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:
Sep. 17, 2013
Filed:
Oct. 25, 2006
Applicant:
Alan M. Schulman, Riverwoods, IL (US);
Inventor:
Alan M. Schulman, Riverwoods, IL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 15/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system is provided for reducing noise produced by a falling liquid column in a discharge line connected to a sump pump through a flapper valve, when the flapper valve is moved from an open position to a closed position. The system includes a closed-end tube in fluid communication with the flapper valve and the discharge line to receive a portion of the residual head of liquid in the discharge line upon closing of the flapper valve when the pump is turned off.