Pneumatic hammer

Details Pneumatic hammer Pneumatic hammer

1985-10-10

1987-09-15

Kazenske, E. R.

Tool driving or impacting

Impacting devices

With means to cause or control advance of hammer head

173 13, 173134, 173132, 164229, 91216K, B23B 4516

Patent

active

046933220

ABSTRACT:
Apparatus for pneumatically stamping identifying impressions on a workpiece is provided. The apparatus includes a double-acting air cylinder having a hollow piston rod. An impact piston is provided inside the barrel formed inside the piston rod to, alternatively, seal an aperture in the piston or to travel inside the barrel in order to strike a plunger mounted in a plunger housing slidably supported by the leading end of the piston rod. A stamping head having an anvil adjacent to the stamping characters is provided to be mounted on the end of the plunger housing. In operation, compressed air is injected behind the piston rod thereby extending it toward the workpiece while compressed air is provided ahead of the impact piston to retain it in seated position on an aperture in the piston of the piston rod. When the stamping characters engage the workpiece, further advancement of the piston rod closes the source of compressed air ahead of the impact piston and opens venting apertures.

REFERENCES:
patent: 691442 (1902-01-01), Carroll
patent: 3094186 (1963-07-01), Ballash
patent: 3185223 (1965-05-01), Uhl
patent: 3393755 (1968-07-01), Glaser et al.

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