Paul R Swenson

US Patent:

57721130, Jun 30, 1998

Filed:

Sep 20, 1996

Appl. No.:

8/717287

Inventors:

Joseph Gerstmann - Framingham MA
Paul F. Swenson - Cleveland OH

Assignee:

Advanced Mechanical Technology, Inc. - Watertown MA

International Classification:

F24D 300

US Classification:

237 8R

Abstract:

An engine-driven heat pump system is disclosed in which the waste heat from the engine is used to only heat the water contained in a water heater. Space heating may be then provided by circulating the water through an air-handling unit. In order to simplify the operation, the engine's coolant is circulated through a tube surrounding the heater's storage tank. Any risk of contamination to the potable water supply is removed by venting the region surrounding the coolant-to-water heat exchanger. This is achieved by assuring that a surrounding insulation layer does not form a seal over the heat exchanger and by using a non-setting thermally conductive paste between the tube and tank.

US Patent:

45012539, Feb 26, 1985

Filed:

Dec 13, 1982

Appl. No.:

6/449483

Inventors:

Joseph Gerstmann - Framingham MA
William M. Hauck - Glenshaw PA
Robert Raymond - Watertown MA
Paul F. Swenson - Shaker Heights OH

Assignee:

Consolidated Natural Gas Service Company, Inc. - Cleveland OH

International Classification:

F02B 4300

US Classification:

123527

Abstract:

A gaseous fuel system for a vehicle including an on-board compressor for recharging an associated pressure storage tank. The compressor and tank are mounted on the vehicle as a structural unit whereby the tank shields the compressor and high pressure gas flow circuits therebetween and provides a heat exchanger surface for the compressor. A regulator in series with a supply line of low pressure gas prevents gas flow when the compressor does not operate to maintain a vacuum in an intervening dispensing line. An O. sub. 2 sensor disconnects the compressor motor when the percentage of O. sub. 2 exceeds a predetermined safe limit. A bypass circuit allows the tank to be filled from a high pressure supply without operation of the compressor.