David S Fender

US Patent:

D2913810, Aug 18, 1987

Filed:

Mar 11, 1985

Appl. No.:

6/710396

Inventors:

David A. Fender - Harleysville PA

US Classification:

D 2247

US Patent:

45504458, Nov 5, 1985

Filed:

May 4, 1984

Appl. No.:

6/607265

Inventors:

David A. Fender - Harleysville PA

International Classification:

A42C 504

US Classification:

21816

Abstract:

A hat or cap comprising an adjustable headband, a semi-rigid visor attached to said headband and extending along the front and both sides of the cap, and a canopy attached to the outer edges of said visor. The canopy is made of formed cloth or semi-rigid material so as to maintain its shape and keep a spaced relation between the cap and the head of the wearer. The canopy further contains air vents in the front and rear so as to permit the unrestricted flow of air about the head of the wearer.

US Patent:

42521823, Feb 24, 1981

Filed:

Mar 20, 1979

Appl. No.:

6/022256

Inventors:

David A. Fender - Harleysville PA

Assignee:

Ecolaire Incorporated - Malvern PA

International Classification:

F28F 918
F28F 2108

US Classification:

165 11R

Abstract:

The tube sheet of a heat exchanger supports a plurality of tubes made from a material such as titanium. A shield is provided for the tube sheet and is welded to the tubes. The shield is made from the same material as the tubes and is spaced from the tube sheet to define a fluid chamber containing fluid at a pressure in excess of the pressure of the liquid flowing through the tubes.