Patent US3207043A successfully refreshed from Google Patents.
US3207043A
Expired / Lapsed
US
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Hydraulic hammer
Assignee: Unisys Corp
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Filing: 1964-04-09
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Granted: 1965-09-21
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Expires: 1984-04-09
Abstract
No abstract record available.
Inventors
- 👤 Robert E Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:11
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/12; E01B27/13; E01B27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
IN A HYDRAULIC DEVICE, THE COMBINATION COMPRISING A HOUSING SAID HOUSING HAVING A BORE, A MEMBER RECIPROCABLE IN SAID BORE, SAID RECIPROCATING MEMBER HAVING OPPOSED PRESSURE AREAS DEFINING FIRST AND SECOND PRESSURE AREAS, SAID FIRST PRESSURE AREA HAVING AN EFFECTIVE CROSS SECTIONAL AREA LESS THAN SAID SECOND PRESSURE AREA, MEANS FOR CONTINUOUSLY APPLYING FLUID UNDER PRESSURE TO SAID FIRST PRESSURE AREA, HYDRAULICALLY CONTROLLED VALVE MEANS FOR ALTERNATELY APPLYING FLUID UNDER PRESSURE TO SAID SECOND PRESSURE AREA, SAID HOUSING HAVING PASSAGE MEANS EXTENDING BETWEEN SAID BORE AND SAID VALVE MEANS, SAID PASSAGE MEANS BEING ALTERNATELY CONNECTED BY MOVEMENT OF SAID RECIPROCATING MEMBER TO OPERATE SAID VALVE MEANS AND CONTROL THE APPLICATION OF PRESSURE TO SAID SECOND PRESSURE AREA, SAID RECIPROCABLE MEMBER HAVING AN AXIALLY EXTENDING PORTION THEREOF SPACED FROM THE WALL OF SAID BORE AND PROVIDING COMMUNICATION BETWEEN SAID SECOND PRESSURE AREA AND THE ADJACENT END OF SAID MEMBER WHEN THE MEMBER IS AT ONE END OF SAID BORE WHEREBY SAID MEMBER IS MAINTAINED AT SAID ONE END OF SAID BORE UNITL AXIAL EXTERNAL FORCE IS APPLIED TO SAID MEMBER IN A DIRECTION TENDING TO MOVE SAID MEMBER TOWARD THE OPPOSITE END OF SAID BORE.
Claim 2
Dependent Claim
194 words
IN A HYDRAULIC DEVICE, THE COMBINATION COMPRISING A HOUSING SAID HOUSING HAVING A BORE, A MEMBER RECIPROCABLE IN SAID BORE, SAID RECIPROCATING MEMBER HAVING OPPOSED PRESSURE AREAS DEFINING FIRST AND SECOND PRESSURE AREAS, SAID FIRST PRESSURE AREA HAVING AN EFFECTIVE CROSS SECTIONAL AREA LESS THAN SAID SECOND PRESSURE AREA, MEANS FOR CONTINUOUSLY APPLYING FLUID UNDER PRESSURE TO SAID FIRST PRESSURE AREA, HYDRAULICALLY CONTROLLED VALVE MEANS FOR ALTERNATELY APPLYING FLUID UNDER PRESSURE TO SAID SECOND PRESSURE AREA, SAID HOUSING HAVING PASSAGE MEANS EXTENDING BETWEEN SAID BORE AND SAID VALVE MEANS, SAID PASSAGE MEANS BEING ALTERNATELY CONNECTED BY MOVEMENT OF SAID RECIPROCATING MEMBER TO OPERATE SAID VALVE MEANS AND CONTROL THE APPLICATION OF PRESSURE TO SAID SECOND PRESSURE AREA, SAID RECIPROCABLE MEMBER HAVING AN AXIALLY EXTENDING PORTION THEREOF SPACED FROM THE WALL OF SAID BORE AND PROVIDING COMMUNICATION BETWEEN SAID SECOND PRESSURE AREA AND THE ADJACENT END OF SAID MEMBER WHEN THE MEMBER IS AT ONE END OF SAID BORE WHEREBY SAID MEMBER IS MAINTAINED AT SAID ONE END OF SAID BORE UNITL AXIAL EXTERNAL FORCE IS APPLIED TO SAID MEMBER IN A DIRECTION TENDING TO MOVE SAID MEMBER TOWARD THE OPPOSITE END OF SAID BORE.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |