초록 ▼

A portable concrete finishing system comprising a backpack-borne, pivoting engine that powers a selected tool. A rigid frame supporting a four cycle motor is connected to the tool by a flexible power shaft. A removable vibration absorption system isolates the user from stress. A pair of integral, di

A portable concrete finishing system comprising a backpack-borne, pivoting engine that powers a selected tool. A rigid frame supporting a four cycle motor is connected to the tool by a flexible power shaft. A removable vibration absorption system isolates the user from stress. A pair of integral, divergent shoulder harnesses protrude from the backpack top and an encircling, semi-elastic waist belt encircles the bottom. An integral belt tensioner permits the user to adjust belt tightness. The dampening system comprises a removable pad that has a pair of slip-on cuffs to captivate the ends of both shoulder harnesses. The frame also mounts a pair of ergonomic controls that may be easily manipulated by the user to control the power unit. A bracket assembly secures the engine to the frame. The assembly comprises a bracket pivotally coupled to a support that is attached directly to the frame. The bracket and support are hinged by a pin. The bracket directly attaches to the engine. The engine pivots in response to tool manipulation. The elongated flex-cable that connects the tool to the four cycle engine includes an internal compensator that accommodates thermal expansion and contraction.

대표청구항 ▼

[ What is claimed is:] [1.] A portable concrete treatment system adapted to be worn and transported by a user around a job site for consolidating plastic concrete, said system comprising:a four cycle internal combustion motor for powering the system;backpack means for transporting said motor, said b

[ What is claimed is:] [1.] A portable concrete treatment system adapted to be worn and transported by a user around a job site for consolidating plastic concrete, said system comprising:a four cycle internal combustion motor for powering the system;backpack means for transporting said motor, said backpack means comprising protruding shoulder harness means for engaging the shoulders of said user;means for mounting said motor to said backpack means, said mounting means comprising:a bracket 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 job site;a 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;compensator means within said connection for accommodating stresses; and,said concrete tool for finishing concrete adapted to be remotely powered by said connection while said user supports said backpack means.