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:
Dec. 10, 1990
Applicant:
Inventors:
Assignee:
List AG, CH-Pratteln, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10J / ;
U.S. Cl.
CPC ...
414217 ;
Abstract
A lock for the loading and/or discharging of, in particular, not easily flowing, adhering bulk materials into or out of a pressurized or vacuum chamber through a discharge opening of a discharge housing, the operating chamber being adjoined by a housing having an inlet connector. Guided in this housing is a piston which transports the bulk material from the inlet connector to the discharge housing. During this procedure, the discharge housing is closed off in relation to the housing by an openable valve.