Patent ID: 7127875
Filing Date: 2006-10-31
Classification: B65B

Abstract:
1. A portable vacuum device for extracting fluid in a container having an opening, comprising: a handheld housing having a vacuuming head; a fluid extracting nozzle extended towards said vacuuming head for communicating with said opening of said container, wherein said fluid extracting nozzle comprises a nozzle body having an enlarged vacuum chamber and a fluid inlet alignedly positioned at said vacuuming head of said handheld housing for communicating said vacuum chamber with an interior pressure of said container, a vacuum device supported in said handheld housing to generate a vacuum effect within said fluid extracting nozzle at said vacuuming head of said handheld housing for extracting said fluid in said container, wherein said vacuum device creates said vacuum effect within said vacuum chamber to generate a vacuum pressure therewithin for extracting said fluid in said container to said vacuum chamber; and a sensor switch, which is electrically connected to said vacuum device to sense said vacuum pressure at said fluid extracting nozzle, comprising a movable conductive member driven with respect to said vacuum pressure of said fluid extracting nozzle and a control member normally positioned spaced apart from said movable conductive member to allow said vacuum device to be operated, wherein when said vacuum pressure drops below a predetermined threshold pressure, said movable conductive member is driven to electrically contact with said control member to form an open circuit of said vacuum device so as to deactivate said vacuum device from generating said vacuum effect, wherein said sensor switch further comprises a sensor housing having a sealing chamber subject to said vacuum pressure and a pressure inlet which is communicating with said sealing chamber and subject to an atmospheric pressure as a reference pressure, wherein said movable conductive member is movably disposed in said sealing chamber in an air sealing manner such that when said vacuum pressure is less than said reference pressure, said movable conductive member is driven towards said control member until said movable conductive member contacts with said control member to deactivate said vacuum device, wherein said sensor switch further comprises a resilient element securely supported in said sealing chamber for normally applying an urging force against said movable conductive member to push said movable conductive member at a position that said movable conductive member is sealed at said pressure inlet when said vacuum pressure reaches said reference pressure such that said movable conductive member is normally spaced apart from said control member with respect to said reference pressure, wherein said sensor switch further comprises a sensor adjustor having a retaining seat rotatably mounted on said sensor housing, wherein an end portion of said resilient element is substantially mounted at said retaining seat such that said sensor adjustor is rotatably moved with respect to said sensor housing to selectively adjust said urging force of said resilient element against said movable conductive member so as to adjust a sensitivity of said movable conductive member of said sensor switch in response to said vacuum pressure, wherein said fluid extracting nozzle further has a sensor outlet and a pumping outlet spacedly formed on said nozzle body to communicate said vacuum chamber with said sealing chamber of said sensor switch and to communicate said vacuum chamber with vacuum device respectively, wherein said fluid extracting nozzle further comprises a flexible sensor tube sealingly extended from said sensor outlet to said sensor housing to communicate said vacuum chamber with said sealing chamber and a flexible pumping tube sealingly extended from said pumping outlet to said vacuum device to communicate said vacuum chamber with said vacuum device.