Tool driving or impacting – Impacting devices – Hammer head comprises plural parts or diverse materials
Patent
1976-01-09
1977-11-01
Purser, Ernest R.
Tool driving or impacting
Impacting devices
Hammer head comprises plural parts or diverse materials
91276, 173137, 173138, E02D 708, E02D 710
Patent
active
040561500
ABSTRACT:
A ram device has a drop hammer connected to the piston of a lifting cylinder which is connected by means of short and wide ducts to a control apparatus for admitting compressed air into the cylinder and for discharging the air from the cylinder beneath the piston, control apparatus directly communicating with the ambient air so as to allow a rapid escape of the air through large air vent ports from beneath the piston. In particular this control apparatus is directly mounted on the cylinder, or is included in an extension of this cylinder.
REFERENCES:
patent: 632262 (1899-09-01), Gunnell
patent: 2259379 (1941-10-01), Herzbruch
N.V. Appingedammer Bronsmotorenfabriek
Pate III William F.
Purser Ernest R.
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