Patent US3797872A successfully refreshed from Google Patents.
US3797872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bumper for vehicles
Assignee: Toyota Motor Corp
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Filing: 1971-12-20
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Granted: 1974-03-19
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Expires: 1991-12-20
Abstract
Abstract A bumper device for automobiles and other vehicles comprising at least one pair of bumper plates provided symmetrically on the front and rear sides or right and left sides of a vehicle body, and at least one pair of piston cylinder mechanisms mounted on front and rear sides or right and left sides of the vehicle body for supporting one pair of bumper plates. The device further comprises at least one pair of connection lines for interconnecting the corresponding piston cylinder mechanisms and filled with fluid, and at least one pair of pressure reducing valves each mounted between one of the pair of piston cylinder mechanisms and one of the pair of connection lines.
Inventors
- 👤 T Watanabe
- 👤 H Konishi
- 👤 K Chiku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:41
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R19/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A bumper device for automobiles and other vehicles comprising at least one pair of bumper plates provided symmetrically on opposite first and second sides of a vehicle body, at least one pair of piston cylinder mechanisms secured on said first and second sides of the vehicle body for supporting said bumper plates, at least one pair of connection lines for interconnecting the corresponding piston cylinder mechanisms and filled with fluid, at least one pair of plates secured to the cylinders of said piston cylinder mechanisms and connected between the pistons of said piston cylinder mechanisms and said connection lines, each of said plates having an orifice in the central portion thereof, the inner diameter of said orifice being smaller than the inner diameter of said connection lines, a first pair of coil springs mounted between rear surfaces of said bumper plates and front ends of the cylinders of the pair of piston cylinder mechanisms, and a second pair of coil springs mounted between inner front ends of the cylinders and pistons of the pair of piston cylinder mechanisms.
Claim 2
Dependent Claim
178 words
A bumper device for automobiles and other vehicles comprising at least one pair of bumper plates provided symmetrically on opposite first and second sides of a vehicle body, at least one pair of piston cylinder mechanisms secured on said first and second sides of the vehicle body for supporting said bumper plates, at least one pair of connection lines for interconnecting the corresponding piston cylinder mechanisms and filled with fluid, at least one pair of plates secured to the cylinders of said piston cylinder mechanisms and connected between the pistons of said piston cylinder mechanisms and said connection lines, each of said plates having an orifice in the central portion thereof, the inner diameter of said orifice being smaller than the inner diameter of said connection lines, a first pair of coil springs mounted between rear surfaces of said bumper plates and front ends of the cylinders of the pair of piston cylinder mechanisms, and a second pair of coil springs mounted between inner front ends of the cylinders and pistons of the pair of piston cylinder mechanisms.
Claim 3
Dependent Claim
22 words
A bumper device claimed in claim 1 wherein said bumper plates are provided on front and rear ends of a vehicle body.
Claim 4
Dependent Claim
31 words
A bumper device claimed in claim 1 wherein said bumper plates are provided on right and left sides of a vehicle body as viewed from the front end of the vehicle.
Claim 5
Dependent Claim
31 words
A bumper device as defined in claim 1 further comprising a fluid chamber including a diaphragm arranged between the piston of a piston cylinder mechanism and said plate having said orifice.
Claim 6
Dependent Claim
13 words
A bumper device as defined in claim 4 wherein said fluid is oil.
References Cited (Backward Citations)
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |