Patent US3228494A successfully refreshed from Google Patents.
US3228494A
Expired / Lapsed
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Temperature compensated viscous shear rotary damper
Assignee: Houdaille Industries Inc
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Filing: 1964-02-27
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Granted: 1966-01-11
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Expires: 1984-02-27
Abstract
No abstract record available.
Inventors
- 👤 Rumsey Rollin Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:27
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/50; F16F9/52; F16D; F16D35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A VISCOUS SHEAR ROTARY DAMPER UNIT COMPRISING A HOUSING, A SHAFT ROTATABLY MOUNTED IN SAID HOUSING, A SHEAR FILM WORKING SURFACE STATIONARY IN SAID HOUSING, A MEMBER TORSIONALLY RELATED TO SAID STATIONARY WORKING SURFACE AND AFFORDING A COMPLEMENTARY WORKING SURFACE IN SHEAR FILM SPACED RELATION TO SAID STATIONARY WORKING SURFACE, MEANS MECHANICALLY COUPLING SAID MEMBER AND SAID SHAFT FOR RELATIVE AXIAL ADJUSTMENT MOVEMENT OF SAID
Claim 2
Dependent Claim
65 words
A VISCOUS SHEAR ROTARY DAMPER UNIT COMPRISING A HOUSING, A SHAFT ROTATABLY MOUNTED IN SAID HOUSING, A SHEAR FILM WORKING SURFACE STATIONARY IN SAID HOUSING, A MEMBER TORSIONALLY RELATED TO SAID STATIONARY WORKING SURFACE AND AFFORDING A COMPLEMENTARY WORKING SURFACE IN SHEAR FILM SPACED RELATION TO SAID STATIONARY WORKING SURFACE, MEANS MECHANICALLY COUPLING SAID MEMBER AND SAID SHAFT FOR RELATIVE AXIAL ADJUSTMENT MOVEMENT OF SAID
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |