Patent US4720205A successfully refreshed from Google Patents.
US4720205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball joint
Assignee: TRW Fahrwerksysteme GmbH and Co KG
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Filing: 1987-01-30
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Granted: 1988-01-19
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Expires: 2007-01-30
Abstract
Abstract A ball joint includes a bearing which exerts a free play take up force against a ball stud. The bearing has trapezoidal-shaped spring arms connected therewith and disposed in a radial array. The free ends of the spring arms extend toward the longitudinal central axis of the ball stud. The free ends of the spring arms engage a housing cover and resiliently deflect to exert the free play take up force against the ball stud. The free ends of the spring arms are spaced from the ball stud.
Inventors
- 👤 Eiichi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:50
CPC Classifications
F; F16; F16C; F16C11/00; F16C11/04; F16C11/06; F16C11/0619; F16C11/0623; F16C11/0647; F16C11/0628; F16C11/0633; F16C11/0638; F16C11/0642; F16C2326/00; F16C2326/01; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32737; Y10T403/32778
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
A ball jount comprising: a housing having a cover; a ball stud having a ball portion disposed in the housing; and a bearing disposed between the housing and the ball portion and having an end portion and spring arms; the spring arms being disposed in a radial array, engaging the ball portion at one end and then extending spaced therefrom in a direction away from the ball portion; each of the spring arms having one end thereof connected to the end portion of the bearing and the other end thereof extending toward the longitudinal central axis of the ball stud, said other end being spaced from the ball portion and engaging the cover to thereby exert a force against the ball portion; the housing cover having a cup-like projection extending outwardly from the ball jount, the other ends of the spring arms engaging a cylindrical inner surface of said cup-like projection.
Claim 2
Dependent Claim
151 words
A ball jount comprising: a housing having a cover; a ball stud having a ball portion disposed in the housing; and a bearing disposed between the housing and the ball portion and having an end portion and spring arms; the spring arms being disposed in a radial array, engaging the ball portion at one end and then extending spaced therefrom in a direction away from the ball portion; each of the spring arms having one end thereof connected to the end portion of the bearing and the other end thereof extending toward the longitudinal central axis of the ball stud, said other end being spaced from the ball portion and engaging the cover to thereby exert a force against the ball portion; the housing cover having a cup-like projection extending outwardly from the ball jount, the other ends of the spring arms engaging a cylindrical inner surface of said cup-like projection.
Claim 3
Dependent Claim
145 words
A ball joint comprising: a housing having a cover; a ball stud having a ball portion disposed in the housing; and a bearing disposed between the housing and the ball portion and having an end portion and spring arms; the spring arms being disposed in a radial array, engaging the ball portion and extending in a direction away from the ball portion; each of the spring arms having one end thereof connected to the end portion of the bearing and the other end thereof extending toward the longitudinal central axis of the ball stud, said other end being spaced from the ball portion and engaging the cover to thereby exert a force against the ball portion; and each of the spring arms including a protrusion extending therefrom for engaging the ball portion of the ball stud to space the spring arm from the ball portion.
Claim 4
Dependent Claim
145 words
A ball joint comprising: a housing having a cover; a ball stud having a ball portion disposed in the housing; and a bearing disposed between the housing and the ball portion and having an end portion and spring arms; the spring arms being disposed in a radial array, engaging the ball portion and extending in a direction away from the ball portion; each of the spring arms having one end thereof connected to the end portion of the bearing and the other end thereof extending toward the longitudinal central axis of the ball stud, said other end being spaced from the ball portion and engaging the cover to thereby exert a force against the ball portion; and each of the spring arms including a protrusion extending therefrom for engaging the ball portion of the ball stud to space the spring arm from the ball portion.
Claim 5
Dependent Claim
46 words
A ball joint according to claim 2 wherein the ball portion has a planar surface diaametrically opposite the stud portion of the ball stud extending transverse to the longitudinal central axis, the spring arms engaging the ball portion at a location other than the planar surface.
Claim 6
Dependent Claim
25 words
A ball joint according to claim 2 wherein each of the spring arms has a trapezoidal configuration with a base portion connected with the bearing.
Claim 7
Dependent Claim
37 words
A ball joint according to claim 2 wherein the housing cover has a cup-like projection extending outwardly from the ball joint, the free ends of the spring arms engage a cylindrical inner surface of said cup-like projection.
Claim 8
Dependent Claim
25 words
A ball joint according to claim 2 wherein the other ends of the spring arms extend parallel to a support surface of the housing cover.
Claim 9
Dependent Claim
40 words
A ball joint according to claim 2 wherein a bearing surface of the bearing engages the ball portion of the ball stud on both sides of an equatorial plane extending perpendicular to the longitudinal central axis of the ball stud.
Claim 10
Dependent Claim
18 words
A ball joint according to claim 2 wherein the bearing and spring arms are formed as one piece.
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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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |