Edward W Harding

US Patent:

43678807, Jan 11, 1983

Filed:

May 5, 1980

Appl. No.:

6/146246

Inventors:

Edward M. Harding - Middletown MD

Assignee:

Equipment Development Company, Inc. - Frederick MD

International Classification:

B62B 112

US Classification:

280 4713R

Abstract:

A detachable wheeled dolly device for separable connection to the base portion and the handle of relatively larger and heavy wheelless power driven handle manipulated machines, whereby a downward push on the handle tilts such machines from out of surface contact and facilitates transport of such machines from one location to another as required.

US Patent:

51471469, Sep 15, 1992

Filed:

Mar 22, 1991

Appl. No.:

7/673720

Inventors:

Edward M. Harding - Middletown MD

Assignee:

Equipment Development Company, Inc. - Frederick MD

International Classification:

E01C 1922

US Classification:

404 97

Abstract:

A power trowel surface finishing machine comprising a rotatable trowel blade assembly having a plurality of trowel blades disposed on a circumferentially-spaced arrangement, each of the trowel blades being mounted for rotation on radial axes substantially parallel to the surface to be finished, said trowel blades being adapted to rest on the surface to be finished and rotate across the surface; a first adjustment mechanism including a rotary knob for selectively pivoting the trowel blades about the respective radial axes thereof to selectively adjust the pitch of the blades in controlled increments throughout an adjustment range with respect to the surface and maintain the pitch so selected within the adjustment range; and a second adjustment mechanism including a pivotable lever coupled to said first adjustment mechanism for overriding said first adjustment mechanism and rapidly pivoting the trowel blades about the respective radial axes to position the trowel blades from the selected pitch to another selected pitch within the adjustment range in response to manual movement of the second adjustment mechanism by an operator from a rest position, and for rapidly returning the blades to the selected pitch set by the first adjustment mechanism when returned by the operator to the rest position; whereby high or low spots of the surface to be finished can be rapidly removed or filled, respectively, by movement of the second adjustment mechanism.

US Patent:

44468458, May 8, 1984

Filed:

Aug 25, 1981

Appl. No.:

6/296126

Inventors:

Edward M. Harding - Middletown MD

Assignee:

Equipment Development Co. - Frederick MD

International Classification:

B28D 104

US Classification:

125 13SS

Abstract:

The present invention is directed to a portable, table-type masonry saw for cutting concrete blocks, bricks, marble, tile, stone and other objects. The masonry saw includes a gasoline engine for driving a saw blade through a belt drive arrangement coupled to an arbor shaft on which the blade rotates. The gasoline engine is mounted on a stationary support while the saw blade is pivotally mounted by means of a live pivot shaft for engagement and disengagement with the workpiece. A water trough and pump are provided for wet-cutting. The water pump is connected to an output shaft of the gasoline engine through a belt drive which may be removed to permit dry-cutting of an object.

US Patent:

51672154, Dec 1, 1992

Filed:

Oct 11, 1991

Appl. No.:

7/774808

Inventors:

Edward M. Harding - Middletown MD

Assignee:

Equipment Development Co., Inc. - Frederick MD

International Classification:

B28D 702
B28D 104

US Classification:

125 1301

Abstract:

A concrete saw mounted on a wheeled housing for making a substantially linear cut in the surface of a masonry slab is provided with a dust removal apparatus. The dust removal apparatus includes a blade guard partially surrounding the circular blade mounted for rotation on the side of the wheeled housing and a pivotally mounted funnel mounted on the blade guard. The funnel is telescopically mounted on a portion of the blade guard and extends between the blade guard and the slab being cut. A bottom edge of the funnel is provided with a rounded bearing surface so that it rides on the surface of the slab. A vacuum machine is connected to an exhaust duct of the funnel so that concrete dust generated during the making of a cut is continuously exhausted through the funnel and a flexible hose to the vacuum machine as a cut is being made.

US Patent:

43987370, Aug 16, 1983

Filed:

Jan 13, 1981

Appl. No.:

6/224809

Inventors:

Edward M. Harding - Middletown MD

Assignee:

Equipment Development Company - Frederick MD

International Classification:

B62B 302

US Classification:

280 4713R

Abstract:

A detachable wheeled dolly or hybrid roller skate device for separable connection to the base portion and the handle of relatively large and heavy wheelless power driven handle manipulated machines is disclosed whereby an upward push on lifting the handle tilts the machine from out of surface contact and allows the roller skate device to swing under the machine. A subsequent lowering of the machine allows the roller skate device to support the machine, whereby a downward push on the handle tilts the machine out of surface contact and facilitates transport of the machine from one location to another as required. The centroid or center of mass of the hybrid roller skate device is located so that the roller skate device will swing under the machine to be supported.