US4874154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated spring assembly for reclining furniture
Assignee: ACUSHNET RUBBER COMPANY Inc A MA Corp
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Filing: 1989-02-23
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Granted: 1989-10-17
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Expires: 2009-02-23
Abstract
Abstract An improved spring with a compression-type, helical spring in which a dowel member is inserted is disclosed. The dowel member can be a solid metal dowel having a length approximately equal to the length of the spring when fully compressed and having a diameter equal to the internal diameter of the spring. The compression-type, helical spring is preferably an encapsulated spring.
Inventors
- 👤 Paul J. Zimbone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:37
CPC Classifications
F; F16; F16F; F16F3/00; F16F3/08; F16F3/10; F16F3/12; Y; Y10; Y10S; Y10S297/00; Y10S297/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
In reclining furniture having a reclining mechanism for providing resistance during periods of movement of said reclining furniture wherein a spring assembly is used in said reclining mechanism to provide said resistance, the improvement in said spring assembly comprising: an encapsulated helical spring, encapsulated in a polymeric material to provide constant force during periods of compression and expansion of said helical spring in said reclining mechanism of said reclining furniture, said encapsulated helical spring having a hollow internal area, said hollow internal area having an inner diameter, said encapsulated spring having an effective length; and a rigid dowel member inserted in said hollow internal area, said rigid dowel member having an outer diameter substantially equal to the inner diameter of said hollow internal area, said rigid dowel member having a length no greater than the effective length of said encapsulated spring.
Claim 2
Dependent Claim
141 words
In reclining furniture having a reclining mechanism for providing resistance during periods of movement of said reclining furniture wherein a spring assembly is used in said reclining mechanism to provide said resistance, the improvement in said spring assembly comprising: an encapsulated helical spring, encapsulated in a polymeric material to provide constant force during periods of compression and expansion of said helical spring in said reclining mechanism of said reclining furniture, said encapsulated helical spring having a hollow internal area, said hollow internal area having an inner diameter, said encapsulated spring having an effective length; and a rigid dowel member inserted in said hollow internal area, said rigid dowel member having an outer diameter substantially equal to the inner diameter of said hollow internal area, said rigid dowel member having a length no greater than the effective length of said encapsulated spring.
Claim 3
Dependent Claim
13 words
The encapsulated spring assembly of claim 1 wherein said polymeric material is polyurethane.
Claim 4
Dependent Claim
17 words
The encapsulated spring assembly of claim 1 wherein each end of said rigid dowel member is tapered.
Claim 5
Dependent Claim
20 words
The encapsulated spring assembly of claim 1 wherein said rigid dowel member has an external cross-sectional shape of a hexagon.
Claim 6
Dependent Claim
23 words
The encapsulated spring assembly of claim 1 wherein said rigid dowel member has a telescoping dowel member mounted in said rigid dowel member.
Claim 7
Dependent Claim
27 words
The encapsulated spring assembly of claim 1 wherein the rigid dowel member is substantially equal to the length of the spring when the spring is fully compressed.
Claim 8
Dependent Claim
22 words
The encapsulated spring assembly of claim 6 wherein said polymeric material is polyurethane and each end of said dowel member is tapered.
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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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |