Patent US4326907A successfully refreshed from Google Patents.
US4326907A
Expired / Lapsed
US
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Method of identifying piston rings
Assignee: Goetze GmbH
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Filing: 1979-09-26
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Granted: 1982-04-27
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Expires: 1999-09-26
Abstract
Abstract Piston rings of asymmetrical cross section are identified by providing a surface marking which extends from one flank face of the piston ring to the outer circumferential face (running face) thereof.
Inventors
- 👤 Horst Bornefeld
- 👤 Hans P. Fort
- 👤 Werner Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:16
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/10; B44C1/14; F; F16; F16J; F16J9/00; F16J9/12; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T428/00; Y10T428/14; Y10T428/26; Y10T428/269
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A method of identifying the orientation of a piston ring having opposite annular flank faces, an inner circumferential face and an outer circumferential running face; comprising the step of applying, in a single operational step, a visual, thin synthetic foil marking of less than 2μ thick exclusively to one of said flank faces and at least one part of said running face, whereby subsequent to said step the visual marking extends on said one flank face and continues on said running face.
Claim 2
Independent Claim
82 words
A method of identifying the orientation of a piston ring having opposite annular flank faces, an inner circumferential face and an outer circumferential running face; comprising the step of applying, in a single operational step, a visual, thin synthetic foil marking of less than 2μ thick exclusively to one of said flank faces and at least one part of said running face, whereby subsequent to said step the visual marking extends on said one flank face and continues on said running face.
Claim 3
Dependent Claim
32 words
A method as defined in claim 1, wherein the marking is applied simultaneously to the surface of one of said flank faces and over the entire axial height of said running face.
Claim 4
Dependent Claim
35 words
A method as defined in claim 1, wherein the marking is applied to that flank face of the piston ring which, when installed in an internal combustion engine, is oriented towards the combustion chamber thereof.
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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |