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:
Jul. 01, 2014
Filed:
Feb. 19, 2013
Applicant:
Duerr Dental Ag, Bietigheim-Bissingen, DE;
Inventor:
Alfred Deubler, Freiberg, DE;
Assignee:
Duerr Dental AG, , DE;
Primary Examiner:
Int. Cl.
CPC ...
F16K 31/40 (2006.01); F17D 1/04 (2006.01); F04B 49/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A check valve comprising a valve housing, which comprises an inlet, an outlet, and a valve channel. The valve channel connects the inlet to the outlet and has a valve seat. The check valve further comprises a closure part, which cooperates with the valve seat, and a tappet bearing the closure part. An end of the tappet which is remote from the closure part bears a control piston, which together with a cylinder wall defines a control chamber, which is connected a control connection. The control chamber is connected to the valve channel by means of a connection channel.