Fixture

A fixture for selectively positioning a work piece using suction, the fixture comprising:

• a housing having:
• a first end;
• and
• a second end opposite the first end;
• wherein, a receiving chamber with an inner surface is defined in the housing extending from the first housing end into the housing toward the second housing end;
• and
• wherein, the second housing end includes one or more suction holes communicating with the receiving chamber;
• and
• a gas valve having:
• a valve body with a first end, a second end opposite the first end and a peripheral surface connecting the valve body first end to the valve body second end, the valve body having a defined first channel, a defined first through hole extending substantially parallel with the first defined channel, a second through hole spaced apart from the first through hole and the first defined channel, and a first defined connecting hole connecting the first defined channel with the peripheral surface of the valve body;
• wherein, the first through hole communicates with the first defined channel and the second through hole communicates with the first defined channel;
• and
• wherein, a portion of the valve body is received within the housing receiving chamber with the first end of the housing coupled to the peripheral surface of the valve body with the first housing end, a portion of the peripheral valve body surface and a portion of the receiving chamber inner surface cooperating to define a gas chamber;
• and
• a piston movably received within the defined first channel;
• wherein, pressurized gas flowing into the first through hole moves the piston to a first position allowing the first connecting hole to communicate with the second through hole, and the pressurized gas flowing into the first defined channel moves the piston to a second position blocking communication between the first connecting hole and the second through hole.