Ergonomic concrete hand screed

Details Ergonomic concrete hand screed Ergonomic concrete hand screed

2007-02-27

2008-12-30

Addie, Raymond W (Department: 3671)

Road structure, process, or apparatus

Apparatus

Screed or drag

C404S083000

Reexamination Certificate

active

07470084

ABSTRACT:
An ergonomically-shaped hand screed for levelling and finishing concrete is provided. The screed has a finger relief groove on its rear face and a thumb relief groove on its front face. Both the finger and thumb grooves are positioned nearer the top surface of the screed to form an ergonomically comfortable handgrip. A concrete relief groove is located on the front face near the bottom surface to form a scraper edge. A ridge separates the thumb relief groove and the concrete groove. When the screed is used, the scraper edge and concrete relief groove draw up the concrete overburden from a concrete surface and deflect it away from the operator's hands.

REFERENCES:
patent: 1227308 (1917-05-01), Plank
patent: 4641995 (1987-02-01), Owens
patent: 4702641 (1987-10-01), Naser et al.
patent: 5609437 (1997-03-01), Silva
patent: 6231331 (2001-05-01), Lievers

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