US 4,690,248 AGranted

Portable hoist

OwnerWalter H. Killeeninventor

Life of this patent

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Abstract

A collapsible frame of a general ladder shape having elongated side rails connected by transverse support members. The frame defines an inverted U-shaped frame when in its unfolded operative position. A winch and pulleys attached to the frame are used for lifting or lowering a load. One downwardly extending leg of the frame has telescoping legs and wheels to provide for height adjustment and use as a hand truck for transporting a load. The second leg of the frame may be connected to a ladder bracket and ladder for lifting a load to an elevated location.

Claims6

Dependent claims

A portable apparatus for lifting, transporting and distributing a load, comprising:

a. a horizontal frame support having parallel side rails connected by transverse supporting members;
b. a first ladder shaped leg, having a pair of side rails connected by transverse supports and extending transversely away from said side rails of said horizontal support, thereby forming a base on said first leg being wider than said horizontal frame support, said first leg being, pivotally connected to a first end of said horizontal frame support and moveable between a first folded inoperative position and a second unfolded operative position, said first leg extending downwardly from said horizontal frame support when in said second operative position, said first leg including first and second telescopically mating members, whereby the length of said first leg is selectively adjustable;
c. a second ladder shaped leg, having a pair of spaced parallel side members connected by transverse supports, and pivotally connected to the other end of said horizontal frame support and moveable between a first folded inoperative position and a second unfolded operative position, said second leg extending downwardly from and substantially perpendicular to said horizontal frame member when in said second operative position;
d. means operatively connected to said first leg and said horizontal support for lifting and lowering a load, including a first pulley fixedly mounted on said horizontal frame member and a second pulley mounted on said horizontal frame member and moveable longitudinally therealong;
e. means connected to said first leg for transporting said apparatus and said load;
f. means for communication of said second leg with the ground, forming a support for lifting a load, said communication means comprising a generally ladder shaped bracket engageable with a ladder-like structure and said second leg, and being selectively adjustable in length whereby said load is distributed over both said first and second leg members and the ground when said first leg rests on a surface when is elevated with respect to the ground;
and
g. means for locking said first and second legs in said second unfolded operative position, further comprising:
a. a pair of spring loaded latches extending through said side rails of said horizontal support;
b. said first leg having apertures for receiving said latches;
c. a pair of spring loaded latches extending through said side members of said second leg;
and
d. a pair of flanges connected to said side rails of said horizontal support having apertures therethrough for receiving said latches said portable apparatus in said first folded inoperative position is transportable on the back of a user.

10 more elements

Dependencies are inferred from the claim text.

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Abstract

A portable apparatus for lifting, transporting and distributing a load, comprising:

a. a horizontal frame support having parallel side rails connected by transverse supporting members;
b. a first ladder shaped leg, having a pair of side rails connected by transverse supports and extending transversely away from said side rails of said horizontal support, thereby forming a base on said first leg being wider than said horizontal frame support, said first leg being, pivotally connected to a first end of said horizontal frame support and moveable between a first folded inoperative position and a second unfolded operative position, said first leg extending downwardly from said horizontal frame support when in said second operative position, said first leg including first and second telescopically mating members, whereby the length of said first leg is selectively adjustable;
c. a second ladder shaped leg, having a pair of spaced parallel side members connected by transverse supports, and pivotally connected to the other end of said horizontal frame support and moveable between a first folded inoperative position and a second unfolded operative position, said second leg extending downwardly from and substantially perpendicular to said horizontal frame member when in said second operative position;
d. means operatively connected to said first leg and said horizontal support for lifting and lowering a load, including a first pulley fixedly mounted on said horizontal frame member and a second pulley mounted on said horizontal frame member and moveable longitudinally therealong;
e. means connected to said first leg for transporting said apparatus and said load;
f. means for communication of said second leg with the ground, forming a support for lifting a load, said communication means comprising a generally ladder shaped bracket engageable with a ladder-like structure and said second leg, and being selectively adjustable in length whereby said load is distributed over both said first and second leg members and the ground when said first leg rests on a surface when is elevated with respect to the ground;
and
g. means for locking said first and second legs in said second unfolded operative position, further comprising:
a. a pair of spring loaded latches extending through said side rails of said horizontal support;
b. said first leg having apertures for receiving said latches;
c. a pair of spring loaded latches extending through said side members of said second leg;
and
d. a pair of flanges connected to said side rails of said horizontal support having apertures therethrough for receiving said latches said portable apparatus in said first folded inoperative position is transportable on the back of a user.

10 more elements