초록 ▼

A spray head (26) for use with a can (10) containing a liquid (11) exposed to the pressure of a propellant (12). The spray head being disposed on the free end of a dispensing tube (21) of a dispensing valve, especially an aerosol valve (15), and including a spray nozzle (27) in fluid communication (

A spray head (26) for use with a can (10) containing a liquid (11) exposed to the pressure of a propellant (12). The spray head being disposed on the free end of a dispensing tube (21) of a dispensing valve, especially an aerosol valve (15), and including a spray nozzle (27) in fluid communication (28) with the discharge duct (23) of the dispensing tube (21). The fluid communication (28) includes therein a throttle member (29) with a resiliently biased throttle body (30) which has one side exposed to ambient pressure while the overpressure prevailing in the can interior acts on the other side thereof and through which the flow cross-section (31) can be controlled in dependence on the overpressure in the can such that an approximately constant discharge rate per unit of time through the spray nozzle (27) is achieved until the can (10) is substantially emptied. The resilient bias of the throttle body (30) is inherent in the throttle member and is effective only during use of the device such that at maximum over-pressure in the can a minimum flow cross-section (31) is kept open.

대표청구항 ▼

A spray head for a can (10) containing a liquid medium (11) exposed to the pressure of a propellant (12), and said spray head being disposed at the free end of a dispensing tube (21) of a dispensing valve connected to the can, said dispensing tube having a discharge duct, aid spray head comprising a

A spray head for a can (10) containing a liquid medium (11) exposed to the pressure of a propellant (12), and said spray head being disposed at the free end of a dispensing tube (21) of a dispensing valve connected to the can, said dispensing tube having a discharge duct, aid spray head comprising a spray nozzle (27) having a passageway in fluid-communication with the discharge duct (23) of the dispensing tube (21), a throttle member (29) in said fluid-communication passageway (28) and including a resiliently biased throttle body (30) connected to said spray nozzle and formed as a single piece element including a resilient element which is exposed to ambient pressure on one side and to the overpressure prevailing in the can interior on the other side thereof during the discharge of the liquid medium, and throttle body including a member integrally connected to said resilient element and positioned in said passageway for controlling the flow cross-section (31) of said passageway in dependence on the overpressure in the can to establish an approximately constant liquid quantity per unit of time of discharge through the spray nozzle (27) until the can (10) has been substantially emptied, said resilient element constructed and arranged to establish resilient bias of the throttle body (30) effective substantially only upon use when the dispensing valve (15) is opened to establish a varying discharge opening, such that with the overpressure in the can at a maximum, a minimum flow cross-section (31) is established and with a minimum residual overpressure in the can (10) the flow-cross-section (31) is maximum.