Back to results
US 3,987,919 AGranted
General purpose logistic trailer
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsDouglas H. Weeks, David A. Bond, Warren C. Schreyer, John M. Bloodworth
Life of this patent
Estimating the term…
Abstract
A manually operable self-loading trailer of wagon configuration is descri wherein tailgate ramps are operated by jacks to elevate rear end of trailer while rear carriage is moved adjacent front carriage, and then to lower rear end of bed to near ground. Jacks incorporated in carriages permit altering of bed height and attitude and aid in converting trailer to tandem axle semi-trailer.
Claims12
A self-loading trailer comprising in combination:
- a trailer frame extending longitudinally of said trailer;
- an elongate bed, having first and second ends, supported on said trailer frame and presenting a load carrying surface;
- first and second carriage means, coupled to said trailer frame under first and second ends thereof corresponding to said first and second ends of said bed, for supporting said trailer frame and bed for rolling movement over a ground surface;
- ramp means, pivotally connected to said second end of said bed, for movement between a plurality of positions including a trailer frame and bed end elevating position and an extended position presenting a ramp surface in substantially the same plane as said load carrying surface;
- ramp jack means, connected between said trailer frame and said ramp means, for effecting movement of said ramp means between said positions;
- and said second carriage means being movable along said frame, from under said second end thereof, to a location adjacent said first carriage means while said frame and bed are held elevated at said second ends thereof by said ramp means, whereby said frame and bed are adapted to be tilted by gravity to pivot from a substantially horizontal position to an inclined position when said ramp jack means is operated to move said ramp means to said extended position.
3 more elements
A trailer of the character described comprising:
- a generally rectangular trailer frame and bed combination characterized as having a front end and a rear end and presently an upwardly facing load carrying surface, said combination including parallel, longitudinal frame rails projecting below said surface and extending substantially from said rear end to near said front end;
- a kingpin extending downwardly from adjacent said front end of said combination;
- a front carriage and a rear carriage, each comprising an upper carriage frame, a lower carriage frame, vertically guided trunnion means for interconnecting said upper and lower carriage frames, carriage jack means for adjusting the elevation and lattitude of said upper carriage frame relative to said lower carriage frame, an axle and associated wheels, spring means for connecting said axle to said lower carriage frame, guide means for connecting said upper carriage to said frame rails for movement therealong, and releasable latch means for securing said carriage in selected positions along said frame rails;
- said front carriage further comprising fifth wheel means for releasably receiving said kingpin and dirigibly supporting the front portion of said frame and bed combination, and towing tongue means for connection to a towing vehicle;
- a pair of ramps pivotally connected to said rear end of said frame and bed combination for movement through a plurality of positions including a rear end elevating position and a load surface extending ramp position;
- a pair of ramp jacks connected between said frame and bed combination and said ramps and operable to effect said movement of said ramps;
- and
- winch and cable means, mounted at said front end of said frame and bed combination, for use in moving said rear carriage to and from a frame and bed combination tilting position adjacent said front carriage, and for use in pulling a load over said ramps and onto said load carrying surface.
5 more elements
Dependencies are inferred from the claim text.