Donald K. Hagar

Person

Emmans, PA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for delivery of particulate fuel and transport...
- Patent number 5,427,314
- Issue date Jun 27, 1995
- Damper Design, Inc.
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Perimeter seal for air heater
- Patent number 5,363,903
- Issue date Nov 15, 1994
- Damper Design, Inc.
- Donald K. Hagar
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Burner register assembly
- Patent number 5,302,115
- Issue date Apr 12, 1994
- Damper Design, Inc.
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Apparatus and method for delivery of combustion air in multiple zones
- Patent number 5,211,705
- Issue date May 18, 1993
- Damper Design, Inc.
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Sealing of air heaters by deforming sector plates
- Patent number 5,038,849
- Issue date Aug 13, 1991
- Damper Design, Inc.
- Donald K. Hagar
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Method and system for controlling the supply of fuel and air to a f...
- Patent number 4,927,351
- Issue date May 22, 1990
- Eagleair, Inc.
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Method and system for controlling the supply of fuel and air to a f...
- Patent number 4,887,958
- Issue date Dec 19, 1989
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Apparatus and method for delivery of combustion air in multiple zones
- Patent number 4,801,261
- Issue date Jan 31, 1989
- Eagleair, Inc.
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Sealing arrangement for air preheater
- Patent number 4,791,980
- Issue date Dec 20, 1988
- Eagleair, Inc.
- Donald K. Hagar
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Sealing arrangement for air preheater
- Patent number 4,673,026
- Issue date Jun 16, 1987
- Eagleair, Inc.
- Donald K. Hagar
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Burner register assembly
- Patent number 4,504,216
- Issue date Mar 12, 1985
- Eagleair, Inc.
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Multiple blade damper assembly
- Patent number RE31471
- Issue date Dec 27, 1983
- Damper Design, Inc.
- Donald K. Hagar
- 137 - Fluid handling
Information Patent Grant
Sealing means for sliding gate valve
- Patent number 4,334,550
- Issue date Jun 15, 1982
- Mosser Industries, Inc.
- Peter J. Connor
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Expansion joint and fabric therefor
- Patent number 4,273,365
- Issue date Jun 16, 1981
- Donald K. Hagar
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Expansion joint
- Patent number 4,235,460
- Issue date Nov 25, 1980
- Donald K. Hagar
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Multiple blade damper assembly
- Patent number 4,191,212
- Issue date Mar 4, 1980
- Damper Design, Inc.
- Donald K. Hagar
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Apparatus and method for sealing dampers
- Patent number 4,088,146
- Issue date May 9, 1978
- Donald K. Hagar
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Temperature compensating valve assembly
- Patent number 3,972,348
- Issue date Aug 3, 1976
- Mosser Industries, Inc.
- Donald K. Hagar
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES

Patents Applicationslast 30 patents

Information Patent Application
Flow diverter arrangement
- Publication number 20050022887
- Publication date Feb 3, 2005
- Damper Design, Inc.
- Donald K. Hagar
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Donald K. Hagar

Person

Patents Grantslast 30 patents

Apparatus and method for delivery of particulate fuel and transport...

Perimeter seal for air heater

Burner register assembly

Apparatus and method for delivery of combustion air in multiple zones

Sealing of air heaters by deforming sector plates

Method and system for controlling the supply of fuel and air to a f...

Method and system for controlling the supply of fuel and air to a f...

Apparatus and method for delivery of combustion air in multiple zones

Sealing arrangement for air preheater

Sealing arrangement for air preheater

Burner register assembly

Multiple blade damper assembly

Sealing means for sliding gate valve

Expansion joint and fabric therefor

Expansion joint

Multiple blade damper assembly

Apparatus and method for sealing dampers

Temperature compensating valve assembly

Patents Applicationslast 30 patents

Flow diverter arrangement