Blind hole self-collet countersink

Details Blind hole self-collet countersink Blind hole self-collet countersink

1997-01-23

2000-03-14

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

408 82, 408 93, 408111, 408130, 408702, B23B 4504, B23B 4514, B23B 4722, B23B 5108

Patent

active

060364092

ABSTRACT:
This invention is a portable pneumatic cutter tool for cutting countersinks into a workpiece 17 having pre-drilled holes 15. When pressure is applied, a piston return cylinder 57 and a feed rate cylinder 79 are also pressurized, which sets a body piston 72 and spindle piston 80 reacts against a spindle bar 82 which holds nose 94 in its outer-most limit position. A pistol grip drill 44 drives a geared belt 34 to cut the countersink after actuation by trigger 45. A flare tube shaft 14 expands a multiple finger and pad arrangement of a collet 12 to provide clamp-up on the back side of workpiece 17. Clamp-up on the front side of workpiece 17 is provided by pneumnatic pressure and solid mechanical stops 16. The countersink cutter 18 advances into workpiece 17, reaching its depth, and returns automatically to its start position.

REFERENCES:
patent: 2665597 (1954-01-01), Hill
patent: 2669887 (1954-02-01), Rees
patent: 2706917 (1955-04-01), Hill
patent: 3037401 (1962-06-01), Rees

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