US3751089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frangible shock absorbing bumper
Assignee: Peugeot & Renault
•
Filing: 1971-09-03
•
Granted: 1973-08-07
•
Expires: 1991-09-03
Abstract
Abstract A frangible shock absorbing bumper device for automotive vehicles, characterized in that it comprises an auxiliary chassis disposed at the end of the main chassis of the vehicle or of the structure corresponding thereto, the auxiliary chassis being connected to said main chassis by at least one element so arranged as to undergo a permanent deformation by shearing according to a predetermined law, the resistance to deformation of the element being lower than the resistance to deformation of the main chassis.
Inventors
- 👤 A Lefeuvre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/38; B60R19/40; B60R19/26; B60R19/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
Shock absorbing device for automotive vehicles having a first chassis, said shock absorbing device comprising an auxiliary second chassis disposed at the end of the first chassis and being movable relative to said first chassis, a plurality of deformable elements having heads, said elements being fixed on said auxiliary chassis, a metal plate fixed onto the first chassis and having elongated apertures in which said heads fit, the relation between said plate and said elements being such that relative movement between said first chassis and said auxiliary chassis causes a shearing action on said elements, the resistance to deformation of said elements being lower than the resistance to deformation of the first chassis.
Claim 2
Dependent Claim
113 words
Shock absorbing device for automotive vehicles having a first chassis, said shock absorbing device comprising an auxiliary second chassis disposed at the end of the first chassis and being movable relative to said first chassis, a plurality of deformable elements having heads, said elements being fixed on said auxiliary chassis, a metal plate fixed onto the first chassis and having elongated apertures in which said heads fit, the relation between said plate and said elements being such that relative movement between said first chassis and said auxiliary chassis causes a shearing action on said elements, the resistance to deformation of said elements being lower than the resistance to deformation of the first chassis.
Claim 3
Dependent Claim
74 words
Device according to claim 1, characterized in that said auxiliary chassis comprises hollow longitudinal side members rigidly connected through said deformable elements to the first chassis, each side member having slidably fitted therein one end of a bar having its opposite end connected to the bumper of the vehicle through knee-action links disposed between said bars and the side members of the auxiliary chassis, to permit locking of the device in its extended position.
Claim 4
Dependent Claim
71 words
Device according to claim 2, characterized in that a bellows is provided for controlling the release of said knee-action links as well as the sliding movements of said bars connected to the bumper in said side members of the auxiliary chassis, each end of said bellows being attached to one pivot pin of said knee action links, said bellows being responsive to the vacuum created by the engine of the vehicle.
Claim 5
Dependent Claim
63 words
Device according to claim 1, characterized in that said deformable elements are all secured with one end to said auxiliary chassis, the other end of some of these elements being fixedly connected to said metal plate rigid with said first chassis, the corresponding ends of the other deformable elements being adapted to move freely in apertures of different lengths formed in said plate.
Claim 6
Dependent Claim
19 words
Device according to claim 4, characterized in that said deformable elements are adapted to absorb shocks of low strength.
Claim 7
Dependent Claim
59 words
Device according to claim 1, further characterized in that said first chassis has rigidly fastened thereto a sheet metal plate formed with apertures engaged by cutters pivoted to the auxiliary chassis and adapted to move in relation to said first chassis in case of shock, said cutters having hook-shaped heads adapted to be engaged permanently in said plate apertures.
Claim 8
Dependent Claim
66 words
Device according to claim 5, characterized in that said sheet metal plate is disposed in a horizontal plane under the first chassis and that said cutters comprise each at their free end a V-shaped hook disposed in a vertical plane and having its point directed towards the shock-receiving side, the aperture of said V-shaped hook engaging the edge of the plate rigid with the first chassis.
Claim 9
Dependent Claim
22 words
Device according to claim 2, characterized in that said plate has a thickness varying in the direction of travel of said cutters.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |