Pulsator for Milking Machines (Patent No: 214640)

Inventor: Maes, Robert

Location: Calgary

Comments: N/A

Description: Robert Maes, Calgary, Alberta, Canada, 13th December, 1921. Filed 20th December, 1920. Receipt No. 340,474.

Claim.—1. A pulsator for milking machines and the like, in combination with a teat cup and vacuum extracting device, a hollow cylindrical member, a piston slidable within the said cylinder, a cam securely mounted around the central rod of the piston, an expanding member adapted to engage around the surface of the said cam, a slide valve exteriorly engaging the interior walls of the said cylinder, having an interior groove within which the expanding member is retained, the said slide being given motion by the action of the expanding member co-acting upon the tapering surface of the cam and operating air and vacuum valves so as to reverse the direction of the vacuum and air pressures, all substantially as described.

2. A pulsator for milking machines and the like, the combination of a slidable plunger within a hollow cylinder adapted to receive atmospheric air pressure upon one face and vacuum suction upon the other face simultaneously, a cam securely mounted upon the piston rod adapted to engage an expanding member mounted in a groove in a slide valve, the said expanding member when the point of maximum expansion is reached contracting and causing the slide to travel within the said cylinder, closing one set of cylinder ports and opening another set which reverses the direction of the atmospheric and vacuum influence upon the said plunger, all substantially as described.

Claims allowed, 2.