Donald Paul Sharp

US Patent:

45260915, Jul 2, 1985

Filed:

Aug 2, 1984

Appl. No.:

6/637122

Inventors:

Donald W. Sharp - Phoenix AZ

International Classification:

F24F 1302
E04B 718

US Classification:

98 391

Abstract:

The invention comprises an economical, adjustable roof jack for connecting a roof mounted air handler to an air duct therebelow, wherein a single sheet metal pattern comprises a portion of a lower and upper section of duct and wherein the duct sections are connected, each to the other, by means of a sheet metal bend hinge in the single sheet metal pattern thereby allowing adjustment of the angle between the upper and lower duct sections and providing a water and weather tight seal along the hinge line therebetween.

US Patent:

47814012, Nov 1, 1988

Filed:

May 15, 1987

Appl. No.:

7/050082

Inventors:

Donald W. Sharp - Phoenix AZ

International Classification:

F24F 1302

US Classification:

285 44

Abstract:

The invention comprises an economical, adjustable duct section which allows an installer to mount and connect a curved end thereof to an opening in an air duct bend and to adjust the other end to a desired predetermined angle with respect to the horizontal. The invention makes it more feasible to install a second air handler on an outlet duct bend of a first air handler for augmenting an output of the first air handler on the roof of a building or the like. It provides an easily made water and weather tight seal between the assembled units.