Patent US3747969A successfully refreshed from Google Patents.
US3747969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy absorbing bumper mount
Assignee: Motors Liquidation Co
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Filing: 1971-02-25
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Granted: 1973-07-24
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Expires: 1991-02-25
Abstract
Abstract A vehicle collison bumper mount includes serially actuated primary and secondary energy absorbing units. The primary unit includes a strut rigidly projecting from a bumper bar and a friction pad operative to clamp the strut to the chassis frame, the strut being slidable relative to the chassis frame and the friction pad and against the uniform resistance of mechanical friction to effect primary energy absorption. The secondary unit includes a slidable contact member clamped to the chassis frame in spaced relation to the strut. After a predetermined amount of sliding movement during primary energy absorption the strut engages the contact member and forces the latter to slide as a unit therewith so that the frictional resistance to sliding of the contact member effects additional or secondary energy absorption.
Inventors
- 👤 J Diener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:03
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R2019/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
359 words
In a vehicle, the combination comprising, means on said vehicle defining a flat surface, a collision bumper structure including a rigid strut having a pair of slots and a receiving aperture therein, a pair of rigid support members on said vehicle, each of said support members being received in a respective one of said slots to thereby mount said rigid strut on said vehicle for engagement on and for bodily movement relative to said flat surface, clamping means disposed between said vehicle and said strut for generating a primary force between said strut and said flat surface of predetermined magnitude and normal to said flat surface, said primary normal force generating a primary mechanical friction force beween said flat surface and said strut proportional in magnitude to the magnitude of said primary normal force and resisting relative bodily movement of said strut so that a portion of the kinetic energy of an extraordinary impact on said bumper structure is absorbed by bodily movement of said strut against the resistance of said primary friction force, a contact member, means supporting said contact member on said vehicle for engagement on and for bodily movement relative to said flat surface and within the confines of said receiving aperture, and means disposed between said vehicle and said contact member adapted for generating a secondary force between the latter and said flat surface of predetermined magnitude and normal to said flat surface, said secondary normal force generating a secondary mechanical friction force between said flat surface and said contact member proportional in magnitude to the magnitude of said secondary normal force and resisting bodily movement of said contact member relative to said flat surface, said contact member being predeterminedly smaller in size than said receiving aperture so that said strut and said bumper structure are bodily movable relative to said contact member and to said vehicle through a predetermined distance before an edge of said receiving aperture engages a corresponding edge of said contact member, said contact member thereafter being bodily movable as a unit with said strut relative to said vehicle and against said secondary friction force thereby to effect additional energy absorption.
Claim 2
Dependent Claim
359 words
In a vehicle, the combination comprising, means on said vehicle defining a flat surface, a collision bumper structure including a rigid strut having a pair of slots and a receiving aperture therein, a pair of rigid support members on said vehicle, each of said support members being received in a respective one of said slots to thereby mount said rigid strut on said vehicle for engagement on and for bodily movement relative to said flat surface, clamping means disposed between said vehicle and said strut for generating a primary force between said strut and said flat surface of predetermined magnitude and normal to said flat surface, said primary normal force generating a primary mechanical friction force beween said flat surface and said strut proportional in magnitude to the magnitude of said primary normal force and resisting relative bodily movement of said strut so that a portion of the kinetic energy of an extraordinary impact on said bumper structure is absorbed by bodily movement of said strut against the resistance of said primary friction force, a contact member, means supporting said contact member on said vehicle for engagement on and for bodily movement relative to said flat surface and within the confines of said receiving aperture, and means disposed between said vehicle and said contact member adapted for generating a secondary force between the latter and said flat surface of predetermined magnitude and normal to said flat surface, said secondary normal force generating a secondary mechanical friction force between said flat surface and said contact member proportional in magnitude to the magnitude of said secondary normal force and resisting bodily movement of said contact member relative to said flat surface, said contact member being predeterminedly smaller in size than said receiving aperture so that said strut and said bumper structure are bodily movable relative to said contact member and to said vehicle through a predetermined distance before an edge of said receiving aperture engages a corresponding edge of said contact member, said contact member thereafter being bodily movable as a unit with said strut relative to said vehicle and against said secondary friction force thereby to effect additional energy absorption.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |