US 5,348,439 AGranted

Portable unloading device

OwnerGeorge F. Kuhn, Jr.inventor

Life of this patent

Estimating the term…

Abstract

A truck has been adapted to receive the unloading device of the present invention. The unloading device includes a removable rotatable jib frame which is mounted on the partition walls of the truck. An elongated hollow lever arm member is attached to the jib frame for unloading a load. The lever arm member utilizes a mechanical advantage for unloading a load. It incorporates a braking system together with a chain retraction system for ease in safety of operation.

Claims11

Dependent claims

In combination with a truck including a frame, a load containing body means affixed to said frame, said body means including a truck bed affixed to said frame, transverse partition wall means disposed in predetermined position within said body means, said partition wall means forming a plurality of outwardly opening bays, slidable door means for engaging said partition wall means and covering said outwardly opening bays, said partition wall means having vertical U-shaped channel means therein disposed on opposite sides thereof, said channel means for receiving said slidable door means, the improvement which comprises:

(a) said partition wall means having wall aperture means passing therethrough opening into said oppositely disposed U-shaped channel means;
(b) a portable unloading device comprising a removable rotatable jib frame means including vertical extension means, a first rotatable aperture engaging means rotatably mounted proximate a first of said vertical extension means, said first aperture engaging means slidably engaging a first of said wall aperture means, a second rotatable aperture engaging means rotatably mounted proximate a second of said vertical extension means, said second aperture engaging means slidably engaging a second of said wall aperture means, said first vertical extension means and said second vertical extension means in coaxial alignment with one another, said jib frame including a first hook means for carrying a load;
(c) an elongated hollow lever arm men%bet including means for engaging said load affixed proximate one end thereof, said hollow lever arm member further includes retraction means for retracting said first hook engaging means automatically when said hollow lever arm member is not supporting a load, lever arm handle means affixed proximate the other end of said hollow lever arm member, controlled lever arm lowering means for engaging said first hook means of said rotatable jib frame means and for lowering said load in a controlled manner, said controlled lever arm lowering means comprises extendable first hook engaging means for engaging said first hook means, brake means for controlling the descent of said hollow lever arm member when lowering a load.

Dependencies are inferred from the claim text.

patentgrep

Loading patent…

Abstract

(a) said partition wall means having wall aperture means passing therethrough opening into said oppositely disposed U-shaped channel means;
(b) a portable unloading device comprising a removable rotatable jib frame means including vertical extension means, a first rotatable aperture engaging means rotatably mounted proximate a first of said vertical extension means, said first aperture engaging means slidably engaging a first of said wall aperture means, a second rotatable aperture engaging means rotatably mounted proximate a second of said vertical extension means, said second aperture engaging means slidably engaging a second of said wall aperture means, said first vertical extension means and said second vertical extension means in coaxial alignment with one another, said jib frame including a first hook means for carrying a load;
(c) an elongated hollow lever arm men%bet including means for engaging said load affixed proximate one end thereof, said hollow lever arm member further includes retraction means for retracting said first hook engaging means automatically when said hollow lever arm member is not supporting a load, lever arm handle means affixed proximate the other end of said hollow lever arm member, controlled lever arm lowering means for engaging said first hook means of said rotatable jib frame means and for lowering said load in a controlled manner, said controlled lever arm lowering means comprises extendable first hook engaging means for engaging said first hook means, brake means for controlling the descent of said hollow lever arm member when lowering a load.