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:
Aug. 07, 1990
Filed:
Dec. 06, 1988
Applicant:
Inventors:
Assignee:
Waeschle Maschinenfabrik GmbH, Ravensburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
222368 ; 222542 ; 414189 ; 414220 ; 414301 ;
Abstract
A rotary feeder includes a housing which accommodates a rotor extending between two lateral disk members. Bearing against the peripheral area of each disk member is a slide ring which is acted upon by a pressure fluid with a constant holding force by which the slide ring is pressed against the associated disk member. Thus, the axial sealing of the rotor within the housing is independent of the wear of the slide ring. In addition to the holding pressure, the slide rings may also be subjected to a momentary displacement force which exceeds the holding force and ensures that the slide rings overcome frictional forces in the area of their guides.