Patent ID: 8066259
Filing Date: 2011-11-29
Classification: B66F

Abstract:
1. A hydraulic jack comprising: a saddle mounted on a frame movable from a first lowered position to a second lifted position; hydraulic power means on the frame engaging said saddle adapted to raise and lower the same when actuated; lowering control means on said frame for controlling the descent of said saddle during lifting of the same in case of failure or malfunction of said power means during raising of said saddle, said frame including a pair of horizontally extending spaced side walls each having an upper edge and each having substantially vertical planer inside and outside walls and said lowering control means including a plurality of spaced grooves extending horizontally along at least one of the inside walls of one of said side walls of said frame below the upper edge thereof and forming an integral part of said inside wall, and at least one cylindrical roller mounted on said frame between said side walls directly engaging said spaced grooves and movable horizontally along said spaced grooves in a rolling motion when said saddle is raised to a lifted position; and release means engaging said lowering control means for releasing the same when said saddle is in a raised position, said release means including a pivotally mounted lever movable from a first stored position disengaged from said lowering control means to a second position engaging said lower control means to release the same.