Leakproof one-way valve for use with vacuum attachment
Leakproof seal for turning closure valve, and its manufacture
Level control arrangements for fuel tanks
Level control valve arrangement and water closet cistern
Level controller
Lever and cam actuated needle-valve
Lever handle for sanitary valves
Lever operated control valve
Lever positioning device for valve actuator
Lever-actuated high-pressure gas tap adjustable to different...
Lever-actuated, hand-held power tool
Lift check valve with dashpot
Lift plug valves
Lift valve with pressure balanced pilot operated valve member
Lift-type check valve
Light emitting apparatus in tap water responding to water...
Light operated valve position indicating system
Lighter with improved thermodynamics
Limited float seat construction for expanding gate valve
Limiting device for single control mixing valve