Patent ID: 6050548
Filing Date: 2000-04-18
Classification: B66C

Abstract:
A lifting assembly comprising:a collapsible lifting structure; anda detachable wheel assembly;said collapsible lifting structure including a forked base member including two legs attached at a mid-portion having two spaced, upwardly projecting parallel attachment plates each provided with securing pin apertures, a hollow vertical support tube between said two spaced, upwardly projecting parallel attachment plates and having two pin securing apertures, a pair of leg securing pins positionable through said two securing apertures, both securing pin apertures being alignable with said two securing pin apertures of said attachment plates when said hollow vertical support tube is oriented perpendicular to said legs and one securing pin aperture being alignable with one of said two securing pin apertures of said attachment plates when said hollow vertical support tube is oriented parallel to said legs, a derrick structure including a vertical shaft slidably positioned within said hollow vertical support tube and securable with respect thereto with a shaft securing pin and an extension arm extending from a top end of said vertical shaft at an obtuse angle, a pulley assembly suspended from a far end of said extension arm, a height adjustable ratchet winch assembly adjustably attached to said vertical shaft and including a vertical shaft attachment mechanism, a rotatably mounted cable spool having a spool handle, and a cable having a first end attached to said cable spool and a second end threaded through said pulley assembly and attached to a connecting hook;said detachable wheel assembly including two wheels attached to a U-shaped bracket having two spaced wheel securing plates with wheel connecting apertures formed therethrough and spaced apart sufficiently such that said two spaced, upwardly projecting parallel attachment plates of said forked base member fit therebetween and are secured thereto with said leg securing pins;said vertical shaft being secured to said hollow vertical support tube in a first orientation for use with said extension arm positioned above and between said two legs of said forked base member and a second orientation for storage with said extension arm offset ninety degrees from its orientation in said first orientation.