Locks – Special application – For control and machine elements
Patent
1978-09-25
1982-09-14
Foss, J. Franklin
Locks
Special application
For control and machine elements
70 34, 137384, G05G 500, F16K 3500
Patent
active
RE0310271
ABSTRACT:
Locking hood assembly for mounting on a gas service head valve of the lubricated plug type to prevent unauthorized opening of the valve. Locking hood assembly comprises a generally cylindrical main body or hood which covers the valve stem and stop collar when it is mounted on the valve thus preventing valve operation, the hood being attached to the valve using the removable buttonhead grease fitting which is conventionally an element of the valve itself. Assembly further comprises a cover cap which conceals the grease fitting after the hood is mounted on the valve; and a barrel lock which locks the cover cap to the main body or hood. The main body further has an enlarged, generally oval-shaped, peripherally extending skirt portion which fits over the oval-shaped gland seal cover plate of the valve when the hood is in place and prevents access to the gland seal cover bolts and to the normal spacing between the gland seal cover and the valve housing.
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