U.S. patent number 3,638,588 [Application Number 04/877,941] was granted by the patent office on 1972-02-01 for collapsible stool.
Invention is credited to Bobby R. Abbott.
United States Patent |
3,638,588 |
Abbott |
February 1, 1972 |
COLLAPSIBLE STOOL
Abstract
A plurality of part-cylindrical legs are pivotally joined to a
like plurality of struts so that the legs and struts extend away
from each other in diverging directions for respectively resting on
the earth and supporting a seat. When the struts are in a collapsed
position they form a cylindrical seat nesting tube telescopically
received by the tube formed by the legs when collapsed.
Inventors: |
Abbott; Bobby R. (Oklahoma
City, OK) |
Family
ID: |
25371046 |
Appl.
No.: |
04/877,941 |
Filed: |
November 19, 1969 |
Current U.S.
Class: |
108/128; 248/435;
297/17 |
Current CPC
Class: |
A47C
9/105 (20130101) |
Current International
Class: |
A47C
9/00 (20060101); A47C 9/10 (20060101); A47c
004/30 () |
Field of
Search: |
;297/17,16
;248/165,166,434,435,432,155.4,155.2,155.1 ;108/118,128 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Zugel; Francis K.
Claims
I claim:
1. A collapsible stool, comprising:
a first tubular member longitudinally divided to form a plurality
of legs,
each said leg having a longitudinally extending tongue groove
formed in its inwardly disposed surface;
a second tubular member telescopingly received by said first
tubular member and being longitudinally divided to form a like
plurality of struts;
a T-shaped tongue secured to the outer surface of the depending end
portion of each said strut slidably received by the respective
tongue groove;
means connecting each said strut with a respective one of said legs
permitting upwardly diverging movement of said struts when disposed
above said legs;
ring means surrounding and holding one end portion of said legs and
said struts together and permitting downwardly diverging movement
of said legs; and,
a fabric seat secured to the upper end portion of said struts.
2. Structure as specified in claim 1 in which the upper end portion
of each said leg is bifurcated to form an upwardly open slot for
nesting an intermediate portion of each respective said strut,
and
a lug secured to the depending end portion of each said strut,
said lugs each having convergent side surfaces contiguously
contacting like surfaces of adjacent lugs when said struts are
disposed in said second tubular member forming position,
said lugs each having divergent depending end surfaces contacting
like end surfaces of the next adjacent juxtaposed lugs when said
struts are disposed in upwardly diverging seat-forming
position.
3. Structure as specified in claim 2 in which each said strut and
said leg is provided with laterally open recesses forming opposing
shoulders, perpendicular to the longitudinal axis of the strut, for
engaging the inner surfaces of the respective bifurcated end
portion of said legs in strut supporting relation.
4. Structure as specified in claim 3 and further including:
resilient means connected with said fabric seat and at least one
said strut for collapsing said fabric seat toward a folded position
when said struts are pivoted toward said second tubular member
forming position.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to stoollike supports and more
particularly to a folding or collapsible stool.
While camping or attending sporting events, or the like it is
desirable to have available some means for forming a seat or
stoollike support. For convenience it is desirable that such a
stool be easily transported which is best accomplished by forming
the stool so that it may be collapsed. One of the requirements of a
collapsible stool is that it be relatively light in weight and
occupy a minimum of space when collapsed. The small space feature
is accomplished by forming the stool in sections so that one
section is telescopically received by the other section.
2. Description of the Prior Art
Folding or collapsible stools are shown by U.S. Pat. Nos. 661,036;
1,355,944; 2,736,366 and 1,545,054.
The principal distinction of this invention over the stools shown
by these patents is that all of its components remain
interconnected while not in use and when folded or collapsed to a
carrying position, thus eliminating the necessity of assembly and
disassembly of its parts.
SUMMARY OF THE INVENTION
The stool comprises a plurality of part-cylindrical legs forming an
outer cylindrical tube when in collapsed position which
telescopically receives a like plurality of part-cylindrical struts
forming an inner tube when in collapsed position. In its stool
forming position the upper ends of the legs are surrounded by a
retaining ring with the depending end of the legs contacting the
earth in diverging relation. The plurality of struts, when
telescopically extended with their depending ends arranged in
abutting relation adjacent the upper limit of the legs, are
pivotally connected with the respective upper end portion of the
legs by a tongue and groove means so that the struts diverge
upwardly and horizontally support a fabric seat. The stool is
collapsed by pivoting the upper end portion of the struts toward
each other wherein the seat is nested within the confines of the
struts. The struts and seat are then telescopically received by the
outer cylindrical tube formed by the legs when they are moved
toward each other. A removable cap, enclosing the depending end
portion of the legs, cooperates with a ring in maintaining the
stool in collapsed position.
The principal object of the present invention is to provide a
relatively small compact seat or stool when in collapsed position
which may be easily expanded to form a seatlike support.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary elevational view of the stool in collapsed
position;
FIG. 2 is a horizontal cross-sectional view, to a larger scale,
taken substantially along the line 2--2 of FIG. 1;
FIG. 3 is an elevational view, to a different scale, of two opposed
legs and struts in stool forming position illustrating, by dotted
lines, the collapsed telescopically extended position of the legs
and struts;
FIG. 4 is a top view with portions of the seat broken away for
clarity;
FIG. 5 is a fragmentary perspective view, to another scale, of one
strut and its supporting leg in stool forming position;
FIG. 6 is a fragmentary perspective view, to an enlarged scale, of
the upper end portion of one leg; and,
FIG. 7 is a fragmentary perspective view of the depending end
portion of one strut rotated, about its longitudinal axis, to
illustrate the tongue formed on its outer surface.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Like characters of reference designate like parts in those figures
of the drawings in which they occur.
In the drawings:
The reference numeral 10 indicates the device, as a whole, which is
cylindricallike when in its collapsed position comprising a
cylindrical leg section 12 which telescopically receives a
cylindrical strut section 14. The depending end of the leg section
12, as viewed in FIG. 1, is surrounded by a cap 16 while the upper
end portion of the leg section 12 is loosely surrounded by a
retaining ring 18. The leg section 12 comprises a plurality of
part-cylindrical legs 20, three in the example shown, formed by
longitudinally splitting or dividing a tube section so that the
respective longitudinal side edges of the legs 20 are arranged in
contiguous contact, as shown in FIG. 1. The retaining ring 18 is
secured to each leg 20 by a loop or eye 22. The depending end of
the inner surface of each of the legs 20 is secured to a segment 24
of an end plate formed by dividing the end plate in thirds. Each of
the legs 20 is provided with a longitudinally extending inwardly
spaced liner 26 which is imbedded at one end portion into the end
segment 24 with its other end portion arcuately curved, as at 28,
and joined to the inner surface of the leg adjacent its upwardly
disposed end. The liner is longitudinally divided to form a guide
slot 30 for the reasons presently explained. The upper end portion
of each leg is bifurcated to form a support slot 32 extending
longitudinally from its free end to the juncture of the liner 28
with the inner surface of the leg providing communication between
the slots 30 and 32.
The strut section 14 comprises a like plurality of similarly formed
part-cylindrical elongated struts 34 having a length slightly less
than the length of the legs 20. The depending end portion of each
of the struts 34 is secured to a longitudinally extending segmental
lug 36 having beveled edges cooperatively and contiguously
contacting each other when the struts 34 are positioned together in
cylindrical tube forming position. The depending end portion of the
lugs 36 is divergingly beveled, as at 38, for cooperative
engagement with like oppositely disposed surfaces of the lugs on
the other struts. Opposing sides of the lugs 36 and the strut are
provided with longitudinally extending recesses 40 forming opposing
shoulders 42, for inserting the lug into the support slot 32, as
shown in FIG. 5, wherein the inner surface of the bifurcated end of
the leg contacts the shoulders 42 in supporting relation. The outer
surface of each strut is provided with a T-shaped tongue 44 which
is connected to its end portion between the shoulders 42 and its
adjacent end. The tongue 44 is slidably received by the liner slot
30 with the crossbar of the T-shaped tongue slidably received in
the spacing between the inner surface of the legs 20 and the
adjacent surface of the liner 26. The tongue assists the bifurcated
end of the leg and shoulders 42 in limiting the diverging relation
of the struts 34 and pivotally connects the strut to the leg. A
spring member 45, connected with the strut adjacent the tongue 44,
bears against the liner 26 tending to pivot the struts 34 toward
their seat-forming diverging relation.
The upper free end portion of each strut 34 is provided with a plug
segment 46 which is secured to the inner surface of the strut. The
plug segment 46 is transversely apertured for receiving a flexible
cord 48 which has secured thereto a section of fabric material
forming a seat 50. The central portion of the seat 50 is connected
to one of the lugs 36 by resilient means such as a spring 52 for
the purposes presently explained.
Each of the side edge surfaces of the strut 34 is longitudinally
cut away, as at 54, to form a longitudinally extending slot 56 when
the struts 34 are in a collapsed position for the reasons presently
explained.
OPERATION
In operation the device is expanded to stool position from its
collapsed position of FIG. 1 by manually removing the cap 16 and
telescopically extending the struts 14 to the position shown by
dotted lines FIG. 3, wherein the springs 45 tend to pivot the
struts outwardly in diverging relation, as shown by solid lines
(FIGS. 3 and 4) with the outwardly diverging movement limited by
the tongues 44 within the liner slots 30 and the horizontally
expanded position of the seat 50. The legs 20 are manually
positioned in downwardly diverging relation with such movement
being limited by the tongues 44 and contact of the bifurcated ends
of the legs with the lug shoulders 42. The ring 18, surrounding the
upper end portions of the legs, maintains them in contact with the
lug shoulder 42. The seat is then ready for use.
The stool is collapsed by manually pivoting the struts 34 toward
each other wherein the resilient member 52 pulls the central
portion of the seat toward the lugs 36 for a folded position of the
seat to be encompassed by the struts when folded together. Small
portions of the seat may protrude through the strut slots 56 thus
insuring complete contiguous contact of the lug segments 36 and
plug segments 46. The seat-folding action is further assured by a
resilient member, such as a rubber strand 57, secured in series to
the plug segments 46, tending to draw the seat-supporting ends of
the struts together. A pin 58, secured to one surface of each strut
segment 36, enters a cooperating socket 60 formed in the adjacent
surface of the respective juxtaposed segment 36 to lock the
depending end portion of the struts together when in collapsed
position. The strut section 14 is then telescopically inserted into
the outer tube forming leg section 12 which is achieved by manually
moving the legs 20 toward each other to be surrounded, at their
depending end portions, by the cap 16.
Obviously the invention is susceptible to changes or alterations
without defeating its practicability, therefore, I do not wish to
be confined to the preferred embodiment shown in the drawings and
described herein.
* * * * *