US3964582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan drive hydraulic coupling
Assignee: Eljer Manufacturing Inc
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Filing: 1974-07-26
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Granted: 1976-06-22
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Expires: 1994-07-26
Abstract
Abstract A fan drive structure for the cooling system of an internal combustion engine. A drive disc rotates within a housing cavity having a silicone oil therein. The housing carries a fan. The improvement comprising coating the sides of the drive disc with a polyphenylene sulfide material. The material coating functions as an anti-friction and bearing surface.
Inventors
- 👤 Roland J. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:37
CPC Classifications
F; F16; F16D; F16D35/00; F16D35/02; F16D35/021; F16D35/022; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31533
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A shear type hydraulic coupling adapted for use in the cooling system of an internal combustion engine, a housing having a cavity therein containing a shear fluid, a drive disc adapted to be rotated by an engine, said drive disc positioned within said cavity to transmit torque from the disc through the shear fluid to the housing, the housing adapted to carry a fan, a portion of the sides of said drive disc being contiguous to at least a portion of the interior surfaces of said housing cavity, the improvement comprising, a polyarylene sulfide material coating on at least a portion of the sides of said drive disc.
Claim 2
Dependent Claim
108 words
A shear type hydraulic coupling adapted for use in the cooling system of an internal combustion engine, a housing having a cavity therein containing a shear fluid, a drive disc adapted to be rotated by an engine, said drive disc positioned within said cavity to transmit torque from the disc through the shear fluid to the housing, the housing adapted to carry a fan, a portion of the sides of said drive disc being contiguous to at least a portion of the interior surfaces of said housing cavity, the improvement comprising, a polyarylene sulfide material coating on at least a portion of the sides of said drive disc.
Claim 3
Dependent Claim
11 words
The coupling of claim 1 wherein said material includes a filler.
Claim 4
Dependent Claim
28 words
The coupling of claim 2 wherein said filler is glass beads, glass powder, glass fibers, polytetrafluoroethylene powder, Molybdenum sulfide powders, TiO 2 powder, metallic particles, or asbestos fibers.
Claim 5
Dependent Claim
11 words
The coupling of claim 1 wherein said material is polyphenylene sulfide.
Claim 6
Dependent Claim
11 words
The coupling of claim 2 wherein said material is polyphenylene sulfide.
Claim 7
Dependent Claim
11 words
The coupling of claim 3 wherein said material is polyphenylene sulfide.
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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |