Device for avoiding secondary impacts resulting from the bounces

Details Device for avoiding secondary impacts resulting from the bounces Device for avoiding secondary impacts resulting from the bounces

1982-05-11

1984-02-28

Kazenske, E. R.

Tool driving or impacting

Impacting devices

Hammer head moves in arcuate path or rotates

72406, B23B 4516

Patent

active

044337361

ABSTRACT:
A device for preventing secondary impacts of a mass against a target member, as used in particular for generating shear waves in the earth, is provided. The mass is secured at the end of a pivotable rigid arm actuated by driving device, and the driving device adapted to block the fall of the rigid arms, comprises a cam co-operating with a pawl when it registers therewith and with a flat part of the cam with the registering conditions occurring only after the first impact of the mass and its bounce against the target member.

REFERENCES:
patent: 673697 (1901-05-01), Breckenridge
patent: 1486869 (1924-03-01), Elias
patent: 2655911 (1953-10-01), Van Russum et al.
patent: 3695724 (1972-10-01), Taylor

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