US3766580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic spring assembly connected to wire frame
Assignee: Hercules LLC
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Filing: 1972-05-17
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Granted: 1973-10-23
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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. The bottom of the spring is provided with spaced apart wire retaining means for connecting the springs to the wires. The retaining means are so located that the wires, which have been constructed perpendicular to each other, are bent out of a perpendicular relationship and impart opposite rotational forces on the spring, providing for a secure connection therebetween. The tops of the springs are held in such a manner that each spring may be compressed independently of each other and may move laterally to the extent that they do not abut each other.
Inventors
- 👤 W Curtis
- 👤 D Trimble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:33
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/282; A47C23/00; A47C23/002; A47C23/30; A47C23/32; A47C27/00; A47C27/04; A47C27/045; A47C27/0453; A47C27/06; A47C27/065; A47C7/34; 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: 8
Claim 1
Independent Claim
151 words
A spring assembly comprising: a frame having four side members, said frame having a first plurality of wire members spaced from each other extending between and connected to opposite side members, a second plurality of wire members spaced from each other extending between and connected to the other two opposite side members, said second plurality of wire members being perpendicular to said first plurality of wire members, all of said wire members being generally in the same plane at their points of intersection; and a spring having a corrugated tubular wall and a bottom wall, said bottom wall having two wire retaining means, contacting a wire member from said first plurality and a wire member from said second plurality of wire members forcing the angle of intersection of said two wire members to other than 90*, said two wire members exerting opposite rotational forces on said spring to hold said spring.
Claim 2
Dependent Claim
151 words
A spring assembly comprising: a frame having four side members, said frame having a first plurality of wire members spaced from each other extending between and connected to opposite side members, a second plurality of wire members spaced from each other extending between and connected to the other two opposite side members, said second plurality of wire members being perpendicular to said first plurality of wire members, all of said wire members being generally in the same plane at their points of intersection; and a spring having a corrugated tubular wall and a bottom wall, said bottom wall having two wire retaining means, contacting a wire member from said first plurality and a wire member from said second plurality of wire members forcing the angle of intersection of said two wire members to other than 90*, said two wire members exerting opposite rotational forces on said spring to hold said spring.
Claim 3
Dependent Claim
50 words
A spring assembly as recited in claim 1 wherein said wire retaining means comprises two pie-shaped raised abutment shoulder portions, the sides of said portions being separated by an angle greater than 90*, said portions being symmetrically located with respect to each other about the longitudinal axis of said spring.
Claim 4
Dependent Claim
54 words
The structure as recited in claim 1 wherein the tops of each spring are intercoNnected by a flexible sheet connected to said frame, said sheet being connected to said frame in such a manner as to allow compression of any spring relative to the other spring and prevent the springs from abutting each other.
Claim 5
Dependent Claim
16 words
The spring assembly as recited in claim 1 wherein said assembly is located in a chair.
Claim 6
Dependent Claim
16 words
The spring assembly as recited in claim 1 wherein said assembly is located in a sofa.
Claim 7
Dependent Claim
94 words
A spring comprising: a corrugated tubular wall and bottom wall having two spaced apart pie-shaped raised sections symmetrically spaced with respect to each other about the longitudinal axis of said tubular wall, the sides of each pie-shaped section including two abutment faces, said abutment faces angularly spaced from each other by more than 90*, whereby said abutment faces will contact support wires previously at right angles to each other and will move said wires out of their original constructed position thereby exerting opposite rotational forces on said springs to secure spring to said wires.
Claim 8
Dependent Claim
94 words
A spring comprising: a corrugated tubular wall and bottom wall having two spaced apart pie-shaped raised sections symmetrically spaced with respect to each other about the longitudinal axis of said tubular wall, the sides of each pie-shaped section including two abutment faces, said abutment faces angularly spaced from each other by more than 90*, whereby said abutment faces will contact support wires previously at right angles to each other and will move said wires out of their original constructed position thereby exerting opposite rotational forces on said springs to secure spring to said wires.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |