US3649048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tow-bar assembly
Assignee: HUNSLET HOLDINGS Ltd
•
Filing: 1970-02-10
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Granted: 1972-03-14
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Expires: 1990-02-10
Abstract
Abstract A tow-bar assembly comprising a fluid-pressure actuated piston and cylinder unit, a mounting bracket and a tow-bar in which the piston or cylinder of the piston and cylinder unit and one end of the tow-bar are connected to the mounting bracket. The connection between the tow-bar and the mounting bracket is such as to permit the tow-bar to pivot relative to the bracket in horizontal and vertical planes. A further fluid-pressure actuated piston and cylinder unit may also be provided for raising and lowering the other end of the tow-bar as may be required when connecting the assembly between two vehicles.
Inventors
- 👤 Philip Garnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:27
CPC Classifications
B; B60; B60D; B60D1/00; B60D1/24; B60D1/249; B60D1/14; B60D1/145; B60D1/155
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
A tow-bar assembly comprising a fluid-pressure actuated piston and cylinder unit, a mounting bracket and a tow-bar, the piston or cylinder of said unit and one end of said tow-bar being connected to the mounting bracket and the connection between said bracket and the tow-bar being such as to permit the tow-bar to pivot relative to the bracket in horizontal and vertical planes.
Claim 2
Dependent Claim
63 words
A tow-bar assembly comprising a fluid-pressure actuated piston and cylinder unit, a mounting bracket and a tow-bar, the piston or cylinder of said unit and one end of said tow-bar being connected to the mounting bracket and the connection between said bracket and the tow-bar being such as to permit the tow-bar to pivot relative to the bracket in horizontal and vertical planes.
Claim 3
Dependent Claim
62 words
A tow-bar assembly as claimed in claim 1 wherein there is provided a further fluid-pressure actuated piston and cylinder unit which is connected to said mounting bracket and to said tow-bar intermediate the ends thereof and which is adapted in use to raise or lower the other end of the tow-bar as may be required when connecting the assembly between two vehicles.
Claim 4
Dependent Claim
40 words
A tow-bar assembly as claimed in claim 1 wherein the component of the first-mentioned piston and cylinder unit not connected to said mounting bracket is adapted to be connected in a towing vehicle or in a vehicle to be towed.
Claim 5
Dependent Claim
26 words
A tow-bar assembly as claimed in claim 1 wherein said mounting bracket is arranged so that an auxiliary tow-bar can be connected to said mounting bracket.
Claim 6
Dependent Claim
28 words
A tow-bar assembly as claimed in claim 4 wherein said auxiliary tow-bar is connected to said mounting bracket when said first-mentioned tow-bar is disposed in an inoperative position.
Claim 7
Dependent Claim
25 words
A tow-bar assembly as claimed in claim 1 wherein means are provided in association with the first-mentioned piston and cylinder unit for reducing shock loading.
Claim 8
Dependent Claim
33 words
A tow-bar assembly as claimed in claim 6 wherein said means incorporates a fluid pressure release valve connected between the two axial ends of the cylinder of said first-mentioned piston and cylinder unit.
Claim 9
Dependent Claim
38 words
A tow-bar assembly as claimed in claim 6 wherein said means includes a piston rod which is resiliently connected to the piston of said unit so as to permit a limited relative movement therebetween in either axial direction.
Claim 10
Dependent Claim
19 words
A tow-bar assembly as claimed in claim 1 wherein said tow-bar is formed intermediate its ends with a joint.
Claim 11
Dependent Claim
24 words
A tow-bar assembly as claimed in claim 1 wherein the end of said tow-bar remote from said mounting bracket is provided with a hook.
Claim 12
Dependent Claim
17 words
A tow-bar assembly as claimed in claim 10 wherein said hook is provided with a pivotable catch.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |