David F Fijas

7121102, Oct 17, 2006

Jun 29, 2004

10/879224

David F. Fijas - Depew NY, US
Timothy J. Galus - Hamburg NY, US

API Heat Transfer, Inc. - Buffalo NY

F25D 17/06

62 93, 62513

A precooler/chiller/reheater (PCR) system comprising a precooler/reheater counterflow heat exchanger and a chiller counterflow heat exchanger separated by a moisture removal section. Refrigerant is flashed through a perforated distribution manifold along the plates of the chiller. Warm, moist air is precooled in the precooler/reheater heat exchanger. A manifold conveys the precooled air to the chiller heat exchanger. Chilled air exits the chiller at a low point in the system. Moisture condensed in the precooler and chiller drains into a sump that also acts to convey air into the moisture removal section. Water droplets are stripped from the airflow and drain downwards into the sump. The chilled and dried air is conveyed to the second side of the precooler/reheater heat exchanger and passes downward in counterflow to the direction of air entering the system on the first side of the heat exchanger, then exits the system ready for use as reheated, dried air.

20020074114, Jun 20, 2002

Aug 31, 2001

09/945267

David Fijas - Depew NY, US

F28F001/42
F28F019/02
F28F013/18
F28F001/14
F28F001/36

165/184000, 165/133000, 165/179000

A finned heat exchange tube includes a metal cylindrical central tube having an outer surface and a metal fin helically disposed on and in thermally conductive contact with the outer surface of the tube. The cross-section of the fin is trapezoidal in shape, with a longer and a shorter base, the longer base being in contact with the outer surface of the tube. Alternatively, the fin can have a cross-section substantially rectangular in shape, having rounded comers and sides of longer and shorter dimensions perpendicular to one another, a side of the shorter dimension being in contact with the outer surface of the tube. A process for forming a heat exchanger tube comprises helically winding and securing a metal fin on an outer surface of a metal cylindrical central tube. The fin, which is in thermally conductive contact with the central tube, has a cross-section that can be trapezoidal or substantially rectangular in shape.

20080022702, Jan 31, 2008

Aug 9, 2007

11/836468

David Fijas - Depew NY, US
Timothy Galus - Hamburg NY, US

B01D 53/00
F25D 17/06

062093000, 095039000

A system for providing cooled compressed air free of entrained moisture. A housing surrounds a heat exchanger and has an inlet for passage of hot compressed air into an input plenum of the housing and an outlet plenum having an outlet for the cooled and dried compressed air. The bottom of the output plenum extends below the bottom of the heat exchanger to form a trough which collects condensate that collects on the plates of the heat exchanger, flows to the bottom of the heat exchanger, and is pushed by the flow of the compressed air to the output plenum. A shield is placed between the outlet and the heat exchanger to prevent condensate spewed from the plates of the heat exchanger from passing directly across the outlet opening or directly into the outlet opening.

20080257532, Oct 23, 2008

Dec 15, 2005

11/722042

David F. Fijas - Depew NY, US
Timothy J. Galus - Hamburg NY, US

F28B 1/00

165110

A system for providing cooled compressed air free of entrained moisture. A housing surrounds a heat exchanger and has an inlet for passage of hot compressed air into an input plenum of the housing and an outlet plenum having an outlet for the cooled and dried compressed air. The bottom of the output plenum extends below the bottom of the heat exchanger to form a trough which collects condensate that collects on the plates of the heat exchanger, flows to the bottom of the heat exchanger, and is pushed by the flow of the compressed air to the output plenum. A shield is placed between the outlet and the heat exchanger to prevent condensate spewed from the plates of the heat exchanger from passing directly across the outlet opening or directly into the outlet opening.

20100059010, Mar 11, 2010

Mar 13, 2006

11/911247

David F. Fijas - Depew NY, US

F02M 35/10

12318461

A heat insulator for an intake manifold of an air-cooled charge air cooler is a rectangular box placed inside the intake manifold housing. The charge air coming into the intake manifold is passed to the inside of the box by a liner in the housing tube. One side of the box has a plurality of openings with outwardly extending walls for abutting directly with the tubes or plates of the heat exchanger section of the cooler. The box has outwardly extending protrusions for positioning the box inside the intake manifold housing, the protrusions being such that direct heat transfer between the box and the housing is minimal and the heat conduction through the housing wall is sufficient to keep the housing temperature significantly lower than the charge air temperature. The box is not air tight to allow relatively thin material to be used since there is no pressure differential between the outside and the inside of the box.

55070701, Apr 16, 1996

Aug 31, 1994

8/298656

Gerald J. Spyche - West Seneca NY
David A. Fijas - Cheektowaga NY

Enidine, Inc. - Orchard Park NY

E05F 300

16 49

A mechanism for controlling the opening and closing of a closure object, comprising an outer cylinder whose inner chamber, contains hydraulic fluid, a distal end of the outer cylinder being attachable to either a closure object or an object to be closed. A circumferential single groove is located in an inner wall of the outer cylinder and a piston shaft telescopically received within the outer cylinder extends proximally therefrom, being attachable to either a closure object or an object to be closed, and distally into the inner chamber. A piston head is mounted distally on the piston shaft. The piston head contains a bore therethrough, a peripherally located circumferential retaining groove, and an inclined outer surface which increases in cross section in the distal direction. A seal prevents hydraulic fluid from passing around the piston head between the distal chamber and the proximal chamber. A snap ring, partially housed within the single groove, engages the inclined outer surface of the piston head.

58455051, Dec 8, 1998

May 30, 1997

8/866808

Timothy J. Galus - Hamburg NY
David F. Fijas - Depew NY

American Precision Industries Inc. - Buffalo NY

F25D 1706

62 95

A heat exchanger comprising a precooler and reheater core adjacent a chiller core, first heat transfer passages extending through both cores through which incoming air passes in a first direction, second heat transfer passages extending through the chiller core through which coolant passes in heat exchange relationship with incoming air and perpendicular to the first direction, and third heat transfer passages extending through the precooler and reheater core through which cooled air from the chiller core passes in heat exchange relationship with the incoming air and perpendicular to the first direction. A conduit conducts chilled air from the chiller core to the third set of heat transfer passages. Incoming air is chilled in the chiller core and thereafter exchanges heat with the incoming air in the precooler and reheater core to precool the incoming air to form water droplets and to raise the temperature of the chilled air to a usable temperature. The precooled and moist incoming air exchanges heat with coolant in the chiller core such that the air is chilled to a low temperature condensing water vapor therein.

60855290, Jul 11, 2000

May 29, 1998

9/086899

Timothy J. Galus - Hamburg NY
David F. Fijas - Depew NY

American Precision Industries Inc. - Buffalo NY

F25D 1706

62 93

A heat exchanger comprising a precooler and reheater core adjacent a chiller core, first heat transfer passages extending through both cores through which incoming air passes in a first direction, second heat transfer passages extending through the chiller core through which coolant passes in heat exchange relationship with incoming air and perpendicular to the first direction, and third heat transfer passages extending through the precooler and reheater core through which cooled air from the chiller core passes in heat exchange relationship with the incoming air and perpendicular to the first direction. A manifold contiguous with both cores conducts chilled air from the chiller core to the third set of heat transfer passages. Incoming air is chilled in the chiller core and thereafter exchanges heat with the incoming air in the precooler and reheater core to precool the incoming air to form water droplets and to raise the temperature of the chilled air to a usable temperature. The precooled and moist incoming air exchanges heat with coolant in the chiller core such that the air is chilled to a low temperature condensing water vapor therein.