Self-colleting drill
AssigneeDresser Industries, Inc.
InventorsRobert L. Gagliano, Herman G. Feuerstein
Life of this patent
Estimating the term…
Abstract
A self-colleting drill that includes a pair of parallel output shafts arranged to drive a pair of drill bits and means for retaining the work piece against a foot member of the drill so that the holes will be spaced therein in accordance with the spacing between the drill bits or shafts. A plurality of drill guide members having varying hole spacings therein, provide a variety of center distances between the shafts that extend therethrough. A plurality of foot members are also provided that have mating hole spacings to the drill bushings providing for the variable drill bit spacing.
Claims5
An improved self-colleting drill including a hollow body, an air motor journaled in the body, a piston reciprocable in the body, a pair of rotatable drive shafts driven by the air motor, valve means in said body arranged to actuate said motor and piston, a foot member mounted on the body for engaging and holding a work piece, the foot member being operably connected to the piston, and a collet carried by the foot member and actuatable by the piston to hold the work piece against the foot member, said improvement comprising:
- said drive shafts are flexible
- a recess in the exterior of the body adjacent to one end of the drive shafts;
- a guide member located in said recess on the body having a pair of spaced holes extending therethrough generally parallel to the direction of movement of the piston;
- a drill drive bushing rotatable in each said hole, having one end connected to said drive shafts and arranged on the other end to receive a drill bit;
- and,
- releasable means for removably locating said guide member on the body whereby said guide member can be quickly and easily exchanged to provide preselected spacings between said holes.
Dependencies are inferred from the claim text.