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:
Feb. 26, 2002
Filed:
Apr. 07, 1999
Applicant:
Inventor:
Göran Rydin, Täby, SE;
Assignee:
Siemens Elema AB, Solna, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 3/104 ;
U.S. Cl.
CPC ...
F16K 3/104 ;
Abstract
A valve for regulating a gas flow has a valve seat and a valve body, movable against the valve seat. The valve achieves high accuracy, a wide dynamic range and high operating reliability by causing the valve body substantially only to move axially against the valve seat and by using a stepper motor to actuate the valve body's axial movement against the valve seat with a non-linearly threaded engagement between the stepper motor and valve body so that the valve body performs continuous, non-linear, axial movement against the valve seat.