US4750856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Car carrier
Assignee: Individual
•
Filing: 1987-01-05
•
Granted: 1988-06-14
•
Expires: 2007-01-05
Abstract
Abstract A car carrier having a bed linked to the frame of a truck for movement from a horizontal position on the frame to a tilted car loading or unloading position in a single motion entailing simultaneous upward-rearward movement of the front end of the bed and downward-rearward movement of the rear end of the bed to ground-engaging position. The terminal portion of the tilting movement of the bed automatically compresses the rear springs between the frame and rear axle. The car carrier also has a wheel lift assembly including yokes on a rearwardly extending boom which are lowered to engage and lift the front on rear wheels of a second car responsive to partial tilting of the bed and to return of the bed to horizontal position. The boom and yokes are retracted forwardly to be disposed underneath the rear portion of the bed during loading and unloading of a first car onto or from the bed. The car carrier also has load balancing wheels rearward of the rear wheels which may be moved down to firm ground engaging position to decrease the load on the rear wheels and to maintain adequate downward pressure on the front wheels for proper steering.
Inventors
- 👤 Risto J. Lapiolahti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:08
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/06; B60P3/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
356 words
A car carrier comprising a self-propelled truck having a longitudinally extending frame supported by springs on wheeled front and rear axles; a longitudinally extending car carrier bed on said frame having a front end disposed forwardly of said rear axle and a rear end disposed rearwardly of said rear axle and frame; front and rear links pivotally connected to said bed and frame, respectively forwardly and rearwardly of said rear axle; said links, when pivoted in one direction with respect to said frame, being effective to move said bed from horizontal position on said frame to tilted position whereat its front end has been moved upwardly and rearwardly and whereat its rear end has been moved downwardly and rearwardly to ground engaging position for car loading or unloading; actuating means between said frame and the linkage constituted by said bed and links to move said bed between said horizontal and tilted positions; and a wheel lift assembly having a forwardly retracted position beneath the rear end portion of said bed whereat said bed may be actuated between said horizontal and tilted positions, said assembly having a rearwardly protracted position to support the front or rear wheels of a second car above ground for towing; said assembly comprising a boom housing having a front end portion pivotally connected to said rear link between its pivotal connections to said bed and frame; a downwardly extending boom housing support link having its upper and lower ends pivotally connected to the rear end portion of said bed and to the rear end of said boom housing respectively; a boom slidable in said boom housing between said retracted and protracted positions; said boom having a cross bar at its rear end; rotatably indexable wheel engaging yokes on said cross bar which extend forwardly and rearwardly from said cross bar in the respective retracted and protracted positions of said boom; said rearwardly extending yokes in the protracted position of said boom being lowered to ground engaging position by partial rearward tilting motion of said bed by said actuating means for loading or unloading of a second car onto or from said yokes.
Claim 2
Dependent Claim
356 words
A car carrier comprising a self-propelled truck having a longitudinally extending frame supported by springs on wheeled front and rear axles; a longitudinally extending car carrier bed on said frame having a front end disposed forwardly of said rear axle and a rear end disposed rearwardly of said rear axle and frame; front and rear links pivotally connected to said bed and frame, respectively forwardly and rearwardly of said rear axle; said links, when pivoted in one direction with respect to said frame, being effective to move said bed from horizontal position on said frame to tilted position whereat its front end has been moved upwardly and rearwardly and whereat its rear end has been moved downwardly and rearwardly to ground engaging position for car loading or unloading; actuating means between said frame and the linkage constituted by said bed and links to move said bed between said horizontal and tilted positions; and a wheel lift assembly having a forwardly retracted position beneath the rear end portion of said bed whereat said bed may be actuated between said horizontal and tilted positions, said assembly having a rearwardly protracted position to support the front or rear wheels of a second car above ground for towing; said assembly comprising a boom housing having a front end portion pivotally connected to said rear link between its pivotal connections to said bed and frame; a downwardly extending boom housing support link having its upper and lower ends pivotally connected to the rear end portion of said bed and to the rear end of said boom housing respectively; a boom slidable in said boom housing between said retracted and protracted positions; said boom having a cross bar at its rear end; rotatably indexable wheel engaging yokes on said cross bar which extend forwardly and rearwardly from said cross bar in the respective retracted and protracted positions of said boom; said rearwardly extending yokes in the protracted position of said boom being lowered to ground engaging position by partial rearward tilting motion of said bed by said actuating means for loading or unloading of a second car onto or from said yokes.
Claim 3
Dependent Claim
28 words
A car carrier of claim 1 wherein said boom housing has means for longitudinally adjusting the lower end of said support link with respect to its upper end.
Claim 4
Dependent Claim
31 words
A car carrier of claim 1 wherein said support link extends substantially horizontally rearward from said boom housing in the retracted position of said assembly and tilted position of said bed.
Claim 5
Dependent Claim
83 words
A car carrier of claim 1 wherein said yokes, when indexed in rearwardly extending position, have plates movable to overlying relation on said yokes to constitute elevated horizontal ramp extensions of said bed upon partial protraction of said boom and cross bar and partial tilting of said bed to move said yokes to ground engaging position; said plates having downwardly and rearwardly inclined rear ends to preliminarily raise the wheels and corresponding end of the car being loaded onto said partially tilted bed.
Claim 6
Dependent Claim
82 words
A car carrier of claim 1 wherein said frame has a downwardly depending portion rearward of said rear axle; wherein a load balancing wheel assembly is secured to said downwardly depending portion; said wheel assembly having wheels spaced rearward of said rear wheels and supported for movement downwardly from above ground position to ground engaging position; said wheel assembly having means to forcefully move the wheels thereof downwardly into firm ground engaging contact to avoid overlaoding of said rear axle and wheels.
Claim 7
Dependent Claim
46 words
A car carrier of claim 5 wherein said means to forcefully move the wheels of said wheel assembly downwardly comprises compressed air bags; wherein said assembly has torsional spring means to raise said wheels of said wheel assembly upon release of air pressure in said bags.
Claim 8
Dependent Claim
203 words
A car carrier of claim 1 wherein said frame has a downwardly depending portion rearward of said rear axle; wherein a load balancing wheel assembly is secured to said downwardly depending portion; said assembly comprising parallel plates secured to opposite sides of said downwardly depending portion; a transverse tubular member secured to said plates; said tubular member being parallel to and spaced rearward of said rear axle and having end portions extending transversely beyond said plates; rearwardly extending arms pivotally supported by said end portions and having axles at their rear ends for the wheels of said balancing wheel assembly; said plates having brackets spaced above the rear end portions of said arms; compressed air bags between said brackets and the rear end portions of said arms operative to establish firm ground engaging contact of the wheels of said wheel assembly to avoid overloading of said rear axle and rear wheels; and torsion spring means within said tubular member fixed against rotation at its middle to said tubular member and at its ends to said arms; said spring means being operative to pivot said arms to raise the wheels of said assembly above ground upon release of air pressure in said air bags.
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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) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |