Patent ID: 6065859
Filing Date: 2000-05-23
Classification: B01F,B28B,E04G,F02B

Abstract:
A portable, hand-held concrete vibrating system to be transported by a user over a construction site for consolidating plastic concrete, said system comprising:an elongated frame grasped by said user for supporting and transporting the system;a motor for powering the system, said motor coupled to said frame;a vibrator head powered by said motor adapted to be immersed in plastic concrete, said vibrator head comprising a pivoted weight that is rotatably, generally coaxially disposed within said head for forcibly causing vibrations in response to internal impacts;a flexible drive cable extending coaxially within said frame between said motor and said vibrator head; and,compensating means within said vibrator head for accommodating axial and rotational stresses caused by high speed rotation of said weight, wherein said compensating means torsionally couples the flexible drive cable to said weight, said compensating means comprising a rigid power input end coupled to said drive cable, a rigid power output end coupled to said weight, and a flexible midportion connecting said power input end and said power output end, and,wherein said compensating means power input end and said compensating means power output end are disposed adjacent alignment bearings.