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, 1992
Filed:
May. 29, 1991
Leybold AG, Hanau, DE;
Abstract
A rotary vane vacuum pump includes a pump housing; a bearing support having a bearing bore; a drive motor having an output shaft extending into the bearing bore; and a pump rotor accommodated in the pump housing and having a rotor shaft extending into the bearing bore. The rotor shaft and the output shaft have respective radial end faces oriented towards one another and the output shaft and the rotor shaft have identical diameters. There is further provided a torque-transmitting coupling connecting the output shaft with the rotor shaft at respective radial end faces thereof; a first sealing ring situated in the bore and sealingly surrounding the output shaft; a second sealing ring situated in the bore and sealingly surrounding the rotor shaft; and a lubricant chamber formed by a part of the bearing bore and being bounded and sealed by the first and second sealing rings.