Fluid mover

A fluid mover comprising:

• a housing having a cylindrical inside wall surrounding an internal chamber, a shaft extended through the chamber, means rotatably mounting the shaft on the housing, a piston located in the chamber, means securing the piston to the shaft, said piston having a cylindrical outer wall having a diameter smaller than the diameter of the inside wall of the housing and an axis offset from the axis of the shaft, said housing having a fluid intake passage and a fluid exhaust passage open to the chamber and a cavity between the intake and exhaust passages open to the chamber, baffle means located in the cavity for controlling the flow of fluid through the chamber during rotation of the piston in the chamber, said baffle means having a face located in continuous close relationship with the outer wall of the piston during rotation of the piston in the chamber, eccentric cam means secured to the shaft, and means connected to the baffle means and engageable with the cam means for moving the baffle means in the cavity to maintain the face of the baffle means in close relation to the outer wall of the piston during turning of the piston in the chamber when torque is applied to the shaft whereby the turning piston moves fluid from the fluid intake passage, through the chamber, and forces fluid out of the chamber through the fluid exhaust passage, said means connected to the baffle means comprise generally flat cam follower members located in pockets in the housing adjacent opposite ends of the piston, said housing having linear walls engageable with the cam follower members to allow only linear reciprocating movement of the cam follower members, said cam follower members each having a generally ovaloid shaped wall surrounding an opening, a first cam having an eccentric outer wall located in the opening in one cam follower member, and a second cam having an eccentric outer wall located in the opening in the other cam follower member, means connecting the cam follower members to the baffle means whereby rotation of the first and second cams reciprocate the cam follower members and baffle means in timed relation with the turning of the piston in the chamber to move fluid through the chamber.

A fluid mover comprising:

• a housing having a cylindrical inside wall surrounding an internal chamber, a shaft extended through the chamber, means rotatably mounting the shaft on the housing, a piston having a cylindrical outer wall located in said chamber, said cylindrical outer wall having a diameter smaller than the diameter of the inside wall of the housing and an axis offset from the axis of the shaft, means securing the piston to the shaft, said housing having a fluid intake passage and a fluid exhaust passage open to the chamber and a cavity between the intake and exhaust passages open to the chamber, baffle means located in the cavity for controlling the flow of fluid through the chamber during turning of the piston in the chamber, said baffle means having a portion located in continuous close relationship with the outer wall of the piston during turning of the piston in the chamber, eccentric cam means secured to the shaft for turning with the shaft, said cam means having an axis offset from the axis of the shaft, cam follower means engageable with the cam means having linear reciprocal movement in response to turning of the cam means, and means connecting the baffle means to the cam follower means whereby the baffle means moves in the cavity to maintain the portion of the baffle means in close relation to the outer wall of the piston during turning of the cam means and the piston in the chamber when torque is applied to the shaft, said turning piston moves fluid from the fluid intake passage, through the chamber, and forces fluid out of the chamber through the fluid exhaust passage.