Screw having a V-shaped groove profile for cooperating with a pi

Details Screw having a V-shaped groove profile for cooperating with a pi Screw having a V-shaped groove profile for cooperating with a pi

1979-12-05

1982-08-03

Vrablik, John J.

Rotary expansible chamber devices

Interengaging rotating members

Non-parallel axis

74425, 74458, F01C 112, F01C 2108, F04C 1812

Patent

active

043425488

ABSTRACT:
A tool having only an end cutting-edge carries out a first movement of penetration into a screw blank so as to produce a groove having flanks substantially parallel to the pinion axis. The tool-holder is angularly displaced with respect to the spindle which carries the screw blank. A second movement of tool penetration takes place while the relative displacement is progressively reduced in order to obtain an inclined flank which produces a V-shaped profile. The screw is intended to form part of a compression and expansion machine and to cooperate with at least one pinion having V-form teeth.

REFERENCES:
patent: 1437009 (1922-11-01), Perkins et al.
patent: 1683163 (1928-09-01), Cone
patent: 3551082 (1970-12-01), Zimmern

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