DeWalt Products Co. - Assigned Patents

Manufacturers Index - DeWalt Products Co.

DeWalt Products Co.
Leola, PA; Lancaster, PA; Towson, MD, U.S.A.
Company Website: http://www.dewalt.com/
Manufacturer Class: Wood Working Machinery

Patents

This page contains information on patents issued to this manufacturer.

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Patent Number	Date	Title	Name	City	Description
1,528,536	Mar. 03, 1925	Woodworking machinery	Raymond E. De Walt	Bridgeton, NJ	This is the original patent for the radial arm saw, which the inventor marketed as the "DeWalt Wonder-Worker". Patent 1,528,535 covers the yoke for the radial arm saw.
1,528,535	Mar. 03, 1925	Tool holder	Raymond E. De Walt	Bridgeton, NJ	Yoke for radial arm saw This patent is a companion to patent 1,528,536, which is the main patent for the De Walt radial arm sawâ€”the original radial arm saw.
1,683,763	Sep. 11, 1928	Drill or mortising machine	Raymond E. De Walt	Leola, PA	We have seen one example of this machine, labeled "Built by DeWalt Product Company, Leola, Penna. Lancaster Co. Patents Pending".
1,701,912	Feb. 12, 1929	Woodworking machinery	Raymond E. De Walt	Leola, PA
1,738,763	Dec. 10, 1929	Woodworking machine	Raymond E. De Walt	Leola, PA	This patent is an improvement on patent 1,528,536: "The object of the present invention is to provide a more efficient angular adjustment in which the parts are held in place by a cam locking bolt." The assignee later changed the spelling from "De Walt" to "DeWalt". The assignee is described as, "a copartnership consisting of Isaac Lichty Rutt and Clarence Paul Gardner."
1,738,873	Dec. 10, 1929	Floor-sanding machine	Raymond E. De Walt	Leola, PA
1,738,791	Dec. 10, 1929	Level	Gale R. Ober	Chagrin Falls, OH
1,794,836	Mar. 03, 1931	Woodworking machine	Raymond Elmer De Walt	Leola, PA
1,813,568	Jul. 07, 1931	Adjustable machine head	Raymond E. De Walt	Leola, PA
1,815,037	Jul. 21, 1931	Sawing machine	Raymond E. De Walt	Leola, PA
1,854,510	Apr. 19, 1932	Portable power driven saw	Joseph F. Haas	Forest Park, IL
1,888,679	Nov. 22, 1932	Safety device for cutting machines	Walter Knapp	Lancaster, PA
2,022,288	Nov. 26, 1935	Tool holder	Walter Knapp	Lancaster, PA	Other designs from this inventor were assigned to DeWalt Products Corp., but not this one. Nonetheless, this patent number has been seen on a DeWalt Model FB radial arm saw.
2,022,289	Nov. 26, 1935	Tool holder	Walter Knapp	Lancaster, PA	Other designs from this inventor were assigned to DeWalt Products Corp., but not this one. Nonetheless, this patent number has been seen on a DeWalt Model FB radial arm saw.
2,185,304	Jan. 02, 1940	Reciprocatory carriage structure	Walter Knapp	Manheim Township, PA	A 1943 DeWalt Model GP has a plate saying, "Anti-Friction Carriage Mounting / U.S. Pat. No. 2,185,304".
2,257,459	Sep. 30, 1941	Attachment for power saws	Wallace W. Gardner	Lancaster, PA
2,289,259	Jul. 07, 1942	Carriage for cutting or sawing machines	Ewald Schutz	Lancaster, PA	This patent number has been seen on DeWalt's MM B18 8-inch radial arm saw, and on the heavier-duty Model GE.
		Carriage for cutting or sawing machines	Wallace W. Gardner	Lancaster, PA
2,297,882	Oct. 06, 1942	Carriage for cutting or sawing machines	Ewald Schutz	Lancaster, PA
		Carriage for cutting or sawing machines	Wallace W. Gardner	Lancaster, PA
2,329,345	Sep. 14, 1943	Saw table	Wallace W. Gardner	Lancaster, PA	This patent number has been seen on DeWalt's MM B18 8-inch radial arm saw, and on the heavier-duty Model GE.
2,329,357	Sep. 14, 1943	Cutting machine	Jesse R. Mowery Jr.	Lancaster, PA	This patent number has been seen on DeWalt's MM B18 8-inch radial arm saw, and on the heavier-duty Model GE.
		Cutting machine	Wallace W. Gardner	Lancaster, PA
2,340,953	Feb. 08, 1944	Cutting or sawing machine	Wallace W. Gardner	Lancaster, PA
2,353,088	Jul. 04, 1944	Cutting machine	Ewald Schutz	Lancaster, PA	This patent is interesting because it is for a moving-arm radial arm saw. DeWalt originated the design where the motor is attached to a moving carriage that travels on a fixed arm. Others, presumably to evade Ray De Walt's patents, created a different design, where the motor is affixed to the end of the arm, and that entire assembly reciprocates. The latter design has the advantage that the arm moves out of the way when the saw is pushed back, but it has two disadvantages: it is more difficult to make the saw move easily yet precisely, and the arm projects quite a distance from the rear of the table. This last disadvantage is nearly fatal, and makes these saws very difficult to accommodate. They cannot go against a wall unless a hole is cut for the arm, and if they are placed away from the wall where people can walk behind the saw, then the moving arm is a safety hazard. DeWalt did produce this saw, but it was not very successful. Besides several DeWalt-badged examples of this design, we have also seen one labeled, "Victory Motors, Incorporated". Inventor Ewald Schutz had worked for DeWalt since at least 1939 so it seems very unlikely that Victory Motors was a firm acquired by DeWalt. Our best guess is that Victory Motors was a small and short-lived company that produced this saw as part of the war effort, probably for military use.
2,353,590	Jul. 11, 1944	Cutting machine	Ewald Schutz	Lancaster, PA	"This invention relates to cutting machines, and it is particularly applicable to machines for cutting pieces from stock that is in the form of rods, tubes, etc."
2,366,512	Jan. 02, 1945	Protractor means for cutting or sawing machines	Wallace W. Gardner	Lancaster, PA
2,562,396	Jul. 31, 1951	Safety device for saws	Ewald Schutz	Lancaster, PA
2,611,398	Sep. 23, 1952	Wood sawing and cutting machine	Ewald Schutz	Lancaster, PA	This is a reciprocating-arm radial arm saw, and is an improvement on patent 2,353,088.
2,623,554	Dec. 30, 1952	Cutter guard for woodworking machines	Ewald Schutz	Lancaster, PA
2,700,115	Jan. 18, 1955	Air-cooled electric motor	Jesse R. Mowery Jr.	Lancaster, PA
2,722,952	Nov. 08, 1955	Jointed radial arm mounting for cutting tool	Charles W. Snyder	Lancaster, PA	This is a turret-arm radial arm saw, a type of design that was patented in 1944 by Red Star Products, Inc. (see patent 2,343,575.)
2,759,502	Aug. 21, 1956	Carriage lock for cutting or sawing machines	Samuel S. Auchincloss	Marietta, PA
2,781,067	Feb. 12, 1957	Safety device for rotary cutters	Robert C. Kaley	Landisville, PA
2,785,710	Mar. 19, 1957	Automatic brake for power tools	Jesse R. Mowery Jr.	Lancaster, PA
2,785,716	Mar. 19, 1957	Safety guard for rotary power tool	Joseph B. Lutton	Lancaster, PA
2,806,491	Sep. 17, 1957	Combination adjustment and locking device for a jointed supporting arm for a power tool	Robert C. Kaley	Landisville, PA	This invention gives improvements to patent 2,722,952, and is for a mechanism to lock the arm angle adjustments.
2,823,711	Feb. 18, 1958	Adjustable splitter blade assembly for saws	Robert C. Kaley	Landisville, PA	This invention gives improvements to patent 1,888,679.
2,833,320	May. 06, 1958	Wide board saw apparatus	Richard C. Bennett	Laceyville, PA	This just might be the first vertical panel saw; such a machine became necessary once plywood and other sheet material became commonplace. (See, however, patent 2,347,359, which was intended for making panels out of hardwood strips but which contains the idea of a vertical panel saw.) Bennett's design was manufactured by the inventor's own company, then by DeWalt, which had just been purchased by Black & Decker. Before the sale to DeWalt, Bennett made some improvements to this invention; see patent 2,973,020.
2,854,613	Sep. 30, 1958	Motor control system	Jesse R. Mowery	Lancaster, PA	"This invention relates to motor control systems, and more particularly to improvements in systems in which an alternating current motor is dynamically braked by the application of D. C. to its windings."
D186,423	Oct. 20, 1959	Radial arm tool for sawing, planing or the like	Roger Protas	Pittsburgh, PA
		Radial arm tool for sawing, planing or the like	Anton Parisson	Brentwood, PA
2,926,709	Mar. 01, 1960	Guard for rotary power cutter	Robert C. Kaley	Landisville, PA	This patent number has been seen on both AMF and DeWalt radial arm saws.
2,942,632	Jun. 28, 1960	Locking structure for power tool setting	Harold C. Cassey	Landisville, PA
606,864	Oct. 18, 1960	Wide board saw apparatus	Richard C. Bennett	Laceyville, PA	See US patent 2,833,320.
2,959,200	Nov. 08, 1960	Tool elevating device	Harold C. Cassey	Landisville, PA
2,973,020	Feb. 28, 1961	Apparatus for sawing wide boards	Richard C. Bennett	Laceyville, PA	Improvements to the inventor's patent 2,833,320.
2,989,094	Jun. 20, 1961	Adjustable stops and guide bar for power tool	Joseph Panavas	Detroit, MI
2,989,675	Jun. 20, 1961	Safety brake for power tool	George Lowe	Lancaster, PA
623,872	Jul. 18, 1961	Apparatus for sawing wide boards	Richard C. Bennett	Laceyville, PA	See US patent 2,973,020.
3,011,112	Nov. 28, 1961	Electric motor braking system	Jesse R. Mowery	Lancaster, PA	"This invention relates to safety devices for wood and metal working equipment. Particularly, it relates to braking an electric motor."
3,022,694	Feb. 27, 1962	Cycled jet cooling mechanism	Oscar H. Nuss	Lancaster, PA	This cooling system was for metal-cutting radial arm saws.
3,038,109	Jun. 05, 1962	Braking systems for electrical motors	Christian B. Zimmerman	Lancaster, PA
		Braking systems for electrical motors	Jesse R. Mowery Jr.	Lancaster, PA
3,068,919	Dec. 18, 1962	Shaper guard for radial saw machine	Robert C. Kaley	Landisville, PA
3,080,897	Mar. 12, 1963	Saber saw attachment for radial saw machine	Donovan L. Winter	Lancaster, PA
3,213,908	Oct. 26, 1965	Work hold-down for power-operated panel saw	Harold C. Cassey	Landisville, PA	Invention is a "resiliently-mounted work hold-down device which steadies the panel and prevents it from vibrating during the cutting operation."
		Work hold-down for power-operated panel saw	Ewald Schutz	Lancaster, PA
3,294,129	Dec. 27, 1966	Radial arm saw machine	Ewald Schutz	Lancaster, PA	"The present invention relates to a radial arm saw machine, and more particularly, to a compact low-cost radial arm saw machine, one which may be manufactured easily and economically..."
		Radial arm saw machine	Samuel H. Kohler	Lancaster, PA
3,295,568	Jan. 03, 1967	Uni-directional indexing means for power-operated machine	Harold C. Cassey	Manheim, PA