Patent US3610686A successfully refreshed from Google Patents.
US3610686A
Expired / Lapsed
US
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Cast-aluminum stack chair
Assignee: Shelby Williams Industries Inc
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Filing: 1969-10-10
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Granted: 1971-10-05
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Expires: 1989-10-10
Abstract
Abstract A chair capable of being stacked for storage and releasably coupled or ganged in side-by-side relation forming a row of like chairs each having a seat assembly mounted in a cantilever fashion to a base assembly. The base assembly includes a pair of substantially identical leg units; one leg unit provides the two front legs of the chair and the other unit provides the two rear legs of the chair. The legs of each pair are joined at their upper ends to an intermediate horizontal crossmember thereby forming the leg unit; the crossmembers of the two leg units are secured in back-to-back relation so as to form the base assembly. Mating slots are provided in the abutted crossmembers so as to form a mortise joint when the base is assembled. The seat assembly includes two identical L-shaped frame members between which are disposed and to which are secured a backrest and seat. The seat assembly is mounted to the base assembly by means of a tongue or tenon adapted to fit into the mortise joint and which depends from a horizontally oriented section of each L-shaped frame member. The chair is assembled by inserting the tenons of the seat assembly into the mortises provided in the base assembly. A hole can be drilled through the crossmembers and the mortise and tenon joint so that appropriate mechanical fasteners can be inserted for firmly securing the seat assembly to the base assembly. The facing or opposed surfaces of the front and rear legs of each chair have stacking bosses provided thereon each having a horizontally oriented bottom surface. A plastic insert is installed on each leg to cover said bottom surface. Upon stacking of a pair of chairs, the plastic insert of the upper chair will engage upon the shoulder of the lower chair to prevent a metal-to-metal contact between the chairs which could mar or scratch the chairs'' finishes. A plurality of chairs may be coupled in side-by-side relation by providing a slot in the under portion of the shoulder of one chair in which can be engaged a crosshead of a connector member which projects outwardly from the side of an adjacent chair.
Inventors
- 👤 Jerome Carmel Caruso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:42
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/12; A47C1/124; A47C3/00; A47C3/04; A47C4/00; A47C4/02; A47C4/03
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
193 words
A chair frame assembly comprising, a base frame and a seat frame; a. said base frame comprising a pair of similar integral leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formations at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being arranged in back-to-back relation along abutting inner faces of the crossmembers; b. the seat frame comprising a pair of similar L-shaped integral frame members adapted to mount i. a seat between horizontally oriented sections of the frame members and ii. a backrest between vertically oriented sections of the frame members; and c. means for mounting the seat frame to the base frame, said means including said crossmembers having at least a pair of upwardly opening mortises on opposite sides of said opposed inner faces thereof and said seat frame members each having an integral depending tenon matingly engageable in a said mortise for holding same upright on the base frame in position to mount said seat and backrest.
Claim 2
Dependent Claim
193 words
A chair frame assembly comprising, a base frame and a seat frame; a. said base frame comprising a pair of similar integral leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formations at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being arranged in back-to-back relation along abutting inner faces of the crossmembers; b. the seat frame comprising a pair of similar L-shaped integral frame members adapted to mount i. a seat between horizontally oriented sections of the frame members and ii. a backrest between vertically oriented sections of the frame members; and c. means for mounting the seat frame to the base frame, said means including said crossmembers having at least a pair of upwardly opening mortises on opposite sides of said opposed inner faces thereof and said seat frame members each having an integral depending tenon matingly engageable in a said mortise for holding same upright on the base frame in position to mount said seat and backrest.
Claim 3
Dependent Claim
21 words
The assembly as recited in claim 1 in which said leg units and L-shaped frame members respectively are integral, cast-metal members.
Claim 4
Dependent Claim
21 words
The assembly as recited in claim 1 wherein the leg units are assembled together by mechanical fasteners engaged with the crossmembers.
Claim 5
Dependent Claim
31 words
The assembly as recited in claim 1 wherein the cross members are concave in cross section and the seat is of conforming configuration for mounting thereon in a cantilever-type support position.
Claim 6
Dependent Claim
23 words
The assembly as recited in claim 4 wherein the width of the frame assembly is less than the width of the base frame.
Claim 7
Dependent Claim
38 words
The assembly as recited in claim 1 wherein the width of the seat is less than that of the base and the seat frame is mounted to the base frame inside the shoulder formations with said formations exposed.
Claim 8
Dependent Claim
15 words
The assembly as recited in claim 1 wherein the leg unit is a unitary piece.
Claim 9
Dependent Claim
16 words
The assembly as recited in claim 1 wherein the L-shaped frame member is a unitary piece.
Claim 10
Dependent Claim
36 words
The assembly as recited in claim 1 wherein the base frame has a pair of ganging slots provided in the underside of the shoulder formations, and I-shaped crosshead connector members are engaged in said ganging slots.
Claim 11
Dependent Claim
20 words
The assembly as recited in claim 9 wherein said connector members are resiliently and releasably engaged in the ganging slots.
Claim 12
Dependent Claim
23 words
The assembly as recited in claim 1 having at least one vertical support member secured to the base frame at a side thereof.
Claim 13
Dependent Claim
18 words
The assembly as recited in claim 1 wherein at least one armrest is secured to said vertical support.
Claim 14
Dependent Claim
18 words
The assembly as recited in claim 1 wherein a writing table attachment is mounted to the support member.
Claim 15
Dependent Claim
26 words
The assembly as claimed in claim 1 in which said mounting means include means to hold said crossmembers together with the tenons engaged in said mortises.
Claim 16
Dependent Claim
28 words
The assembly as claimed in claim 14 in which said last-named means cooperate with said tenons and mortises for holding said inner faces together in said abutting relationship.
Claim 17
Dependent Claim
35 words
The assembly as recited in claim 5 wherein a plurality of stacking bosses is provided, one boss projecting from each leg toward the opposed leg and each boss having a horizontal surface for stacking contact.
Claim 18
Dependent Claim
66 words
The assembly as recited in claim 16 wherein the stacking bosses are arranged to contact the upper surfaces of the leg shoulder formation of a lower assembly upon which said assembly is stacked such that when the assemblies are stacked, a space is provided between the seat and seat frame member of the lower assembly and the lower surface of the cRossmember of the upper assembly.
Claim 19
Dependent Claim
171 words
A chair comprising, a base assembly and a seat assembly; a. said base assembly including a pair of similar leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formation at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being secured in back-to-back relation along opposed inner faces of the crossmembers; iv. said crossmembers having mortise means; b. the seat assembly having a pair of similar L-shaped frame members including, i. a seat mounted between horizontally oriented sections of the frame members and ii. a backrest mounted between vertically oriented sections of the frame members; iii. depending tenon means matingly engaged in said mortise means for supporting the seat assembly upright on the base assembly; and c. the seat assembly being secured to the base assembly by means of a fastener passing through each said crossmember and tenon means.
Claim 20
Dependent Claim
171 words
A chair comprising, a base assembly and a seat assembly; a. said base assembly including a pair of similar leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formation at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being secured in back-to-back relation along opposed inner faces of the crossmembers; iv. said crossmembers having mortise means; b. the seat assembly having a pair of similar L-shaped frame members including, i. a seat mounted between horizontally oriented sections of the frame members and ii. a backrest mounted between vertically oriented sections of the frame members; iii. depending tenon means matingly engaged in said mortise means for supporting the seat assembly upright on the base assembly; and c. the seat assembly being secured to the base assembly by means of a fastener passing through each said crossmember and tenon means.
Claim 21
Dependent Claim
171 words
A chair comprising, a base assembly and a seat assembly; a. said base assembly including a pair of similar leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formations at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being secured in back-to-back relation along opposed inner faces of the crossmembers; b. the seat assembly having a pair of similar L-shaped frame members and including, i. a seat mounted between horizontally oriented sections of the frame members and ii. a backrest mounted between vertically oriented sections of the frame members; c. means for mounting the seat assembly to the base assembly; and d. said base assembly having a pair of ganging slots provided in the underside of the shoulder formations, each ganging slot being provided with a reentrant angle, and I-shaped crosshead connector members engaged in said ganging slots.
Claim 22
Dependent Claim
171 words
A chair comprising, a base assembly and a seat assembly; a. said base assembly including a pair of similar leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formations at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being secured in back-to-back relation along opposed inner faces of the crossmembers; b. the seat assembly having a pair of similar L-shaped frame members and including, i. a seat mounted between horizontally oriented sections of the frame members and ii. a backrest mounted between vertically oriented sections of the frame members; c. means for mounting the seat assembly to the base assembly; and d. said base assembly having a pair of ganging slots provided in the underside of the shoulder formations, each ganging slot being provided with a reentrant angle, and I-shaped crosshead connector members engaged in said ganging slots.
Claim 23
Dependent Claim
43 words
The chair as recited in claim 19 wherein one end of the crosshead is tapered and shaped to matingly engage the ganging slot and be secured therein and the other end is untapered and of a size to slidably engage the ganging slot.
Claim 24
Dependent Claim
221 words
A chair comprising, a base assembly and a seat assembly; a. said base assembly including a pair of similar leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formations at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being secured in back-to-back relation along opposed inner faces of the crossmembers; b. the seat assembly having a pair of similar L-shaped frame members and including, i. a seat mounted between horizontally oriented sections of the frame members and ii. a backrest mounted between vertically oriented sections of the frame members; and c. means for mounting the seat assembly to the base assembly. d. the base assembly having at least one vertical support member secured thereto at a side thereof, said vertical support member having, at its lower end, an integral inwardly projecting connecting head, having an ''''I'''' shape and a downwardly tapered end flange, and said base assembly having at least one ganging slot in the underside of the leg shoulder formation, said slot having a reentrant angle and adapted to engage the tapered end of the connecting head thereby securing the support member outboard of the base assembly.
Claim 25
Dependent Claim
221 words
A chair comprising, a base assembly and a seat assembly; a. said base assembly including a pair of similar leg units each of which comprises; i. a pair of legs joined to a crossmember at shoulder formations at the upper ends of said legs; ii. the crossmember having an inner face from which said legs are canted downwardly and in a direction away from the inner face; iii. the leg units being secured in back-to-back relation along opposed inner faces of the crossmembers; b. the seat assembly having a pair of similar L-shaped frame members and including, i. a seat mounted between horizontally oriented sections of the frame members and ii. a backrest mounted between vertically oriented sections of the frame members; and c. means for mounting the seat assembly to the base assembly. d. the base assembly having at least one vertical support member secured thereto at a side thereof, said vertical support member having, at its lower end, an integral inwardly projecting connecting head, having an ''''I'''' shape and a downwardly tapered end flange, and said base assembly having at least one ganging slot in the underside of the leg shoulder formation, said slot having a reentrant angle and adapted to engage the tapered end of the connecting head thereby securing the support member outboard of the base assembly.
Claim 26
Dependent Claim
22 words
The chair as recited in claim 21 wherein the support member has a downwardly opening ganging slot provided in its lower end.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |