Howard L Gutzwiller

US Patent:

42957893, Oct 20, 1981

Filed:

Aug 9, 1979

Appl. No.:

6/065122

Inventors:

Howard L. Gutzwiller - Zelienople PA

Assignee:

Robinson Industries, Inc. - Zelienople PA

International Classification:

F04D 2918
F04D 2932

US Classification:

416213A

Abstract:

The axial flow fan includes a hub, an annular rim, at least one structural disc welded to and extending between the hub and the rim and a plurality of blades extending outward from the rim. The improvement comprises at least one nonstructural cover plate which is welded to and extends between the hub and the peripheral edge of the rim. Generally there will be a nonstructural cover plate at each end of the hub and rim with the cover plates being of thinner cross section than the structural disc. The cover plates are normally welded along the terminal edge surfaces of the rim as well as the hub.

US Patent:

42193257, Aug 26, 1980

Filed:

Jul 10, 1978

Appl. No.:

5/922987

Inventors:

Howard L. Gutzwiller - Zelienople PA

Assignee:

Robinson Industries, Inc. - Zelienople PA

International Classification:

F27D 704
F04D 2954

US Classification:

432199

Abstract:

An axial flow, reversible fan for use as a plug unit in a heat treating furnace comprises a shaft, an impeller having opposing faces mounted on an end of the shaft and comprising a tankhead and a plurality of flat blades disposed about and extending radially therefrom, a first set of fixed concavo-convex vanes disposed about and extending radially from the shaft adjacent a face of the impeller, a second set of fixed concavo-convex vanes disposed about and extending radially from the shaft adjacent the opposite face of the impeller, and a driving means for rotating the impeller which is attached to the shaft. The vanes of the first and second sets of vanes each has a cross sectional radius of curvature which varies along the length of the vane such that, for a predetermined impeller diameter and fluid flow rate, a fluid drawn across the first and second set of vanes and into the spinning impeller is deflected by the vanes so that the relative velocity of the fluid to the blade as it enters the impeller is tangent to the blade and as the fluid exits the impeller, the other set of vanes is curved so that the velocity of the fluid exiting the impeller relative to the vane is tangent to the vane and the exiting fluid is deflected so that the helical swirl of the exiting fluid is eliminated.

US Patent:

43186939, Mar 9, 1982

Filed:

Nov 20, 1980

Appl. No.:

6/208590

Inventors:

Howard L. Gutzwiller - Zelienople PA

Assignee:

Robinson Industries, Inc. - Zelienople PA

International Classification:

F27B 516

US Classification:

432201

Abstract:

The axial fluid flow fan comprises a shaft, an impeller mounted on said shaft comprising a tankhead and a plurality of blades, a drive means attached to the shaft for rotating the impeller and a deflector having a bugle bell shape defined by a small diameter, a large diameter and a radius of curvature joining the diameters. The deflector is positioned downstream of the fan and slightly spaced from the impeller to separate the fluid coming off the impeller into at least two annular flow areas. The fan is part of a plug unit for a heat treating furnace in which the deflector is positioned about a frustoconical shaped shield which protects the shaft. The flow area downstream of the impeller is divided into equal areas. An extension plate in the furnace cooperates with the deflector to maintain the split areas of flow.