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:
Oct. 20, 2026
Filed:
Jul. 10, 2024
Lennox Industries Inc., Richardson, TX (US);
Shailesh Manohar, Coppell, TX (US);
Eric Berg, The Colony, TX (US);
Umesh Gokhale, Coppell, TX (US);
Vijay Sathyamurthi, Frisco, TX (US);
Daniel Diaz, Irving, TX (US);
Lennox Industries Inc., Richardson, TX (US);
Abstract
A method for performing a pump down cycle to isolate an indoor section of a heating, ventilation, and air conditioning (HVAC) from an indoor section of the HVAC system is disclosed. The method includes transmitting a first control signal to a compressor of the HVAC system. The first control signal causes the compressor to turn on or stay turned on. The method further includes transmitting a second control signal to a vapor line isolation valve. The second control signal causes the vapor line isolation valve to open. The method further includes transmitting a third control signal to a liquid line isolation valve. The third control signal causes the liquid line isolation valve to close. The method further comprises determining that a refrigerant charge in the indoor section has become less than a threshold value. In response, the compressor is turned off and the vapor line isolation valve is closed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile