A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
83/3
A61C 3/03 (2006.01)
Patent
CA 1165594
19320/19490-FF Abstract of the Disclosure An air-driven dental scaler (10) is disclosed having water transport means for delivering water to a scaling type work tool (26). The water transport means comprises a tube (103) coaxially disposed within a vibratable hollow shaft (38). The water tube is supported at one end within a resilient support assembly (110) which pro- vides a water seal between the coaxially disposed vibrat- able shaft (38) and water transport tube (103). The water seal assembly is positioned forwardly of a vibra- tional node characteristic of a standing wave created during operation of the dental scaler. An axial force exerted on the water seal assembly (110) during vibration of the vibratable shaft (38) improves the efficacy of the water seal between the shaft (38) and the water transport tube (103), The single, resilient support for the water transport tube provides for quick replacement of the water tube in the event of clogging of the tube by mineral deposits or sediment. The invention is also applicable to air- or fluid- driven vibratory devices having non-driving fluid trans- port means associated therewith.
345757
Johnson Douglas S. Q.c.
Syntex (u.s.a.) Llc.
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