Hammer having fluid biased work member

Details Hammer having fluid biased work member Hammer having fluid biased work member

1975-04-07

1978-05-16

Purser, Ernest R.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

173132, 173134, 173139, 173 1, E21C 324, E21C 334

Patent

active

040893804

ABSTRACT:
A hammer and more particularly a fluid operable hammer wherein alternating impetus provided by pressurized liquid and gas means actuates a reciprocable hammer piston to generate repetitive impact loads. A work member is provided to receive blows from the hammer and includes an enlarged portion located in a sealed, variable volume cushion chamber. Means are provided to provide fluid above atmospheric pressure in the chamber. The chamber is sealed before hammer operation to provide a variable gas pressure cushioning chamber for the work member.

REFERENCES:
patent: 513941 (1894-01-01), King
patent: 539240 (1895-05-01), Soley
patent: 913928 (1909-03-01), Traylor
patent: 1591930 (1926-07-01), Smith
patent: 2700876 (1955-02-01), Gagnan
patent: 2948122 (1960-08-01), Smith
patent: 3796271 (1974-03-01), Amtsberg

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