US3929237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-storing dolly
Assignee: Individual
•
Filing: 1974-02-13
•
Granted: 1975-12-30
•
Expires: 1994-02-13
Abstract
Abstract A dolly for supporting one end of wrecked automobiles during towing is arranged to be stored beneath the towing vehicle when not in use and is constructed for easy projection and retraction from and to its stored position.
Inventors
- 👤 Alvin C Schaedler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:11
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/12; B60P3/125; B60P3/127
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
In combination with a vehicle having a chassis, a two-wheel dolly, structure for coupling said dolly to said chassis, means extensibly and retractably mounting said structure on said chassis for movement between a stored ground elevated inoperative position substantially forward of the rear end of said chassis and an operative position near the rear end of said chassis, a telescoping draft tongue pivotally connected at its forward end to said coupling structure and at its rear end to said dolly and being extensible from its stored fully-telescoped condition wherein its rear end and said dolly are near the rear of said chassis when said coupling structure is in its stored position and its fully extended condition wherein said dolly is spaced a substantial distance rearwardly from said chassis.
Claim 2
Dependent Claim
128 words
In combination with a vehicle having a chassis, a two-wheel dolly, structure for coupling said dolly to said chassis, means extensibly and retractably mounting said structure on said chassis for movement between a stored ground elevated inoperative position substantially forward of the rear end of said chassis and an operative position near the rear end of said chassis, a telescoping draft tongue pivotally connected at its forward end to said coupling structure and at its rear end to said dolly and being extensible from its stored fully-telescoped condition wherein its rear end and said dolly are near the rear of said chassis when said coupling structure is in its stored position and its fully extended condition wherein said dolly is spaced a substantial distance rearwardly from said chassis.
Claim 3
Dependent Claim
66 words
The combination according to claim 1 wherein said telescoping tongue is hydraulically operated including a telescoping stiff arm device extending parallel to said tongue and being connected to said coupling structure and to said dolly at points vertically spaced from the corresponding connections of said tongue, said telescoping stiff arm being lockable in its extended position to stabilize said dolly against tilting about its wheel axes.
Claim 4
Dependent Claim
52 words
The combination according to claim 2 wherein said mounting means includes a pair of transversely spaced longitudinally extending hydraulic cylinders mounted on said chassis with their rear ends a substantial distance forward of the rear end of the vehicle and having their pistons rigidly connected at their rear ends to said structure.
Claim 5
Dependent Claim
48 words
The combination according to claim 1 wherein an apron element is pivotally mounted, on a transverse axis, on the rear of said dolly for pivotal movement, when said dolly is in operative position, between a vertical inoperative position, an inclined ramp-forming loading position, and a horizontal loaded position.
Claim 6
Dependent Claim
51 words
The combination according to claim 4 wherein said dolly has a generally horizontal frame comprising spaced front and rear transverse members, said apron element being pivotally mounted on said rear transverse member and being adapted to rest on and be supported by said front transverse member when in horizontal loaded position.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |