. The adjustably positionable seat support as set forth in claim
1, wherein said fore and aft guide means are straight slots
disposed normal to said metacenter respectively, and wherein the
said pivots are pins rotatably and slideably engageable in the
slots.
5. The adjustably positionable seat support as set forth in claim
1, wherein the adapter has opposite side flanges depending from the
underside of the seat cushion, wherein said fore and aft guide
means comprise complementary pairs of slots in the opposite side
flanges respectively, and wherein the said pivots are pins disposed
on transverse axes rotatably and slideably engageable in the
complementary pairs of slots respectively.
6. The adjustably positionable seat support as set forth in claim
1, wherein the adapter has opposite side flanges depending from the
underside of the seat cushion, wherein said fore and aft guide
means comprise complementary pairs of arcuate slots curved about
said metacenter and in the opposite side flanges respectively, and
wherein the said pivots are pins disposed on transverse axes
rotatably and slideably engageable in the complementary pairs of
arcuate slots respectively.
7. The adjustably positionable seat support as set forth in claim
1, wherein the adapter has opposite side flanges depending from the
underside of the seat cushion, wherein said fore and aft guide
means comprise complementary pairs of straight slots disposed
normal to said metacenter and in opposite side flanges
respectively, and wherein the said pivots are pins disposed on
transverse axes rotatably and slideably engageable in the
complementary pairs of slots respectively.
8. An adjustably positionable and controlled seat support
including, an adapter for supporting engagement with the underside
of the seat and having spaced fore and aft elongated guide means,
the foremost guide means being declined and the rearmost guide
means being inclined, the forward extremities of the said fore and
aft guide means being in a plane normal to a line projecting from a
point therebetween and extending through and beyond the underside
of the seat to a metacenter above the seat, a supportable carrier
with fore and aft pivots slideably engageable in said fore and aft
guide means and spaced to move to and from the forward extremities
of said guide means respectively, and control means determining the
fore and aft positioning of the adapter relative to the carrier,
whereby fore and aft motion of the adapter causes rotation thereof
about said metacenter arrested by said control means.
9. The adjustably positionable and controlled seat support as set
forth in claim 8, wherein the control means comprises a manually
releasable pin disengageably connecting the adapter and carrier
stopping said relative fore and aft motion.
10. The adjustably positionable and controlled seat support as set
forth in claim 8, wherein the control means comprises a manually
positionable pin shiftably carried by the carrier and disengageable
with the adapter stopping said relative fore and aft motion.
11. The adjustably positionable and controlled seat support as set
forth in claim 8, wherein the control means comprises a manually
positionable pin shiftably carried by the carrier and disengageable
with a series of stop openings in the adapter stopping relative
fore and aft motion.
12. The adjustably positionable and controlled seat support as set
forth in claim 8, wherein said fore and aft guide means are arcuate
slots curved about said metacenter respectively, wherein the said
pivotal pins are to rotatably and slideably engageable in the
slots, and wherein the control means comprises a manually
positionable pin shiftably carried by the carrier and disengageable
with an arcuate series of stops in a line curved about said
metacenter stopping said relative fore and aft motion.
13. The adjustably positionable and controlled seat support as set
forth in claim 8, wherein said fore and aft guide means are
straight slots disposed normal to said metacenter respectively, and
wherein the control means comprises a manually positionable pin
shiftably carried by the carrier and engageable with a straight
series of stop openings in the adapter stopping said relative fore
and aft motion.
14. The adjustably positionable and controlled seat support as set
forth in claim 8, wherein the adapter has opposite side flanges
depending from the underside of the seat cushion, wherein said fore
and aft guide means comprise complementary pairs of slots in the
opposite side flanges respectively, wherein the said pivots are
pins disposed on transverse axes rotatably and slideably engageable
in the complementary pairs of slots respectively, and wherein the
control means comprises a manually positionable pin shiftably
carried by the carrier and disengageable with the adapter stopping
said fore and aft motion.
15. A selectively retractible and inclinable seat support
including, a columnar supporting base of right cylinder form
disposed on a vertical axis, an adapter for supporting engagement
with the underside of the seat and having opposite side flanges
depending from the underside of the seat and complementary pairs of
spaced fore and aft elongated guide means in the opposite side
flanges respectively, the foremost guide means being declined and
the rearmost guide means being inclined, the forward extremities of
said fore and aft guide means being in a plane normal to a line
projecting from a point therebetween and extending through and
beyond the underside of the seat to a metacenter, a carrier
rotatably supported upon the first mentioned base and with fore and
aft pivots slideably engageable in said fore and aft guide means
and spaced to move to and from the forward extremities of said
guide means respectively, and control means determining the
positioning of the adapter relative to the carrier and base,
whereby fore and aft motion of the adapter causes rotation thereof
about the metacenter.
16. The selectively rotatable and inclinable seat support as set
forth in claim 15, wherein the said fore and aft guide means are
straight slots declined and inclined at substantially 30.degree. in
each instance, and wherein the said pivots are pins rotatably and
slideably engageable in the slots.
17. The selectively rotatable and inclinable seat support as set
forth in claim 15, wherein the said fore and aft guide means are
straight slots declined at substantially 34.degree. and inclined at
substantially 37.degree. respectively, and wherein the said pivots
are pins rotatably and slideably engageable in the slots.
18. The selectively rotatable and inclinable seat support as set
forth in claim 15, wherein the control means is a bolt
disengageably projected through at least one stop opening in the
adapter and through at least one stop opening in the base.
19. The selectively rotatable and inclinable seat support as set
forth in claim 15, wherein the control means is a bolt
disengageably projected through at least one stop opening in the
adapter and through at least one aligned stop opening in the base,
there being means retracting the bolt from the base stop opening
while maintaining bolt engagement through the adapter stop
opening.
20. The selectively rotatable and inclinable seat support as set
forth in claim 15, wherein the control means is a bolt
disengageably projected through at least one stop opening in the
adapter and through at least one aligned stop opening in the base,
there being means retracting the bolt from both the base and
adapter stop openings.
21. The selectively rotatable and inclinable seat support as set
forth in claim 15, wherein the control means is a bolt
disengageably projected through at least one stop opening in the
adapter and through at least one aligned stop opening in the base,
there being cam means with a minor incline retracting the bolt from
the base stop opening and with a major incline retracting the bolt
from both the base and adapter stop openings.
22. The selectively rotatable and inclinable seat support as set
forth in claim 15, wherein the control means is a bolt
disengageably projected through at least one stop opening in the
adapter and through at least one aligned stop opening in the base,
there being a reversely positionable cam means with a minor incline
retracting the bolt from the base stop opening and with a major
incline retracting the bolt from both the base and adapter stop
openings.
Description
BACKGROUND
Mobile living requires innovations in the usual furnishings of
vehicular housing, in that seating must be adaptable to traveling
as well as to living arrangements. Reference is made to "motor
homes" or "camping cruisers," as they are presently referred to,
wherein the front seating in the passenger compartment must be
adaptable to both the driving and living functions. That is, both
the driver and front seat passenger or passengers are to be seated
so as to face forward while traveling, while the same seating is to
be adjustable so as to face rearward when not traveling and used
for lounging. The general location of the seating is to be fixed
while the directional disposition and inclination is to be
selectively adjustable. Structural integrity is required for
withstanding inertial forces during travel, with sufficient safety
factor, and for taking the normal abuse involved as lounge seating.
In other words, severe accelerations and decelerations are involved
when traveling, always subject to accidents, and there is always
the normal possibility of overloading the seats on occasion.
Generally therefore, it is an object of this invention to provide
hardware for seating of the character referred to, that is
versitile in its adaptability to accommodate the driver and/or
passengers and to accommodate lounging occupants, all within the
vehicle compartment in which it is installed. With the present
invention, the seats per se can vary widely and are mounted by said
hardware to be employed as circumstances require.
The passenger and lounge compartments of motor homes and the like
are considerably more spacious than the passenger compartments of
the usual passenger car, and a characteristic feature of motor home
layout is to utilize space to a maximum degree. In other words,
space is at a premium, while an ordinary hometype lounge chair
tends to be bulky although comfortable by virtue of its size and
upholstery. It is an object therefore, to provide hardware for the
support of moderately large upholstered seating, adapting it to use
as vehicular seating and home type lounge seating, as desired. With
the present invention, the hardware is selectively adjustable to
dispose the rotational orientation as well as inclination to best
suit the functional purposes desired.
Hardware of the type under consideration is subject to being over
stressed while space for adequate leverage is limited. Reference is
made to the heft of pivots and lock devices as required by such
mechanisms because of the forces that are developed therein. Most
often, the forces involved in adjustably inclining seats are
relatively small but they are magnified by the moment arms involved
therein about fixed points.
Therefore and in accordance with the present invention, it is an
object to establish a direct application of mechanical forces about
a remote pivotal axis at a radius of substantial magnitude and all
to the end that applied forces are reduced accordingly.
Consequently, the structure need not be over designed and normal
sized pivots and lock devices make for a rugged and durable
construction.
It is another object of this invention to provide an adjustably
positionable seat support of the character referred to with
manually accessible controls that are practical and convenient.
There is a single control means provided for both rotation and
inclination, a control having a normal locked position with respect
to both adjustment functions and separate positioning for each
function respectively. The control is biased to lock and is
positioned when operated allowing the said person to shift the seat
into the desired position for relocking.
DRAWINGS
The various objects and features of this invention will be fully
understood from the following detailed description of the typical
preferred form and application thereof, throughout which
description reference is made to the accompanying drawings, in
which:
FIGS. 1 and 2 are side elevations of typical motor home seating
involvng the adjustably positionable seat of the present invention,
FIG. 1 showing a normal erect positioning and FIG. 2 showing a
fully declined position.
FIG. 3 is an exploded perspective view of the hardward involved in
the support shown in FIGS. 1 and 2.
FIG. 4 is an enlarged transverse sectional view taken as indicated
by line 4--4 on FIG. 1.
FIG. 5 is a plan section taken as indicated by line 5--5 on FIG.
4.
FIGS. 6 and 7 are enlarged detailed views showing the adjustably
inclined portion of the hardware, FIG. 6 corresponding to the
position thereof in FIG. 1 and FIG. 7 corresponding to the position
thereof shown in FIG. 2.
FIG. 8 is a modified form of the present invention similar to FIG.
6, and
FIG. 9 is a perspective view of one of the elements included in the
base portion of the hardware, as shown in FIG. 3.
PREFERRED EMBODIMENT
The adjustably positionable seat support is a fabrication that
involves generally, an adapter A, a base B, a carrier C, and a
control means D selectively releasing the carrier from either the
base or both the base and adapter. The adapter A and carrier C have
cooperative features establishing a metacenter X above and beyond
the pivotal connections thereof and relative to which the parts A
and C slide and simultaneously revolve. The revolvement of adapter
A adapts to the inclination desired and the control means D is at a
means radius x from the metacenter X to releasably engage with two
parts A and C. Further, the control means D is supported by the
carrier C at said mean radius x and is engageable through the
adapter for inclined adjustment and into the base for rotative
adjustment.
The adapter A mounts to and supports the underside 10 of the seat
S, which is any style or configuration as circumstances require. As
shown, the seat S has a flat planar underside 10 superimposed by an
upholstered cushion 11, there being an upholstered back 12
projecting normally therefrom. The cushion 11 and back 12 are
structurally integral while presenting the underside 10 for common
support. Essentially, the seat S is a unit to be adjustably
supported, to be adjusted as to inclination and to be adjusted as
to rotation. Thus, in accordance with the present invention the
seal S is adjustably positioned as to inclination and as to
rotation.
Referring now to the adapter A, this part of the device or hardward
involves a support plate 15 to which the underside 10 is fastened,
and depending parallel flanges 16 upon which the plate 15 and
attached seat S slideably pivots. The plate 15 is a flat planar
element with mounting holes 17 for securement by means of screw
fasteners 18 of the like into the underside 10 of seat S. The plate
has a pair of opposite and parallel depending flanges 16 in which
there are complementary declined and inclined guide means 20 and
25. The parallel flanges 16 are spaced transversely to receive the
upper portion of the carrier C which operates therebetween, the
declined guide means 20 being foremost and the inclined guide means
25 being rearmost. That is, the laterally spaced guide means 20 and
25 are spaced fore and aft, and they are essentially cam openings.
The front terminal ends 21 and 26 of the two slots terminate on
spaced axes a and b in a common plane parallel with the plane of
plate 15 and the underside 10. The rear terminal end 22 and 27 of
the two slots terminate in axes c and d in separate planes parallel
to and spaced below and above the aforementioned common plane of
spaced axes a and b. That is, as the guide means 20 and 25 extend
rearwardly they decline and incline respectively being effectively
equi-distant in their extent. In practice, the guide means 20 and
25 are in the form of slots with front and rear terminal end a and
b, and c and d, respectively.
Referring to the modified form shown in FIG. 8, the guide means 20'
and 25' are arcuate slots and curved about an exact metacenter X;
and wherein the adjustment openings in the adapter A' are located
on a radius common to a radius from the said metacenter. However,
and in accordance with the present invention, the guide means 20
and 25, are straight slots between the extremities 21 and 26, and
22 and 27 thereof, and all to the end that the metacenter X
migrates so as to move the control pin of means D in a
substantially straight line, as later described. That is, there is
a series of two or more spaced adjacent openings in a flange 16
located in a sequence with respect to adapter A, and in
sequentially positionable in a single horizontal plane with respect
to carrier C and base B.
In practice, the angular declination of the foremost slot 20 is
greater (for example 34.degree.) than the inclination of the
rearmost slot 25 (for example 27.degree.), in which case a control
opening 30 in flange 16 midway between axes a and b represents a
normal position and is disposed at or near a transverse metacentric
plane. A series of control openings, including openings 31 and 32,
extend rearwardly, and in the case illustrated an axis disposed on
a horizontal plane parallel to the underside 10. The transverse
metacentric plane is verrtically disposed and the sequential
control openings 30-32 are brought into alignment therewith by the
guiding cam action of guide means 20 and 25. Although the straight
slots are imperfect so as cause a vertical migration of the
metacenter X, said migration is so slight that the control opening
30-32 are adapted receive control pin 40 on a fixed horizontally
disposed axis e normal to a rotatable axis f midway between the
flanges 16, all as shown in FIGS. 6, 7 and 9. Further, the control
openings in base B are on axes that are coplanar and all of which
is advantageous.
Referring now to the base B, there is a deck flange 34 from which
there is a vertically projecting cylindrical column 46. The top
terminal end 47 of the base is in a bearing plane normal to the
vertical axis f of rotation, there being a circumferential series
of rotational lock openings 48 in a horizontal plane coincidental
with the axis of the aforementioned control pin 40. Vertical
adjustment is obtained by providing a sectional column 46 and by
securing telescopically related slideable section 46' and 46" with
clamp means 49 fixing one to the other. Thus, the base B is
extensibly adjustable in order to place the height of the seat as
may be required.
Referring now to the carrier C, there is a sleeve 50 of right
cylinder form engageable over the column 46, and there is a header
fixed thereto in a plane normal to the axis of rotation to bear
upon the end 47. Spaced pivot tubes are disposed on fore and aft
parallel axes preferably formed out of the header that is welded to
the sleeve, and said tubes are disposed on axes spaced the same as
axes a and b or c and d. To this end, therefore, there are guide
pins 51 and 52 engaged through the pivot tubes and adjacent the
flanges 16, to slideably and rotatably engage in the guide means
slots therein.
FIGS. 6 and 7 show the extreme adjusted positions of the seat
support corresponding to FIGS. 1 and 2. Note particularly that
there is little change in the metacentric height to X and that the
height of control pin 40 is essentially constant. Therefore, it is
possible to provide the control means D which operates in one
horizontal plane coincidental with the axis of control pin 40.
Accordingly, the control means D involves the pin 40 disposed on an
axis by a lateral extension 55 of the means C. The pin 40 is biased
toward the adapter A and base B by a spring 56, and in accordance
with the invention there is a cam means restricting the projection
of pin 40. The pin 40 is in the nature of a bolt with a lever 41 to
rotate the same, there being a cam 42 and a follower 43 to control
the depth of projection of the pin 40 into the adapter A and/or the
base B. In practice, the carrier C engages over and thereby
encompasses the base B and its circumferential series of lock
openings 48; and the adapter A engages over and thereby embraces
the carrier C shiftable in a plane to align with the control pin 40
and lock openings 48 brought into alignment therewith. Thus, the
control pin 40 is retractably biased through said openings 30-31
and 48. And, in accordance with this invention, the cam 42 has a
low center point 60 that permits full projection of pin 40, a
moderately sloped counter clockwise incline 61 that retracts the
pin 40 only from base B and a severely sloped clockwise incline 62
that retracts the pin from both the base and the adapter A.
From the foregoing it will be seen that we have provided a new and
useful adjustably positionable seat support adapted to be used in
connection with the construction of motor homes and camping
cruisers and the like. The seat support is incrementally adjustable
both as to rotation and as to inclination, by the use of a single
manual control. The displaced and elevated metacenter places the
pivotal point beyond the pivotal axes of the supporting pins and
thereby substantially increases the leverage, whereby the structure
is inherently strong and is capable of withstanding severe
acceleration and deceleration and any expected abuse.
Having described only a typical preferred form and application of
our invention, we do not wish to be limited or restricted to the
specific details herein set forth, but wish to reserve to ourselves
any modifications or variations that may appear to those skilled in
the art.
* * * * *