US4577989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball joint
Assignee: TRW Fahrwerksysteme GmbH and Co KG
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Filing: 1984-06-25
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Granted: 1986-03-25
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Expires: 2004-06-25
Abstract
Abstract The subject of the invention is a ball joint for motor vehicles comprising a bearing insert (4) located between a joint housing (1) and a ball head (3). The bearing insert is provided with meridionally extending slots (9) arranged in a half-portion gripping of the ball head over the equator. A clamping ring (5) located in the housing grips the tongues (10) of this bearing insert (4). To improve the elasticity of the bearing parts while retaining a good distribution of lubricant, the clamping ring (5) is provided with circumferential grooves (13) on its inner surface and with openings (15) in the outer end surface (14).
Inventors
- 👤 Eiichi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:51
CPC Classifications
F; F16; F16C; F16C11/00; F16C11/04; F16C11/06; F16C11/0619; F16C11/0623; F16C11/0628; F16C11/0633; F16C11/0638; F16C11/0685; F16C2326/00; F16C2326/20; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32737; Y10T403/32778
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A ball joint for a vehicle comprising: a housing for receiving a ball head, a bearing insert disposed between said housing and said ball head, said bearing insert having a body portion engaging said ball head on one side of the equatorial plane thereof and axially extending tongues defining slots therebetween and gripping said ball head on the other side of the equatorial plane thereof, and a clamping ring supported in said housing in surrounding relationship with respect to said tongues, the inner surface of said clamping ring and the outer surface of said tongues defining complimentary conical surfaces, said clamping ring having circumferentially extending grooves on the inner surface thereof and axially extending projections in the form of annular segments on the outer surface thereof engaging said housing to thereby provide for prestressing said ball joint.
Claim 2
Dependent Claim
137 words
A ball joint for a vehicle comprising: a housing for receiving a ball head, a bearing insert disposed between said housing and said ball head, said bearing insert having a body portion engaging said ball head on one side of the equatorial plane thereof and axially extending tongues defining slots therebetween and gripping said ball head on the other side of the equatorial plane thereof, and a clamping ring supported in said housing in surrounding relationship with respect to said tongues, the inner surface of said clamping ring and the outer surface of said tongues defining complimentary conical surfaces, said clamping ring having circumferentially extending grooves on the inner surface thereof and axially extending projections in the form of annular segments on the outer surface thereof engaging said housing to thereby provide for prestressing said ball joint.
Claim 3
Dependent Claim
18 words
A ball joint according to claim 1 wherein the inner edges of said axially extending projections are bevelled.
Claim 4
Dependent Claim
40 words
Ball joint according to claims 1 or 2, wherein the bearing insert is made of a hard elastic plastic, for example, polyoxymethylene (POM), and the clamping ring is made, for example, of a soft elastic plastic, for example, polyurethane (PUR).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |