US3860255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift trailer
Assignee: Individual
•
Filing: 1973-12-03
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Granted: 1975-01-14
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Expires: 1993-12-03
Abstract
Abstract A lift trailer, including hitch means for attachment to a tow vehicle, comprising generally a main frame including a tongue portion providing winch means, a pair of stub shafts projecting outwardly from the opposed side rails of the main frame to carry a pair of wheels, a transverse bar, connecting between the side rails rearwardly of the wheels, a load-carrying bed, fixed to the rear end of a secondary frame, journaled to the transverse bar, said secondary frame including a forwardly extending tongue portion providing latch means for detachable connection to the tongue of the main frame. The trailer structure is balanced in a manner whereby the load-carrying bed and secondary frame drop to the ground and lie flat thereon when the tongues are unlatched. At the same time, the main frame pivots about the axis of the wheels and assumes a forwardly, upwardly extending attitude. The winch means is actuated to bring the two frame structures back into alignment.
Inventors
- 👤 Rafael Rodriguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:52
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/06; B60P3/07; B62; B62D; B62D53/00; B62D53/04; B62D53/06; B62D53/061; B62D53/062
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
339 words
A lift trailer for selective coupled engagement with a tow vehicle comprising, A. a main frame including, 1. an enlarged rear portion providing, a pair of spaced apart rear side rails, 2. a forwardly extending tongue portion connecting to said rear side rails, 3. a pair of axially aligned wheel spindles, fixed to and extending outwardly from the respective rear side rails to mount a pair of wheels, 4. a transverse bar, fixed between the rear ends of said rear side rails, substantially rearwardly of said wheel spindles; B. a secondary frame including a forwardly extending tongue portion; C. load-carrying means fixed to said secondary frame; D. means to rotatably journal said load-carrying means and secondary frame to said transverse bar; E. latch means for selectively latching said main frame and secondary frame to said transverse bar; F. latch means for selectively latching said main frame and secondary frame tongues to maintain said frames in a generally coplanar, horizontal disposition above the ground level or unlatching said tongues relative to each other to permit said secondary frame and load-carrying means to drop to ground level and to simultaneously tilt said main frame forwardly and upwardly; G. leg means pivotally connected to said main frame tongue to maintain the trailer in a generally horizontal attitude when said tongues are latched; H. winch means connected to said secondary frame tongue; I. pulley means on said main and secondary frame tongues; J. cable means from said winch, extending around said pulley means to realign said frames upon actuation of said winch, with said latch means in an unlatched condition; K. said pulley means comprising a first pulley mounted atop the forward end of said main frame tongue and a second pulley mounted relative to the forward end of said secondary frame tongue; L. said cable means comprising a cable extending outwardly from said winch, upwardly and over said first pulley, downwardly and around said second pulley and upwardly to a point of attachment to the forward end of said main frame tongue.
Claim 2
Dependent Claim
339 words
A lift trailer for selective coupled engagement with a tow vehicle comprising, A. a main frame including, 1. an enlarged rear portion providing, a pair of spaced apart rear side rails, 2. a forwardly extending tongue portion connecting to said rear side rails, 3. a pair of axially aligned wheel spindles, fixed to and extending outwardly from the respective rear side rails to mount a pair of wheels, 4. a transverse bar, fixed between the rear ends of said rear side rails, substantially rearwardly of said wheel spindles; B. a secondary frame including a forwardly extending tongue portion; C. load-carrying means fixed to said secondary frame; D. means to rotatably journal said load-carrying means and secondary frame to said transverse bar; E. latch means for selectively latching said main frame and secondary frame to said transverse bar; F. latch means for selectively latching said main frame and secondary frame tongues to maintain said frames in a generally coplanar, horizontal disposition above the ground level or unlatching said tongues relative to each other to permit said secondary frame and load-carrying means to drop to ground level and to simultaneously tilt said main frame forwardly and upwardly; G. leg means pivotally connected to said main frame tongue to maintain the trailer in a generally horizontal attitude when said tongues are latched; H. winch means connected to said secondary frame tongue; I. pulley means on said main and secondary frame tongues; J. cable means from said winch, extending around said pulley means to realign said frames upon actuation of said winch, with said latch means in an unlatched condition; K. said pulley means comprising a first pulley mounted atop the forward end of said main frame tongue and a second pulley mounted relative to the forward end of said secondary frame tongue; L. said cable means comprising a cable extending outwardly from said winch, upwardly and over said first pulley, downwardly and around said second pulley and upwardly to a point of attachment to the forward end of said main frame tongue.
Claim 3
Dependent Claim
11 words
a forwardly extending tongue portion connecting to said rear side rails,
Claim 4
Dependent Claim
11 words
a forwardly extending tongue portion connecting to said rear side rails,
Claim 5
Dependent Claim
33 words
The lift trailer as defined in claim 1 wherein the portion of said main frame behind the axis of said wheel spindles is heavier in weight than the portion forwardly of said axis.
Claim 6
Dependent Claim
17 words
The lift trailer as defined in claim 1 wherein said leg means comprises a manually operated jack.
Claim 7
Dependent Claim
24 words
a pair of axially aligned wheel spindles, fixed to and extending outwardly from the respective rear side rails to mount a pair of wheels,
Claim 8
Dependent Claim
24 words
a pair of axially aligned wheel spindles, fixed to and extending outwardly from the respective rear side rails to mount a pair of wheels,
Claim 9
Dependent Claim
270 words
a transverse bar, fixed between the rear ends of said rear side rails, substantially rearwardly of said wheel spindles; B. a secondary frame including a forwardly extending tongue portion; C. load-carrying means fixed to said secondary frame; D. means to rotatably journal said load-carrying means and secondary frame to said transverse bar; E. latch means for selectively latching said main frame and secondary frame to said transverse bar; F. latch means for selectively latching said main frame and secondary frame tongues to maintain said frames in a generally coplanar, horizontal disposition above the ground level or unlatching said tongues relative to each other to permit said secondary frame and load-carrying means to drop to ground level and to simultaneously tilt said main frame forwardly and upwardly; G. leg means pivotally connected to said main frame tongue to maintain the trailer in a generally horizontal attitude when said tongues are latched; H. winch means connected to said secondary frame tongue; I. pulley means on said main and secondary frame tongues; J. cable means from said winch, extending around said pulley means to realign said frames upon actuation of said winch, with said latch means in an unlatched condition; K. said pulley means comprising a first pulley mounted atop the forward end of said main frame tongue and a second pulley mounted relative to the forward end of said secondary frame tongue; L. said cable means comprising a cable extending outwardly from said winch, upwardly and over said first pulley, downwardly and around said second pulley and upwardly to a point of attachment to the forward end of said main frame tongue.
Claim 10
Dependent Claim
270 words
a transverse bar, fixed between the rear ends of said rear side rails, substantially rearwardly of said wheel spindles; B. a secondary frame including a forwardly extending tongue portion; C. load-carrying means fixed to said secondary frame; D. means to rotatably journal said load-carrying means and secondary frame to said transverse bar; E. latch means for selectively latching said main frame and secondary frame to said transverse bar; F. latch means for selectively latching said main frame and secondary frame tongues to maintain said frames in a generally coplanar, horizontal disposition above the ground level or unlatching said tongues relative to each other to permit said secondary frame and load-carrying means to drop to ground level and to simultaneously tilt said main frame forwardly and upwardly; G. leg means pivotally connected to said main frame tongue to maintain the trailer in a generally horizontal attitude when said tongues are latched; H. winch means connected to said secondary frame tongue; I. pulley means on said main and secondary frame tongues; J. cable means from said winch, extending around said pulley means to realign said frames upon actuation of said winch, with said latch means in an unlatched condition; K. said pulley means comprising a first pulley mounted atop the forward end of said main frame tongue and a second pulley mounted relative to the forward end of said secondary frame tongue; L. said cable means comprising a cable extending outwardly from said winch, upwardly and over said first pulley, downwardly and around said second pulley and upwardly to a point of attachment to the forward end of said main frame tongue.
Claim 11
Dependent Claim
38 words
The lift trailer as defined in claim 1 including an arm pivotally connected at a first end to the forward end portion of said secondary frame tongue and having said winch means fixed to a second end thereof.
Claim 12
Dependent Claim
50 words
The lift trailer as defined in claim 1 wherein said forwardly extending tongue portion of said main frame is comprised of a pair of relatively closely spaced apart, parallel rails connecting respectively to said rear side rails and including a nose rail connecting between the forward ends of said pair.
Claim 13
Dependent Claim
37 words
The lift trailer as defined in claim 5 wherein said secondary, forwardly extending tongue portion generally bisects the space between said pair of rails comprising said main frame tongue portion and stops short of said nose rail.
Claim 14
Dependent Claim
52 words
The lift trailer as defined in claim 6 wherein said latch means comprises a latch bar, pivotally connected intermediate its length to the top of said secondary frame tongue whereby it may selectively rotate into or out of engagement with the tops of said pair of rails comprising said main frame tongue.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |