Hole saw and drive

Details Hole saw and drive Hole saw and drive

1988-05-02

1992-03-17

Schwartz, Larry I.

Cutting by use of rotating axially moving tool

With product handling or receiving means

Ejector

408209, 408204, 408703, B23B 5104

Patent

active

050963414

ABSTRACT:
A hole saw and drive includes a cup-shaped saw body having a closed end and a plurality of cutting teeth. A left-hand threaded collar is secured to the closed end and defines one or more drive tabs extending into the saw body interior. A left-hand threaded mandrel is received within the threaded collar and includes a pilot drill and intermediate outwardly extending flange. An additional set of one or more drive tabs extend upwardly toward the threaded collar from the flange. The drive tabs cooperate to couple rotational power from the mandrel to the saw body. The left-hand threads on the mandrel and collar cooperate to permit the reverse rotational operation of the mandrel to expel a cutting plug from the saw body interior.

REFERENCES:
patent: 137435 (1878-04-01), Gillespie
patent: 915201 (1909-03-01), Miller et al.
patent: 3647310 (1972-03-01), Morse
patent: 4741651 (1988-05-01), Despres
patent: 5035548 (1991-07-01), Pidgeon

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