Patent US4496323A successfully refreshed from Google Patents.
US4496323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force restoration system for the simulation of vehicle driving members
Assignee: Thales SA
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Filing: 1983-12-13
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Granted: 1985-01-29
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Expires: 2003-12-13
Abstract
Abstract A member placed in a vehicle driving simulator makes it possible to simulate the hydraulic braking and driving controls. It comprises a cylindrical envelope in which slide a first member and a piston joined by a tubular elastomer spring, whose compression simulates the deformation of the hydraulic pipes and the braking members. With the bottom of the envelope, the piston forms a back-pressure chamber which is supplied with compressed air and makes it possible to simulate the feedback of the braking system. A retractable stop at the bottom of the envelope and on which bears a rod extending the piston, makes it possible when it is retracted, to simulate a hydraulic circuit failure.
Inventors
- 👤 Robert Alet
- 👤 Eric Vignault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:40
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/28; G09B9/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A force restoration system for the simulation of vehicle driving members, which comprises: an envelope forming a cylinder open at one end and closed at the other; a first member sliding in said cylinder to receive the thrust exerted by the driver by the open end of the cylinder; a piston sliding in the cylinder between the first member and the closed end of the cylinder and defining with said closed end a back-pressure chamber; a tubular elastomer spring, whose ends respectively bear on the first member and the piston to transmit between them the pressures to which they are exposed; means for supplying the back-pressure chamber with compressed air, when the first member reaches a given position in the cylinder.
Claim 2
Dependent Claim
121 words
A force restoration system for the simulation of vehicle driving members, which comprises: an envelope forming a cylinder open at one end and closed at the other; a first member sliding in said cylinder to receive the thrust exerted by the driver by the open end of the cylinder; a piston sliding in the cylinder between the first member and the closed end of the cylinder and defining with said closed end a back-pressure chamber; a tubular elastomer spring, whose ends respectively bear on the first member and the piston to transmit between them the pressures to which they are exposed; means for supplying the back-pressure chamber with compressed air, when the first member reaches a given position in the cylinder.
Claim 3
Dependent Claim
35 words
A system according to claim 1, which also comprises a push rod for transmitting the thrust of the driver to the first member, and a pressure transducer which makes it possible to measure said thrust.
Claim 4
Dependent Claim
91 words
A system according to claim 2, which also comprises a second member sealing the closed end of the cylinder and having a blind radial bore and an axial bore issuing into the radial bore, a retractable stop placed in the radial bore, a first rod extending the piston engaging in the axial bore and penetrating the radial bore or engaging with the retractable stop as a function of the position thereof, and means for retarding the retractable stop and restoring it to its position under the control of an external signal.
Claim 5
Dependent Claim
90 words
A system according to claim 2, wherein the means for operating the retractable stop comprise a first electrovalve, a first pipe issuing into the bottom of the radial bore and which is supplied by compressed air by the first electro-valve in order to move the stop towards the opening of said radial bore, a first return spring located in the radial bore for bringing the stop towards the bottom thereof and a plug screwed into said radial bore to maintain said return spring towards the opening of said axial bore.
Claim 6
Dependent Claim
85 words
A system according to claim 4, wherein the back-pressure chamber supply means comprise a second rod, which is operated simultaneously with the first member, a second return spring of limited rigidity to bring back the second rod in its initial position, a contactor operated by the second rod at the end of a predetermined travel thereof, a second electro-valve controlled by the contactor, and a second pipe which is connected to the back-pressure chamber and which is fed by compressed air by the second electro-valve.
References Cited (Backward Citations)
US2851795A
Cited
GB762826A
Cited
US3795990A
Cited
US3861065A
Cited
US3973332A
Cited
US4227319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |