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:
Nov. 13, 1990
Filed:
Nov. 20, 1989
Richard B Reich, Midlothian, VA (US);
George W Feild, Crofton, MD (US);
Robertshaw Controls Company, Richmond, VA (US);
Abstract
A valve construction and method of making the same are provided, the valve construction comprising a housing having an inlet and an outlet and a valve seat adapted to be interconnected to the inlet and the outlet, a movable valve member carried by the housing and being operatively associated with the valve seat to control fluid flow therethrough from the inlet to the outlet, and a stepper motor carried by the housing and being operatively interconnected to the movable valve member to move the movable valve member relative to the valve seat to control the fluid flow through the valve seat, the movable valve member comprising a flexible part for sealing closed the valve seat when the stepper motor moves the flexible part against the valve seat and a throttlling part extending beyond the flexible part and into the valve seat to throttle the fluid flow therebetween when the stepper motor has moved the flexible part away from the valve seat and the throttling part has a portion thereof disposed in the valve seat.