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Class Information
Number: 137/630.21
Name: Fluid handling > Systems > Sequentially progressive opening or closing of plural valves > Lost motion > Rotary concentric valves
Description: Systems in which the valves rotate about a common axis, one valve having relative motion with respect to and within the other, and having a lost motion connection between one of the valves and the actuator, or the other valve.

Patents under this class:

Patent Number Title Of Patent Date Issued
6192922 Airflow control valve for a clean room Feb. 27, 2001
4836163 Throttle-butterfly connector piece for an internal combustion engine Jun. 6, 1989
4662394 Tight shut-off valve with flow control element May. 5, 1987
4577662 Plug valve equipped with pressure equalization means Mar. 25, 1986

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