US4821598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steering wheel core material
Assignee: Toyota Motor Corp
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Filing: 1987-11-03
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Granted: 1989-04-18
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Expires: 2007-11-03
Abstract
Abstract A steering wheel core material of continuous filament FRP for vehicles which is made up of a ring, a boss positioned at the center of the ring, and spokes connecting the boss to the ring, said boss being integrally joined to a boss metal fitting. It is formed by winding resin-impregnated continous filaments in layer around the ring- and spoke-forming mold and the body of the boss metal fitting, with an elastic material interposed between the body of the boss metal fitting and the FRP.
Inventors
- 👤 Yasushi Yamazawa
- 👤 Katsumi Kondo
- 👤 Yasuhiro Tsuchiya
- 👤 Shinji Koike
- 👤 Masaki Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:15
CPC Classifications
B; B62; B62D; B62D1/00; B62D1/02; B62D1/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481; Y10T29/49488; Y10T428/00; Y10T428/21; Y10T428/218; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T428/24628; Y10T428/24661; Y10T428/24744; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20834
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A laminated FRP steering wheel core material formed by winding resin-impregnated continuous filaments in layer around the ring- and spoke-forming mold and the body of the boss metal fitting positioned at the center of the ring, characterized in that an elastic material is interposed between the body of the boss metal fitting and the resin-impregnated continuous filaments wound around the body of the boss metal fitting.
Claim 2
Dependent Claim
66 words
A laminated FRP steering wheel core material formed by winding resin-impregnated continuous filaments in layer around the ring- and spoke-forming mold and the body of the boss metal fitting positioned at the center of the ring, characterized in that an elastic material is interposed between the body of the boss metal fitting and the resin-impregnated continuous filaments wound around the body of the boss metal fitting.
Claim 3
Dependent Claim
40 words
A steering wheel core material as claimed in claim 1, wherein the boss metal fitting has flat surfaces on the body thereof and an elastic material is interposed between the body and the resin-impregnated continuous filaments wound around the body.
Claim 4
Dependent Claim
39 words
A steering wheel core material as claimed in claim 1, wherein the boss metal fitting has grooves on the body thereof and an elastic material is interposed between the body and the resin-impregnated continuous filaments wound around the body.
Claim 5
Dependent Claim
39 words
A steering wheel core material as claimed in claim 1, wherein the boss metal fitting has pins on the body thereof and an elastic material is interposed between the body and the resin-impregnated continuous filaments wound around the body.
Claim 6
Dependent Claim
84 words
A steering wheel core material as claimed in claim 1, wherein the boss metal fitting is made up of an inner member connected to the steering shaft and an outer member around which the resin-impregnated continuous filaments are wound, said inner member having flat surfaces on the external periphery of the body thereof and said outer member having flat surfaces on the internal periphery of the body thereof, and the gap between said inner member and outer member is filled with an elastic material.
Claim 7
Dependent Claim
79 words
A steering wheel core material as claimed in claim 1, wherein the boss metal fitting is made up of an inner member connected to the steering shaft and an outer member around which the resin-impregnated continuous filaments are wound, either of said inner member or outer member having projecting parts and the other having recessed parts which loosely mate with said projecting parts, and the gap between said inner member and outer member is filled with an elastic material.
Claim 8
Dependent Claim
27 words
A steering wheel core material as claimed in any of claims 1 to 6, wherein the elastic material has a torsional rigidity of 30 to 300 N.m/rad.
Claim 9
Dependent Claim
30 words
A steering wheel core material as claimed in any of claims 1 to 6 wherein the elastic material is selected from the group of rubber, synthetic resin, air, and oil.
References Cited (Backward Citations)
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |