Inventor: David P. Welden

Address: N. Indiana Ave., Iowa Falls, IA 50126
No. of patents: 4
Last patent issue date: 10/24/2000

Number	Title	Issue Date
6135063	Dual regulator direct-fired steam generator A direct-fired steam generator utilizes dual regulators for delivering combustible gas to a burner chamber. A first regulator is a constant pressure gas regulator. A second regulator is a variable pressure gas regulator. The variable pressure gas regulato...	10/24/2000
5775581	Dual heat source heating system A heating system for heating a building with at least a first zone and a second to be heated. The heating system includes a first heating source and a second heating source. The heating system alternates between two modes of operation. In the first mode, ...	07/07/1998
5368474	Direct fired hot water generator with more than one heat exchange zone A burner having a first passageway for delivering a fuel/air mixture into a burner chamber is provided with an igniter spaced from the burner chamber and second and third passageways in fluid communication with the burner chamber and the igniter....	11/29/1994
5305735	Direct fired hot water generator with more than one heat exchange zone A container having a chamber with a cool water inlet disposed at the top thereof in a burner near the bottom thereof. An exhaust for flue gases is disposed at the top of the container. A first heat exchange zone is disposed in the chamber above the burner...	04/26/1994

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