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:
Jul. 13, 1993
Filed:
Apr. 28, 1992
Donald K Mayer, Bloomington, MN (US);
Thermo King Corporation, Minneapolis, MN (US);
Abstract
A refrigerant compressor system suitable for transport refrigeration applications, including a refrigerant compressor, an electric motor and a hydraulic motor directly coupled together within a common housing. The electric motor includes a stator and a rotor, with the rotor having first and second axial ends. The refrigerant compressor is coupled to the first axial end of rotor, and the hydraulic motor is coupled to the second axial end. A single housing surrounds the electric motor, the refrigerant compressor, and the hydraulic motor. Hydraulic fluid for driving the hydraulic motor is selected to be compatible with the lubricating oil of the refrigerant compressor, such that leakage of hydraulic fluid into the housing will not adversely affect operation of the refrigerant compressor system. The housing is directly connected to a selected side of an associated refrigeration system, with the suction side being preferred, enabling the housing to also function as a refrigerant accumulator.