Patent US3208388A successfully refreshed from Google Patents.
US3208388A
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Pump
Assignee: Individual
•
Filing: 1964-06-03
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Granted: 1965-09-28
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Clarence O Glasgow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:17
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/14212; A61M5/14216; F; F04; F04B; F04B9/00; F04B9/02; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/18328
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A PUMP: A HOUSING HAVING A PAIR OF SPACED CYLINDERS THEREIN; PISTON MEANS OPERABLY DISPOSED IN EACH OF SAID CYLINDERS AND INCLUDING: A PISTION RECIPROCABLY DISPOSED IN EACH OF SAID CYLINDERS; AND A BALL NUT MOUNTED ON AN END OF EACH OF SAID PISTONS; A PAIR OF ROTATABLE SHAFTS EACH AXIALLY ALIGNED WITH EACH OF SAID PISTONS AND HAVING A THREADED PORTION THEREON OPERABLY ENGAGING THE BALL NUT OF THE RESPECTIVE PISTON WHEREBY SAID BALL NUTS AND PISTONS ARE CAUSED TO MOVE IN A LINEAR DIRECTION IN RESPONSE TO ROTATION OF THE RESPECTIVE ROTATABLE SHAFT; POWER MEANS FOR DRIVING SAID ROTATABLE SHAFTS AT A CONSTANT ROTATIONAL SPEED AND BEING FURTHER CHARACTERIZED AS INSTANTANEOUSLY REVERSIBLE; CONNECTING MEANS FOR ROTATABLY CONNECTING SAID POWER MEANS WITH AT LEAST ONE OF SAID SHAFTS; AND SWITCH MEANS OPERABLY ENGAGED WITH AT LEAST ONE OF SAID PISTON MEANS AND CONNECTED WITH SAID POWER MEANS, WHEREBY SAID POWER MEANS IS CAUSED TO ROTATE SAID DRIVING MEANS IN ONE DIRECTION AND THEN THE OTHER.
Claim 2
Dependent Claim
167 words
IN A PUMP: A HOUSING HAVING A PAIR OF SPACED CYLINDERS THEREIN; PISTON MEANS OPERABLY DISPOSED IN EACH OF SAID CYLINDERS AND INCLUDING: A PISTION RECIPROCABLY DISPOSED IN EACH OF SAID CYLINDERS; AND A BALL NUT MOUNTED ON AN END OF EACH OF SAID PISTONS; A PAIR OF ROTATABLE SHAFTS EACH AXIALLY ALIGNED WITH EACH OF SAID PISTONS AND HAVING A THREADED PORTION THEREON OPERABLY ENGAGING THE BALL NUT OF THE RESPECTIVE PISTON WHEREBY SAID BALL NUTS AND PISTONS ARE CAUSED TO MOVE IN A LINEAR DIRECTION IN RESPONSE TO ROTATION OF THE RESPECTIVE ROTATABLE SHAFT; POWER MEANS FOR DRIVING SAID ROTATABLE SHAFTS AT A CONSTANT ROTATIONAL SPEED AND BEING FURTHER CHARACTERIZED AS INSTANTANEOUSLY REVERSIBLE; CONNECTING MEANS FOR ROTATABLY CONNECTING SAID POWER MEANS WITH AT LEAST ONE OF SAID SHAFTS; AND SWITCH MEANS OPERABLY ENGAGED WITH AT LEAST ONE OF SAID PISTON MEANS AND CONNECTED WITH SAID POWER MEANS, WHEREBY SAID POWER MEANS IS CAUSED TO ROTATE SAID DRIVING MEANS IN ONE DIRECTION AND THEN THE OTHER.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |