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:
Oct. 12, 2004
Filed:
Jul. 24, 2002
Jürgen Heun, Dortmund, DE;
Markus Löbel, Witten, DE;
Jörg Führmann, Weisendorf, DE;
Demag Cranes & Components GmbH, Wetter, DE;
Abstract
A flow regulating apparatus for a fluid, in particular a pneumatic choke valve, includes a housing having an inlet port and an outlet port fluidly connected by a choke channel. A throttling piston is disposed in the choke channel for movement in longitudinal direction between an initial position and an end position. The throttling piston includes a tapered section to define with the choke channel an overflow passage whose cross section is dependent on a position of the throttling piston, wherein the tapered section is configured such that a movement of the throttling piston from the initial position to the end position results in a progressive increase of the cross section of the overflow passage.