US3198127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pump or motor
Assignee: Individual
•
Filing: 1962-02-26
•
Granted: 1965-08-03
•
Expires: 1982-02-26
Abstract
No abstract record available.
Inventors
- 👤 Robert W Brundage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:07
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0088; F04C2/00; F04C2/08; F04C2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A HYDRAULIC PUMP COMPRISING OF A HOUSING HAVING AN INWARDLY FACING SURFACE DEFINING A PUMPING CAVITY; AN EXTERNALLY TOOTHED AND AN INTERNALLY TOOTHED GEAR MEMBER ROTATABLE ABOUT SPACED AXES AND DEFINING A PLURALITY OF PROGRESSIVELY INCREASING AND DECREASING VOLUME PUMPING CHAMBERS, SAID GEARS EACH HAVING AN AXIALLY FACING SURFACE, A BEARING MEMBER ROTATABLY SUPPORTING SAID INTERNALLY TOOTHED GEAR AND HAVING AN AXIALLY FACING SEALING SURFACE, A SEALING MEMBER HAVING AN OPPOSITE AXIALLY FACING SEALING SURFACE ENGAGING THE GEAR SEALING SURFACES, THE IMPROVEMENT WHICH COMPRISES SAID SEALING MEMBER SEALING SURFACE EXTENDING RADIALLY BEYOND THE PERIPHERY OF SAID INTERNALLY TOOTHED GEAR MEMBER, SAID BEARING MEMBER BEING AXIALLY MOVABLE IN SAID HOUSING AND MEANS BIASING SAID BEARING MEMBER SEALING SURFACE AGAINST SAID SEALING MEMBER SEALING SURFACE.
Claim 2
Dependent Claim
124 words
IN A HYDRAULIC PUMP COMPRISING OF A HOUSING HAVING AN INWARDLY FACING SURFACE DEFINING A PUMPING CAVITY; AN EXTERNALLY TOOTHED AND AN INTERNALLY TOOTHED GEAR MEMBER ROTATABLE ABOUT SPACED AXES AND DEFINING A PLURALITY OF PROGRESSIVELY INCREASING AND DECREASING VOLUME PUMPING CHAMBERS, SAID GEARS EACH HAVING AN AXIALLY FACING SURFACE, A BEARING MEMBER ROTATABLY SUPPORTING SAID INTERNALLY TOOTHED GEAR AND HAVING AN AXIALLY FACING SEALING SURFACE, A SEALING MEMBER HAVING AN OPPOSITE AXIALLY FACING SEALING SURFACE ENGAGING THE GEAR SEALING SURFACES, THE IMPROVEMENT WHICH COMPRISES SAID SEALING MEMBER SEALING SURFACE EXTENDING RADIALLY BEYOND THE PERIPHERY OF SAID INTERNALLY TOOTHED GEAR MEMBER, SAID BEARING MEMBER BEING AXIALLY MOVABLE IN SAID HOUSING AND MEANS BIASING SAID BEARING MEMBER SEALING SURFACE AGAINST SAID SEALING MEMBER SEALING SURFACE.
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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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |