Hand held rotary machine tool with vibration insulating means

Details Hand held rotary machine tool with vibration insulating means Hand held rotary machine tool with vibration insulating means

1979-05-15

1981-05-19

Vrablik, John J.

Rotary expansible chamber devices

Miscellaneous

308143, 308145, 308230, 308233, F01C 1302, F01C 2102

Patent

active

042682339

ABSTRACT:
A hand held machine tool intended for grinding and like operations, having an outer housing containing a pneumatic vane motor by which a tool carrying spindle is rotated. At its forward end, the motor is supported in the housing by at least one resilient O-ring for absorbing radial vibrations arising in the spindle during work and a conical thrust ball bearing for transferring axial load to the housing without restraining the radial resiliency provided by the at least one O-ring. At its rear end, the motor is supported in the housing by a substantially non-resilient O-ring, which means that the motor is apt to perform a pendular movement about its rear end when exposed to vibrations from the spindle.

REFERENCES:
patent: 3218028 (1965-11-01), Borden
patent: 4140446 (1979-02-01), Fernstrom et al.
patent: 4177024 (1979-12-01), Lohn

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