Patent US3203513A successfully refreshed from Google Patents.
US3203513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking means for a hydraulic drive cylinder
Assignee: Individual
•
Filing: 1961-05-29
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Granted: 1965-08-31
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Earle F Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:16
CPC Classifications
F; F16; F16D; F16D63/00; E; E01; E01D; E01D15/00; E01D15/06; F16D49/00; F16D49/16; F16D63/008; F16D2125/00; F16D2125/18; F16D2125/58; F16D2125/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A FAIL-SAFE BRAKE FOR A HYDRAULIC DRIVE CYLINDER HAVING A MOVABLE DRIVE PISTON AND AN ELONGATED PISTON ROD COUPLED THERETO WITHIN SAID CYLINDER AND CONTACTING THE HYDRAULIC FLUID COMPRISING THE COMBINATION OF A GENERALLY CYLINDRICAL ELONGATED BRAKE SHOE HAVING A GENERALLY CYLINDRICAL INNER BRAKING SURFACE SURROUNDING SAID PISTON ROD AND HAVING A FLARED OUTER SURFACE, AN ELONGATED GENERALLY CYLINDRICAL BRAKING PISTON SURROUNDING SAID BRAKE SHOE AND HAVING A FLARED INNER SURFACE COMPLEMENTARY
Claim 2
Dependent Claim
72 words
A FAIL-SAFE BRAKE FOR A HYDRAULIC DRIVE CYLINDER HAVING A MOVABLE DRIVE PISTON AND AN ELONGATED PISTON ROD COUPLED THERETO WITHIN SAID CYLINDER AND CONTACTING THE HYDRAULIC FLUID COMPRISING THE COMBINATION OF A GENERALLY CYLINDRICAL ELONGATED BRAKE SHOE HAVING A GENERALLY CYLINDRICAL INNER BRAKING SURFACE SURROUNDING SAID PISTON ROD AND HAVING A FLARED OUTER SURFACE, AN ELONGATED GENERALLY CYLINDRICAL BRAKING PISTON SURROUNDING SAID BRAKE SHOE AND HAVING A FLARED INNER SURFACE COMPLEMENTARY
References Cited (Backward Citations)
AT81002B
Cited
US1608392A
Cited
US2382263A
Cited
US2627328A
Cited
US2705059A
Cited
US2689965A
Cited
US2881457A
Cited
US2845902A
Cited
US2959260A
Cited
US2889895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |