公开(公告)号：US06604391B2

公开(公告)日：2003-08-12

申请号：US10084104

申请日：2002-02-27

Applicant: Michel Vellette ,  Frédérick Le Page ,  Didier Leconte ,  Carl Lapointe ,  Marc St-Pierre ,  Samir Akel

Inventor： Michel Vellette ,  Frédérick Le Page ,  Didier Leconte ,  Carl Lapointe ,  Marc St-Pierre ,  Samir Akel

IPC: F16K3500

CPC classification number: F16K35/10 ,  Y10T70/5624 ,  Y10T70/5633 ,  Y10T137/7256

Abstract: A security lock assembly for a shut-off valve consisting of a valve body and an exterior engageable portion secured to a gate stem so as to rotate the stem. The body has a flange with a hole therein. The security lock assembly comprises a lock disk having a central opening for receiving the engageable portion. Abutment edges are formed integrally with the disk for engagement with the engageable portion so as to rotate therewith. Indentations are formed in a bottom surface of the lock disk at a predetermined position. A pin-lock assembly is retained in the hole of the flange of the valve body. The pin-lock assembly has a pin portion upwardly biased against the lock disk. The pin portion is aligned with the indentation so as to engage therein when the valve stem is rotated to a predetermined closed position, whereby the valve is locked in the predetermined closed position by the pin portion.