IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0343723
(2001-09-21)
|
국제출원번호 |
PCT/US01/29627
(2003-01-31)
|
§371/§102 date |
20030131
(20030131)
|
국제공개번호 |
WO02/24548
(2002-03-28)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
An apparatus and method for discharging vapocoolants in stream or mist form includes the use of selected fluoroelastomers for valve parts to regulate discharge. The fluoroelastomers provide long-term stability to the vapocoolants to enable superior shelf life without minimal loss or contamination of
An apparatus and method for discharging vapocoolants in stream or mist form includes the use of selected fluoroelastomers for valve parts to regulate discharge. The fluoroelastomers provide long-term stability to the vapocoolants to enable superior shelf life without minimal loss or contamination of the vapocoolant. In addition, a filter is provided to remove contaminants from vapocoolant prior to passage through the nozzle opening.
대표청구항
▼
1. An apparatus for discharge of vapocoolants in stream or mist form including a container of pressurized vapocoolant and a valve having at least one movable valve element operating with a sealing surface for regulating the vapocoolant discharge, said sealing surface comprising a fluoroelastomer sel
1. An apparatus for discharge of vapocoolants in stream or mist form including a container of pressurized vapocoolant and a valve having at least one movable valve element operating with a sealing surface for regulating the vapocoolant discharge, said sealing surface comprising a fluoroelastomer selected to have:a) a durometer change of 85±5, as measured by ASTM D2240; b) a permeability measured as product loss from the assembled can through the valve assembly by gas chromatography in the range of 1 to 1.2 g/year; c) chemical inertness in respect to ethyl chloride as characterized by gas chromatography characterization of impurities less than about 100 ppm; d) a dimensional stability that exhibits limited dimensional change equal to ±5%; e) a low solid residue in vapocoolant as characterized by an ethyl chloride USP non-volatile residue test of less than about 100 ppm. 2. An apparatus as in claim 1, wherein said fluoroelastomer a perfluoroelastomer.3. An apparatus as in claim 1, wherein said fluoroelastomer is a copolymer of tetrafluoroethylene and perfluoromethyl vinyl ether.4. An apparatus as in claim 1, wherein said apparatus includes a spring for biasing said valve element closed against said sealing surface with a valve actuation force in the range of from 5.5 lbs. to 8.0 lbs.5. An apparatus as in claim 4, wherein said sealing surface is provided by a gasket having a thickness in the range of from about 0.039 inch to about 0.048 inch.6. An apparatus as in claim 5, wherein said gasket has an annular shape and is mounted in said container with a central flow opening having a diameter in the range of from about 0.115″ to about 0.125″.7. An apparatus as in claim 3, further including a button actuator for operating said valve.8. An apparatus as in claim 7, wherein said button actuator includes a body portion formed of a first resin and a nozzle insert formed of a second resin, said nozzle insert including a tapered discharge bore extending to a nozzle opening.9. An apparatus as in claim 8, wherein said nozzle opening has a major dimension of less than 0.015″.10. An apparatus as in claim 8, wherein said first and second resins are different.11. An apparatus as in claim 8, wherein said nozzle insert is frictionally retained in a mounting bore in said body portion of said button actuator.12. An apparatus as in claim 1, wherein said container comprises a metal can having inside surfaces coated with at least one polymer resin selected from the group consisting of polyamide/polyimide and epoxy/phenolic, and a dip tube formed of polytetraethylene.13. A method for discharging vapocoolants in stream or mist form from a container of pressurized vapocoolant including a valve having at least one movable valve element cooperating with a sealing surface for regulating the vapocoolant discharge, said sealing surface comprising a fluoroelastomer selected to have:a) a durometer change of 85±5, as measured by ASTM D2240; b) a permeability measured as product loss from the assembled can through the valve assembly by gas chromatography in the range of 1 to 1.2 g/year; c) chemical inertness in respect to ethyl chloride as characterized by gas chromatography characterization of impurities less than about 100 ppm; d) a dimensional stability that exhibits limited dimensional change equal to ±5%; e) a low solid residue in vapocoolant as characterized by an ethyl chloride USP non-volatile residue test of less than about 100 ppm, and operating said valve to discharge said vapocoolant.14. A method as in claim 13, wherein said valve includes a button actuator operable to overcome a closing force applied to said movable valve element by a spring.15. A method as in claim 13, wherein said fluoroelastomer is perfluoroelastomer.16. A method as in claim 13, wherein said fluoroelastomer is a copolymer of tetrafluoroethylene and perfluoromethyl vinyl ether.17. A method as in claim 13, wherein said apparatus includes a spring for biasing said valve element closed against said sealing surface with a valve actuation in the range of from 5.5 lbs. to 8.0 lbs.18. An apparatus for discharge of vapocoolants 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 having at least one movable valve element operating with a sealing surface for regulating flow of vapocoolant through said passageway means, and a filter downstream of said valve and upstream of said nozzle opening for removing contaminants from vapocoolant conveyed through said passageway means.19. An apparatus as in claim 18, wherein said filter is sized to restrict the flow of contaminants having a particle size greater than about 50 microns.20. An apparatus as in claim 18, wherein said filter is a non-shedding paper filter, a sintered metal filter or a polymeric membrane.21. An apparatus as in claim 18, wherein said filter comprises a sintered metal filter having pores for screening said contaminants.22. An apparatus as in claim 21, wherein said filter pore size is 50±10 microns.23. An apparatus as in claim 18, wherein said sealing surface is formed of a fluoroelastomer and said nozzle opening is formed of metal.24. An apparatus as in claim 18, wherein said nozzle and filter comprise an assembly mounted to said container.25. An apparatus as in claim 18, wherein said nozzle opening has a diameter in the range of from about 0.004″ to about 0.015″.26. An apparatus as in claim 18, wherein said nozzle opening has a diameter in the range of from about 0.005″ to about 0.009″.27. An apparatus as in claim 18, wherein said container includes a vapor space above said vapocoolant that is maintained at a pressure of from about 4 psi to about 60 psi at room temperature.28. An apparatus as in claim 18, wherein said container includes a vapor space above said vapocoolant that is maintained at a pressure of from about 4 psi to about 8 psi at room temperature.29. An apparatus as in claim 18, further including an actuator carried by said container and arranged to actuate said valve, said passageway means including a passageway bore extending through said actuator to convey liquid vapocoolant to said nozzle, said filter being mounted in said actuator to remove contaminants in liquid vapocoolant being conveyed through said passageway bore to said nozzle opening.30. An apparatus as in claim 29, wherein said sealing surface is formed of a fluoroelastomer having:a) a durometer 85±5, as measured by ASTM D2240; b) a permeability measured as product loss from the assembled can through the valve assembly by gas chromatography in the range of 1 to 1.2 g/year; c) chemical inertness in respect to ethyl chloride as characterized by gas chromatography characterization of impurities less than about 100 ppm; d) a dimensional stability that exhibits limited dimensional change equal to ±5%; e) a low solid residue in vapocoolant as characterized by an ethyl chloride USP non-volatile residue test of less than about 100 ppm. 31. A method for discharging vapocoolants in stream or mist form from a container of pressurized liquid vapocoolant, conveying liquid vapocoolant from said supply thereof through said passageway means to a nozzle having a nozzle opening for emitting said vapocoolant in stream or mist form, controlling flow of vapocoolant from said supply thereof to said nozzle means with a valve having at least one movable valve element operating with a sealing surface for regulating flow of vapocoolant through said passageway means, filtering said vapocoolant being conveyed through said passageway means downstream of said valve and upstream of said nozzle opening to remove contaminants, and operating said valve to emit said vapocoolant from said nozzle opening in stream or mist form.32. A method as in claim 31, wherein said step of filtering said vapocoolant includes restricting the flow of contaminants having a particle size greater than about 50 microns.33. A method as in claim 31, wherein said filter is a non-shedding paper filter, a porous sintered metal or a polymeric membrane.34. A method as in claim 31, wherein said sealing surface is formed of a fluoroelastomer and said nozzle opening is formed of metal.35. A method as in claim 31, wherein said step of filtering said vapocoolant includes restricting the flow of contaminants having a particle size greater than about 0.0005″.36. A method as in claim 31, wherein said step of filtering said vapocoolant includes restricting the flow of contaminants having a particle size greater than about 0.010″.37. A method as in claim 31, wherein said step of filtering said vapocoolant includes restricting the flow of contaminants having an elongate particle size greater than about 0.0005″ by 0.010″.38. A method as in claim 31, wherein said step of filtering said vapocoolant includes restricting the flow of contaminants having a particle size greater than about 30 microns.39. An apparatus for discharge of vapocoolants 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 having at least one movable valve element operating with a sealing surface for regulating flow of vapocoolant through said passageway means, and a filter for removing contaminants from vapocoolant conveyed through said passageway means upstream of said nozzle opening, said filter being sized to restrict the flow of particles larger than manufacturing debris resulting from the manufacture of plastics.40. An apparatus as in claim 39, wherein said filter is sized to restrict the flow of contaminants having a particle size greater than about 0.0005″.41. An apparatus as in claim 39, wherein said filter is sized to restrict the flow of contaminants having a particle size greater than about 0.010″.42. A method as in claim 39, wherein said filter is sized to restrict the flow of contaminants having an elongate particle size greater than about 0.0005″ by 0.010″.43. An apparatus as in claim 39, wherein said filter is sized to restrict the step of filtering said vapocoolant includes restricting the flow of contaminants having a particle size greater than about 30 microns.44. An apparatus as in claim 39, further including a button actuator for operating said valve, said nozzle and said filter being mounted on said button actuator.45. An apparatus as in claim 44, wherein said nozzle and said filter comprise a subassembly mounted on said button actuator.46. An apparatus as in claim 45, wherein said nozzle and filter comprise engaged elements forming said subassembly.47. An apparatus as in claim 45, wherein said button actuator includes a cap mounted to said container, said passageway means including a passageway bore in said cap, and said nozzle and said filter comprise cylindrical shaped elements fitted together to form a subassembly mounted in said passageway bore in said cap.48. An apparatus as in claim 45, wherein said passageway means includes a passageway bore, said nozzle and said filter comprise a subassembly mounted in said passageway bore with said filter positioned upstream of said nozzle opening, said filter and said nozzle opening each having an area extending in a transverse direction across said passageway bore for passage of said vapocoolant, said filter area being substantially greater than said nozzle opening area.49. An apparatus as in claim 39, wherein said nozzle and filter comprise a subassembly mounted on said container.50. An apparatus as in claim 39, wherein said filter is located downstream of said valve and upstream of said nozzle opening.51. An apparatus as in claim 50, wherein said nozzle and said filter comprise a subassembly mounted on said container.52. An apparatus as in claim 49, wherein said nozzle and said filter comprises frictionally engaged elements forming said subassembly, said subassembly having a generally cylindrical shape and being mounted in said passageway means.53. An apparatus as in claim 50, wherein said passageway means includes a passageway bore, said nozzle and said filter comprise a subassembly frictionally mounted in said passageway bore with said filter positioned upstream of said nozzle opening, said filter and said nozzle opening each having an area extending in a transverse direction across said passageway bore for passage of said vapocoolant, said filter area being substantially greater than said nozzle opening area.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.