US3136228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston structure
Assignee: BALDWIN MONTROSE CHEMICAL COMP
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Filing: 1962-02-05
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Granted: 1964-06-09
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Expires: 1982-02-05
Abstract
No abstract record available.
Inventors
- 👤 Vacell D Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:19
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/02; F16J1/005; F16J1/006; F16J1/008; F16J10/00; F16J10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
PISTON STRUCTURE COMPRISING A CENTRAL GUIDING PORTION INCLUDING A SEPARATE SUPPORTING RING HAVING A RING OF LOW FRICTION MATERIAL SECURED TO THE OUTER CIRCUMFERENCE THEREOF AND A SEPARATE SEALING AND CUSHIONING PORTION AT EACH SIDE OF THE CENTRAL GUIDING PORTION EACH INCLUDING AN ANNULAR DISC HAVING A SEALING AND CUSHIONING MEMBER BONDED TO THE SIDE THEREOF OPPOSITE THE GUIDING PORTION OF THE PISTON, SAID SEALING AND CUSHIONING MEMBER INCLUDING A CIRCUMFERENTIALLY EXTENDING RADIALLY OUTER ANNULAR SEALING LIP AND AXIALLY EXTENDING ANGULARLY SPACED BUMPERS POSITIONED RADIALLY INWARDLY OF THE OUTER CIRCUMFERENCE OF THE DISC.
Claim 2
Dependent Claim
93 words
PISTON STRUCTURE COMPRISING A CENTRAL GUIDING PORTION INCLUDING A SEPARATE SUPPORTING RING HAVING A RING OF LOW FRICTION MATERIAL SECURED TO THE OUTER CIRCUMFERENCE THEREOF AND A SEPARATE SEALING AND CUSHIONING PORTION AT EACH SIDE OF THE CENTRAL GUIDING PORTION EACH INCLUDING AN ANNULAR DISC HAVING A SEALING AND CUSHIONING MEMBER BONDED TO THE SIDE THEREOF OPPOSITE THE GUIDING PORTION OF THE PISTON, SAID SEALING AND CUSHIONING MEMBER INCLUDING A CIRCUMFERENTIALLY EXTENDING RADIALLY OUTER ANNULAR SEALING LIP AND AXIALLY EXTENDING ANGULARLY SPACED BUMPERS POSITIONED RADIALLY INWARDLY OF THE OUTER CIRCUMFERENCE OF THE DISC.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |