US3094904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mud pump pistons
Assignee: Individual
•
Filing: 1961-07-11
•
Granted: 1963-06-25
•
Expires: 1981-07-11
Abstract
No abstract record available.
Inventors
- 👤 James W Healy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B53/143; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3208; F16J15/3212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PUMP PISTON COMPRISING A BODY ADAPTED TO BE SECURED TO A ROD OF A PUMP FOR RECIPROCATION WITHIN A CYLINDER, AN ANNULAR FLANGE EXTENDING RADIALLY FROM THE BODY, AN ANNULAR PACKING RING POSITIONED ON THE BODY IN ABUTMENT WITH SAID FLANGE WITH THE SURFACE OF SAID PACKING RING OPPOSITE SAID FLANGE PROVIDING A PRESSURE FACE WITH A PACKING RING LIP AT THE OUTER DIAMETER OF SAID PRESSURE FACE, SAID PACKING RING INCLUDING A BODY OF ELASTOMERIC MATERIAL AND A PLURALITY OF CIRCUMFERENTIALLY SPACED LONGITUDINALLY EXTENDING LEAF SPRINGS POSITIONED WITHIN SAID ELASTOMERIC BODY, SAID LEAF SPRINGS BEING SO CONSTRUCTED AND ARRANGED AS TO NORMALLY URGE SAID LIP TO A DIAMETER SUBSTANTIALLY EQUAL TO BUT LESS THAN THE DIAMETER OF SAID CYLINDER.
Claim 2
Dependent Claim
121 words
A PUMP PISTON COMPRISING A BODY ADAPTED TO BE SECURED TO A ROD OF A PUMP FOR RECIPROCATION WITHIN A CYLINDER, AN ANNULAR FLANGE EXTENDING RADIALLY FROM THE BODY, AN ANNULAR PACKING RING POSITIONED ON THE BODY IN ABUTMENT WITH SAID FLANGE WITH THE SURFACE OF SAID PACKING RING OPPOSITE SAID FLANGE PROVIDING A PRESSURE FACE WITH A PACKING RING LIP AT THE OUTER DIAMETER OF SAID PRESSURE FACE, SAID PACKING RING INCLUDING A BODY OF ELASTOMERIC MATERIAL AND A PLURALITY OF CIRCUMFERENTIALLY SPACED LONGITUDINALLY EXTENDING LEAF SPRINGS POSITIONED WITHIN SAID ELASTOMERIC BODY, SAID LEAF SPRINGS BEING SO CONSTRUCTED AND ARRANGED AS TO NORMALLY URGE SAID LIP TO A DIAMETER SUBSTANTIALLY EQUAL TO BUT LESS THAN THE DIAMETER OF SAID CYLINDER.
References Cited (Backward Citations)
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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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |