초록 ▼

This invention relates to a coupling connector attachable to and detachable from a respirator mask. The connector comprises a chamber which is arranged to be in communication with the mask in the attached position, a tube for connection to a source of pressurized breathing gas, a valve to admit or i

This invention relates to a coupling connector attachable to and detachable from a respirator mask. The connector comprises a chamber which is arranged to be in communication with the mask in the attached position, a tube for connection to a source of pressurized breathing gas, a valve to admit or interrupt the gas flow, a pressure gauge device sensing the relative pressure prevailing within the chamber, and means of positively interlinking the said valve with the pressure gauge device. According to the invention the connector has a feeler which is released or inserted depending on whether it is attached to the mask or not, said feeler being associated with the interlinkage means via means modifying the mode of operation, which are arranged to establish an operational mode under negative pressure or overpressure automatically depending on whether the feeler is free or inserted. The connector is intended for respirator devices shut off in the open circuit condition.

대표청구항 ▼

In a coupling connector attachable to and detachable from the snout of a respirator mask comprising a housing enclosing a body defining a control chamber having first and second ends, said housing having outlet means adapted to be connected to said snout and be in communication with the mask when in

In a coupling connector attachable to and detachable from the snout of a respirator mask comprising a housing enclosing a body defining a control chamber having first and second ends, said housing having outlet means adapted to be connected to said snout and be in communication with the mask when in said connected position, said first end of said chamber being in communication with said outlet means, tube means connected to said housing for connection of a source of pressurized breathing gas, a control valve means in said housing to admit or shut off a main flow of gas under pressure from said tube means to said outlet means, biasing means applying a predetermined biasing force on said control valve means to maintain said control valve means in a closed position, said control valve means further comprising a pressure-sensing control diaphragm delimiting the control chamber at the second end thereof, an interlinkage chamber delimited at one side and separated from said control chamber by said pressure-sensing control diaphragm, an interlinkage jet leading into said interlinkage chamber, a return spring mounted between said first end of said control chamber and said pressure-sensing control diaphragm for pushing said control diaphragm towards the interlinkage jet; the improvement in which said control valve means includes a complementary spring, mounted within said control chamber, in series with the return spring, bearing means, against which said complementary spring bears, disposed at said first end of said control chamber, a movable cursor placed in between the return spring and the complementary spring, aperture means in said body and extending longitudinally along opposite sides of said body adjacent said movable cursor, said cursor extending exteriorly from opposite sides of said body through said aperture means, a shoulder formed on the exterior of said body, a lever bearing against said shoulder, said lever having at one end a fork engaging opposite ends of said movable cursor and having an opposite end, a feeler member which is constrained outside said body and inside said housing in a first position when said mask is connected to said snout to engage said opposite end of said lever to apply a force against the complementary spring thereby deactivating the complementary spring when said outlet is connected to said snout and freely movable to a second position when said mask is disconnected from said snout whereby both springs are then stressed which causes said pressure sensing diaphragm to close said interlinkage jet as long as said pressure-sensing control diaphragm senses a pressure equal to or greater than said ambient pressure when said outlet is disconnected from said snout.