Latched valve handle
AssigneeE. I. Du Pont de Nemours and Company
InventorClaude R. Carman
Life of this patent
Estimating the term…
Abstract
A latching device for the actuator in a valve installation. The actuator includes a handle for rotating a valve stem and a latch slidably mounted on the handle. The latch has one edge which abuts a stop when in the closed position and an opposed, angularly disposed, camming edge facing a stop at the open position.
Claims3
In a valve installation including a valve body and a valve element, said valve body having at least a pair of exterior recesses presenting stops thereon corresponding to open and closed positions of said valve element, a pivoted actuating handle and a latch slidably mounted on the handle for movement into and from the recesses, said latch being manually slidably upwardly on the actuating handle out of actuating handle out of one of said recesses corresponding to said closed position so that the handle can be pivoted toward to open position, wherein when said handle reaches the open position said latch can be slidably moved down the handle into the other one of said recesses for holding the valve element in the open position, the improvement comprising provision of an angularly disposed edge on the latch, facing the stop corresponding to the open position, for automatically camming the latch over that stop as the handle is pivoted toward the closed position.
A valve installation including a body having a passage therethrough, a movable element in the passage, a rotatable stem extending from the element through the body, a pivoted handle for rotating the stem, and a latch slidably mounted on the handle for movement into and from at least a pair of recesses and having stops defined by said recesses on the body corresponding to open and closed positions of said movable element, said latch being manually slidably upwardly on the handle out of one of said recesses corresponding to said closed positions so that the handle can be pivoted toward the open position, wherein when said handle reaches the open position said latch can be slidably moved down the handle into the other one of said recesses for holding the movable element in the open position, the improvement comprising said latch having a first edge for latching engagement with one of said stops in the closed position and an opposed, angularly disposed edge for automatically camming the latch over the other one of said stops as the handle is pivoted toward the closed position.
Dependencies are inferred from the claim text.