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:
Nov. 11, 2003
Filed:
Jun. 14, 2002
Benedict J. Dolcich, Westerville, OH (US);
Liebert Corporation, Columbus, OH (US);
Abstract
A method and apparatus is disclosed to relieve liquid pressure from a receiver to a condenser in a cooling system that operates under a variety of ambient temperature conditions. To relieve excess pressure in the receiver and to prevent the venting of refrigerant through a relief valve, a pressure-balancing system is connected between the condenser and the receiver of the cooling system. In one embodiment, the pressure-balancing system includes a check valve and a pressure-balancing valve. The pressure-balancing valve bypasses the check valve. The check valve permits the flow of refrigerant in one direction from the condenser to the receiver. The pressure-balancing valve permits the flow of refrigerant in an opposite direction from the receiver to the condenser in order to maintain the pressure in the receiver below a maximum pressure level. The pressure-balancing valve may be installed on a bypass line parallel to the check valve. Alternatively, the check valve and the pressure-balancing valve may be installed in a single body.