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. 16, 1985
Filed:
Aug. 14, 1984
Ronald P Lehrach, Glastonbury, CT (US);
United Technologies Diesel Systems, Inc., Springfield, MA (US);
Abstract
A normally-open, solenoid-controlled valve includes a stationary valve-seat spindle and a cylindrical valve sleeve encircling and slideable along part of the valve-seat spindle. The valve-seat spindle has an annular control edge and the valve sleeve includes a pressure-responsive surface which is reciprocably moved into and out of valve-closing contact with the control edge. The valve-seat spindle includes a flow passage therein extending to and discharging into a plenum region formed radially inward of the control edge between the spindle and the sleeve. The pressure-responsive surface of the valve sleeve is a substantially continuous frustrum of a cone whose apex extends in the direction of the valve opening and which extends radially outward from a sleeve inner diameter A to an outer diameter C (point C) of discontinuity in that surface. Point C is radially outward of the spindle and sleeve centerline at least as far as the point of intersection, B', with that frustoconical pressure-responsive surface of a line normal to the surface and extending through the control edge D when the sleeve is fully-open. The minimum radial positioning of discontinuity point C is a function of the angle of the pressure-responsive surface and the stroke of the sleeve. The high pressure plenum is structured to enhance the valve-opening rate.