Patent US4252207A successfully refreshed from Google Patents.
US4252207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assisted steering device for a vehicle
Assignee: Valeo SE
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Filing: 1979-02-22
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Granted: 1981-02-24
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Expires: 1999-02-22
Abstract
Abstract The invention relates to a power-assisted steering arrangement in which the power-assisting mechanism is controlled in response to a limited relative angular movement which takes place between two parts of a control element such as a steering column. According to the invention, a coupling interconnecting the two parts in a manner which provides the limited angular displacement comprises external teeth formed on the two adjacent ends of the parts, and a connecting part such as a sleeve, or a disc with a central bore, which is provided with internal teeth which engage the external teeth of the two parts. A limited amount of play is present between the internal teeth and one or both sets of external teeth to provide for the relative angular displacement of the two parts.
Inventors
- 👤 Jean L. R. Dauvergne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:48
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/08; B62D5/083; B62D5/20; B62D5/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
An assisted steering device for a vehicle, comprising control means acting on direction changing means, the said control means having an transmission element in two parts which parts are capable of limited relative angular displacement permitting angular offsetting of the parts under the action of the said control means, and assistance means which, in response to such angular off-setting, are operable to act on the direction changing means in the same sense as the control means, characterised in that the said parts respectively comprise two ends located adjacent each other and provided with external teeth, and an external part is provided having internal teeth engaging the said two sets of external teeth provided on the transmission element parts, angular play being present between said internal teeth and at least one of the said sets of external teeth.
Claim 2
Dependent Claim
137 words
An assisted steering device for a vehicle, comprising control means acting on direction changing means, the said control means having an transmission element in two parts which parts are capable of limited relative angular displacement permitting angular offsetting of the parts under the action of the said control means, and assistance means which, in response to such angular off-setting, are operable to act on the direction changing means in the same sense as the control means, characterised in that the said parts respectively comprise two ends located adjacent each other and provided with external teeth, and an external part is provided having internal teeth engaging the said two sets of external teeth provided on the transmission element parts, angular play being present between said internal teeth and at least one of the said sets of external teeth.
Claim 3
Dependent Claim
28 words
A device as claimed in claim 1, characterised in that the said external part engages the said two sets of external teeth with angular play on both sets.
Claim 4
Dependent Claim
30 words
A device as claimed in claim 2, characterised in that the said angular play is greater on one of the two said sets of external teeth than on the other.
Claim 5
Dependent Claim
23 words
A device as claimed in claim 2, characterised in that the said angular play is equal on both said sets of external teeth.
Claim 6
Dependent Claim
35 words
A device as claimed in claim 1, characterised in that the said external part having internal teeth engages with play on one of said sets of teeth and with no play on the other set.
Claim 7
Dependent Claim
19 words
A device as claimed in claim 1, characterised in that the said external part comprises an internally-toothed cylindrical sleeve.
Claim 8
Dependent Claim
21 words
A device as claimed in claim 1, characterised in that the said external part comprises a disc having an internally-toothed bore.
Claim 9
Dependent Claim
54 words
A device as claimed in claim 7, wherein the said assistance means comprise a hydraulic system having a pump and a reservoir, a hydraulic jack acting on the said direction changing means and a hydraulic distributor interposed between the system and the jack, and said disc comprises a rotor disc of the said distributor.
Claim 10
Dependent Claim
41 words
A device as claimed in claim 8, characterised in that the said distributor comprises a second rotor disc which engages without play with the set of external teeth which receives the first rotor disc with the said limited relative angular play.
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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |