VINCENT, Christopher,TWEEDIE, Robert,JONES, Jason,WRONSKI, Robert,DARLING, Philip,WAUGH, Edward
申请号：
PH12019500646
公开号：
PH12019500646A1
申请日:
2019.03.25
申请国别(地区):
PH
年份:
2019
代理人:
摘要：
A pump assembly for a dental cleaning appliance includes a fluid chamber, a piston, and a drive. Magnets, connected respectively to the piston and the drive, enable the drive to couple to the piston and move it within the fluid chamber to draw fluid into the fluid chamber. A stop prevents the piston from being pulled beyond a stop position so that through continued actuation of the drive the magnets separate to allow a spring to push the piston away from the stop position to urge a burst of fluid from the fluid chamber.
