Patent ID: 7030743

Claim:
A pressure indicator comprising: a housing having first and second ends, said housing having a transparent portion at the second end of said housing; a base having first and second ends, said base having an opening defining a passage therethrough, said second end of said base being mounted to said first end of said housing; first and second magnetic members rotatably mounted within said housing, said second magnetic member having first and second portions with first and second different visual characteristics respectively; a pressure to linear motion translator coupled to said first magnetic member and operative to produce linear motion responsive to variations in pressure so as to produce rotational movement of the first magnetic member in response to variations in pressure in communication with said translator through said passage; in response to pressure below a first predetermined value applied to said translator through said passage, said first magnetic member being rotatable generally into a first actuator orientation and, in response to pressure above a second predetermined value applied to said translator through said passage, said first magnetic member being rotatable generally into a second different actuator orientation; said second magnetic member being magnetically responsive to said first magnetic member being in said first actuator oriention to rotate into a first indicator orientation in which said first visual characteristic is viewable through said transparent portion and second magnetic member being magnetically responsive to said first magnetic member being in said second actuator orientation to rotate into a second indicator orientation in which said second visual characteristic is viewable through said transparent portion.