Safety locking arrangement
AssigneeCorning Incorporated
InventorLawrence J. Morris
Life of this patent
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Abstract
A safety locking arrangement is provided on a valve for control of fluid flow comprising a valve body having a seat with a flow passage passing therethrough and a valve closure member located within the body. The valve closure member is adapted to engage the seat to effect closure of the valve. The valve closure member is carried by a cap adapted to enter into screw-threaded engagement with the valve body at the mouth thereof. To ensure retention of the cap on the body, the cap additionally enters into screw-threaded engagement with an annular retaining means disposed around and formed separately from the valve body, with the valve body itself being so formed in the mouth region that the retaining means cannot be withdrawn therefrom merely by rotation and/or displacement lengthwise of the valve body.
Claims13
A valve for the control of fluid flow, comprising a valve body having a valve seat with a flow passage passing through the seat and a valve closure member located within the body, which valve closure member is adapted to engage the seat to effect closure of the valve, the valve closure member being carried by a cap adapted to enter into screw-threaded engagement with the valve body at a mouth region thereof, wherein the cap enters into screw-threaded engagement with an annular retaining means disposed externally around and formed separately from the valve body, said retaining means being captured by said cap and caused to move with said cap axially along said valve body in response to movement of said cap, and the valve body is so formed in said mouth region that the retaining means and cap means is not able to be withdrawn therefrom by just rotation or displacement lengthwise of the valve body when the valve closure member is in its fully open position.
Dependencies are inferred from the claim text.