US3733668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a sliding bearing for a universal joint
Assignee: ZF Lemfoerder GmbH
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Filing: 1972-04-10
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Granted: 1973-05-22
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Expires: 1992-04-10
Abstract
Abstract The sliding bearing includes an outer cup-shaped thin metal bearing bush seated in the ends of a fork of the universal joint, and an inner sliding bush, of abrasion and oil resistant plastic composition material, embracing each pin of the universal joint, there being a predetermined clearance between the inner and outer bushes. The plastic inner bush is formed by pouring around a cylindrical core inserted into the outer bush. The plastic bush, when it sets, shrinks to disengage its outer surface from the inner surface of the outer bush, and has a gripping fit with the pin of the joint. In this embodiment also the outer bush has an in-turned flange at its open end.
Inventors
- 👤 G Lange
- 👤 J Ulderup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:58
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; B; B21; B21D; B21D53/00; B21D53/10; F16C33/208; F16D; F16D3/00; F16D3/16; F16D3/26; F16D3/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49641; Y10T29/49705; Y10T29/49826; Y10T29/4984; Y10T29/49844
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
A method for producing a sliding bearing, of the type including an outer cylindrical metal bearing bush and an inner sliding bush of plastic composition material embracing a pin of the universal joint, comprising the steps of inserting a cylindrical mold core into the outer metal bearing bush to form, with the latter, an annular mold space; filling the annular mold space with plastic composition material in liquid form; the plastic composition material, upon setting, shrinking to disengage its outer cylindrical surface from the inner cylindrical surface of the outer metal bearing bush; removing the cylindrical mold core from the set plastic composition material, whereby the inner diameter of the annular plastic composition material molded bush decreases; and pressing the resultant inner sliding bush of plastic composition material with initial stress onto a pin of a universal joint, together with the outer bearing element.
Claim 2
Independent Claim
144 words
A method for producing a sliding bearing, of the type including an outer cylindrical metal bearing bush and an inner sliding bush of plastic composition material embracing a pin of the universal joint, comprising the steps of inserting a cylindrical mold core into the outer metal bearing bush to form, with the latter, an annular mold space; filling the annular mold space with plastic composition material in liquid form; the plastic composition material, upon setting, shrinking to disengage its outer cylindrical surface from the inner cylindrical surface of the outer metal bearing bush; removing the cylindrical mold core from the set plastic composition material, whereby the inner diameter of the annular plastic composition material molded bush decreases; and pressing the resultant inner sliding bush of plastic composition material with initial stress onto a pin of a universal joint, together with the outer bearing element.
Claim 3
Dependent Claim
46 words
A method, as claimed in claim 1, including the step of initially forming a radially inwardly extending flange on at least one end of the outer metal bearing bush so that the outer metal bearing bush forms, conjointly with the cylindrical mold core, a mold chamber.
Claim 4
Dependent Claim
30 words
A method, as claimed in claim 2, in which the outer metal bearing bush is a cup-shaped metal bearing bush having the radially inwardly projecting flange at its open end.
Claim 5
Dependent Claim
28 words
A method, as claimed in claim 2, including the step of forming the outer metal bearing bush by a drawing operation from a single piece of uncut metal.
References Cited (Backward Citations)
US3000089A
Cited
US3089232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |