Patent US3187677A successfully refreshed from Google Patents.
US3187677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston pump
Assignee: Individual
•
Filing: 1962-11-05
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Granted: 1965-06-08
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Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Stieber Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:48
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/18; F04C14/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A ROTARY PISTON PUMP COMPRISING: AN ANNULAR ROTOR ELEMENT HAVING CIRCUMFERENTIALLY EQUALLY SPACED RADIAL SLOTS, A VANE DEVICE RADIALLY SLIDABLY PLACED IN EACH OF SAID SLOTS, AN OUTER ELASTIC ANNULAR ELEMENT COAXIALLY SURROUNDING SAID ROTOR AND CONFINING A SPACE AROUND SAID ROTOR WHICH SPACE IS DIVIDED BY SAID VANE DEVICES INTO SUCTION AND PRESSURE CHAMBERS, AN INNER ELASTIC ANNULAR ELEMENT COAXIALLY PLACED INSIDE SAID ROTOR AND CONFINING A SPACE ADJACENT TO THE INSIDE OF SAID ROTOR WHICH SPACE IS DIVIDED BY SAID VANE DEVICES INTO SUCTION AND PRESSURE CHAMBERS, MEANS PLACED RADIALLY OUTSIDE OF SAID OUTER ELASTIC ANNULAR ELEMENT FOR ELASTICALLY DEFORMING SAID OUTER ELASTIC ELEMENT TO CHANGE THE CURVATURE THEREOF AND THE CONFIGURATION OF SAID SUCTION AND PRESSURE CHAMBERS, AN INLET MEANS CONNECTED TO EACH OF SAID SUCTION CHAMBERS, AND AN OUTLET MEANS CONNECTED TO EACH OF SAID PRESSURE CHAMBERS.
Claim 2
Dependent Claim
141 words
A ROTARY PISTON PUMP COMPRISING: AN ANNULAR ROTOR ELEMENT HAVING CIRCUMFERENTIALLY EQUALLY SPACED RADIAL SLOTS, A VANE DEVICE RADIALLY SLIDABLY PLACED IN EACH OF SAID SLOTS, AN OUTER ELASTIC ANNULAR ELEMENT COAXIALLY SURROUNDING SAID ROTOR AND CONFINING A SPACE AROUND SAID ROTOR WHICH SPACE IS DIVIDED BY SAID VANE DEVICES INTO SUCTION AND PRESSURE CHAMBERS, AN INNER ELASTIC ANNULAR ELEMENT COAXIALLY PLACED INSIDE SAID ROTOR AND CONFINING A SPACE ADJACENT TO THE INSIDE OF SAID ROTOR WHICH SPACE IS DIVIDED BY SAID VANE DEVICES INTO SUCTION AND PRESSURE CHAMBERS, MEANS PLACED RADIALLY OUTSIDE OF SAID OUTER ELASTIC ANNULAR ELEMENT FOR ELASTICALLY DEFORMING SAID OUTER ELASTIC ELEMENT TO CHANGE THE CURVATURE THEREOF AND THE CONFIGURATION OF SAID SUCTION AND PRESSURE CHAMBERS, AN INLET MEANS CONNECTED TO EACH OF SAID SUCTION CHAMBERS, AND AN OUTLET MEANS CONNECTED TO EACH OF SAID PRESSURE CHAMBERS.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |