VINCENT, CHRISTOPHER GRAHAM,TWEEDIE, ROBERT LAWRENCE,JONES, JASON GODFREY,WRONSKI, ROBERT STEFAN,DARLING, PHILIP STEPHEN,WAUGH, EDWARD MICHAEL
申请号：
CA3038394
公开号：
CA3038394A1
申请日:
2017.08.29
申请国别(地区):
CA
年份:
2018
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.
