Patent US4454450A successfully refreshed from Google Patents.
Patent US4944648A successfully refreshed from Google Patents.
US4944648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer assembly
Assignee: Individual
•
Filing: 1989-06-08
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Granted: 1990-07-31
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Expires: 2009-06-08
Abstract
Abstract A trailer assembly comprises spaced wheels connected by an axle, an elongate tow bar assembly projecting forwardly from the axle, and a load carrying frame pivotally mounted on the axle for movement between an upright, ground position for loading and unloading, a first towing position in which the frame is inclined forwardly, and a second towing position in which the frame is horizontal. First and second latching mechanisms are provided for releasably latching the frame in the first and second towing positions, respectively.
Inventors
- 👤 Willard J. Parr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:54
CPC Classifications
B; B62; B62D; B62D63/00; B62D63/06; B62D63/061; B60; B60P; B60P1/00; B60P1/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
150 words
A trailer assembly for transporting a load behind a vehicle comprising: a wheel assembly comprising spaced wheels and an axle connecting the wheels; an elongate tow bar assembly projecting forwardly from the wheel assembly and including securing means at its forward end for securing said assembly to the towing point of a vehicle; a load supporting frame pivotally secured to the wheel assembly for movement between a ground position in which the frame is subtantially vertical, a first towing position in which the frame is inclined forwardly of said vertical position, and a second, flat towing position in which the frame projects horizontally from the wheel assembly in the same direction as said tow bar assembly to form a flat bed trailer; power means for moving said frame between said ground and said first positions; and a first releasable latch for releasably latching said frame in said first towing position.
Claim 2
Dependent Claim
150 words
A trailer assembly for transporting a load behind a vehicle comprising: a wheel assembly comprising spaced wheels and an axle connecting the wheels; an elongate tow bar assembly projecting forwardly from the wheel assembly and including securing means at its forward end for securing said assembly to the towing point of a vehicle; a load supporting frame pivotally secured to the wheel assembly for movement between a ground position in which the frame is subtantially vertical, a first towing position in which the frame is inclined forwardly of said vertical position, and a second, flat towing position in which the frame projects horizontally from the wheel assembly in the same direction as said tow bar assembly to form a flat bed trailer; power means for moving said frame between said ground and said first positions; and a first releasable latch for releasably latching said frame in said first towing position.
Claim 3
Dependent Claim
23 words
The assembly as claimed in claim 1, further including a second releasable latch for releasably latching said frame in said second towing position.
Claim 4
Dependent Claim
49 words
The assembly as claimed in claim 2, wherein said second latch is pivotally mounted at the forward end of said tow bar assembly and movable between an extended, rearwardly projecting position for latching engagement with said frame in said second towing position and a retracted position releasing said frame.
Claim 5
Dependent Claim
32 words
The assembly as claimed in claim 1, wherein power means acts between said tow bar assembly and said frame for urging said frame between said ground position and said first towing position.
Claim 6
Dependent Claim
93 words
The assembly as claimed in claim 4 power means comprises a lever arm extending transverse to said axle and pivotally connected to said axle at an intermediate point in its length, and a jack pivotally connected at one end to the rear end of said tow bar assembly and at the opposite end to one end of said lever arm, the opposite end of said lever arm comprising bearing means for bearing against said frame to urge said frame from said ground position towards said first towing position as said jack is extended.
Claim 7
Dependent Claim
57 words
The assembly as claimed in claim 5, wherein said frame has a horizontal cross bar at the height of said lever arm when said jack is retracted and said frame is in said ground position, and said lever arm has a notch at said opposite end on which said cross bar is seated in said ground position.
Claim 8
Dependent Claim
60 words
The assembly as claimed in claim 1, wherein said frame is generally L-shaped, comprising a longer arm which is upright in said ground position and comprises a horizontal load supporting platform in said second towing position, and a shorter arm which is horizontal in said ground position and tilted to comprise a load supporting platform in said first towing position.
Claim 9
Dependent Claim
16 words
The assembly as claimed in claim 7, wherein said shorter arm is releasably on said frame.
Claim 10
Dependent Claim
35 words
The assembly as claimed in claim 1, including leveling means at the forward end of said tow bar assembly for adjusting the level of said forward end to the level of a vehicle tow hitch.
Claim 11
Dependent Claim
42 words
The assembly as claimed in claim 1, wherein said tow bar assembly is of a length sufficient to accommodate said frame in said second towing position, and said tow bar assembly comprises means for supporting said frame in said second towing position.
Claim 12
Dependent Claim
22 words
The assembly as claimed in claim 1, wherein said frame has sockets for receiving vertical support posts in said second towing position.
Claim 13
Dependent Claim
62 words
The assembly as claimed in claim 1, wherein said frame has a first load carrying platform for supporting a load in said first towing position and a second load carrying platform perpendicular to said first platform for supporting a load in said second towing position, and said first load supporting platform is located above said wheel assembly in said first towing position.
Claim 14
Dependent Claim
16 words
The assembly as claimed in claim 1, wherein the frame is pivotally mounted on said axle.
Claim 15
Dependent Claim
19 words
The assembly as claimed in claim 13, including releasable pivot means for releasably mounting said frame on said axle.
Claim 16
Dependent Claim
55 words
The assembly as claimed in claim 13, wherein said frame has a front, load supporting side and a rear side, and includes a pair of spaced pivot arms projecting from said rear side and pivotal connecting means at the free ends of the pivot arms for pivotally connecting them at spaced positions on said axle.
Claim 17
Dependent Claim
16 words
The assembly as claimed in claim 15, wherein said axle is offset forwardly from said wheels.
Claim 18
Dependent Claim
46 words
The assembly as claimed in claim 1, wherein said first latch is pivotally mounted on the rear end of said tow bar assembly for movement between an extended, rearwardly projecting position engaging said frame in said first towing position, and a retracted position releasing said frame.
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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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |