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US3801147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorbing bumper
Assignee: Individual
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Filing: 1971-11-26
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Granted: 1974-04-02
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Expires: 1991-11-26
Abstract
Abstract A pneumatic, vacuum return shock absorption device and more specifically a shock absorbing bumper useful as a front and/or rear bumper for motor vehicles and motor boats and the like in which an air cylinder provides a cushion to shock applied to the piston of the cylinder and is vented to atmosphere on the high pressure side, the vent providing a selected resistance and a vacuum connection attached to a vacuum source in the vehicle whereby the piston and bumper are restored to regular position after the shock.
Inventors
- 👤 C Barrett
- 👤 J Kingsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:44
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R19/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
A shock absorbing bumper comprising: a bumper; at least one piston rod secured to said bumper for movement therewith; a cylinder aligned axially with each of said piston rods and containing a piston to which said piston rod is connected; a vacuum port through said cylinder on said piston rod side of said cylinder; a relief valve venting to atmosphere at the end of said cylinder opposite said piston rod; a check valve at the same end of said cylinder as said relief valve permitting flow of air from atmosphere to said cylinder; and a source of vacuum connected to said vacuum port whereby said piston is urged normally toward said piston rod end of said cylinder when said source of vacuum is operating and projecting said bumper outward in accord with said vacuum.
Claim 2
Dependent Claim
134 words
A shock absorbing bumper comprising: a bumper; at least one piston rod secured to said bumper for movement therewith; a cylinder aligned axially with each of said piston rods and containing a piston to which said piston rod is connected; a vacuum port through said cylinder on said piston rod side of said cylinder; a relief valve venting to atmosphere at the end of said cylinder opposite said piston rod; a check valve at the same end of said cylinder as said relief valve permitting flow of air from atmosphere to said cylinder; and a source of vacuum connected to said vacuum port whereby said piston is urged normally toward said piston rod end of said cylinder when said source of vacuum is operating and projecting said bumper outward in accord with said vacuum.
Claim 3
Dependent Claim
138 words
A shock absorption device comprising: a pneumatic cylinder of the double-acting type; a piston in said cylinder; a piston rod connected to said piston and reciprocating with said piston; an impact receiving bumper member connected to said bumper member, rod externally of said cylinder; a check valve in said cylinder closed when pressure in said cylinder exceeds atmospheric and open when pressure in said cylinder is at or below atmospheric; a relief valve in said cylinder venting to atmosphere at selected pressure settings above atmospheric, said check valve and said relief valve both in the end of said cylinder opposite said piston rod; a vacuum port located in the end of said cylinder through which said piston rod extends; and a source of vacuum connected to said vacuum port and biasing said piston and said piston rod outwardly.
Claim 4
Dependent Claim
138 words
A shock absorption device comprising: a pneumatic cylinder of the double-acting type; a piston in said cylinder; a piston rod connected to said piston and reciprocating with said piston; an impact receiving bumper member connected to said bumper member, rod externally of said cylinder; a check valve in said cylinder closed when pressure in said cylinder exceeds atmospheric and open when pressure in said cylinder is at or below atmospheric; a relief valve in said cylinder venting to atmosphere at selected pressure settings above atmospheric, said check valve and said relief valve both in the end of said cylinder opposite said piston rod; a vacuum port located in the end of said cylinder through which said piston rod extends; and a source of vacuum connected to said vacuum port and biasing said piston and said piston rod outwardly.
Claim 5
Dependent Claim
114 words
A shock absorption device of the pneumatic type comprising: a bumper element; at least one piston connected to said bumper element; a cylinder in which said piston is reciprocable; a relief valve in said cylinder at the end opposite the piston end thereof and opening at a preselected pressure on impact of said bumper; a check valve in said cylinder at the end opposite the piston end thereof opening said cylinder to atmospheric pressure on the return stroke of said piston; a vacuum port defined in said cylinder on the piston end thereof; and a source of vacuum connected to said port urging said piston and bumper element to a fully extended return position.
Claim 6
Dependent Claim
114 words
A shock absorption device of the pneumatic type comprising: a bumper element; at least one piston connected to said bumper element; a cylinder in which said piston is reciprocable; a relief valve in said cylinder at the end opposite the piston end thereof and opening at a preselected pressure on impact of said bumper; a check valve in said cylinder at the end opposite the piston end thereof opening said cylinder to atmospheric pressure on the return stroke of said piston; a vacuum port defined in said cylinder on the piston end thereof; and a source of vacuum connected to said port urging said piston and bumper element to a fully extended return position.
Claim 7
Dependent Claim
19 words
In the combination as set out in claim 3 wherein the relief valve is adjustable as to pressure setting.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |