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:
Aug. 16, 1977
Filed:
May. 02, 1975
Donald D Rice, Marshalltown, IA (US);
Herbert H Walton, Marshalltown, IA (US);
Fisher Controls Company, Marshalltown, IA (US);
Abstract
Disclosed herein is a valve trim assembly wherein a valve cage member and a valve plug are provided which cannot be independently rotated. A valve stem is affixed to the plug and extends out of the cage. The cage and the stem are threaded for attachment to a valve bonnet and an actuator, respectively, and by rotation of the cage, the cage is attached to the bonnet and the stem is attached to the actuator simultaneously. The stem is prevented from unscrewing from the actuator while the valve is in use, by means of the anti-rotation feature. The trim assembly can thus be installed in, or removed from, a valve quickly and with a minimum number of tools.