US 4,565,470 AGranted

Apparatus for hand drilling

AssigneeWilliam E. Mouzavires

InventorKarl A. Karlsson

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Abstract

Method and apparatus for hand drilling wherein the reaction torque generated in the hand drill from the workpiece is transferred to a support for the drill and then back into the workpiece to not only divert stress from the operator's body but also to hold the workpiece in fixed position. In one preferred embodiment, the drill support includes a holder, means mounting the body of the drill in the holder, and an elongated load transfer number on which the holder is mounted for vertical movement therealong. In use, the lower end of the load transfer member is located adjacent the side of the workpiece so that the equal but oppositely directed torques generated in the workpiece and the drill respectively will hold the workpiece fixed against the side of the load transfer member while the torque (reaction) generated in the drill is transferred away from the operator's body to the load transfer member and then into the workpiece.

Claims21

Dependent claims

Portable hand-drilling apparatus comprising in combination, a portable hand drill having a body and a chuck mounted to the body for rotation, at least one handle projecting from the body above the chuck for manipulating the drill, a yoke positioned between the handle and chuck and releasably fixed to the body against rotation and having an arm projecting laterally therefrom, an elongated rigid load transfer member having a free end adapted to be freely engaged against a side of a workpiece to be drilled, means mounting the arm to the load transfer member against rotation relative thereto while permitting the arm together with the yoke and drill to move along the load transfer member such that during a drilling operation the free end of the load transfer member is placed against the side of the workpiece to transfer torque through the load transfer member and laterally onto the workpiece to divert torque stress from the user's body while securing the hand drill to the workpiece without positively attaching the load transfer member to the workpiece, said means including a holder receiving said arm for slidable movement of said arm relative to the holder into one of a plurality of selectable positions, said holder having mounting means slidably receiving the load transfer member to allow the holder together with the arm and drill body to move along the load transfer means, and wherein there is further included means releasably fixing the arm to said holder in a selected position.

Portable hand-drilling apparatus comprising in combination, a portable hand drill including a body having a chuck and at least one handle projecting from the body above the chuck for manipulating the drill, a portable load transfer member having a free end adapted to be engaged against a side of a workpiece to be drilled to transfer torque to the workpiece during a drilling operation, and means affixable to the body of the hand drill for mounting the body to the load transfer member for movement along the load transfer member during a drilling operation while the load transfer member is engaged against the side of the workpiece to transfer torque through the load transfer member and laterally into the workpiece thereby diverting torque from the user's body while securing the hand drill relative to the workpiece without positively attaching the load transfer member to the workpiece, said means including a yoke fixed to said body between said handle and chuck, a holder, an arm slidably received on said holder, one of said arm and holder being fixed to said yoke and projecting laterally from said body, the other of said holder and arm having fixed thereto a mounting means slidably receiving the load transfer member to mount the drill body for movement along the load transfer member, said holder and arm being slidable relative to each other to position the load transfer member at a selected distance from the body, and wherein there is further included means for releasably fixing the arm and holder relative to each other in any one of a number of selected positions, and means for releasably retaining said mounting means on said load transfer member while permitting slidable movement of said arm and holder together with said drill body along said load transfer means.

Portable hand-drilling apparatus for use with a portable hand drill having a body including a chuck and at least one handle projecting from the body above the chuck for manipulating the drill, the apparatus comprising an elongated rigid load transfer member having a free end, and means affixable to the body of a hand drill for mounting a hand drill on said load transfer member for movement along the member during a drilling operation such that the free end of the load transfer member may be placed against a side of the workpiece to be drilled during a drilling operation to transfer torque through the load transfer member and laterally into the workpiece thereby diverting torque from the user's body while securing the hand drill relative to the workpiece without positively attaching the load transfer member to the workpiece, said means including a yoke adapted to be releasably fixed to said body between said handle and said chuck, a holder, an arm slidably received on said holder, one of said arm and holder being fixed to said yoke and projecting laterally from said body, the other of said holder and arm having fixed thereto a mounting means slidably receiving the load transfer member to mount the drill body for movement along the load transfer member, said holder and arm being slidable relative to each other to position the load transfer member at a selected distance from the body, and wherein there is further included means for releasably fixing the arm and holder relative to each other in any one of a number of selected positions, and means for releasably retaining said mounting means on said load transfer member while permitting slidable movement of said arm and holder together with said drill body along said load transfer means.

Dependencies are inferred from the claim text.