Patent US4279528A successfully refreshed from Google Patents.
US4279528A
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Tulip member for a tripod joint and process for producing the same
Assignee: Glaenzer Spicer SA
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Filing: 1979-08-29
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Granted: 1981-07-21
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Expires: 1999-08-29
Abstract
Abstract The object of this invention is to improve the performance of the tulip members in the regions of connection or attachment between the petal portions and the adjacent shaft, this result being obtained by simple means. For this purpose, whereas the rest of the member (the raceways, bottom, cavities for the attachment of members effecting an axial retention) is carburized or carbonitrided, the connection regions are substantially devoid of any carburizing or carbonitriding.
Inventors
- 👤 Jacques Mangiavacchi
- 👤 Alain Chauvelot
- 👤 Claude Dolain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/04; F; F16; F16D; F16D3/00; F16D3/16; F16D3/20; F16D3/202; F16D3/207; Y; Y10; Y10S; Y10S464/00; Y10S464/902; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32041
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
51 words
In a metal tulip member for a tripod type joint, the tulip member comprising a shaft, branches which are connected to the shaft in connection regions and define raceways; the improvement wherein the tulip member is completely carburized except in said connection regions, which regions are substantially devoid of any carburizing.
Claim 2
Dependent Claim
51 words
In a metal tulip member for a tripod type joint, the tulip member comprising a shaft, branches which are connected to the shaft in connection regions and define raceways; the improvement wherein the tulip member is completely carburized except in said connection regions, which regions are substantially devoid of any carburizing.
Claim 3
Dependent Claim
79 words
A process for producing a tulip member in particular for a tripod type joint, the tulip member comprising a shaft and branches which are connected to the shaft in connection regions and define raceways, the process comprising placing in position, in each of said connection regions, a masking means which is sufficiently impermeable to high temperature and thereafter effecting a carburizing treatment on the entire surface of the tulip member except in said regions masked by said masking means.
Claim 4
Dependent Claim
79 words
A process for producing a tulip member in particular for a tripod type joint, the tulip member comprising a shaft and branches which are connected to the shaft in connection regions and define raceways, the process comprising placing in position, in each of said connection regions, a masking means which is sufficiently impermeable to high temperature and thereafter effecting a carburizing treatment on the entire surface of the tulip member except in said regions masked by said masking means.
Claim 5
Dependent Claim
16 words
A process as claimed in claim 2 or 6, wherein said masking means comprises a varnish.
Claim 6
Dependent Claim
26 words
A process as claimed in claim 2 or 6, wherein said masking means comprises metal members which fit the shape of said regions to be masked.
Claim 7
Dependent Claim
51 words
In a metal tulip member for a tripod type joint, the tulip member comprising a shaft, branches which are connected to the shaft in connection regions and define raceways; the improvement wherein the tulip member is completely carbonitrided except in said connection regions, which regions are substantially devoid of any carbonitriding.
Claim 8
Dependent Claim
51 words
In a metal tulip member for a tripod type joint, the tulip member comprising a shaft, branches which are connected to the shaft in connection regions and define raceways; the improvement wherein the tulip member is completely carbonitrided except in said connection regions, which regions are substantially devoid of any carbonitriding.
Claim 9
Dependent Claim
79 words
A process for producing a tulip member in particular for a tripod type joint, the tulip member comprising a shaft and branches which are connected to the shaft in connection regions and define raceways, the process comprising placing in position, in each of said connection regions, a masking means which is sufficiently impermeable to high temperature and thereafter effecting a carbonitriding treatment on the entire surface of the tulip member except in said regions masked by said masking means.
Claim 10
Dependent Claim
79 words
A process for producing a tulip member in particular for a tripod type joint, the tulip member comprising a shaft and branches which are connected to the shaft in connection regions and define raceways, the process comprising placing in position, in each of said connection regions, a masking means which is sufficiently impermeable to high temperature and thereafter effecting a carbonitriding treatment on the entire surface of the tulip member except in said regions masked by said masking means.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |