Aurand Manufacturing & Equipment Co. - Assigned Patents

Manufacturers Index - Aurand Manufacturing & Equipment Co.

Aurand Manufacturing & Equipment Co.
Cincinnati, OH, U.S.A.
Company Website: https://www.aurand.net/
Manufacturer Class: Metal Working Machinery

Patents

This page contains information on patents issued to this manufacturer.

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Patent Number	Date	Title	Name	City	Description
482,422	Mar. 20, 1917	Outils pour le dressage des pierres, agglomÃ©rÃ©s et autres matÃ©riaux	John O. Berg	New York, NY	This is the French equivalent of US patent 1,223,359. The French patent does not mention inventor John Berg, just the assignee, the Rotary Power-Tool Company, Incorporated, of New York.
1,223,359	Apr. 24, 1917	Tool for treating stone, concrete and other materials	John O. Berg	New York, NY	The Proceedings of the Annual Meeting of the American Warehouseman's Association, in a "Report of the committee on warehouse construction and labor saving devices": "An electric motor driven tool for finishing concrete surfaces is a recent invention. As described by the makers, The Rotary Power Tool Co., New York City, the tool is carried by a strap over a man's shoulder, the power is transmitted from the motor by a flexible shaft to a disc which carries 24 small cutter wheels at a speed of 2,000 R.P.M. The entire outfit weighs 20 lbs. and particular attention has been paid to the protection afforded the operator from injury. The average amount of work done by a single machine is claimed to be 100 sq. ft. per hr. where surface to be removed is that ordinarily found on concrete work and does not exceed 1/8-inch, at a current (i.e., electricity) cost of about 14 cents per day at New York City rates. The machine is arranged to do circular columns, curved corners and will surface within 3/8 of an inch of an inside corner." The November 1914 issue of Concrete-Cement Age, page 225, has an illustrated article on what is presumably an earlier version of this invention, "being manufactured by the Rotary Power-Tool Co., 122 Warren St., N. Y. C."
106,701	Jun. 07, 1917	Tool for treating stone, concrete and other materials	John O. Berg	New York, NY	This is the British equivalent of US patent 1,223,359. The British patent does not mention inventor John Berg; Henry Fairbrother, Chartered Patent Agent, declared the invention on behalf of The Rotary Power-Tool Company, Incorporated, of New York.
1,230,842	Jun. 26, 1917	Tool for treating stone, concrete and other materials	John O. Berg	New York, NY
RE14,392	Nov. 13, 1917	Tool for treating stone, concrete and other material	John O. Berg	New York, NY
1,648,888	Nov. 15, 1927	Portable surface-cleaning tool	Frank E. Aurand	Oak Park, IL
1,874,220	Aug. 30, 1932	Portable surface cleaning tool	Frank E. Aurand	Chicago, IL	Improvements to patent 1,648,888. In the original design, the steel of the cutter elements was found to crystallize due to the repeated impact loads. This improved design introduces a yielding wire mounting which absorbs some of the shock impacts.
1,955,165	Apr. 17, 1934	Bushing	Frank E. Aurand	Oak Park, IL	This bushing provides a water-tight seal for electrical connections.
343,283	Jul. 24, 1934	Surface cleaning tool	Frank E. Aurand	Chicago, IL	This is the Canadian equivalent of US patent 1,874,220.
2,199,383	May. 07, 1940	Cutting tool	Frank E. Aurand	Oak Park, IL	Improvements to patent 1,874,220, aimed at further cushioning the movements of the cutter discs to prevent work hardening and other damage.