Patent US3140642A successfully refreshed from Google Patents.
US3140642A
Expired / Lapsed
US
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Piston construction
Assignee: Gardner Denver Inc
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Filing: 1962-09-04
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Granted: 1964-07-14
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Expires: 1982-09-04
Abstract
No abstract record available.
Inventors
- 👤 Arvid L Nelson
- 👤 Franklin T Saeger
- 👤 John E Seckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:54
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/005; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49826; Y10T29/49893; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN A PISTON CONSTRUCTION: (A) REVERSELY TURNED PISTON HALVES HAVING RADIALLY SPACED MATING SURFACES; (B) SUBSTANTIALLY NONCOMPRESSIBLE SPACER MEANS DISPOSED BETWEEN AND IN ABUTTING RELATION WITH SAID PISTON HALVES; SAID SPACER MEANS PROVIDING AXIAL SPACES BETWEEN SAID SURFACES; (C) A LAYER OF ADHESIVE MATERIAL RECEIVED IN SAID AXIAL SPACES AND STRUCTURALLY JOINING SAID HALVES; AND, (D) SAID SPACER MEANS BEING DISPOSED IN COAXIAL RELATION WITH SAID HALVES AND HAVING ANGULARLY SPACED
Claim 2
Dependent Claim
71 words
IN A PISTON CONSTRUCTION: (A) REVERSELY TURNED PISTON HALVES HAVING RADIALLY SPACED MATING SURFACES; (B) SUBSTANTIALLY NONCOMPRESSIBLE SPACER MEANS DISPOSED BETWEEN AND IN ABUTTING RELATION WITH SAID PISTON HALVES; SAID SPACER MEANS PROVIDING AXIAL SPACES BETWEEN SAID SURFACES; (C) A LAYER OF ADHESIVE MATERIAL RECEIVED IN SAID AXIAL SPACES AND STRUCTURALLY JOINING SAID HALVES; AND, (D) SAID SPACER MEANS BEING DISPOSED IN COAXIAL RELATION WITH SAID HALVES AND HAVING ANGULARLY SPACED
References Cited (Backward Citations)
US2451099A
Cited
US2772932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |