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. 03, 1978
Filed:
Jun. 01, 1977
Paul Lubbehusen, Ravensburg-Durnast, DE;
Waeschle Maschinenfabrik GmbH, Ravensburg, DE;
Abstract
Apparatus for discharging bulk material into a pneumatic conveyor conduit has two chambers, one disposed above the other, the upper chamber having an inlet orifice controllable by a pivotal closure flap and the lower chamber communicating with an outlet orifice from the upper chamber, also controllable by a pivotal closure flap. The flaps are balanced as by counterweights so as to leave their respective orifices virtually completely open in the absence of outside force acting on the flaps, and pressure nozzles are disposed adjacent the flaps in their fully open position, to assist movement towards their closed positions as required. A level sensing means is arranged in the lower chamber to sense when material therein drops to a predetermined level, for re-filling of the chamber from the upper chamber.