30-01-2014 дата публикации
Номер: US20140031744A1
Принадлежит:
A milk expressing device capable of simulating a baby's suckling includes first and second vacuum sources, a throttle hole, a solenoid relief valve, first and second tubes, a breast shield, and a control circuit board. The first tube connecting the first vacuum source and the breast shield is provided with the throttle hole to communicate with the atmosphere. When the first vacuum source is turned off, negative pressure in the first tube and the breast shield disappears slowly through the throttle hole. The second tube connecting the second vacuum source and the breast shield is provided with the solenoid relief valve to communicate with the atmosphere. When the solenoid relief valve is activated, negative pressure in the second tube and in the breast shield is rapidly removed. The control circuit board controls the first and second vacuum sources and the solenoid relief valve. 1. A milk expressing device capable of simulating a baby's suckling , comprising: a first vacuum source , a second vacuum source , a throttle hole , a solenoid relief valve , a first tube , a second tube , a breast shield , and a control circuit board , the first vacuum source being connected to the breast shield via the first tube , the throttle hole being provided on the first tube and configured for communicating with the atmosphere so that , when the first vacuum source is turned off , negative pressure in the first tube and in the breast shield disappears slowly through the throttle hole , the second vacuum source being connected to the breast shield via the second tube , the solenoid relief valve being provided on the second tube and configured for communicating with the atmosphere so that , when the solenoid relief valve is activated , negative pressure in the second tube and in the breast shield can be rapidly removed , the control circuit board being connected to and configured for controlling the first vacuum source , the second vacuum source , and the solenoid relief valve.2. The ...
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