초록 ▼

In a device for tapping gas from a gas-containing cartridge, there is provided a screw socket into which a threaded end of a tap forming part of a gas-using appliance is screwed, a piston spring-loaded in the direction of the end of the socket and bearing at its end sealing means engaging the cartri

In a device for tapping gas from a gas-containing cartridge, there is provided a screw socket into which a threaded end of a tap forming part of a gas-using appliance is screwed, a piston spring-loaded in the direction of the end of the socket and bearing at its end sealing means engaging the cartridge, a perforating needle mounted on the socket and extending through the piston, and stop means to limit the travel of the piston under the action of its spring. The piston is hollow and of larger diameter than the socket which latter extends into a bore in the piston, the piston sliding over and outside the socket. By this means, the risk of seizure of the piston in prolonged use of the device is considerably reduced.

대표청구항 ▼

A tapping device for use in a gas appliance for tapping gas from a puncturable and disposable gas cartridge, comprising: a body having an axially elongated outer surface, having an appliance receiving socket at one end and having an axial channel extending from the socket through the body; a perfora

A tapping device for use in a gas appliance for tapping gas from a puncturable and disposable gas cartridge, comprising: a body having an axially elongated outer surface, having an appliance receiving socket at one end and having an axial channel extending from the socket through the body; a perforating needle fixed to the body in alignment with the axial channel and extending beyond the other end of the body and operative to puncture a cartridge when the body is moved axially to drive the needle thereinto; a ring surrounding the body with a functional clearance enabling axial sliding of said ring over and outside said body; spring means operative between the ring and the body to resiliently urge the ring toward said other end of the body; and annular sealing means carried by the ring, the sealing means surrounding the perforating needle and being normally urged by the spring means beyond the needle, the sealing means being operative to seal against the cartridge under the pressure of the spring means when the perforating needle is driven into the cartridge.