Patent US4475723A successfully refreshed from Google Patents.
US4475723A
Expired / Lapsed
US
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Elongated spring member
Assignee: WK 55 Inc
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Filing: 1982-04-28
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Granted: 1984-10-09
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Expires: 2002-04-28
Abstract
Abstract An elongated spring member is formed of fiber reinforced plastics, particularly resin-impregnated glass fiber strands, and includes end provisions adjacent the two ends for the reception of attachment elements associated with the use of the spring. The spring includes parallel impregnated strands which have been wound about a rack provided with end supports following which the entire wound resinous product is placed within a mold cavity and cured to provide a spring member having integral, molded end provisions encircled by continuous, uncut reinforcing fibers with or without the inclusion of additional reinforcing material, and which is molded without the formation of any significant waste product. The improved spring member includes transversely disposed end provisions which may comprise a passageway or elongated end members encircled by the reinforced strands and the center axis thereof may be along the neutral axis of the spring body or alternatively, above or below the neutral axis.
Inventors
- 👤 Leonard S. Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:36
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/366; F16F1/368; F16F1/3683; F16F1/3686
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
188 words
An elongated spring member formed of strands comprising resin impregnated reinforcing fibers including, a medial portion bounded by opposite terminal portions having distal tips, said medial and terminal portions defining a unitary spring member, an end provision adjacent each of said tips, said end provision each including a transverse bore adjacent said terminal portion tips completely encircled by said strands, said strands disposed substantially parallel to one another and extending longitudinally of said member medial and terminal portions, with the exception of said end provision bores said spring member comprising a solid mass of said strands, said medial portion comprising areas having a greater thickness and lesser width relative said terminal portions with a constant cross-sectional area of said mass of strands throughout the longitudinal extent of said medial portion and at least a substantial extent of said terminal portions, and said strands extending in a continuous uninterrupted manner from one said terminal portion tip through said medial portion then encircling said end provision bore at the other said terminal portion tip and returning through said medial portion to encircle said bore of said one terminal portion tip.
Claim 2
Dependent Claim
188 words
An elongated spring member formed of strands comprising resin impregnated reinforcing fibers including, a medial portion bounded by opposite terminal portions having distal tips, said medial and terminal portions defining a unitary spring member, an end provision adjacent each of said tips, said end provision each including a transverse bore adjacent said terminal portion tips completely encircled by said strands, said strands disposed substantially parallel to one another and extending longitudinally of said member medial and terminal portions, with the exception of said end provision bores said spring member comprising a solid mass of said strands, said medial portion comprising areas having a greater thickness and lesser width relative said terminal portions with a constant cross-sectional area of said mass of strands throughout the longitudinal extent of said medial portion and at least a substantial extent of said terminal portions, and said strands extending in a continuous uninterrupted manner from one said terminal portion tip through said medial portion then encircling said end provision bore at the other said terminal portion tip and returning through said medial portion to encircle said bore of said one terminal portion tip.
Claim 3
Dependent Claim
20 words
An elongated spring member according to claim 1 wherein, said end provision includes an elongated element through said transverse bore.
Claim 4
Dependent Claim
22 words
An elongated spring member according to claim 1 wherein, said spring member in an at-rest condition is bowed between said distal tips.
Claim 5
Dependent Claim
27 words
An elongated spring member according to claim 1 wherein, the longitudinal axis of said end provision is disposed substantially along the neutral axis of said spring member.
Claim 6
Dependent Claim
26 words
An elongated spring member according to claim 1 wherein, the longitudinal axis of said end provision is disposed above the neutral axis of said spring member.
Claim 7
Dependent Claim
26 words
An elongated spring member according to claim 1 wherein, the longitudinal axis of said end provision is disposed below the neutral axis of said spring member.
Claim 8
Dependent Claim
18 words
An elongated spring member according to claim 1 wherein, said member tip includes a vertical cut-out portion therethrough.
Claim 9
Dependent Claim
20 words
An elongated spring member according to claim 1 including, a fiber layer substantially surrounding said bore and beneath said strands.
Claim 10
Dependent Claim
17 words
An elongated spring member according to claim 2 wherein, said end provision elongated element comprises a sleeve.
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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) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |