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:
Dec. 27, 1988
Filed:
Dec. 11, 1987
Arnold F Decker, Aurora, IL (US);
Roy Reynolds, Crystal Lake, IL (US);
Templeton, Kenly & Co., Broadview, IL (US);
Abstract
A shear seal valve includes a valve body defining an interior valve chamber and a slide member axially movable in the valve chamber. Fluid passages, formed in the valve body and the slide, are selectively interconnected in accordance with the relative position of the slide member within the valve chamber, and tubular shear seals, biased tightly against the slide, avoid fluid leakage along the slide. To provide low-friction sliding movement of the slide relative to the slide body, a pair of roller bearings are supported by the valve body so as to engage the slide. By mounting the roller bearings to the valve body rather than to the slide itself, the slide can be made smaller, and greater freedom in the location of the fluid passages within the slide is obtained. To simplify construction and assembly, the roller bearings are mounted in a removable cover plate forming a part of the valve body and defining one wall of the interior valve chamber. Preferably, the tubular shear seals include frusto-conically shaped flanges for limiting movement of the seals and for avoiding the development of cocking forces on the seals.