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. 02, 1991
Filed:
May. 01, 1990
Eric J Butterfield, Cary, NC (US);
Emco Wheaton, Inc., Cary, NC (US);
Abstract
A float chamber located in generally parallel, laterally spaced relationship to the main liquid flow passageway contains superimposed floats that move along a substantially linear path of travel. The floats cooperate with other control components to effect closure of a main valve assembly when the liquid level adjacent the mechanism reaches a preselected first elevation, and to close a bleed valve assembly when the liquid level reaches a second, higher elevation. The main valve assembly includes a movable plate valve that is spring biased toward an open position and that is biased toward a closed position by the force of liquid adjacent thereto and upstream therefrom. A latch and associated catch prevent movement of the valve plate to its closed position until such time as the liquid level reaches the first elevation.