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:
Apr. 02, 2013
Filed:
Mar. 17, 2010
Antonio Crotti, Offanengo, IT;
Franco Fermini, Offanengo, IT;
Antonio Crotti, Offanengo, IT;
Franco Fermini, Offanengo, IT;
VHIT S.p.A., Offanengo, IT;
Abstract
A rotary vacuum pump comprises, between the rotor () and a driving motor, a control unit () for operatively connecting the pump and the motor only in the periods in which the pump operation is required or desired. The control unit () includes: a rotating member () connected to a motor output and arranged to be made integral for rotation with the pump rotor () when the pump operation is required or desired; a plurality of coupling elements (), which are located between the rotating member () and an element () belonging to or integral for rotation with the pump rotor (), and which are arranged to take a coupling position or a decoupling position to make the rotating member () and the rotor () integral for rotation, or to make the rotating member () and the rotor () independent of each other, respectively; and actuating members () for actuating said coupling elements (), which actuating members are driven by said rotating member () so as to take a first position and a second position in the periods where the pump is operating and in the periods where the pump is not operating respectively.