WOLTER F. BENNING,JEFFREY GARRIGUES,BRIAN JOHANSKI,KEVIN ARNOLD MILLER
申请号：
US15571878
公开号：
US20180085189A1
申请日:
2016.04.27
申请国别(地区):
US
年份:
2018
代理人:
摘要：
An oral care device (10) with a pump assembly (12) comprising: a plunger assembly (52) comprising a rack assembly (74) a compressible spring (64) configured to exert a forward force on the plunger assembly and a rack and pinion assembly (72) configured to exert a force on the plunger assembly opposite the forward force, wherein the rack assembly comprises a plurality of rack teeth (74a . . . 74g) and the pinion assembly (76) comprises a plurality of teeth (78) arranged around a portion of the pinion wherein the plurality of rack teeth comprise an angled front surface (86) and an angled rear surface (87), the front surface of at least some of the plurality of rack teeth comprising a different angle than the rear surface, and further wherein at least some of the plurality of rack teeth comprise a pointed or rounded tip (82).
