Patent ID: 7412988

Claim:
A pneumatic level control, comprising: a first housing and a second housing attached to said first housing; a float assembly pivotally attached to said first housing; said float assembly comprising a float arm having a first and a second end; a float attached to said first end of said float arm; a counterweight attached to said second end of said float arm; said counterweight being pivotally attached to said first housing; a rotatable rod having a first end and a second end; said first end of said rod in communication with said counterweight for converting pivotal motion of said float assembly into rotational motion; a cam housed within said second housing; said cam having a base and a cylindrical sidewall; said base of said cam rotatably attached to said second end of said rotatable rod; wherein a section of said cylindrical sidewall of said cam has a sloped surface; a flexible, cantilever spring having a first end and a second end; said first end of said spring secured to said second housing; said second end of said spring in contact with said cylindrical sidewall of said cam; wherein said spring flexes between a first position and a second position based on the rotation of said cam; a three-way valve assembly attached to said housing; said valve assembly comprising at least one inlet port, at least one vent port and at least on outlet port; a first channel between said valve assembly and said second housing; a second channel disposed longitudinally within said valve assembly and interconnected with said ports; a shuttle slideably disposed within said second channel; said shuttle being slideable between a first shuttle position and a second shuttle position; wherein air flow between said valve assembly and said second housing is regulated by flexing said spring between said position and said second position; and wherein air flow out of said outlet port is regulated by sliding said shuttle between said first shuttle position and said second shuttle position.