U.S. patent number 3,709,467 [Application Number 05/093,295] was granted by the patent office on 1973-01-09 for self contained adjustable support assemblies to support, raise, and lower a mobile living facility with respect to both a vehicle and the ground.
Invention is credited to James F. Mann.
United States Patent |
3,709,467 |
Mann |
January 9, 1973 |
SELF CONTAINED ADJUSTABLE SUPPORT ASSEMBLIES TO SUPPORT, RAISE, AND
LOWER A MOBILE LIVING FACILITY WITH RESPECT TO BOTH A VEHICLE AND
THE GROUND
Abstract
Mobile living facilities and other covered space structures are
equipped with self contained adjustable support assemblies to
support them above and lower them to ground, and to raise them
above and lower them down on the receiving structure of a vehicle.
Three self contained adjustable support assemblies are capable of
supporting the mobile living facilities when secured to these
facilities and resting on the ground. Each support assembly has a
supporting leg, an immediate leg surrounding guide sleeve secured
to the mobile living facilities, and adjustable interlocks to
secure supporting legs to the respective leg surrounding sleeves at
selective variable effective leg lengths between the surrounding
guide sleeve and the ground. Adjustments of the effective leg
lengths are made by utilizing a self contained hydraulic jack that
is removably positioned between each respective supporting leg and
its corresponding surrounding guide sleeve. The jacking device is
secured below to selective multiple receiving structures on the
supporting leg and secured above to a receiving structure on the
leg surrounding sleeve. Before jacking, and with the jacking device
in place, the respective adjustable interlock is withdrawn for the
duration of the jacking movement. Subsequently, it is reset to
thereafter transmit the lifting load independently of the jacking
device. The travel of each raising or lowering motion corresponds
to the travel of the removable jacking device. One jacking device
is moved about, during each overall height changing operation, to
be used with the respective several support assemblies. Generally,
four support assemblies are used and at least three are at all
times secured by interlocks and are capable of fully supporting the
mobile living facilities while the jacking unit is being used to
adjust the height of the fourth support assembly.
Inventors: |
Mann; James F. (Tacoma,
WA) |
Family
ID: |
22238174 |
Appl.
No.: |
05/093,295 |
Filed: |
November 27, 1970 |
Current U.S.
Class: |
254/45;
414/498 |
Current CPC
Class: |
B66F
1/08 (20130101); B60P 3/32 (20130101) |
Current International
Class: |
B60P
3/32 (20060101); B66F 1/00 (20060101); B66F
1/08 (20060101); B66f 007/26 () |
Field of
Search: |
;254/45,86H ;214/515
;248/354P |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Simpson; Othell M.
Claims
I claim:
1. Adjustable support assemblies to support, raise and lower a
covered space facility with respect to both a vehicle and the
ground, each assembly comprising:
a. a supporting leg;
b. a guide in which the supporting leg moves;
c. means to interlock the supporting leg to the guide at selective
effective heights of the supporting leg; and
d. means, to receive a self contained hydraulic jacking unit
positioned between the guide and the supporting leg, whereby, upon
release of the interlock means, a hydraulic jacking unit is moved
through it operating stroke to change the effective height of the
supporting leg, comprising a pin securable to a base of the
hydraulic jacking unit, several spaced pin receivers in the
supporting leg to receive the pin when it is secured to the
hydraulic jacking unit, a receiver secured to the guide into which
top portions of the hydraulic jacking unit may be inserted.
2. Adjustable support assemblies, as claimed in claim 1, wherein
each assembly also comprises an attachment structure to be secured
to a covered space facility to distribute loads transmitted from
the guide.
3. Adjustable support assemblies, as claimed in claim 2, wherein
multiple connection means are used between the attachment structure
and the guide, each comprising, overlapping horizontally extending
tabs with central openings, arranged in pairs and joined
respectively to the attachment structure and guide, and removable
fastener assemblies insertable through the central openings of the
tab and then secured to hold the extending tabs together and to
transmit the supporting loads between the covered space facility
and the guide.
4. An adjustable support assembly to be secured to the corner
structure of a camper dwelling, and operated in sequence with other
like adjustable support assemblies so secured to raise and to lower
a camper dwelling with respect to a pickup truck and then to
maintain the relative position selected, comprising:
a. a supporting leg having a foot for load distributing ground
contact and a body for relative movement with respect to a guiding
member, the body having spaced receiving structures to receive a
locking member and to receive a hydraulic jacking member;
b. a guiding member to receive the supporting leg for relative
movement and having a receiving structure to receive a locking
member and a receiving structure to receive a hydraulic jacking
member, and having fastener connection structures utilized when the
adjustable support assembly is secured to corner structure of a
camper dwelling;
c. a removable locking member for interlocking the body of the
supporting leg to the guiding member at selective effective load
carrying heights as the removable locking member is inserted
through receiving structure on the guiding member and through a
selected spaced receiving structure of the body of the supporting
leg while a hydraulic jacking member is supporting the load, and
thereafter upon complete insertion of the removable locking member,
the hydraulic jacking member is removed and prepared for making
another elevational change; and
d. a removable self contained hydraulic jacking unit having a
projecting means secured to its base to be selectively and
removably located in one of the several receiving structures of the
body of the supporting leg depending on the height adjustment to be
made, and also the top of the hydraulic jacking unit to be located
in a receiving structure of the guiding member, and thereafter, the
hydraulic jacking unit is effectively operated to raise and to
lower the camper dwelling with respect to a pick up truck, and,
when no longer needed, to be removed during rapid adjustments of
the body of the supporting leg relative to the guiding member when
no camper dwelling load is being supported such as when the camper
dwelling is securely in place on a pick up truck.
Description
BACKGROUND OF INVENTION
Dual purpose vehicles such as pickup trucks are being used not only
as trucks, but, alternately, also as recreational vehicles when
covered space structures, often fully equipped with living
accommodations, are secured to them for weekend and vacation trips.
There are now many loading and unloading tools, supports, and
facilities being used to unload and load these living
accommodations, generally called campers, on trucks, generally
called pickups. There are mechanical jacking facilities, cable and
winch adjusting facilities, and overall hydraulic lift systems.
However, none of these are arranged to combine mechanical
adjustable height supports with removable self contained hydraulic
height adjusting units to completely raise and lower the camper
with respect to both the pickup and ground.
SUMMARY OF INVENTION
Several self contained adjustable support assemblies, support
covered space structures, often having living facilities called
campers, when they are not in use and while they are raised and
lowered on to a vehicle, which is generally a pickup truck. At
least three adjustable support assemblies mechanically and
structurally support the camper at any one time while a fourth
adjustable support assembly is being changed in its overall
effective height.
The height change is made by employing a self contained hydraulic
jacking device. It is removably positioned between respective
receiving structures located on both a supporting leg and a leg
surrounding sleeve of a respective adjustable support assembly.
During each height adjustment of a respective support assembly, a
mechanical interlock between the supporting leg and its surrounding
sleeve is kept in a released positon until the new adjustable
height is reached.
The surrounding sleeves are positoned about the campers, generally
one at each corner, by using load distributing brackets, secured
between them and the campers by employing various fasteners. Using
these adjustable support assemblies, hydraulically moved in
sequency by operation of a removable hydraulic jacking unit, a
camper is always safely handled and supported in a most convenient
way.
DRAWINGS OF THE PREFERRED EMBODIMENT
FIG. 1 is a partial side elevation showing a camper living facility
in position on a pickup truck, and also indicating how adjustable
support assemblies are postioned at the time of transfer of the
weight of the camper to or from the pickup truck, one hydraulic
jacking unit being shown in place;
FIG. 2 is a partial perspective view showing how the hydraulic
jacking unit is positioned and operated to relatively move the
components of the adjustable support assemblies and consequently
cause movement of the camper relative to the pickup truck, the
mechanical interlock being shown in its retracted position;
FIG. 3 is a partial perspective view showing how the hydraulic
jacking unit is conveniently removed and installed to be
effectively used with all the adjustable support assemblies during
loading or unloading of the camper;
FIG. 4 is a partial elevational view alongside the pickup truck and
camper showing the right front adjustable support assembly with the
hydraulic jack in place;
FIG. 5 is a partial elevational view of the adjustable support
assembly, with the hydraulic jack in place, as viewed from the side
of a pickup truck and camper;
FIG. 6 is a partial sectional view taken along broken section line
6--6 of FIG. 4, showing the interlock in its locking position to
prevent relative movement between the supporting leg and the
surrounding sleeve; and
FIG. 7 is a partial sectional view taken along section line 7--7 of
FIG. 4, illustrating how the base of the hydraulic jack is held in
the supporting leg.
DESCRIPTION OF THE PREFERRED EMBODIMENT
General Arrangement and Operation
In FIG. 1, a pickup truck 10 is shown equipped with a camper 12. At
each corner of the camper 12, self contained adjustable support
assemblies 14 are illustrated in their neutral position, either
having just been used to lower camper 12 in place on pickup 10, or
having just been located to raise camper 12 above pickup 10. On the
right forward adjustable support assembly 14, a removable hydraulic
jack 16 is illustrated in its operating position.
If camper 12 is ready to be raised above pickup 10, then hydraulic
jack 16, after withdrawing an interlock 18, is actuated by hand
movements applying force through the lever handle 20, as
illustrated in FIG. 2. If, however, camper 12 is completely loaded
on pickup 10 and ready for a trip, then, as illustrated in FIG. 3,
hydraulic jack 16 is removed. Thereafter the supporting leg 22 is
raised up passing in part through the surrounding guide sleeve 24
to a position well clear of the roadway. Interlock 18, biased by
coil spring 26, keeps the supporting leg 22 and the guide sleeve 24
in the raised over the roadway position.
Self Contained Adjustable Support Assemblies
As illustrated throughout FIGS. 1 through 6, at each corner of
camper 12, a self contained adjustable support assembly 14 is
secured to camper 12. Preferably, a corner bracket 30 is well
fastened to the camper 12 to distribute the supporting loads into
the camper framing, not shown. At two or more locations spacing and
mounting tabs 32 are formed along corner bracket 30. Overlapping
tabs 34 are formed on guide sleeve 22. When the holes 36 of these
tabs 32, 34 are aligned, fastening assemblies 38, each having a
bolt 40 and nut 42, are used to firmly position guide sleeve 24
with respect to camper 12.
Each supporting leg 22 is sized to pass through guide sleeve 24
with limited clearance. Whenever interlock 18 is removed relative
movement occurs until the base plate 46 on leg 22 contacts the
ground. If hydraulic jack 16 is still installed, it will lower away
also and therefore it should be held.
The Adjustable Interlock of the Support Assemblies
The interlocking of supporting leg 22 and guide sleeve 22 is
undertaken at several selected locations by providing many pin
receiving holes 50 throughout supporting leg 22. Also during the
jacking operations these same holes are utilized to receive a
bottom load transfer pin 52. It is secured to a bottom plate 54
that inturn is fitted to the base 56 of hydraulic jack 16, as shown
in FIGS. 4, 5, and 7.
Once a selected location is determined by jacking or by hand
positioning of supporting leg 22 with respect guide sleeve 24, the
pin 58 of interlock assembly 18 is inserted through hole 60 in
sleeve 24 and beyond through the respective aligned hole 50 in
supporting leg 22. Pin 58 is supported and guided by bracket 64
that is secured to sleeve 24. Pin 58 has a turned end 66 serving as
a handle. It also has a circular flange to contact the end of
coiled spring 26 which keeps pin 58 in its interlock position until
intentionally withdrawn.
During intended relative movements between supporting leg 22 and
guide sleeve 24, by applying a retracting force at handle 66, pin
58 is withdrawn against the force of spring 26 until it is cleared
from hole 50 of leg 22, hole 60 of sleeve 24 and hole 70 in bracket
64. Thereafter, pin 58 is angled to one side while still kept in
hole 72 in bracket 64 and biased by spring 26 into contact with
bracket structure adjacent to hole 70. Once an interim or final
relative position is reached between supporting leg 22 and guide
sleeve 24, then pin 58 of interlock 18 is realigned and spring
biased back through holes 70, 60 and a selected hole 50, to thereby
lock them together once again as a supporting assembly.
Self Contained Hydraulic Jacking Assembly
As a manner of economy and practicality, and quick overall
operations, the self contained hydraulic jacking assembly 16 is
equipped with accessories to be removably fitted to each support
assembly. At the base 56 of hydraulic cylinder 76, a base plate 54
is secured and to it inturn is secured a load transfer pin 52
capable of closely fitting the holes 50 along leg 22.
No special fitting is secured directly to the piston 78 of
hydraulic jack 16. However, bracket 64 is preferably enlarged below
to form a receiver 80 into which piston 78 may be inserted, as
illustrated in FIGS. 1 through 5.
Therefore, at anytime hydraulic jack 18 is readily placed into a
jacking position or readily withdrawn when interlock 18 is actively
transferring part of the camper load between guide sleeve 24 and
supporting leg 22.
Operation of hydraulic jack 16 during height changes in undertaken
by using removable handle 20, as shown in FIG. 2. When not is use,
handle 20 and hydraulic jack 16 are carried inside the camper or
pickup.
Summary of Advantages
One person may safely and conveniently lower or raise a camper 12
with respect to a pickup 10 and to the ground, by operating a
hydraulic jack 16 throughout its major stroke, alternately, at the
respective corner located adjustable support assemblies 14, keeping
at least three support assemblies always mechanically locked by
interlock 18 to support the camper 12. Between trips of alternate
uses of a pickup 10 as a truck and as a recreational vehicle, the
camper 12 is conveniently raised and lowered, preferably, only a
limited distance in a very short time using the hydraulic jack 16
alternately at the respective corners of the camper 12. At all
transfer times, the camper 12 remains under control as at least
three interlocks 18 are always engaged. During the removed storage
times, camper 12 is firmly supported by all four adjustable support
assemblies 14.
After loading of camper 12 on pickup 10 and removal of hydraulic
jack 16, each adjustable support assembly 14, is very quickly well
cleared of the roadway by hand raising the supporting legs 22 up
through the guide sleeves and thereafter locking them again in
these retracted positions by using interlock 18. After the return
from a trip and conversion back to a pickup truck is wanted,
interlocks 18 are cleared and supporting legs are quickly dropped
to the ground, again saving much time in making the conversion from
recreational vehicle to a work vehicle and vice versa. Therefore,
the hydraulic jack 16 is only needed to clear camper 12 just above
pickup 10 during unloading, and to lower it just this short
distance during loading of camper 12 on pickup 10.
* * * * *