Backpack mounted pivoting motor for concrete finishing

A portable, backpack mounted concrete finishing system adapted to be worn and transported by a user about a job site when finishing plastic concrete, said system comprising:

• an internal combustion motor for powering the system:
• a backpack worn by the user to support said motor, said backpack comprising:
• a rigid frame comprising shoulder harness means for substantially supporting the backpack on the user's shoulders;
• belt means attached to said frame for securing the backpack to the user;
• tensioning means for tightening said belt means;
• control means for manipulating said motor, said control means mounted on said frame;
• vibration isolator means for isolating motor vibration from the user;
• dampening means mounted on said shoulder harness means for absorbing vibrations produced by said motor;
• means for pivotally mounting said motor on said backpack, said mounting means comprising:
• a bracket for supporting said motor;
• a support centered upon and attached to said backpack;
• and,
• means for pivotally coupling said bracket to said support, said coupling means establishing a pivot axis substantially parallel with the user and substantially perpendicular to the site;
• a portable tool for finishing concrete adapted to be remotely powered by said motor while said user supports said backpack;
• flexible connection means for connecting said motor to said tool;
• whereby said means for pivotally mounting said motor to said backpack eliminates the transfer of torsional stain from said flexible connection means to said backpack when said tool is manipulated.

A portable concrete vibrating system adapted to be worn and transported by a user over a construction site for consolidating plastic concrete, said system comprising:

• a backpack worn by a user for supporting and transporting the system;
• a motor for powering the system;
• means for hingedly mounting said motor to said backpack;
• a vibrator powered by said motor, said vibrator comprising an elongated casing and a pendulum shaft rotatably, generally coaxially disposed therewithin for forcibly impacting the casing in response to the movement of said pendulum shaft;
• a flexible connection between said backpack and said vibrator extending between the user and the concrete;
• and, said flexible connection quick connected to and powered by said motor and adapted to be carried by said user about a job site for powering a concrete tool;
• and,
• said concrete tool for finishing concrete adapted to be remotely powered by said motor while said user supports said backpack;
• and,
• said means for hingedly mounting said motor to said backpack comprising:
• a bracket for supporting said motor;
• a support centered upon and attached to said backpack;
• and,
• means for pivotally coupling said bracket to said support, said coupling means establishing a pivot axis substantially parallel with the user and substantially perpendicular to the site;
• compensating means within said flexible connection for accommodating axial stresses caused by said vibrator, wherein said compensating means torsionally couples said flexible connection to said motor, and said compensating means is slidable within said flexible connection in response to heat buildup and axial stresses to prevent over tensioning of said flexible connection;
• and,
• a dampening system comprising an elongated pad selectively secured to said backpack.