Patents by Inventor Clayton Lemal

Clayton Lemal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Heat pump
    Patent number: 4584844
    Abstract: A heat pump system suitable for northern climates which utilizes a pressure limiting device that reduces pressure and capacity of the system in the cooling mode so as to allow a higher capacity in the heating mode for a given compressor-motor power rating. The pressure limiting device also alleviates problems associated with system reversal, such as for periodic outdoor heat exchanger defrosting.
    Type: Grant
    Filed: September 4, 1984
    Date of Patent: April 29, 1986
    Assignee: Canadian Patents and Development Limited
    Inventor: Clayton Lemal