Inventor
KETTNER KONRAD K
DE5 patents
Patents
5 patentsUS5567886AOct 22, 1996
Hydraulic impulse screwdriver particularly for tightening screw connections
COOPER IND INC25 citations90
US4822264AApr 18, 1989
Reversible twin-chambered compressed-air motor
COOPER IND INC36 citations90
US5217079AJun 8, 1993
Hydro-impulse screwing device
COOPER IND INC28 citations89
US5439063AAug 8, 1995
Compressed-air screw or bolt tightener, especially an impulse or a torque screw or bolt tightener
COOPER IND INC40 citations86
US5172772ADec 22, 1992
Hydro-impulse screw tool
COOPER IND INC11 citations70