Patent US3892398A successfully refreshed from Google Patents.
US3892398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression spring
Assignee: Bridgestone Firestone Inc
•
Filing: 1974-02-01
•
Granted: 1975-07-01
•
Expires: 1994-02-01
Abstract
Abstract An elongate elastomeric vehicle compression spring having a curved body-exterior and incorporating parallel reinforcing cords, and having a surface enbracing a diminishing crosssectional area extending axially from the end of the body. The surface is in the shape of a truncated cone or curved, extending axially away from the end of the body, or into the body, and it may be located at one end or at both ends of the spring. The cross-section of the spring thus presents increasing amounts of rubber, as well as increasing resistance, to an increasing load.
Inventors
- 👤 Gerald Leonard Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:09
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/373; F16F1/3732; F16F1/371; F16F2224/00; F16F2224/02; F16F2224/0241; F16F2236/00; F16F2236/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
228 words
A compression spring comprising a hollow body of elastomeric material having a height to width ratio of approximately two to one in unstressed condition, said body having a substantially cylindrical configuration throughout the major portion of its height, and having at at least one end a shaped portion of diminishing cross-section and having an outer surface inclined at an angle to the major axis of said body, reinforcing means extending axially of said body at least coextensive in height with the height of said cylindrical configuration and comprising at least two layers of elastomer coated cords integrally bonded layer to layer and to said body, the cords of each layer being parallel to one another and extending at an angle to the major axis of said body with the angular relationship of the cords of one layer being opposite to that of the cords in the other layer whereby in response to compressive force exerted in a direction parallel to the major axis of said body, the elastomeric material of said shaped portion takes up the initial compressive force as the height of said body is decreased and said reinforcing means having such a bonded relationship with said body as to resist radial expansion to such an extent that the major portion of said body retains its substantially cylindrical configuration up to loads of at least 70,000 pounds.
Claim 2
Dependent Claim
228 words
A compression spring comprising a hollow body of elastomeric material having a height to width ratio of approximately two to one in unstressed condition, said body having a substantially cylindrical configuration throughout the major portion of its height, and having at at least one end a shaped portion of diminishing cross-section and having an outer surface inclined at an angle to the major axis of said body, reinforcing means extending axially of said body at least coextensive in height with the height of said cylindrical configuration and comprising at least two layers of elastomer coated cords integrally bonded layer to layer and to said body, the cords of each layer being parallel to one another and extending at an angle to the major axis of said body with the angular relationship of the cords of one layer being opposite to that of the cords in the other layer whereby in response to compressive force exerted in a direction parallel to the major axis of said body, the elastomeric material of said shaped portion takes up the initial compressive force as the height of said body is decreased and said reinforcing means having such a bonded relationship with said body as to resist radial expansion to such an extent that the major portion of said body retains its substantially cylindrical configuration up to loads of at least 70,000 pounds.
Claim 3
Dependent Claim
18 words
The compression spring as claimed in claim 1 and said outer surface of said shaped portion being frusto-conical.
Claim 4
Dependent Claim
37 words
The compression spring as claimed in claim 1 and said body having shaped portions at its opposite ends, said shaped portions extending axially beyond said reinforcing means and said outer surfaces of said shaped portions being frusto-conical.
Claim 5
Dependent Claim
10 words
The spring of claim 1, wherein said surface is flared.
Claim 6
Dependent Claim
15 words
The spring of claim 1, wherein said surface extends axially inwardly of said reinforcing means.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |