Patent US3883158A successfully refreshed from Google Patents.
US3883158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle with steerable rear wheels
Assignee: HALLOWELL HARRY C TRUSTEE IN BANKRUPTCY FOR POINTER TRUCK & TRAILER COMPANY Inc A/K/A POINTER WILLAMETTE TRAILER COMPANY Inc
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Filing: 1974-07-29
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Granted: 1975-05-13
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Expires: 1994-07-29
Abstract
Abstract A tractor supports an elongated load at one end with the load being supported at its rearward end by a carriage supported on the ground by stationary wheels and by an independently steerable set of trailing wheels. The only connection between the tractor and the carriage is the load. The load and the steerable trailing wheels are interconnected by an adjustable pivotal linkage which automatically steers the trailing wheels in response to relative rotational movement between the rearward end of the load and the carriage. The adjustment of the linkage can be made easily to change the turning radius of the vehicle for various sized loads.
Inventors
- 👤 Tyman H Fikse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:30
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
An elongated vehicle comprising: A tractor having a main frame, at least two forward steerable wheels on said main frame, rearward carriage means having forward and rearward ends and wheels supporting the carriage on the ground, first bearing means for supporting said main frame on said carriage means for movement about a first vertical axis, a trailing frame rearward of said first bearing means, second bearing means for supporting said carriage means rearward end on said trailing frame for movement about a second vertical axis, at least two steerable wheels on said trailing frame, lengthwise adjustable actuating means coupled between said main frame and said trailing frame steerable wheels for steering said trailing frame wheels in response to horizontal rotational movement of said main frame relative to said carriage means about said first vertical axis whereby the trailing frame steerable wheels will steer said trailing frame to allow turning of the vehicle about smaller radii.
Claim 2
Dependent Claim
155 words
An elongated vehicle comprising: A tractor having a main frame, at least two forward steerable wheels on said main frame, rearward carriage means having forward and rearward ends and wheels supporting the carriage on the ground, first bearing means for supporting said main frame on said carriage means for movement about a first vertical axis, a trailing frame rearward of said first bearing means, second bearing means for supporting said carriage means rearward end on said trailing frame for movement about a second vertical axis, at least two steerable wheels on said trailing frame, lengthwise adjustable actuating means coupled between said main frame and said trailing frame steerable wheels for steering said trailing frame wheels in response to horizontal rotational movement of said main frame relative to said carriage means about said first vertical axis whereby the trailing frame steerable wheels will steer said trailing frame to allow turning of the vehicle about smaller radii.
Claim 3
Dependent Claim
95 words
The vehicle of claim 1, said actuating means including a pivotal coupling joint to said main frame, pivot arm means pivotally joined to said pivotal coupling at one end, means joining the other end of the pivot arm means to said steerable wheels for fore and aft movement relative thereto whereby the pivot arm means can compensate for changing distances between said pivotal coupling and said trailing frame steerable wheels, and adjusting means for varying the distance between said pivotal coupling and said first vertical axis for varying the effective turning radius of the vehicle.
Claim 4
Dependent Claim
167 words
The vehicle of claim 1, said main frame including an elongated load and a set of forward and rearward load supports, said first bearing means joining said carriage means and said rearward load support, said actuating means including a rearwardly extending extension bar on said rearward load support and a pivot arm, coupling means pivotally connecting said pivot arm to said extension bar, said trailing frame including an axle frame, said actuating means including a bracket mounted to said axle frame for pivotal movement about a horizontal axis for coupling said axle frame to said pivot arm, said extension arm including adjusting means for positioning said coupling means lengthwise of said carriage means for changing the ratio of turning radii between said first vertical rotational axis and said coupling means and said second vertical rotational axis of said trailing frame and said coupling means to vary the turning path of said trailing vehicle steerable wheels in response to varying distances of pivotal movement of said coupling means.
Claim 5
Dependent Claim
34 words
The vehicle of claim 3, said coupling means including lateral positioning means for setting the pivotal connection laterally of the trailing frame to assure accurate tracking of the steerable wheels behind said main frame.
References Cited (Backward Citations)
US3102735A
Cited
US3156487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |