Patent ID: 7658304
Filing Date: 2010-02-09
Classification: B05B,B65D

Abstract:
1. An apparatus for discharge of vapocoolant in stream or mist form including a container for holding a pressurized supply of liquid vapocoolant, passageway means for conveying liquid vapocoolant from said supply thereof to a nozzle having a nozzle opening for emitting said vapocoolant in stream or mist form, a valve for regulating flow of vapocoolant from said supply thereof through said passageway means to said nozzle, and a filter downstream of said valve and upstream of said nozzle opening for removing contaminants from vapocoolant conveyed to said nozzle, said passageway means extending to a nozzle mounting bore formed in said apparatus, said nozzle being a separate element from said apparatus and being mounted with an interference fit in said nozzle mounting bore, said nozzle including an open end, a side wall, a front wall and a nozzle bore, said nozzle bore extending from said open end to said front wall, said open end communicating with said passageway means for receiving vapocoolant, said side wall extending to form said front wall and provide said nozzle as a one-piece unitary element, said front wall closing said nozzle bore and having an opening extending through the front wall forming said nozzle opening, said filter being mounted in and transversely across said nozzle bore upstream of said nozzle opening, said nozzle and said filter comprising a two-piece assembly received in said nozzle mounting bore, said filter being tightly fitted in said nozzle bore in said nozzle and said nozzle side wall being engaged along substantially its entire extent by said nozzle mounting bore in said interference fit with said nozzle opening exposed for emitting vapocoolant, said nozzle bore having a uniform circular bore cross-sectional area for axial flow of said vapocoolant through substantially all of said bore cross-sectional area and said filter having a uniform circular filter cross-sectional area for axial flow of vapocoolant through substantially all of said filter cross-sectional area, and said nozzle bore cross-sectional area being substantially equal to and coextensive with said filter cross-sectional area.