Patent US4548125A successfully refreshed from Google Patents.
US4548125A
Expired / Lapsed
US
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Piston arrangement, particularly for an internal combustion engine
Assignee: MTU MOTORN-UND TURBINEN UNION GmbH
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Filing: 1982-07-01
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Granted: 1985-10-22
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Expires: 2002-07-01
Abstract
Abstract A piston arrangement including a hollow piston, a piston pin extending within the piston, an intermediate abutment within the piston supporting the pin between its ends, and a transmission member, e.g., a connecting rod, engaging the pin on each side of the intermediate abutment. The intermediate abutment may be supported by the circumferential wall of the piston, or by the piston head, and may be formed as one piece with the piston. The transmission member may have a forked end for engaging the piston pin, the intermediate abutment being between the arms of the fork. The piston pin may be two separate aligned pins each having an end located within the intermediate abutment. The piston, intermediate abutment, piston pin, and transmission member may all be formed of a ceramic material.
Inventors
- 👤 Werner Huther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:35
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/16; F02; F02F; F02F7/00; F02F7/0085; F02F7/0087; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32861
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
A piston arrangement for an internal combustion engine, comprising: a hollow piston having a circumferential wall, support means at opposite sides of the piston wall for supporting an end of a piston pin, an intermediate abutment within the piston, the piston and the intermediate abutment being formed as a single piece of ceramic material, an opening extending completely through the intermediate abutment, the opening being spaced from each of the support means and being aligned with both support means, two axially aligned piston pins made of ceramic material, each pin having one end supported within one of the support means and the other end supported within the opening in the intermediate abutment adjacent to the centerline of the piston, and a piston rod having an end formed with means for engaging the two pins.
Claim 2
Dependent Claim
134 words
A piston arrangement for an internal combustion engine, comprising: a hollow piston having a circumferential wall, support means at opposite sides of the piston wall for supporting an end of a piston pin, an intermediate abutment within the piston, the piston and the intermediate abutment being formed as a single piece of ceramic material, an opening extending completely through the intermediate abutment, the opening being spaced from each of the support means and being aligned with both support means, two axially aligned piston pins made of ceramic material, each pin having one end supported within one of the support means and the other end supported within the opening in the intermediate abutment adjacent to the centerline of the piston, and a piston rod having an end formed with means for engaging the two pins.
Claim 3
Dependent Claim
33 words
A piston arrangement as defined in claim 1, wherein the piston rod has a forked end, the arms of the fork engaging the two piston pins at opposite sides of the intermediate abutment.
Claim 4
Dependent Claim
27 words
A piston arrangement as defined in claim 1, where the piston, the piston pins, the intermediate abutment, and the piston rod are all made of ceramic material.
Claim 5
Dependent Claim
17 words
A piston arrangement as defined in claim 1 wherein the piston rod is made of ceramic material.
Claim 6
Dependent Claim
25 words
A piston arrangement as defined in claim 4 wherein the ceramic material is selected from the group consisting of Si 3 N 4 and SiC.
Claim 7
Dependent Claim
25 words
The piston arrangement as defined in claim 1 wherein the ceramic material is selected from the group consisting of Si 3 N 4 and SiC.
References Cited (Backward Citations)
DE157510C
Cited
US1784291A
Cited
FR686883A
Cited
US1859360A
Cited
US2395911A
Cited
US2791991A
Cited
GB1032360A
Cited
US3327594A
Cited
US3497038A
Cited
US3636823A
Cited
FR2421311A1
Cited
US4343229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |