US3901531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety mechanism for the occupants of vehicles, particularly of motor vehicles
Assignee: Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH
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Filing: 1973-10-11
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Granted: 1975-08-26
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Expires: 1993-10-11
Abstract
Abstract Device for tensioning safety restraining devices for automotive passengers. For an automotive restraining device such as a seat belt, which is tensioned by a pressure cylinder device which is, in turn, actuated by deceleration sensitive devices, there is provided structure for insuring that the tension applied to the restraining device does not exceed a predetermined value. In one embodiment such a device is comprised of a relief valve for venting the pressure fluid from the cylinder at a predetermined value of pressure and in another embodiment the device is comprised of a mechanical relief device interposed between the cylinder and the restraining device.
Inventors
- 👤 Arthur Prochazka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:13
CPC Classifications
B; B60; B60R; B60R22/00; B60R22/18; B60R22/195; B60R22/1954; B60R22/1955; B60R22/28; B60R2022/288; B60R22/34; B60R22/46; B60R22/4604; B60R2022/4609; B60R22/4628; B60R2022/4661
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
In a safety belt tensioning apparatus for holding the occupant of a vehicle securely in position in the event of a collision, said safety tensioning apparatus having cylinder means and a piston reciprocably mounted in said cylinder means, said piston being connected to said safety belt, the improvement comprising gas propellant means for effecting a movement of said piston in one direction in said cylinder means in response to a collision event to effect a tightening of said safety belt holding said occupant, force-limiting means for controlling the tightening force generated by said gas propellant means and said piston on said safety belt to a predefined maximum force and damping means for controlling the rate of deceleration of said movement of said piston in said cylinder means.
Claim 2
Dependent Claim
127 words
In a safety belt tensioning apparatus for holding the occupant of a vehicle securely in position in the event of a collision, said safety tensioning apparatus having cylinder means and a piston reciprocably mounted in said cylinder means, said piston being connected to said safety belt, the improvement comprising gas propellant means for effecting a movement of said piston in one direction in said cylinder means in response to a collision event to effect a tightening of said safety belt holding said occupant, force-limiting means for controlling the tightening force generated by said gas propellant means and said piston on said safety belt to a predefined maximum force and damping means for controlling the rate of deceleration of said movement of said piston in said cylinder means.
Claim 3
Dependent Claim
23 words
The improved safety belt tensioning apparatus according to claim 1, wherein said force-limiting means is connected between said piston and said safety belt.
Claim 4
Dependent Claim
46 words
The improved safety belt tensioning apparatus according to claim 1, wherein said gas propellant means includes a propellant charge located on one side of said piston whereby upon an activation of said propellant charge a gas propellant is generated to effect said movement of said piston.
Claim 5
Dependent Claim
30 words
The improved safety belt tensioning apparatus according to claim 1, wherein said damping means include a honeycombed structure of flexible material mounted in the path of movement of said piston.
Claim 6
Dependent Claim
57 words
The improved safety belt tensioning apparatus according to claim 1, wherein said damping means include a gas valve in one end of said cylinder means for controlling the amount of gas escaping between said piston and said one end of said cylinder means as said piston is moved by said gas propellant means toward said one end.
Claim 7
Dependent Claim
32 words
The improved safety belt tensioning apparatus according to claim 1, wherein said damping means include means for adjusting said damping rate to thereby adjustably control said rate of deceleration of said piston.
Claim 8
Dependent Claim
47 words
The improved safety belt tensioning apparatus according to claim 1, wherein said damping means include stop means mounted in the path of said piston and locking means for locking said piston in a fixed displaced position at the termination of said movement thereof in said one direction.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |