Universal improved particulate matter delivery device

Details Universal improved particulate matter delivery device Universal improved particulate matter delivery device

2006-09-05

2006-09-05

Rose, Robert A. (Department: 3723)

Abrading

Machine

Sandblast

C451S101000

Reexamination Certificate

active

07101265

ABSTRACT:
The present invention includes an apparatus for delivery of pressurized particulate matter against a surface or target to abrade, texture, sandblast, etch, erase, cut, penetrate, smooth, clean, polish, harden and/or deburr the surface or target. The invention is expected to be used in slightly different embodiments, both by dentists and oral hygienists to clean teeth, and by hobbyists, although numerous other uses are within the contemplation of the inventors. The dental embodiment features a prefilled, sealed, and disposable fluidizing chamber and cannula assembly that avoids contamination and which has been approved by the FDA for dental use. The general utility embodiment features a refillable fluidizing chamber and detachable cannula.Included is a fluidizing chamber having a discharge end of an inlet tube that is disposed below or overlaps the intake end of the outlet tube such that the discharge of the inlet tube blows the particulate matter into the fluid above the intake end of the outlet tube, thereby suspending it therein, without clogging. The invention further provides for a duckbill check valve to prevent backflow of particulate matter when the chamber is disconnected from the pressurized fluid source or there is a drop in pressure from said source. Included with the general utility embodiment are a refill aperture and removable refill aperture plug to facilitate recharging the fluidizing chamber with particulate matter using a filling cartridge.

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patent: 5839946 (1998-11-01), Hertz
patent: 6004191 (1999-12-01), Schur et al.

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