Document Type and Number:
Japanese Patent JPH0513509
Kind Code:
Y2
Abstract:
An impact device that consists of a housing having a bore, a piston, and a change-over valve for control of the reciprocal movement of the piston is presented in the present invention. In the present invention, it is not necessary to employ a long-size piston and a high piston speed is obtained and, further, a compact device in which the fluctruation of the pressure in the low pressure path is small can be obtained.
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Application Number:
JP13847086U
Publication Date:
April 09, 1993
Filing Date:
September 09, 1986
Export Citation:
International Classes:
B25D9/12; B25D9/14; B25D9/18; B25D9/20; E21B1/26; (IPC1-7): B25D9/12
Next Patent: JPH0513510