F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 31/54 (2006.01) F16K 21/04 (2006.01)
Patent
CA 2179851
An automatic return mechanism for valves, such as quarter turn valves, including a body having a flow passage, a valve member rotatably mounted in the flow passage and movable between open and closed positions and a stem connected to the valve and having an outer portion accessible from the exterior of the valve body. The return mechanism has an elongated housing defining an elongated chamber, a drive shaft rotatably mounted in the housing and having one end operably connected to the outer end portion of the valve stem, an intermediate portion disposed in the chamber and carrying a pinion gear, an outer end portion extending outwardly from the housing, a manually-operated handle connected to the outer end portion of the drive shaft, a pair of rack members mounted inside the chamber for reciprocative movement in opposite longitudinal directions and having teeth mesh with diametrically opposed sectors of the pinion teeth and a spring disposed between one end of each rack member and an end wall of the chamber for biasing the rack members toward an open or closed position. After the valve member has been moved from its original position with the handle, upon releasing the handle, the springs return the rack members to their original positions, causing rotation of the pinion gear to return to valve member to its original position.
Milwaukee Valve Company Inc.
Smart & Biggar
LandOfFree
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