US3142262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure fluid pistons or plungers
Assignee: Council of Scientific and Industrial Research
•
Filing: 1961-08-24
•
Granted: 1964-07-28
•
Expires: 1981-08-24
Abstract
No abstract record available.
Inventors
- 👤 Firth Donald
- 👤 Hancock Roger Harvey Yorke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:13
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0082; F01B3/0085; F01B3/0032; F01B3/0044; F01B3/0052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A RECIPROCATING PISTON MACHINE COMPRISING A CYLINDER BLOCK HAVING A PLURALITY OF CYLINDERS; A PISTON RECIPROCABLE IN EACH CYLINDER, A GROUP OF SHALLOW POCKETS ARRANGED CIRCUMFERENTIALLY AROUND EACH CYLINDER WALL; A GALLERY IN THE CYLINDER BLOCK FOR EACH CYLINDER AND INTERCONNECTING ALL THE POCKETS OF A GROUP; A CONSTRICTION BETWEEN THE GALLERY AND EACH POCKET; A DUCT CONNECTING THE WORKING SPACE IN EACH CYLINDER TO THE GALLERY OF THAT CYLINDER; AND A BORE CONNECTING EACH GALLERY TO THE CORRESPONDING GALLERY OF AN ADJACENT CYLINDER.
Claim 2
Dependent Claim
84 words
A RECIPROCATING PISTON MACHINE COMPRISING A CYLINDER BLOCK HAVING A PLURALITY OF CYLINDERS; A PISTON RECIPROCABLE IN EACH CYLINDER, A GROUP OF SHALLOW POCKETS ARRANGED CIRCUMFERENTIALLY AROUND EACH CYLINDER WALL; A GALLERY IN THE CYLINDER BLOCK FOR EACH CYLINDER AND INTERCONNECTING ALL THE POCKETS OF A GROUP; A CONSTRICTION BETWEEN THE GALLERY AND EACH POCKET; A DUCT CONNECTING THE WORKING SPACE IN EACH CYLINDER TO THE GALLERY OF THAT CYLINDER; AND A BORE CONNECTING EACH GALLERY TO THE CORRESPONDING GALLERY OF AN ADJACENT CYLINDER.
References Cited (Backward Citations)
US587394A
Cited
US1274391A
Cited
US1679964A
Cited
US2155455A
Cited
GB424609A
Cited
US2300009A
Cited
US2449297A
Cited
US2357563A
Cited
US2430764A
Cited
US2847938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |