Patent US3216355A successfully refreshed from Google Patents.
US3216355A
Expired / Lapsed
US
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Two-cylinder pump
Assignee: Seeger Wanner Corp
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Filing: 1963-02-25
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Granted: 1965-11-09
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Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 William F Wanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:27
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/02; F04B1/04; F04B1/06; F04B1/07; F04B49/00; F04B49/12; F04B49/123; F04B49/125; F04B49/126; F04B53/00; F04B53/10; F04B53/102; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/21; Y10T74/2173; Y10T74/2179
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
MEANS FOR VARYING THE STROKE OF A PAIR OF OPPOSED PISTONS RIGIDLY INTERCONNECTED BY A PISTON ROD IN A PISTON PUMP WHEREBY ROTARY MOVEMENT OF A DRIVE SHAFT IS CONVERTED INTO COMMON RECIPROCATORY MOVEMENT OF SAID OPPOSED PISTONS BY OPERATIVELY CONNECTING SAID PISTON ROD WITH A CYLINDRICAL ECCENTRIC CAM POSITIONED ON THE FORWARD END OF SAID SHAFT, SAID STROKE VARYING MEANS COMPRISING: (A) A FIRST BORE FORMED IN SAID DRIVE SHAFT''S ONE END AND AXIALLY EXTENDING BUT ECCENTRIC TO THE AXIS OF SAID DRIVE SHAFT, (B) A SECOND BORE FORMED IN SAID ECCENTRIC ELEMENT AXIALLY EXTENDING BUT ECCENTRIC TO THE AXIS OF SAID ECCENTRIC ELEMENT,
Claim 2
Dependent Claim
105 words
MEANS FOR VARYING THE STROKE OF A PAIR OF OPPOSED PISTONS RIGIDLY INTERCONNECTED BY A PISTON ROD IN A PISTON PUMP WHEREBY ROTARY MOVEMENT OF A DRIVE SHAFT IS CONVERTED INTO COMMON RECIPROCATORY MOVEMENT OF SAID OPPOSED PISTONS BY OPERATIVELY CONNECTING SAID PISTON ROD WITH A CYLINDRICAL ECCENTRIC CAM POSITIONED ON THE FORWARD END OF SAID SHAFT, SAID STROKE VARYING MEANS COMPRISING: (A) A FIRST BORE FORMED IN SAID DRIVE SHAFT''S ONE END AND AXIALLY EXTENDING BUT ECCENTRIC TO THE AXIS OF SAID DRIVE SHAFT, (B) A SECOND BORE FORMED IN SAID ECCENTRIC ELEMENT AXIALLY EXTENDING BUT ECCENTRIC TO THE AXIS OF SAID ECCENTRIC ELEMENT,
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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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |