Abstract: A motorized pump is disclosed that includes a flexible diaphragm fitting within a rigid member, a motor drive mechanism for drawing a puller member attached to the diaphragm away from the rigid member to create a space between the diaphragm and the rigid member and form a negative pressure region within that space, and an outlet communicating with the negative pressure region. In one embodiment, the pump provides a negative pressure in a single chamber which can be used to operate one or two breast shield assembles. In another embodiment, the pump is particularly adapted for double-pumping and provides two chambers which generate vacuum.

Abstract: This invention relates to a breast pump which can perform the automatic suction with the following advantages: 1) a breast-milking mother can stop the operation of breast pump immediately, when her breast site feels painful through continual suction, 2) the suction can be immediately made available by re-pushing a switch, thus more convenient to use, 3) since the breast pump has a massage function in addition to the basic suction of human milk, thus removing a breast stiffness in an efficient manner and improve the overall functions of the breast pump, 4) the rapid detachment of the breast pump after use can be accomplished through a suction release value, thus making the separation procedure of breast pump easier, 5) since the induction neck of breast pump is equipped with a separate induction conduit which is extended to the inside of a breast milk bottle, human milk can be directly dropped to the bottle, whereby disinfecting the bottle is unnecessary, and 6) since the breast milk bottle is connected to the

Abstract: A milking system for milking a mammal such as a cow includes a source of vacuum applying vacuum through a conduit system to a plurality of milking clusters, each cluster having a plurality of teat cups supplying milk to a claw in response to pulsation vacuum controlled by a pulsator in the conduit system. The conduit system has a first portion upstream of the pulsator and applying vacuum from the source of vacuum to the pulsator. The conduit system has a second portion downstream of the pulsator and applying pulsation vacuum to the teat cups. The vacuum in the upstream portion of the conduit system is subject to fluctuation due to pulsation vacuum in the downstream portion. A vacuum fluctuation suppression filter is provided in the upstream portion of the conduit system attenuating the noted vacuum fluctuation.