US3571898A
Expired / Lapsed
US
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Method for marking and determining the orientation of piston rings
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1968-05-16
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Granted: 1971-03-23
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Expires: 1988-05-16
Abstract
Abstract A method and apparatus for determining the orientation of a split piston ring; in particular, for determining whether the ring lies right side up or upside down. A mark made at least in part of an active substance is applied to the piston ring in the region of one of its gap ends and the ring is moved past a device for sensing the presence of the active substance.
Inventors
- 👤 Ernst Fuhrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:06
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49274; Y10T29/49764; Y10T29/49771; Y10T29/49773
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A method of determining the orientation of split piston rings each having a pair of side surfaces and a noncylindrical sliding surface, comprising the steps of: a. applying a mark to a predetermined one of the side and sliding surfaces of a split ring; and b. scanning at least a portion of the ring for sensing the presence of the mark in a predetermined position as an indication of the orientation of the ring.
Claim 2
Independent Claim
74 words
A method of determining the orientation of split piston rings each having a pair of side surfaces and a noncylindrical sliding surface, comprising the steps of: a. applying a mark to a predetermined one of the side and sliding surfaces of a split ring; and b. scanning at least a portion of the ring for sensing the presence of the mark in a predetermined position as an indication of the orientation of the ring.
Claim 3
Dependent Claim
22 words
The method defined in claim 1 wherein said applying step includes applying an active substance to at least partially form the mark.
Claim 4
Dependent Claim
13 words
The method defined in claim 2 wherein the active substance includes radioactive isotopes.
Claim 5
Dependent Claim
12 words
The method defined in claim 2 wherein the active substance is magnetic.
Claim 6
Dependent Claim
24 words
The method defined in claim 3 wherein said scanning and sensing step includes the step of moving a Geiger counter relative to said ring.
Claim 7
Dependent Claim
24 words
The method defined in claim 4 wherein said scanning and sensing step includes the step of moving an electric coil relative to said ring.
Claim 8
Dependent Claim
20 words
The method defined in claim 1, further including the step of simultaneously scanning and sensing a plurality of piston rings.
References Cited (Backward Citations)
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Cited
US2580342A
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US2988984A
Cited
US3012144A
Cited
US3100840A
Cited
US3296689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |