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. 15, 1977
Filed:
Apr. 24, 1975
Curtis W Clarkson, Palo Alto, CA (US);
The J. R. Clarkson Company, Palo Alto, CA (US);
Abstract
A packingless gate valve actuator assembly having a stepped through passage defined by respective half housings formed with passages of different diameter and respective bolt connector flanges disposed in face to face relation with spacer strips interposed between diametrically opposite flange face margins to define a laterally related gate passage, a compressible elastomeric liner sleeve fitted to the passage of greater diameter with its opposite ends protruding axially from the passage ends and the end opposed to the flange face defining the end of the smaller diameter passage formed to span the gate passage and provide a protruding lip sealingly engaging the last mentioned flange face in annular surrounding relation to the smaller diameter passage end, a gate having a leading knife edge slidingly mounted in the gate passage with the lead tip of the knife edge disposed to enter the line of seal and deform the lip into sealing engagement with the opposed face of the knife edge and gate in its reciprocal movement in the gate passage, an actuator lever selectively pivoted upon an extension of one of the spacer strips and pivotally connected to the gate to effect controlled movement of the gate between its open and closed positions.