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:
Mar. 09, 1993
Filed:
May. 23, 1990
Patrick Damizet, Venissieux, FR;
Aldes Aeraulique, Bussy Saint Georges, FR;
Societe d'Etudes et de Recherche de Ventilation et d'Aeraulique, , US;
Abstract
This device has a housing 2, a motorized vacuum turbine 4 pneumatically connected to outlet 2b of a housing, and at least one tube 6 whose downstream end 6a terminates in housing 2, and structure 13, 40 connected to upstream end 6b of tube 6 capable of generating a temporary pneumatic pressure wave in the direction of its downstream end 6a. The latter is associated with structure 20, 22 for detecting the pressure wave and acting on module 23 for controlling the power to electric motor 3 of vacuum turbine 4 to start the system operating. The pneumatic pressure wave is conveyed by tube 6 itself from its upstream end 6b to its downstream end 6a, this downstream end being provided with a shutoff flap 18, normally held in the closed position and capable of causing the tube to be opened under the influence of the vacuum flow.