Patent US3765038A successfully refreshed from Google Patents.
US3765038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic spring assembly connected to a support tray
Assignee: Hercules LLC
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Filing: 1972-05-17
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Granted: 1973-10-16
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Expires: 1992-05-17
Abstract
Abstract Corrugated plastic springs are substituted for metal coil springs in a chair, sofa, or the like. An annular flange is at the bottom of the spring and has a radial slot therein. A base tray support has a plurality of openings for receiving a respective spring therein. Each opening has a radial slot merging thereinto. One may insert the flange into the base tray slot and insert the edge of an opening into the slot on the flange and rotate the spring until the entire flange has proceeded under the base tray to provide a connection between the spring and base tray. A flexible spacer member is provided to keep the springs spaced from each other. The spacer member has a plurality of openings each receiving a top of a respective one of the springs therethrough.
Inventors
- 👤 W Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:36
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/24; A47C23/00; A47C23/002; A47C7/34; A47C7/347; F; F16; F16F; F16F1/00; F16F1/36; F16F1/42; F16F1/422; F16F1/424; F16F2236/00; F16F2236/02; F16F2236/022; Y; Y10; Y10S; Y10S297/00; Y10S297/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
A spring assembly comprising a base member having a plurality of generally circular openings therein, a plurality of corrugated tubular springs having a portion thereof extending through said openings, said portion being a peripheral radially outwardly extending flange, said flange having a slot therein extending to the outer periphery thereof and being at least as wide as the thickness of the edge of said openings, said openings each having a radially slotted portion the width of said portion being at least the thickness of said flange and the length of said portion being at least the width of said flange, said slot and said slotted portion permitting the attachment of said spring to said base member.
Claim 2
Dependent Claim
116 words
A spring assembly comprising a base member having a plurality of generally circular openings therein, a plurality of corrugated tubular springs having a portion thereof extending through said openings, said portion being a peripheral radially outwardly extending flange, said flange having a slot therein extending to the outer periphery thereof and being at least as wide as the thickness of the edge of said openings, said openings each having a radially slotted portion the width of said portion being at least the thickness of said flange and the length of said portion being at least the width of said flange, said slot and said slotted portion permitting the attachment of said spring to said base member.
Claim 3
Dependent Claim
73 words
A spring assembly as recited in claim 1 further comprising a flexible sheet having openings therein receiving the tops of a respective one of said springs therethrough, means for retaining said tops of said springs in said openings, said base member being supported by frame means, said sheet being sufficiently flexible to allow compression of any spring relative to the other spring and rigid enough to prevent the springs from abutting each other.
Claim 4
Dependent Claim
16 words
The spring assembly as recited in claim 1 wherein said assembly is located in a chair.
Claim 5
Dependent Claim
16 words
The spring assembly as recited in claim 1 wherein said assembly is located in a sofa.
Claim 6
Dependent Claim
41 words
A spring comprising: a corrugated tubular wall terminating at a peripheral Radially outwardly extending flange at the bottom thereof, a slot in said flange extending to the outer periphery thereof and having a length equal to the width of said flange.
Claim 7
Dependent Claim
41 words
A spring comprising: a corrugated tubular wall terminating at a peripheral Radially outwardly extending flange at the bottom thereof, a slot in said flange extending to the outer periphery thereof and having a length equal to the width of said flange.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |