Air hammer with blow-out air system

Details Air hammer with blow-out air system Air hammer with blow-out air system

1976-11-29

1978-08-08

Staab, Lawrence J.

Tool driving or impacting

Work cleansing

By motive fluid for drive motor or advance causing or...

173 69, B25D 1714

Patent

active

041050800

ABSTRACT:
The air hammer is adapted to be connected to a source of pressurized air and has an exhaust passage means controlled by a settable exhaust valve. Reciprocation of the hammer is controlled by an automatic valve when the hammer is active. The exhaust passage means and exhaust valve are arranged so that in a first set position of the exhaust valve, it renders the hammer operative by the pressurized live air under the control of the automatic valve, and in a second set position of the exhaust valve, it renders the hammer inoperative by the pressurized live air. Further, in said second position of the exhaust valve, it admits live air from said source to the tool continuously in sufficient volume to blow out of a hole, in which the tool is operating, particulate matter theretofore produced in the hole by the tool. In the first position, the exhaust valve stops the flow of live blow-out air to the tool. A smaller volume of live blow air, sufficient only to agitate the particulate matter in the hole, but not to blow it out of the hole, may be provided continuously to the tool. The exhaust valve has a handle arranged so that when the handle extends transversely of the hammer axis, the exhaust valve is in said first position, wherefore the hammer is active and the blow-out air is cut off, and when the handle is parallel to the hammer axis, the exhaust valve is in said second position, wherefore the hammer is inactive and the blow-out air is admitted to the tool.

REFERENCES:
patent: 1605714 (1926-11-01), Gilman
patent: 1637203 (1927-07-01), Slater
patent: 1826095 (1931-10-01), Sheets et al.
patent: 2034699 (1936-03-01), Hulshizer
patent: 2177391 (1939-10-01), Lear
patent: 2251224 (1941-07-01), Curtis
patent: 2643640 (1953-06-01), Lear

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