Patent ID: 11911642
Assignee: WASHINGTON SUBURBAN SANITARY COMMISSION
Field: Environmental technology (Chemistry)
Classification: CPC A  B  E | IPC A  B

Claim 14:
15. A method comprising:
using a valve key that defines:
at least one receptacle, wherein each receptacle of the at least one receptacle is configured to receive a respective one of the first and second ring tabs, wherein each receptacle of the at least one receptacle defines:
a first face that is configured to bias against the first side of said respective one of the first and second ring tabs; and
a second face that is configured to bias against the second side of said respective one of the first and second ring tabs; and

lowering the valve key into the fire hydrant until said respective one of the first and second ring tabs of the fire hydrant are received within a corresponding receptacle of the at least one receptacle.