Portable power tool

Details Portable power tool Portable power tool

1997-05-01

1999-10-19

Young, Lee

Tool driving or impacting

Means to drive tool about an axis

Gear drive

173217, 74573R, E21B 300

Patent

active

059672439

ABSTRACT:
A portable power tool for operating a wheel type working element comprises an output spindle (12) which is drivingly connected to a rotation motor (11) and which is provided with an automatic ball type balancing device (21) and a working implement mounting device (22), wherein the balancing device (21) comprises a peripheral wall (38) provided with a ball race (43), a transverse end wall (39) and a number of balls (41) freely movable along the ball race (43), and the peripheral wall (38) and the end wall (39) are formed in one piece with each other as well as with the output spindle (12).

REFERENCES:
patent: 1314005 (1919-08-01), Louden
patent: 3731556 (1973-05-01), Decker
patent: 3799619 (1974-03-01), LaBarber
patent: 4006785 (1977-02-01), Roll et al.
patent: 4060009 (1977-11-01), Wyman
patent: 4653338 (1987-03-01), Yeomans
patent: 5060771 (1991-10-01), Robinson
patent: 5111713 (1992-05-01), Cameron et al.
patent: 5299392 (1994-04-01), Jacobsson et al.
"Varfor inte balansera automatiskt!", Tekniska Massan hosten-95; B24 B:23/00 (two pages).

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