Pilfer proof valve

Claim 2

A pilfer-proof valve comprising a valve body having a bore and having inlet and outlet ports communicating with said bore, and a valve member mounted to move in said bore between open and closed positions connecting and disconnecting said ports, the improvement in said valve comprising, a hole extending generally radially through said valve member and threaded along at least part of its length, an opening formed in the inner wall of said bore and leading to the outside of said valve body, one end of said hole registering with said opening when said valve member is in said closed position, a seat on the inner wall of said bore and alined with the other end of said hole when said valve member is in said closed position, and a locking screw threaded into said hole and having one end movable between locked and unlocked positions projecting into and retracted out of said seat in response to turning of a tool inserted through said opening and detachably connected in torque-transmitting engagement with the other end of the screw.

Claim 3

A pilfer-proof valve as defined in claim 1 in which said opening is offset angularly from said hole.

Claim 4

A pilfer-proof valve as defined in claim 1 in which said seat comprises a second opening formed in the inner wall of said bore opposite said one opening.

Claim 5

A pilfer-proof valve as defined in claim 1 in which a first portion of said hole adjacent said seat is threaded and has a predetermined diameter and in which a second portion of said hole adjacent said opening is of lesser diameter thereby to prevent withdrawal of said screw out of said hole through said opening.

Claim 6

A pilfer-proof valve comprising a valve body having a bore and having inlet and outlet ports communicating with said bore, and a valve member mounted to rotate in said bore between open and closed positions connecting and disconnecting said ports, the improvement in said valve comprising, a hole extending generally radially through said valve member and threaded along at least part of its length, an opening formed in the inner wall of said bore and leading to the outside of said valve body, said hole registering with said opening when said valve member is in said closed position, a seat on the inner wall of said bore and alined with said hole when said valve member is in said closed position, and a locking screw threaded into said hole and having one end movable between locked and unlocked positions projecting into and retracted out of said seat in response to turning of a tool inserted through said opening and detachably connected in torque-transmitting engagement with said screw.

Claim 7

A pilfer-proof valve comprising a valve body having a bore and having inlet and outlet ports communicating with said bore, and a valve member mounted to rotate in said bore between open and closed positions connecting and disconnecting said ports, the improvement in said valve comprising, a hole extending generally radially through said valve member and threaded along at least part of its length, an opening formed in the inner wall of said bore and leading to the outside of said valve body, said hole registering with said opening when said valve member is in said closed position, a seat on the inner wall of said bore and alined with said hole when said valve member is in said closed position, and a locking screw threaded into said hole and having one end movable between locked and unlocked positions projecting into and retracted out of said seat in response to turning of a tool inserted through said opening and detachably connected in torque-transmitting engagement with said screw.

Claim 8

A pilfer-proof valve comprising a valve body having a bore and having inlet and outlet ports communicating with said bore, and a valve member mounted to rotate in said bore between open and closed positions connecting and disconnecting said ports, the improvement in said valve comprising, a hole extending generally radially through said valve member and threaded along at least part of its length, a first opening formed in the inner wall of said bore and alined radially with said hole when said valve member is in said closed position, a second opening formed in the inner wall of said bore and located generally opposite of said first opening, said second opening being offset angularly from said hole and leading to the outside of said valve body, and a locking screw threaded into said hole and having one end movable between locked and unlocked positions projecting into and retracted out of said first opening in response to the turning of a laterally flexible tool threaded through said second opening and into said hole and detachably connected in torque-transmitting engagement with the other end of the screw.

Claim 9

A pilfer-proof valve comprising a valve body having a bore and having inlet and outlet ports communicating with said bore, and a valve member mounted to rotate in said bore between open and closed positions connecting and disconnecting said ports, the improvement in said valve comprising, a hole extending generally radially through said valve member and threaded along at least part of its length, a first opening formed in the inner wall of said bore and alined radially with said hole when said valve member is in said closed position, a second opening formed in the inner wall of said bore and located generally opposite of said first opening, said second opening being offset angularly from said hole and leading to the outside of said valve body, and a locking screw threaded into said hole and having one end movable between locked and unlocked positions projecting into and retracted out of said first opening in response to the turning of a laterally flexible tool threaded through said second opening and into said hole and detachably connected in torque-transmitting engagement with the other end of the screw.