Patent US4400991A successfully refreshed from Google Patents.
US4400991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rack and pinion steering gear, especially for motor vehicles
Assignee: ZF Friedrichshafen AG
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Filing: 1980-07-15
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Granted: 1983-08-30
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Expires: 2000-07-15
Abstract
Abstract A thrust piece having a cylindrical, thin-walled portion is associated with the rack biasing device of a rack and pinion steering gear. The thin-walled portion is slotted and urged into contact with the gear housing by a spreader element to dampen movement of the biasing device which is slidably supported in the housing.
Inventors
- 👤 Werner Breitweg
- 👤 Wolfgang Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:23
CPC Classifications
F; F16; F16H; F16H19/00; F16H19/02; F16H19/04; B; B62; B62D; B62D3/00; B62D3/02; B62D3/12; B62D3/123; F16H55/00; F16H55/02; F16H55/26; F16H55/28; F16H55/283; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1967
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
In a rack steering gear having a steering-gear housing (1), a drive pinion (2), a spindle connected to the drive pinion, an axially displaceable rack (3) engaged with the drive pinion and arranged transversely to the spindle, and plastic thrust means (5, 25) mounted resiliently in the steering-gear housing for supporting and guiding said rack, and a spring (4) biasing the thrust means, the improvement including a cylindrical, thin-walled quide portion (8, 28) on the thrust means provided with axially running slots; a spreader element (11, 21) acting on the thin-walled quide portion disposed within the thrust means; the thrust means further including an upright portion (10) supported in the housing and a rack supporting bed (6) integral with the upright portion, the upright portion being a hollow cylinder arranged within the spring (4).
Claim 2
Dependent Claim
134 words
In a rack steering gear having a steering-gear housing (1), a drive pinion (2), a spindle connected to the drive pinion, an axially displaceable rack (3) engaged with the drive pinion and arranged transversely to the spindle, and plastic thrust means (5, 25) mounted resiliently in the steering-gear housing for supporting and guiding said rack, and a spring (4) biasing the thrust means, the improvement including a cylindrical, thin-walled quide portion (8, 28) on the thrust means provided with axially running slots; a spreader element (11, 21) acting on the thin-walled quide portion disposed within the thrust means; the thrust means further including an upright portion (10) supported in the housing and a rack supporting bed (6) integral with the upright portion, the upright portion being a hollow cylinder arranged within the spring (4).
Claim 3
Dependent Claim
129 words
In a steering apparatus having a housing (1), a rack (3) displaceable along a longitudinal axis and engaged with a rotatable pinion (2) in said housing, an axial compression spring (4) in said housing and a thrust member (5) through which the spring urges said rack into engagement with said pinion to take up gear play, the improvement residing in said thrust member having an inner axial thrust absorbing body portion (10) on which the compression spring is seated and an outer elastically flexible portion (8), and prestressed spring means (11-12, 21) mounted within the thrust member for radially biasing said outer flexible portion thereof into sliding frictional contact with the housing to dampen movements imparted to the thrust member because of gear play between the rack and pinion.
Claim 4
Dependent Claim
129 words
In a steering apparatus having a housing (1), a rack (3) displaceable along a longitudinal axis and engaged with a rotatable pinion (2) in said housing, an axial compression spring (4) in said housing and a thrust member (5) through which the spring urges said rack into engagement with said pinion to take up gear play, the improvement residing in said thrust member having an inner axial thrust absorbing body portion (10) on which the compression spring is seated and an outer elastically flexible portion (8), and prestressed spring means (11-12, 21) mounted within the thrust member for radially biasing said outer flexible portion thereof into sliding frictional contact with the housing to dampen movements imparted to the thrust member because of gear play between the rack and pinion.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |