High aspect ratio threadform

Details High aspect ratio threadform High aspect ratio threadform

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 3/30 (2006.01) F16B 33/02 (2006.01) F16K 31/50 (2006.01)

Patent

CA 2659889

A threadform for a gate valve has a set of threads on a stem that engage a threaded receptacle of the gate. When the stem is rotated, the gate moves. The threads have a thread height to thread base thickness ratio that is at least the inverse of 0.7 times e raised to 0.388 divided by a nominal thread diameter of the threads. That ratio is at least 1.1.

L'invention concerne un filetage de soupape à vanne qui présente un ensemble de filets sur une tige qui se visse dans un réceptacle fileté de la vanne. Lorsque la tige est tournée, la vanne se déplace. Les filets présentent un rapport de la hauteur du filet sur l'épaisseur de base du filet qui est égal à au moins l'inverse de 0.7 fois e élevé à la puissance 0,388 divisé par le diamètre de filet nominal des filets. Ce rapport est au moins égal à 1,1.

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