Patent US3194446A successfully refreshed from Google Patents.
US3194446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston pump
Assignee: Stewart Warner Corp
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Filing: 1963-10-11
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Granted: 1965-07-13
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Expires: 1983-10-11
Abstract
No abstract record available.
Inventors
- 👤 Lee T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:31
CPC Classifications
F; F04; F04B; F04B23/00; F04B23/02; F04B49/00; F04B49/22; F04B49/24; F04B53/00; F04B53/10; F04B53/1037; F04B53/12; F04B53/121; F04B9/00; F04B9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A PUMP, COMPRISING A PUMP CYLINDER, A PUMP STEM EXTENDING AXIALLY WITHIN THE PUMP CYLINDER, A PISTON ASSEMBLY SECURED AND SEALED TO THE PUMP STEM, SAID PISTON ASSEMBLY BEING OPERABLE IN ONE POSITION TO BE SEALED ACROSS TO THE PERIPHERY OF THE CYLINDER TO DEFINE BETWEEN THE CYLINDER AND THE PUMP STEM AN EXPANSIBLE FLUID PUMPING CHAMBER AND BEING OPERABLE IN A SECOND POSITION TO BE UNSEALED ACROSS TO THE PERIPHERY OF THE CYLINDER TO PERMIT PRIMING FLOW OF THE FLUID PAST THE PISTON ASSEMBLY TO THE PUMPING CHAMBER, OUTLET MEANS FOR THE FLUID FROM THE PUMPING CHAMBER, A CHECK ASSEMBLY FOR THE PUMP CYLINDER ADAPTED TO DEFINE WITHIN THE PUMP CYLINDER A PRIMING CHAMBER ON THE OPPOSITE SIDER OF THE PISTON ASSEMBLY FROM THAT OF THE PUMPING CHAMBER, SAID CHECK ASSEMBLY BEING SPRING BIASED CLOSED OPERABLE TO MAINTAIN BY MEANS OF THE SPRING BIAS THE PRIMING CHAMBER PRESSURE CONFINED UP TO A PREDETERMINED FLUID PRESSURE AND THEREAFTER TO PERMIT FLUID BY-PASS FROM THE PRIMING CHAMBER WHEREBY SAID PISTON IS ADAPTED TO BE RETURNED TO A PREDETERMINED POSITION IRRESPECTIVE OF THE LENGTH OF TRAVEL
Claim 2
Dependent Claim
184 words
A PUMP, COMPRISING A PUMP CYLINDER, A PUMP STEM EXTENDING AXIALLY WITHIN THE PUMP CYLINDER, A PISTON ASSEMBLY SECURED AND SEALED TO THE PUMP STEM, SAID PISTON ASSEMBLY BEING OPERABLE IN ONE POSITION TO BE SEALED ACROSS TO THE PERIPHERY OF THE CYLINDER TO DEFINE BETWEEN THE CYLINDER AND THE PUMP STEM AN EXPANSIBLE FLUID PUMPING CHAMBER AND BEING OPERABLE IN A SECOND POSITION TO BE UNSEALED ACROSS TO THE PERIPHERY OF THE CYLINDER TO PERMIT PRIMING FLOW OF THE FLUID PAST THE PISTON ASSEMBLY TO THE PUMPING CHAMBER, OUTLET MEANS FOR THE FLUID FROM THE PUMPING CHAMBER, A CHECK ASSEMBLY FOR THE PUMP CYLINDER ADAPTED TO DEFINE WITHIN THE PUMP CYLINDER A PRIMING CHAMBER ON THE OPPOSITE SIDER OF THE PISTON ASSEMBLY FROM THAT OF THE PUMPING CHAMBER, SAID CHECK ASSEMBLY BEING SPRING BIASED CLOSED OPERABLE TO MAINTAIN BY MEANS OF THE SPRING BIAS THE PRIMING CHAMBER PRESSURE CONFINED UP TO A PREDETERMINED FLUID PRESSURE AND THEREAFTER TO PERMIT FLUID BY-PASS FROM THE PRIMING CHAMBER WHEREBY SAID PISTON IS ADAPTED TO BE RETURNED TO A PREDETERMINED POSITION IRRESPECTIVE OF THE LENGTH OF TRAVEL
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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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |