Ram head for self-driven pneumatic ram drills

Details Ram head for self-driven pneumatic ram drills Ram head for self-driven pneumatic ram drills

1982-06-16

1984-07-31

Yost, Frank T.

Tool driving or impacting

Impacting devices

Hammer head driven by spring

173126, 173129, 173131, B25D 904

Patent

active

044624689

ABSTRACT:
A ram head for self-driven pneumatic ram drills for producing boreholes in the earth, having a generally tubular housing within which there is movable axially back and forth an impact piston whose impact energy can be transmitted to the ram head arranged at the front end of the housing. In order on the one hand, to crush obstacles by high energy and, on the other hand, to avoid too strong a compacting of small particles of earth in front of the apparatus and in addition make it possible to drive pipes, the generally conical ram head is provided with a central axial bore within which an impact bolt is mounted for longitudinal displacement between two end positions which are limited by stops, at the front end position of which supported by a spring the impingement surface of the impact bolt for the impact piston lies within the anvil surface of the ram head and at the rear end position of which the impingement surface projects from the anvil surface in the direction towards the impact piston.

REFERENCES:
patent: 1372257 (1921-03-01), Swisher
patent: 3765493 (1973-10-01), Rosar et al.
patent: 3865200 (1975-02-01), Schmidt
patent: 4036310 (1977-07-01), Schnell
patent: 4193461 (1980-03-01), Lamberton et al.
German Newspaper "Baupraxis", vol. 11, 1978, (Willispecht-Ziegenaue Erdbohrungen), pp. 16-17.

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