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. 11, 1990
Filed:
Sep. 21, 1988
Gerald L Terwilliger, Bristol, VA (US);
Bristol Compressors, Inc., Bristol, VA (US);
Abstract
Refrigerant compressor construction having a cylinder, a piston mounted for reciprocation in the cylinder, a cylinder head mounted over the end of the cylinder to provide a compression chamber, and refrigerant discharge valving in the cylinder head or a valve plate assembled thereto adapted to open a discharge passage for pressurized refrigerant on the compression stroke of the piston means and to close the discharge passage on the suction stroke of the piston, a first suction gas inlet passage through the wall of the cylinder at a position remote from the cylinder head, a second suction gas inlet passage in the piston extending through the outer wall thereof and in continuous communication with the first passage, a suction gas port in the top of the piston in communication with the second passage, the port having a valve seat formed in the top of the piston and a valve disc mounted on the top of the piston for limited axial, floating movement and having a sealing surface adapted to bear against the valve seat on the compression stroke of the piston to close the second passage from the compression chamber, the floating movement being sufficient for movement of the sealing surface away from the valve seat to provide the suction gas port with suitable open dimensions to allow adequate low-pressure refrigerant gas glow into the compression chamber during the suction stroke of the piston.