Multi-functional drill and lock assembly

Details Multi-functional drill and lock assembly Multi-functional drill and lock assembly

1992-03-03

1993-06-29

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool-support

With tool-retaining means

7158, 7165, 279905, 408226, B25F 300

Patent

active

052228487

ABSTRACT:
The present invention relates to a multi-functional drill and lock assembly comprising a drill cylinder, a drill pillar and a drill head. A convex tenon at the front end of the drill pillar is adapted to pierce through and sleeve with a guiding groove formed in the lock cylinder. By adjusting the position of the tenon within the guiding groove, a drill head secured to the front end of the drill pillar can be shifted so as to extend beyond or retract within the lock cylinder. The front end of the drill cylinder is formed with a screw locking hole to enable the tool to perform a dual-function. The drill head is removably secured to the drill pillar by a steel shot extending from the lock cylinder, through the drill pillar and into a shot groove formed as part of the drill head.

REFERENCES:
patent: 2854238 (1958-09-01), Kennell
patent: 3965510 (1976-06-01), Ernst
patent: 4209182 (1980-06-01), Sheldon
patent: 4551875 (1985-11-01), Getz et al.
patent: 4791690 (1988-12-01), Kuang-Wu
patent: 4900202 (1990-02-01), Wienhold
patent: 4954025 (1990-09-01), Crawford
patent: 5038435 (1991-08-01), Crawford et al.

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