Valveless pneumatic hammer

Details Valveless pneumatic hammer Valveless pneumatic hammer

1981-05-15

1983-09-06

Smith, James G.

Tool driving or impacting

Work cleansing

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

173135, 91234, B25D 916

Patent

active

044023707

ABSTRACT:
A valveless pneumatic hammer comprises a hollow casing having a backhead assembly at one end and a bit assembly at the other, and a piston reciprocable in the casing. There is a chamber divider at the backhead end of the casing which co-operates with the piston for conducting fluid under pressure into alternate chambers, one at each piston end, for reciprocation of the piston. A chamber divider is located within the casing by a locating split ring which holds the chamber divider axially against the backhead assembly. The chamber divider also has a recess in the end thereof nearest the piston which together with a bore in this piston end, comprises the fluid chamber at this end of the casing.

REFERENCES:
patent: 914602 (1909-03-01), Polzer
patent: 1518124 (1924-12-01), Mercer
patent: 1927499 (1933-09-01), Nell et al.
patent: 2947519 (1960-08-01), Feucht
patent: 2951467 (1960-09-01), Morrison
patent: 3198264 (1965-08-01), Oelke et al.
patent: 3225841 (1965-12-01), Thompson
patent: 3803983 (1974-04-01), Amtsberg

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