US3204534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Raymond International Inc
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Filing: 1963-01-24
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Granted: 1965-09-07
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Expires: 1983-01-24
Abstract
No abstract record available.
Inventors
- 👤 Ernst W Spannhake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:34
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/10; B21J9/12; B06; B06B; B06B1/00; B06B1/18; B06B1/183; E; E02; E02D; E02D7/00; E02D7/02; E02D7/06; E02D7/10; F; F15; F15B; F15B13/00; F15B13/02; F15B13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
INERTIAL FORCE PRODUCING APPARATUS, COMPRISING: A HYDRAULIC CYLINDER, A PISTON RECIPROCABLE THEREIN, AN INERTIAL MASS RECIPROCATED BY SAID PISTON, VALVE MEANS INCLUDING A FIRST VALVE MEMBER DISPLACEABLE WITH SAID PISTON AND HAVING A CYLINDER BORE THEREIN, A SECOND VALVE MEMBER FITTING ROTATABLY WITHIN SAID BORE AND MEANS ROTATABLY MOUNTING THE SAME IN FIXED RELATION TO SAID CYLINDER, INTAKE AND DRAIN PORTS INDIVIDUAL TO SAID MEMBERS, RESPEC-
Claim 2
Dependent Claim
66 words
INERTIAL FORCE PRODUCING APPARATUS, COMPRISING: A HYDRAULIC CYLINDER, A PISTON RECIPROCABLE THEREIN, AN INERTIAL MASS RECIPROCATED BY SAID PISTON, VALVE MEANS INCLUDING A FIRST VALVE MEMBER DISPLACEABLE WITH SAID PISTON AND HAVING A CYLINDER BORE THEREIN, A SECOND VALVE MEMBER FITTING ROTATABLY WITHIN SAID BORE AND MEANS ROTATABLY MOUNTING THE SAME IN FIXED RELATION TO SAID CYLINDER, INTAKE AND DRAIN PORTS INDIVIDUAL TO SAID MEMBERS, RESPEC-
References Cited (Backward Citations)
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Cited
US1665046A
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US2420793A
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US2718804A
Cited
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Cited
US3072103A
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |