Hydraulic hammer assembly

Details Hydraulic hammer assembly Hydraulic hammer assembly

1974-11-13

1976-02-24

Purser, Ernest R.

Tool driving or impacting

Impacting devices

Hammer head constitutes or fixed to drive motor cylinder

91216B, 92117A, 173126, E02D 710

Patent

active

039399222

ABSTRACT:
A hydraulic hammer assembly is disclosed which comprises a stationary piston suspended within a tubular frame or casing and a cylinder locked inside a massive ram within the casing. The cylinder forms a differential hydraulic assembly with the piston and moves up and down along the piston. The cylinder is maintained locked to the ram by the pressure of the hydraulic fluid; and the piston, which is formed of two members, is held in assembly by a continuous hydraulic bias with a special hydraulic balancing arrangement which compensates for the pressure switching in the cylinder to which one portion of the piston assembly is exposed.

REFERENCES:
patent: 1077469 (1913-11-01), Goubert
patent: 2068045 (1937-01-01), Wohlmeyer
patent: 3216327 (1965-11-01), Johannsson
patent: 3431986 (1969-03-01), Jansz
patent: 3511130 (1970-05-01), Fishburne

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