Patent ID: 6170802
Filing Date: 2001-01-09
Classification: B66C

Abstract:
A convertible lifting device for enabling heavy objects to be picked up and moved from one place to another comprising, in combination:a base comprised of a pair of elongated bars with wheels on opposing ends thereof, a pair of cross plates extending between the elongated bars adjacent one end of the base, the pair of cross plates having a receiving collar secured thereto, the collar having an open forward end directed forwardly with respect to the base, the collar having an aperture through a side wall thereof for removably receiving a locking pin therein;a vertical stanchion coupled with respect to the base, the vertical stanchion including a lower portion and an upper portion, the lower portion having an L-shaped support secured to a lower end thereof, the L-shaped support having a horizontal portion dimensioned for being received within the open forward end of the receiving collar of the base, the horizontal portion having an aperture therethrough for aligning with the aperture in the receiving collar for receiving a locking pin therethrough, an open upper end of the lower portion telescopically receiving the upper portion therein, the lower portion having a gear disposed therein for engaging threads formed on the upper portion, the gear being connected with a crank whereby rotation of the crank will rotate the gear so as to selectively raise and lower the upper portion with respect to the lower portion;a horizontal stanchion pivotally coupled with respect to the vertical stanchion, the horizontal stanchion including an inner portion and an outer portion, the inner portion being pivotally coupled with an upper end of the upper portion of the vertical stanchion, the inner portion having an open outer end for slidably receiving the outer portion therein, the inner portion and the outer portion having a plurality of apertures therethrough for selectively aligning for receiving a locking pin therethrough so as to fix the outer portion with respect to the inner portion, an outer end of the outer portion having a hook coupled thereto;a hydraulic ram coupled between the vertical stanchion and the horizontal stanchion, the ram having a lower end pivotally secured to the upper portion of the vertical stanchion, an upper end of the ram being couplable to one of a plurality of tabs secured to the inner portion of the horizontal stanchion;a hydraulic pump coupled with the vertical stanchion in communication with the hydraulic ram, the pump having a handle coupled thereto to facilitate raising and lowering of the hydraulic ram.