Patent US3311028A successfully refreshed from Google Patents.
US3311028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling diaphragm device with rolling diaphragm having clamping bead and resilient clamping means for the bead
Assignee: Bellofram Corp
•
Filing: 1966-07-26
•
Granted: 1967-03-28
•
Expires: 1986-07-26
Abstract
No abstract record available.
Inventors
- 👤 John F Taplin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:14
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; F16; F16J; F16J3/00; F16J3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A ROLLING DIAPHRAGM DEVICE COMPRISING: (A) A CYLINDER BODY HAVING A LONGITUDINAL AXIS AND HAVING AN INTERNAL CYLINDRICAL LATERAL WALL SURFACE AND HAVING AN INTERNAL SUBSTANTIALLY FLAT INNER END SURFACE, SAID INTERNAL CYLINDRICAL LATERAL WALL SURFACE AND SAID SUBSTANTIALLY FLAT INNER END SURFACE DEFINING A SUBSTANTIALLY CIRCULAR EDGE AT THE LOCUS OF INTERSECTION THEREOF; (B) A RECIPROCABLE PISTON COAXIALLY ARRANGED INSIDE SAID CYLINDER BODY HAVING AN EXTERNAL CYLINDRICAL LATERAL WALL SURFACE SPACED FROM SAID INTERNAL CYLINDRICAL LATERAL WALL SURFACE OF CYLINDER BODY, SAID LATERAL WALL SURFACE OF SAID CYLINDER BODY AND SAID LATERAL WALL SURFACE OF SAID PISTON DEFINING A TOROIDAL SPACE; (C) A ROLLING DIAPHRAGM HAVING A RADIALLY INNER PORTION SECURED TO SAID PISTON, A ROLLING WALL FORMING A CONVOLUTION ARRANGED INSIDE SAID TOROIDAL SPACE AND AN ANNULAR CLAMPING BEAD ARRANGED SUBSTANTIALLY AT SAID CIRCULAR EDGE AT SAID LOCUS OF INTERSECTION OF SAID LATERAL SURFACE OF SAID CYLINDER BODY AND SAID END SURFACE THEREOF; AND
Claim 2
Dependent Claim
156 words
A ROLLING DIAPHRAGM DEVICE COMPRISING: (A) A CYLINDER BODY HAVING A LONGITUDINAL AXIS AND HAVING AN INTERNAL CYLINDRICAL LATERAL WALL SURFACE AND HAVING AN INTERNAL SUBSTANTIALLY FLAT INNER END SURFACE, SAID INTERNAL CYLINDRICAL LATERAL WALL SURFACE AND SAID SUBSTANTIALLY FLAT INNER END SURFACE DEFINING A SUBSTANTIALLY CIRCULAR EDGE AT THE LOCUS OF INTERSECTION THEREOF; (B) A RECIPROCABLE PISTON COAXIALLY ARRANGED INSIDE SAID CYLINDER BODY HAVING AN EXTERNAL CYLINDRICAL LATERAL WALL SURFACE SPACED FROM SAID INTERNAL CYLINDRICAL LATERAL WALL SURFACE OF CYLINDER BODY, SAID LATERAL WALL SURFACE OF SAID CYLINDER BODY AND SAID LATERAL WALL SURFACE OF SAID PISTON DEFINING A TOROIDAL SPACE; (C) A ROLLING DIAPHRAGM HAVING A RADIALLY INNER PORTION SECURED TO SAID PISTON, A ROLLING WALL FORMING A CONVOLUTION ARRANGED INSIDE SAID TOROIDAL SPACE AND AN ANNULAR CLAMPING BEAD ARRANGED SUBSTANTIALLY AT SAID CIRCULAR EDGE AT SAID LOCUS OF INTERSECTION OF SAID LATERAL SURFACE OF SAID CYLINDER BODY AND SAID END SURFACE THEREOF; AND
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |