Spring-driven pump for dispensing discrete bursts of liquid

An oral care device (10) with a pump assembly (12) including: a plunger assembly (52) having 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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Garrigues, Jeffrey, Johanski, Brian, Miller, Kevin Arnold, Benning, Wolter F
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS BLASTING DENTISTRY HEATING HUMAN NECESSITIES HYGIENE LIGHTING MECHANICAL ENGINEERING MEDICAL OR VETERINARY SCIENCE NOZZLES PERFORMING OPERATIONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	An oral care device (10) with a pump assembly (12) including: a plunger assembly (52) having 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 includes a plurality of rack teeth (74 a . . . 74 g) and the pinion assembly (76) includes a plurality of teeth (78) arranged around a portion of the pinion; where the plurality of rack teeth include an angled front surface (86) and an angled rear surface (87), the front surface of at least some of the plurality of rack teeth including a different angle than the rear surface, and further where at least some of the plurality of rack teeth include a pointed or rounded tip (82).