U.S. patent number 3,648,628 [Application Number 05/101,059] was granted by the patent office on 1972-03-14 for wall mounted expansible table.
Invention is credited to Donald A. Davis.
United States Patent |
3,648,628 |
Davis |
March 14, 1972 |
WALL MOUNTED EXPANSIBLE TABLE
Abstract
An expansible table supported from a vertical surface and
movable between a collapsed position adjacent said surface to an
expanded generally horizontal position. The table comprises a
plurality of pivotally connected table sections and a cleat member
pivotally connected to one of such sections. The cleat member can
be pivoted to a position extending under all of the table sections
when the latter are unfolded, with support legs being pivotally
mounted on the cleat member for supporting the table when fully
expanded.
Inventors: |
Davis; Donald A. (Winchester,
MA) |
Family
ID: |
22282892 |
Appl.
No.: |
05/101,059 |
Filed: |
December 23, 1970 |
Current U.S.
Class: |
108/33; 108/63;
108/73; 108/65 |
Current CPC
Class: |
A47B
5/06 (20130101); A47B 3/0803 (20130101) |
Current International
Class: |
A47B
5/00 (20060101); A47B 5/06 (20060101); B65d
003/00 () |
Field of
Search: |
;108/33,36,63,65,73,42,13 ;312/277 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: McCall; James T.
Assistant Examiner: Finch; Glenn O.
Claims
I claim:
1. An expansible table adapted to be supported from a vertical
support surface and movable between a collapsed position contiguous
said surface and an expanded position extending generally normal to
said vertical support surface, comprising:
a. a support member fixed to and extending laterally from said
vertical support surface,
b. a first table section pivotally connected to said lateral
support member and hanging vertically downwardly when said table is
collapsed,
c. a second table section pivotally connected to the other end of
said first section and extending generally normal to said first
section and said support surface when said table is collapsed,
d. a third table section pivotally connected to the opposite end of
said second section and disposed contiguous said support surface
when said table is collapsed,
e. a cleat member contiguous and pivotally connected to said third
table section on the side thereof remote from said support surface,
said cleat member being disposed wholly within the confines of said
third table section when said table is collapsed and being adapted
to be pivoted to a position extending under said first and second
table sections when said table is moved to an open position wherein
said table sections are in a plane generally normal to said support
surface, and
f. a pair of leg members pivotally mounted on said cleat member and
movable between a closed position contiguous and within the
confines of said cleat member when said table is collapsed to an
open, support position when said cleat has been pivoted to a
position transverse to said table sections for supporting the same
in planar relation.
2. The table of claim 1 wherein said first and third table sections
are substantially equal in length and said second section is
generally equal in length to said fixed support member thereby to
provide a compact table when collapsed.
3. The table of claim 2 further including a front ledge portion
fixed to the free end of said third table section and providing a
front ledge portion extending downwardly from said third table
section when said table is in an expanded position.
4. The table of claim 1 wherein each of said legs is pivotally
mounted on said cleat member by means of a bracket mounted
relatively adjacent the opposed ends of said cleat member, said
brackets being mounted on opposed sides of the longitudinal center
line of said cleat member thereby to permit folding of said legs to
a collapsed position contiguous said cleat member and wholly within
the confines thereof.
5. The table of claim 4 wherein said cleat member is substantially
as long as the width of said third table section, the pivot point
for said cleat member being generally intermediate the width of
said third table section and spaced from the inner edge of said
third table section a distance approximately equal to the width of
said cleat member, whereby one end of said cleat member and the leg
carried thereby extends under said first table section for directly
supporting the same when said leg is moved to an open, support
position.
6. The table of claim 1 wherein said pivoted connections between
the several table sections and between the first table section and
said fixed support member comprises a spring mounted detent carried
by one of said pivotally connected members and a cylindrical sleeve
carried by the other for receiving said detent.
7. The table of claim 1 wherein said pivotal connections between
the several table sections and between the first table section and
said fixed support member comprises a continuous hinge mounted on
the adjacent ends of said sections.
Description
BACKGROUND OF THE INVENTION
The present invention relates as indicated to an expansible table
and more particularly to a table which can be mounted on a vertical
support surface for movement between a collapsed position in which
it occupies very little storage space and an expanded position
providing a substantial table top surface. The term "vertical
support surface" as used herein may include a wall, as shown in the
application drawings, or a comparable fixed vertical surface such
as provided, for example, by one side of a desk, a cabinet, or the
like.
Tables which extend and fold away are of course desirable from the
standpoint of saving much needed space, and tables of this type
have taken on many forms in the past. By way of example but not
limitation, reference is directed to U.S. Pat. Nos. 1,532,996;
2,672,384 and 3,072,453, all of which show tables which can be
folded away and stored in an article of furniture, such as a
cabinet or the like, or suspended vertically against the supporting
surface, an arrangement shown in the mentioned U.S. Pat. No.
1,532,996.
Prior art tables of this type have not been wholly satisfactory for
a number of reasons. Frequently, the mechanism employed either for
folding the table or for supporting the same when expanded, or
both, is relatively complex and thus costly. A further problem
presented in prior art arrangements is the provision of
sufficiently strong support means when the table is expanded
without greatly sacrificing much needed space when the table is
folded or collapsed. Leg support is of course a common method of
supporting the table when open, but with a multisection table the
space required for leg storage presents a problem. As a result, the
table when expanded is frequently supported only at its hinged and
outer ends, thereby leaving the midportion without firm support.
Where the table sections are numerous and/or the table is used to
support relatively heavy objects when open, the lack of firm
support may present limitations on the use of the table.
SUMMARY OF THE INVENTION
With the above in mind, the primary object of the present invention
is to provide an expansible table which can be mounted on a
vertical support surface for movement between a collapsed, stored
position and an extended, open position. The unfolding of the table
can be effected simply and quickly, and without the need for tools
or other equipment. Although the table of the present invention can
be used in essentially any environment where space is of
considerable importance, the table can be used to particular
advantage in environments such as scientific laboratories and the
like. With construction costs ever increasing, laboratory space is
becoming correspondingly more expensive and tables constructed in
accordance with the present invention permits maximum utilization
of the space when the table are collapsed. Where class discussions
or critiques are scheduled, at the end of a laboratory session, for
example, one or more tables can be expanded to an open position and
the students and instructor positioned therearound.
A further object of the present invention is to provide an
expansible table the design of which permits the table to require a
minimum of space when collapsed but which at the same time provides
firm support for the table when expanded to an open position.
A more specific object of the invention is to provide an expansible
table in which the supporting legs when folded and stored require a
minimum of space but which can be pivoted to a position generally
parallel to the longitudinal axis of the table when expanded,
thereby giving the table firm support in the intermediate portion
thereof as well as at its hinged and open ends.
A still further object of the present invention is to provide a
table which is inexpensive to manufacture but pleasing in
appearance, and which can be provided with a top surface adaptable
to the conditions of use. In scientific laboratories, for example,
the table sections can be provided with a chemically resistant top
surface.
Other objects of the present invention will become apparent as the
following description proceeds, in particular reference to the
application drawings.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 comprises a top plan view of the invention with the table
shown in an open or fully expanded position, with the legs being
positioned to provide maximum support;
FIG. 2 is a side elevational view of the table when in its FIG. 1
expanded position;
FIG. 3 is a sectional view illustrating the table in a collapsed
position, and further showing in dash lines the manner in which the
table is unfolded to an expanded position;
FIG. 4 is a fragmentary sectional view similar to the top portion
of FIG. 3, showing an alternative hinging arrangement;
FIG. 5 is a sectional view taken on line 5--5 of FIG. 1 showing the
preferred form of pivotal connection between the table sections,
and
FIG. 6 is a sectional view taken on line 6--6 of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings, wherein like parts are indicated by
like reference numerals, the table of the present invention is
generally indicated at 10 and the construction thereof is best seen
in FIG. 3. The table 10 comprises a rigid back plate 12 which is
adapted to be mounted on the vertical supporting surface 14, which
in the form shown comprises a wall. The plate can be attached to
the wall in any suitable manner, such as by fasteners, hangers or
the like.
Rigidly attached to the top of the back plate 12 is a ledge 16
which extends perpendicular to the wall 14. The ledge 16 can be
permanently secured to the back plate 12 in any suitable
manner.
The folding sections of the table comprise first, second and third
table sections indicated at 18, 20 and 22, respectively. The first
table section 18 is pivotally connected by means of pin 24 to the
outer end of the ledge 16. Similarly, the intermediate table
section 20 is pivotally connected by pin 26 to the adjacent end of
the table section 18, and the third section 22 is pivotally
connected by pin 28 to the adjacent end of the intermediate section
20. In the form shown, the free end of the third table section 22
has mounted thereon a front ledge member 30 which extends
downwardly when the table is fully open, as shown in FIG. 2.
Fastener members 32 or the like, preferably hidden rigidly mount
the ledge 30 to the table section 22.
Referring to FIG. 5, there is illustrated therein the preferred
form of pivotal connection between the several table sections, with
FIG. 5 illustrating the pivotal connection between the intermediate
table section 20 and the third table section 22. It will be
understood, however, that the pivotal connection shown in FIG. 5 is
exemplary of the pivotal connections between the other table
sections.
The pin 28 includes a base portion 34 which is slidable within a
cylindrical sleeve 36 mounted in an opening 38 therefor in the
table section 22. A coil spring 40 biases the pin 28 outwardly, as
shown in FIG. 5.
A pin receiving sleeve 42 is mounted in an opening 44 provided
therefor in the intermediate table section 20, with the table
sections 20 and 22 when thus assembled permitting pivotal movement
of the third table section 22 about the intermediate table section
20 about the longitudinal axis of the pin 28.
A cleat member 50 is pivotally connected to the third table section
22 by a pivot pin 52. The cleat member 50 can be rotated from its
stored position as shown in FIG. 3, in which the cleat member 50 is
oriented generally parallel to the pivot pins 28 and wholly within
the confines of the third table section 22, to a position shown in
FIG. 1, in which the cleat member 50, shown in dash lines in this
figure, extends generally perpendicular to the pins 28 and
generally parallel to the length of the expanded table. It will be
noted that when the cleat member is in its dash line, FIG. 1
position, the member extends beneath both the intermediate table
section 20 and the adjacent end of the first table section 18.
A pair of brackets 54 and 56 are fixedly mounted on the underside
of the cleat member 50 on either side of a longitudinal plane
through the pin 52 of the cleat member. Legs 58 and 60,
respectively, are pivotally mounted by pins commonly designated at
62 to the brackets 54 and 56 for folding movement between their
stored position, as shown in FIG. 3, and their open, support
position as shown in FIG. 2. The direction of folding of the legs
58 and 60 is shown in dash lines in FIG. 2.
The bottom of each leg 58 and 60 is preferably provided with an
adjusting foot commonly designated at 64 for the purpose of
achieving a perpendicular relationship between the table when
expanded as shown in FIG. 2 and the vertical supporting surface
14.
As shown in the application drawings, the table sections, the top
ledge 16, and the back plate 12 are constructed of wood, and where
the table is likely to be exposed to materials harmful thereto, the
table sections can be provided with a plastic laminate top surface,
as commonly shown at 70. It will be understood that any suitable,
commercially available plastic or other type protective material
can be employed, and that the wood can likewise be selected from
commercially available types.
Referring to FIG. 6, each table section, with table section 22
being shown in this figure, is formed with a peripheral dressed
edge 72 which may be rabbited to the adjacent phase of the table
section, as shown in this figure. Normally plywood material, due to
its availability and cost, is employed for the main body portion of
the table sections, and when such plywood is covered by the plastic
laminate 70 and edged by the dressing member 72, a highly
attractive top table surface is provided.
It will further be noted that the table sections at their adjoining
ends are offset to accommodate the pivotal connections
therebetween. In this manner, the third table section 22 can be
pivotally mounted about the intermediate section 20, and the latter
about the first table section 18 without interference. In lieu of
the pivotal connection shown in FIG. 5, the adjoining edges of the
several table sections may be formed planar, and the edges
connected by continuous hinges of the type shown at 74 in FIG.
4.
To briefly redescribe the mounting and use of the table constructed
in accordance with the present invention, the table can be mounted
on any suitable vertical support surface in the manner shown in
FIG. 3. The table can conveniently be preassembled and shipped in
the collapsed position shown in this figure. To mount the table on
the vertical support surface, the back plate 12 need only be
fastened to or hung from the support surface 14. In such collapsed
position, the table takes up a minimum of space.
To move the table to an open position, the first table section 18
is grasped and moved upwardly into its dash line, FIG. 3 position.
The intermediate section 20 and the third table section 22 can then
be pivoted to a generally horizontal position, as shown in FIG. 2.
The cleat member 50 is thereafter rotated to its FIG. 1 position
wherein it extends lengthwise of the table and beneath all three
table sections. The legs 58 and 60 can then be folded downwardly
into their FIG. 2 position thereby supporting the table in its
fully open position.
It will be understood that the dimensions of the table may vary
considerably depending upon the ultimate use thereof. By way of
example, the table illustrated in the drawings is approximately 4-4
1/2 feet long when fully open, and is positioned at normal table
height above the supporting surface, slightly less than 30 inches.
The width of the table shown is approximately 20-24 inches. It will
thus be seen that the table when open provides an extensive working
surface which is firmly supported throughout its length and thus
capable of sustaining fairly heavy loading.
To fold or collapse the table, the reverse procedure is followed.
The legs 58 and 60 are folded to a closed position against cleat
member 50, and the latter is then rotated 90 degrees from its dash
line position in FIG. 1 to a position wholly within the dimensions
of the third table section 22, thereby permitting pivotal movement
of this section about the intermediate section 20. When fully
collapsed, the table reassumes its FIG. 3 position.
It will thus be seen that the present invention provides a table
which is simple in construction and economical to manufacture. The
table can be folded and unfolded in a minimum amount of time, and
the mounting of the leg members on the pivoted cleat provides firm
support for the table when expanded while at the same time
permitting folding of the table to a collapsed position taking up
very little space.
* * * * *