The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 1978
Filed:
Feb. 18, 1977
Francis J Sisk, Apollo, PA (US);
Stephen E Veyo, Murrysville, PA (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A heat pump is disclosed which has a compressor, an indoor condenser (for winter heating), outdoor evaporator (for winter heating) and piping for flowing a refrigerant between the compressor, the condenser and the evaporator. A second refrigerant loop is formed which bypasses the compressor and communicates with the condenser outlet and intake. A liquid metering pump flows liquid refrigerant from the outlet of the condenser via a fuel, e.g., liquid petroleum gas fired refrigerant vaporizer back to the condenser intake so that auxiliary heat from the burner for heating an indoor space by feeding to the condenser heated refrigerant vapor in addition to the refrigerant vapor supplied to the condenser by the compressor.