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. 03, 1990
Filed:
Aug. 12, 1987
Applicant:
Inventors:
Roy O Christianson, Blomkest, MN (US);
Frank W Christianson, Blomkest, MN (US);
Assignee:
Christianson Systems, Inc., Blomkest, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
406 39 ; 181265 ; 406109 ; 406157 ; 406171 ; 406173 ;
Abstract
A silencer (70) which is particularly adapted for use with a pneumatic grain conveyor (10) includes a housing (72) with an arrangement of internal baffles (78, 80 and 82) defining a serpentine flow path of increasing cross-sectional area between an inlet (74) and an outlet (76) which is self-cleaning and effects noise reduction without absorptive material that would otherwise quickly clog the silencer.