U.S. patent number 3,796,456 [Application Number 05/239,592] was granted by the patent office on 1974-03-12 for ladder and platform assembly.
Invention is credited to Larry K. Arnot, Lyle L. Bergeson.
United States Patent |
3,796,456 |
Bergeson , et al. |
March 12, 1974 |
LADDER AND PLATFORM ASSEMBLY
Abstract
A ladder and platform assembly is disclosed for utilization with
conventional rear-access campers. The assembly comprises a fixed
rectangular frame having two opposed side channels forming a track
for a movable rectangular frame. The movable frame includes two
opposed side rails slidably mounted within the side channels of the
fixed frame. The movable frame also includes a pair of parallel
lateral beams located at the rearward end thereof for supporting a
platform section. Upon installation, the movable frame is adapted
to slide along the side channels to enable the platform section to
extend out of the rearward end of the camper, directly below the
entryway. The movable frame also includes a center rail extending
longitudinally along the movable frame. The ladder comprises a
rectangular carriage having two sides that are adapted to slide
within the frame side rails and the center rail. The ladder further
includes a first pair of side rails pivotally connected to the
forward end of the carriage and a second pair of side rails
pivotally connected to the rearward end of the carriage. A
plurality of rectangular step sections are pivotally connected at
their corners to the two pairs of ladder side rails. During
retraction, the ladder carriage is moved forwardly and the ladder
side rails and steps are pivoted upwardly to lie flush within the
movable frame. During extension, after the movable frame is
extended rearwardly to expose the platfrom section, the ladder
carriage is moved rearwardly and the ladder side rails and steps
are pivoted downwardly until the bottom extremities of the ladder
contacts the ground.
Inventors: |
Bergeson; Lyle L. (Arcadia,
CA), Arnot; Larry K. (Duarte, CA) |
Family
ID: |
22902836 |
Appl.
No.: |
05/239,592 |
Filed: |
March 30, 1972 |
Current U.S.
Class: |
296/156; 182/88;
280/163 |
Current CPC
Class: |
B60R
3/02 (20130101) |
Current International
Class: |
B60R
3/02 (20060101); B60R 3/00 (20060101); B60p
003/34 () |
Field of
Search: |
;296/23R,23MC,26
;280/163,164R,166 ;182/84,88 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Schonberg; David
Assistant Examiner: Carroll; John A.
Attorney, Agent or Firm: Jackson & Jones Law
Corporation
Claims
1. A storable ladder assembly capable of being used in camper
vehicles comprising:
a pair of longitudinal tracks for mounting beneath the floor
section of the vehicle;
a movable frame slidably mounted between said pair of tracks,
includes two side longitudinal rails which are slidable within said
tracks, a pair of cross beams interconnecting the ends of said side
longitudinal rails and a third longitudinal rail located between
said first two longitudinal rails, one end of said frame having a
platform section formed thereon which is adapted to slide outwardly
beyond said tracks to extend outwardly from the camper; and
a ladder member comprising a carriage slidably mounted within said
frame, said carriage having a pair of lateral side members which
are adapted to slide within either of said movable frame's two side
longitudinal rails and said third longitudinal rail, at least two
ladder side rails pivotally connected to each side member, said
side rails having at least one step section pivotally mounted at
each corner to respectively a ladder side rail, said carriage
adapted to slide toward the end of the frame forming the platform
section to enable the ladder side rails to pivot downwardly to
contact the ground, said carriage further adapted to slide away
from the end of the frame forming the platform section to enable
the ladder
2. The invention of claim 1 wherein said longitudinal tracks
comprises a
3. The invention of claim 2 wherein said C-shaped channels are
connected at their ends to a pair of cross bars to form an
integrally structured unit.
4. The invention of claim 1 wherein said side two longitudinal
rails comprise a pair of C-shaped rails and said third longitudinal
rail comprises an I-shaped rail located equidistant between said
C-shaped
5. The invention of claim 4 wherein the lateral sides of said
carriage includes wheel means rotatably mounted thereon for riding
within the
6. A storable ladder assembly for vehicles having a floor support
member comprising:
a pair of longitudinal tracks capable of being mounted beneath said
support member of said vehicle;
a carriage having a pair of side members movably mounted between
said pair of longitudinal tracks and a support platform means
extending at least between said side members of said carriage for
facilitating egress and entrance to the vehicle;
a pair of ladder side rails pivotally connected to each side
member; and
at least one step support section interconnected between said
ladder side rails, the mounting arrangement of said carriage
permitting it to move towards one end of said tracks to enable said
ladder side rails to pivot downwardly to contact the ground and
place the step support section in an operative position while
movement of the carriage towards the other end of said tracks
permits said ladder side rails to pivot upwardly into a
7. The invention of claim 6 wherein said longitudinal tracks
comprises a
8. The invention of claim 7 wherein said C-shaped channels are
connected at their ends to a pair of cross bars to form an
integrally structured unit.
9. The invention of claim 6 wherein said step support section is
pivotally
10. The invention of claim 9 wherein a second step support member
is connected to said ladder side rails.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a ladder and platform assembly
that is especially adapted to be installed under the entryways of
campers.
2. Description of the Prior Art
In recent years, record numbers of campers and related equipment
have been sold. It is believed that the reason for this upsurge is
that people are striving to get away from the smog and crowded
conditions of today's cities for their leisure. However, as
evidenced by the exotic interior designs of many of the campers,
the public does not wish to leave all of the conveniences of home
to endure the hardships of outdoor living. Today's campers are
equiped with many modern conveniences such as running water,
built-in stoves and refrigerators, tub or shower units, radios and
televisions and many more.
Although the exterior design of campers has improved somewhat in
recent years, nearly all of the campers suffer from a serious
shortcoming that is a major annoyance to the users. This
shortcoming relates to the ease (or the lack) of access to the
interiors of the campers. In many campers, especially those camper
models that are adapted to be mounted on truck beds, the entry
doors are located a few feet above ground level. Most of these
camper-truck combinations have a single step mounted directly below
the door in the form of a small ramp or a part of the bumper.
However, this step does not extend out a sufficient distance to be
used easily. Many other camper-truck combinations do not provide
any steps at all and the people must fend for themselves in
attempting to enter the campers.
One manufacturer has attampted to overcome this problem by
producing a short ladder that is adapted to be hung on the bumper
of the truck when in use. However, it has been found that the
ladder is not universally adapted for all campers. Moreover, such
ladders cannot be easily stowed when not in operation. As a result,
the utilization of such a ladder is quite cumbersome.
A problem encountered in attempting to utilize any type of ladder
is that the ground level upon which the ladder rests can vary a
very large amount. A great advantage of campers is that they can
travel and alight on any type of terrain and on any slope of
terrain. However, because of this, present day ladders for campers
are usually one step devices that hang straight down, directly
below the camper doorway.
SUMMARY OF THE INVENTION
The present invention obviates the above-mentioned shortcomings by
providing a ladder and platform assembly for campers that can be
efficiently utilized on any type of terrain.
In its broadest aspect, the ladder and platform apparatus form a
movable frame slidably mounted within a pair of side channels. The
frame includes a platform section mounted on the one end thereof. A
ladder is foldably enclosed within the frame and includes a
plurality of side rails pivotally mounted at the upper extremities
to a carriage slidably mounted within the frame.
An important advantage of the present invention is that the
assembly provided a platform of sufficient size to enable one
entering or exiting the camper to easily stand on the platform
while maneuvering the door.
Another advantage of the present invention is that the platform
section can be extended from the rear of the camper alone or in
conjunction with the ladder.
Still another advantage of the present invention is that the ladder
can be pivoted to be grounded on any level of terrain.
A further important advantage of the present invention is that the
ladder is retractable to lie flush within the movable frame and the
whole assembly can lie within a two inch high compartment below the
camper.
Another important advantage of the present invention is that the
retracting and extending procedures can be accomplished easily and
efficiently.
The features of the present invention which are believed to be
novel are set forth with particularity in the appended claims. The
present invention, both as to its organization and manner of
operation, together with further objects and advantages thereof,
may best be understood by reference to the following description,
taken in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a conventional camper utilizing the
ladder and platform assembly of the present invention, shown in an
operable position;
FIG. 2 is a fragmentary perspective view of the assembly of the
present invention, shown with the ladder retracted and the platform
fully extended;
FIG. 3 is a fragmentary perspective view of the ladder-platform
assembly in its fully stowed position; and
FIG. 4 is a perspective view of the ladder-platform assembly prior
to installation under the camper.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings, FIG. 1 illustrates a ladder and
platform assembly, generally indicated by arrow 10, which is
adapted to be mounted below the floor section of a conventional
camper module 11. As with campers of this type, the module 11 is
adapted to be supported on the bed 12 of a camper or pickup truck
13. The camper 11 includes a rear entryway 14 having a door 15
pivotally mounted thereon. Because of the closeness of space inside
the camper 11, the door 15 is adapted to swing outwardly.
The assembly 10 includes a platform sub-assembly generally
indicated by arrow 20, and a ladder sub-assembly, generally
indicated by arrow 30. FIG. 1 shows the assembly 10 with the
platform 20 and the ladder 30 fully extended. As will be more fully
described hereinafter, the ladder 30 can be retracted under the
camper 11 independently of the platform 20. FIG. 2 shows such a
mode. FIG. 3 shows the assembly 10 with both the platform 20 and
the ladder 30 retracted beneath the camper 11.
Referring now to FIG. 4, the assembly 10 comprises a fixed
rectangular frame 16 having a pair of opposed side channels 17
connected at their end by a pair of cross bars 18 and 19. The side
channels 17 are C-shaped with the open sides thereof facing each
other to form a pair of tracks for receiving the platform assembly
20. The frame 16 (and entire assembly) can either be placed on the
bed 12 of the truck 13 prior to mounting the camper module 11
thereon, or the frame 16 can be permanently attached beneath the
floor section of the module 11, to be installed and removed as a
unit with the module 11.
The platform assembly 20 comprises a movable rectangular frame
having a pair of opposed side rails 21 interconnected at the ends
by a pair of cross beams 22 and 23. An expanded metal grating 25
may be welded or otherwise fastened to the frame members 21, 22,
and 23 to complete the platform. If desired, the platform assembly
may be cast, e.g., of aluminum with spaced apertures therein to
provide a sturdy, lightweight platform. The side rails 21 of the
platform assembly 20 are adapted to be slidably mounted within the
side channels 17 in order to slidingly extend out of the rear end
thereof. A third cross beam 24 is also connected to the side rails
21 near the rear ends thereof in order to form a support for the
platform 20.
A third longitudinal rail 26 is located within the movable frame
and is connected at its ends to the front and rear cross beams 22
and 23. The rail 26 is located equidistant the side rails 21 and is
in the form of an I-shape member with the open sides facing the
side rails 21 to form a pair of tracks.
The ladder assembly 30 comprises a rectangular carriage 31 that is
adapted to be slidably mounted within either side of the movable
frame. The carriage 31 includes a pair of lateral members 32 and a
pair of side members 33 all interconnected to form a rectangular
frame. Each side member 33 has a pair of wheels 34 rotatively
mounted thereon. The wheels are adapted to ride within either of
the tracks formed by the side rails 21 or the center rails 26,
depending on which side of the movable frame the carriage 31 is
located.
The ladder 30 is further formed by a first pair of ladder rails 35
pivotally connected to the forward end of the carriage 31 and
second pair of ladder rails 36 pivotally connected to the forward
end of the carriage 31. A plurality of step sections 37 are
interconnected at their corners to the ladder rails 35 and 36. The
step sections may be of a construction similar to the platform
assembly 20, e.g., cast aluminum or expanded metal welded to a
rectangular frame.
Referring back to FIG. 1, the ladder 30 is shown in its extended
position. In this position, the carriage 31 is located at the
rearward end of the movable platform frame and the ladder rails 35
and 36 are pivoted downwardly to enable the ends of the rails 35 to
contact the ground. It should be noted that because of the
configuration of the ladder rails 35 and 36, the step sections 37
are always located parallel to the ground. This is true no matter
what the angular position of the ladder rails 35 and 36. Because of
this, the ladder 30 can be positioned vertically or at any angular
position up to the rearward horizontal position. The position, of
course, is dependent on the ground level.
In order to retract the ladder 30, the lower extremities thereof
are lifted and the carriage 31 is rolled in to the forward end of
the movable frame. As this occurs, the ladder rails 35 and 36,
along with the step sections 37 are adapted to collapse in a single
plane and be positioned within the movable frame.
The platform 20 can remain extended from the camper 11, as shown in
FIG. 2, or the platform 20 can also be retracted by moving the
movable frame inwardly. (See FIG. 3). An important advantage of
this embodiment is that the retracted assembly only utilizes
approximately a two inch high space beneath the camper.
To extend either of the sub-assemblies, the reverse procedure is
carried out.
As can be seen, a completely novel ladder and platform assembly is
provided for campers that is easy to operate and advantageous to
use.
It should be noted that various modifications can be made to the
apparatus while still remaining within the purview of the following
claims.
* * * * *