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Патент USA US3025111

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March 13, 1962
R. c. MCKINNIE
3,025,101
AND STOOL
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3,025,101
their pivot points thereby scissoring the front and rear
legs together.
COMBINATION CHAIR AND STOOL
A better understanding of the invention as well as
Roxton C. McKinnie, 2435 Walgrove Ave.,
Los Angeies, Calif.
Filed Apr. 2, 1959, Ser. No. 803,644
1 Claim. (Cl. 297-56)
further features and advantages thereof will be had by
referring to a preferred embodiment as illustrated in the
accompanying drawings, in which:
FIGURE 1 is an overall perspective view of the com
This invention relates generally to utility type collap
bination chair and stool in its open or spread apart posi
sible furniture and more particularly to a combination
1.
3,®Z5,i0l
Patented Mar. 13, 1962
tion;
chair and stool preferably for domestic use.
10
FIGURE 2 is a side view taken in the direction of
Collapsible chairs per se are well known in the art.
the arrows 2-—2 of FIGURE 1 showing the chair and
Further, collapsible type stools of one or two steps are
stool in partially collapsed position; and,
also well known. Each structure has advantages peculiar
FIGURE 3 is a view similar to FIGURE 2 but show
to its particular use and the structural design of each is
ing the combination chair and stool in completely col
accordingly directed towards such use. As a consequence, 15 lapsed position.
interchanging the functions of a collapsible type chair
with a collapsible type stool is generally not practicable
and can even result in possible injury when the structure
Referring ?rst to FIGURE 1, the combination chair
and stool comprises a pair of front legs 10 and 11 and
a pair of rear legs 12 and 13. As shown, the front and
rear pairs of legs extend upwardly in crossed relationship
is not used in its intended manner. For example, to use
a collapsible card table type chair as a stool by standing 20 and are pivoted together at the cross over points as at
on the seat, can cause the seat to pivot about its mount~
14 and 15. The front legs extend upwardly above the
ing and collapse the chair. This pivoting action is a
cross over point and thence turn inwardly towards each
result of the seat itself being pivoted intermediate its
other to connect together as at 16. The upper ends of
front and rear edges. Unless the extreme front portion
the rear legs 12 and 13, on the other hand, terminate in
of the seat is employed as a standing area, automatic 25 engaging end portions 17 and 18 at a level lower than
collapse of the chair can occur.
the top end portions of the front legs 10 and 11.
In using a step stool as a chair, on the other hand,
A seat 19 has its rear edge portion pivoted at 20 and
there is lacking the advantage of a back rest for the user.
21 between the front legs 1t} and 11, respectively, above
In addition the seating area itself is usually much smaller
the cross over points of the legs. These pivot points are
than a conventional seat to the discomfort of the user. 30 at a level corresponding substantially to the level of the
With the foregoing in mind, it is a primary object of
end portions 17 and 18 of the rear legs so that the under
the present invention to provide a novel combination
side of the front portion of the seat 19 is supported by
these engaging ends of the rear legs in an horizontal posi
chair and stool which retains the advantages of each
separately to the end that a single structure can readily
serve both functions.
tion as shown.
35
Disposed below the cross over points of the legs is
a step 22 including rear pivoting means in the form of
Another important object is to provide a combination
chair and stool meeting the foregoing objects in which
rearwardly extending braces 23 and 24 pivoted at their
several elements of the structure serve two or more func
rear ends as at 25 and 26 to the rear legs 12 and 13
tions to the end that a minimum number of components
respectively. A cross bar 27 at a corresponding level
are required to ful?ll all of the desired functions with 40 to the rear pivot points is secured between the front legs
consequent simplicity, reliability, and savings in manufac
14} and 11 and engages the underside front portion of
the step 22 so that the step 22 extends in an horizontal
position as shown.
light, portable, collapsible combination chair and stool
As more clearly illustrated in FIGURE 2, there is pro
which stands by itself in either spread apart or collapsed 45 vided a spreader link 28 pivoted between the cross bar
position whereby storing and shipping are greatly facili
27 and a pivot point 29 located at an intermediate posi
tated.
tion on the rearwardly extending brace 23. When the
Brie?y, these and many other objects and advantages
step 22 is in its horizontal position as shown in FIGURE
of the present invention are attained by providing pairs
1, the spreader link 23 is substantially in parallel align
of crossed front and rear legs pivoted together at their 50 ment with the rearwardly extending brace 23 and thus
cross over points for scissoring movement from a first
serves to limit the maximum spread apart position of
the rear and front legs.
spread apart position to a second collapsed position. The
legs themselves are preferably formed of aluminum tub
In the particular embodiment chosen for illustrative
ing so that they are light and strong.
purposes, there is also provided an actuating link in the
The structure additionally includes a seat and a step 55 form of a bar 30 pivoted between the seat 19 and step
22 at corresponding sides. By this arrangement, pivot
respectively positioned above and below the cross over
ing movement of either the seat 19 or the step 22 will
points of the legs. The seat is pivoted at its extreme
be communicated to the other through the actuating link
rear edge between the front legs and the underside of
30.
the front portion of the seat rests on the upper end por
60
The structure may also include cross bracing as indi
tions of the rear legs when in the spread apart position
cated at 31 and 32 between the lower rear portions of
so that adequate support is provided. The upper ends
the legs 12 and 13 to hold these rear legs in spaced
of the front legs extend upwardly beyond the termination
parallel position.
points of the rear legs and turn inwardly towards each
From the foregoing description, the operation of the
other to connect together and thereby provide a back
65 combination chair and stool will be evident. In the
rest for the seat. The step itself includes pivoting means
position illustrated in FIGURE 1, the device can be
adjacent its rear end for pivoting between the rear legs
turing cost.
Still another object of the invention is to provide a
at a point below the cross over points and a simple cross
employed as either a chair or a stool.
When used as a
chair, the occupant simply sits on the relatively wide and
bar is secured between the front legs at a corresponding
comfortable seat 19, the inwardly turned connected ends
level to engage the under front portion of the step.
70 of the front legs 10 and 11 as at 16 providing conveni
By the foregoing arrangement, the entire structure may
ent back rest for the user. In addition, the step 22 may
be collapsed by simply pivoting the seat and step about
serve as a foot rest for any person seated on the seat 19.
3,025,101
3
When the device is to be employed as a stool, the
user may simply step on the step 22 and from the step
22, step to the seat 19. In this connection, the back rest
readily occur to those skilled in the art. The combina~
tion stool and chair is, therefore, not to be thought of
as limited to the particular embodiment shown and de
scribed for illustrative purposes.
What is claimed is:
portion 16 serves as a convenient gripping handle to
steady a person in climbing the step 22 and ultimately
onto the seat 19,
As a consequence of the pivoting of
the seat 19 at its extreme rear edges as at 20 and 21,
there is no possibility of the weight of the user on the
seat tending to cause the seat to pivot in a counter clock
wise direction. Thus, complete stability is assured.
When it is desired to store or ship the combination
chair and stool, either the seat 19 or the step 22 may be
4
Many other such minor variations that fall clearly
within the scope and spirit of the present invention will
A combination chair and stool comprising: pairs of
crossed front and rear legs pivoted together at their
cross-over points for scissoring movement from a ?rst
10
spread apart position to a second collapsed position, the
upper ends of said front legs extending to a higher level
than the upper ends of said rear legs and turning in
simply grasped by the hand and rotated in a counter
wardly towards each other to connect together; a seat
clockwise direction as viewed in FIGURE 1 upwardly.
having
its rear portion pivoted between said front legs
With particular reference to FIGURE 2, it will be noted 15
above said cross-over points and the under side of its
that the initial result of this pivoting action is simply
front portion resting on the upper end portions of said
to lift the seat 19 from the engaging ends 17 and 18 of
rear legs, said upper ends of said front legs at their
the rear legs and simultaneously through the action of
turned in connected portions serving as a back rest for
the actuating‘link 30 lift the step 22 from the cross bar
27, the spreader link 28 and brace 23 crooking at the 20 said seat when said legs are in said ?rst spread apart
position, and as a carrying‘handle when said legs are in
pivot point 29 as shown.
said second collapsed position; a lower step including
Continued counter-clockwise movement of the seat and
rearwardly
extending brace members pivoted to said rear
step results in the front and rear legs scissoring together
legs respectively at a level below said cross-over points,
to a collapsed position such as illustrated in FIGURE 3.
the vertical distance between said seat and lower step
The design of the structure is such that the center of
gravity of the combination chair and stool in collapsed 25 being at least as great as the vertical distance of said
lower step above the lower- ends of said legs; an horizon
position when upright as shown in FIGURE 3 falls
tal cross bar rigidly secured between said front legs at
between the lower ends of the front and rear legs so that
a corresponding level to the pivoting level of said braces
the structure will stand by itself. In this position, it
to engage and support the under side of said lower step,
will be evident that the turned in connected portion 16
of the upper front legs provides a very convenient carry 30 the front edge of said lower step extending forwardly
beyond the front edge of said seat; at least one spreader
ing handle.
link pivotally connected between said cross bar and an
From the foregoing description it will be evident that
intermediate position on at least one of said braces, said
link being parallel to said one of said braces when said
two or more functions. For example, the turned in
portions 16 at the upper ends of the front legs 10 and 35 front and rear legs are in said ?rst spread apart position
to limit the degree of spread of said front and rear legs,
11 not only serve as an easy carrying handle when the
said lower step serving as a foot rest for said seat, and
structure is collapsed as described in connection with
said connected portions of said upper ends of said front
FIGURE 3, but also provide a handle to hold onto when
legs also serving as a holding means to facilitate stepping
using the structure as a step stool. In addition, the
40 onto said lower step and stepping therefrom onto said
same structure serves as a back rest when the device
seat; and an actuating link pivotally connected to corre
is employed as a chair.
sponding portions of said seat and lower step forward of
The lower step 22 also serves several functions. First,
said cross over points whereby pivoting movement of
in co-operation with the spreader link 28, its rear brace
said seat and step upwardly takes place simultaneously,
portions constitute a spreader to limit the maximum
spread of the front and rear legs, Secondly, the step 45 and the center of gravity of said combination chair and
stool when vertically disposed in said second collapsed
serves its intended function of a lower step when the
position falling on a vertical line passing between the
structure is employed as a stool, and ?nally the same
lower ends of said front and rear legs, respectively,
step serves as a foot rest when the device is employed
many parts of the combination chair and stool perform
whereby said combination chair and stool stands by itself
as a chair.
While an actuating link 30 is provided so that either 50 when in said collapsed position.
the seat 19 or the step 22 can be rotated to eifect col
References Cited in the ?le of this patent
UNITED STATES PATENTS
lapsing or spreading out of the legs, it is not essential
to the invention. Thus, an equivalent structure could be
employed in the form of a spreader type link structure
between the upper engaging end 17 or 18 of the rear 55
legs and an intermediate portion of the underside of the
seat 19 between the ends 17, 18 of the rear legs and the
pivots 20, 21. With this structure and the actuating link
30 omitted, upward pivoting movement of the seat 19
would automatically cause the front and rear legs to 60
scissor together, this action in turn effecting pivoting
movement of the step 22 through the spreader link 28.
Further, if desired, the upper engaging ends 17 and 18
of the pair of rear legs 12 and 13 could be turned in
wardly and connected together in a manner similar to (i5
the top portion 16 of the front legs to provide a cross
bar portion for the underside forward portion of the
seat 19 to rest upon. In this case, further rigidity would
be provided between the rear legs 12 and 13 and the
gross braces 31 and 32 could be eliminated,
70
100,219
207,764
Verity _______________ __ Feb. 22, 1870
Mitchell _____________ __ Sept. 3, 1878
950,469
1,023,671
1,806,502
1,817,760
2,685,325
2,777,503
Barth ________________ __ Mar. 1, 1910
Moore ______________ __ Apr. 16, 1912
Rosenberg ___________ __ May 19, 1931
Peters et al. __________ __ Aug. 4, 1931
Webster _____________ __ Aug. 3, 1954
Grace _______________ __ Ian. 15, 1957
FOREIGN PATENTS
431,860
917,995
Great Britain _________ __ July 10, 1935
1,032,291
France _____________ __ Sept. 30, 1946
France _____________ __ Mar. 16, 1955
1,103,090
France ______________ __ May 18, 1955
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