Patent ID: 6076434
Filing Date: 2000-06-20
Classification: B25B

Abstract:
A gear operated, individually adjustable double ended wrench having a handgrip with two sides, first and second ends and a grip channel; a first work engaging means at the first handgrip end, a first adjustment means in the handgrip associated with the first work engaging means, and a first drive means for independent adjustment of the first work engaging means; a closed box wrench at the second handgrip end comprising a fixed jaw and a movable jaw that can be repositioned in opposition to the fixed jaw; the closed box wrench further comprising a pair of rectangular slots formed between the second handgrip end and a jaw cover plate, a corresponding pair of tracks projecting from the moveable jaw, each of the pair of tracks received by the corresponding pair of slots for guiding the moveable jaw when opening or closing the closed box wrench; a second adjustment means in the handgrip for the closed box wrench and independent adjustment thereof by a rectilinear manual motion of the second adjustment means along the handgrip; a second drive means for independent adjustment of the closed box wrench, comprising the grip channel having a helical grooved shaft retained in longitudinal, rotatable position in the channel on a plurality of end bearing inserts held in place by a grip cover plate; the second adjustment means articulating with grooved shaft; a drive gear connected to the grooved shaft near a forward end thereof, said drive gear engaging a worm drive gear; a rotatable worm pinion connected forward of the worm drive gear essentially parallel with the shaft; the worm pinion positioned on a plurality of end bearing blocks retained by the jaw cover plate over a closed box cavity, the pinion having an associated rack in a rectangular shaped hole to maintain a rack alignment in said cavity; the rack, essentially parallel to the shaft, interconnected with the movable jaw through a compression load bearing, whereby linear action on the second adjustment means rotates the helical geared shaft, the drive gear, worm drive gear and worm pinion, for linear movement of the rack and consequent movement of said bearing and movable jaw in relation to the fixed jaw for opening or closing of the closed box wrench.