Patent US3227095A successfully refreshed from Google Patents.
US3227095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable stroke pump
Assignee: Daytona Thompson Corp
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Filing: 1963-06-04
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Granted: 1966-01-04
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Expires: 1983-06-04
Abstract
No abstract record available.
Inventors
- 👤 Tom H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/30; F04B1/32; F04B1/324; F04B1/20; F04B1/2014; F04B1/2042; F04B1/2064; F04B1/2078; F04B1/22; F04B1/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN FLUID HANDLING MECHANISM, A CYLINDER HEAD HAVING A WORKING FACE, AN ANNULAR GROOVE IN SAID FACE DEFINING INLET AND EXHAUST PORTS, MEANS DISPOSED IN SAID ANNULAR GROOVE SEPARATING SAID PORTS FOR ONE ANOTHER, AT LEAST ONE OF SAID MEANS BEING MOVABLE UNDER EXHAUST PRESSURE IN A DIRECTION ENLARGING THE VOLUME OF THE EXHAUST PORT, MEANS LIMITING PRESSURE MOVEMENT OF SAID FIRST NAMED MEANS, MEANS BIASING SAID FIRST NAMED MEANS IN A DIRECTION REDUCING THE VOLUME OF SAID EXHAUST MOVEMENT, MEANS LIMITING SAID BIASING MOVEMENT, A BLOCK CARRYING A CYLINDER AND MOUNTED TO CARRY THE CYLINDER IN COMMUNICATION WITH FIRST ONE AND THEN THE OTHER OF SAID PORTS, PISTONS CARRIED BY SAID BLOCK, MEANS FOR MOVING SAID BLOCK, AND MEANS OPERABLE TO RECIPROCATE SAID PISTONS DURING PASSAGE OVER SAID PORTS.
Claim 2
Dependent Claim
130 words
IN FLUID HANDLING MECHANISM, A CYLINDER HEAD HAVING A WORKING FACE, AN ANNULAR GROOVE IN SAID FACE DEFINING INLET AND EXHAUST PORTS, MEANS DISPOSED IN SAID ANNULAR GROOVE SEPARATING SAID PORTS FOR ONE ANOTHER, AT LEAST ONE OF SAID MEANS BEING MOVABLE UNDER EXHAUST PRESSURE IN A DIRECTION ENLARGING THE VOLUME OF THE EXHAUST PORT, MEANS LIMITING PRESSURE MOVEMENT OF SAID FIRST NAMED MEANS, MEANS BIASING SAID FIRST NAMED MEANS IN A DIRECTION REDUCING THE VOLUME OF SAID EXHAUST MOVEMENT, MEANS LIMITING SAID BIASING MOVEMENT, A BLOCK CARRYING A CYLINDER AND MOUNTED TO CARRY THE CYLINDER IN COMMUNICATION WITH FIRST ONE AND THEN THE OTHER OF SAID PORTS, PISTONS CARRIED BY SAID BLOCK, MEANS FOR MOVING SAID BLOCK, AND MEANS OPERABLE TO RECIPROCATE SAID PISTONS DURING PASSAGE OVER SAID PORTS.
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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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |