Gear cutting – milling – or planing – Milling – Cutter spindle or spindle support
Patent
1987-03-09
1988-03-29
Briggs, William R.
Gear cutting, milling, or planing
Milling
Cutter spindle or spindle support
408239A, B23C 526, B23B 3110
Patent
active
047340002
ABSTRACT:
A power operated wrench for acuating the drawbars on machine tools, such as vertical spindle milling machines, which permits the operator to move a single handle, and after release of a safety interlock move a pneumatic wrench into position to engage the drawbar nut and either tighten or loosen the drawbar depending on the direction of motion of the operator handle. The mechanical operation permits the operator to rotate the operator handle in the same direction as would be done if the drawbar was being manually tightened or loosened, in order to tighten or loosen the drawbar under power. The safety interlock prevents movement of the power motor into engagement with the drawbar until the machine has been shut off.
REFERENCES:
patent: 3481248 (1969-12-01), Engstrom
patent: 3680437 (1972-08-01), Cravens, Jr.
patent: 3753383 (1973-08-01), Schmidt
patent: 3797956 (1974-03-01), Bayer et al.
patent: 3823642 (1974-07-01), Jerue
patent: 3898911 (1975-08-01), DeCaussin
patent: 4075927 (1978-02-01), Frazier
patent: 4382730 (1983-05-01), Reinisch
patent: 4411568 (1983-10-01), Rohm
patent: 4511295 (1985-04-01), Razdobreev
patent: 4589808 (1986-05-01), O'Connor
Brochure illustrating "DoALL Power Drawbar" for 200 Series and 2000 CNC Mills (DoALL Industrial Supply).
Brochure illustrating "Metal Machine Automatic Power Drawbar" (U.S. Pat. No. 4,511,291).
Brochure illustrating "Quicktwist Pneumatic Drawbar" (Reinisch Products).
Briggs William R.
Kurt Manufacturing Company, Inc.
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