Percussion drill machine

Details Percussion drill machine Percussion drill machine

1981-11-09

1984-07-31

Yost, Frank T.

Tool driving or impacting

Impacting devices

With means for rotating tool

173117, 310 50, B23B 4516, B25D 1600

Patent

active

044624670

ABSTRACT:
A percussion drill machine includes a drill shaft with a chuck for a drilling tool and a percussion device for imparting percussive force to the drilling tool held in the chuck. Each of the driving shaft and the percussive device has a separate electrical motor. The electrical motors can have a common stator or each motor may have its own stator. Each electrical motor has its own rotor and shaft. The shafts can be arranged coaxially with one being a hollow shaft laterally encircling the other. In another arrangement the shafts can be disposed in laterally spaced parallel relation.

REFERENCES:
patent: 2536971 (1951-01-01), Weyandt et al.
patent: 3368634 (1968-02-01), Lear
patent: 3858666 (1975-01-01), Bailey et al.
patent: 3874460 (1975-04-01), Schmid et al.
patent: 3921729 (1975-11-01), Schmuck
patent: 4113035 (1978-09-01), Stiltz et al.
patent: 4206820 (1980-06-01), Bailey et al.
patent: 4276941 (1981-07-01), Wanner et al.

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