| 摘要 |
<p>A pressure regulator suitable for an aerosol dispenser package having a compressed non-liquified gas propellant comprising a chamber (22) forming a successive pair of first and second compartments (23,24) with the first compartment (23) having an inlet opening (26,27) and the second compartment (24) partly defining a restricted passageway (47) leading to an outlet opening (25), a diaphragm (41) closing the first compartment remotely from the second compartment, a spring (60) operable to urge the diaphragm to move into the second compartment towards the outlet, and a piston (44) connected for movement with the diaphragm and located in the second compartment to define the restricted passageway, the second compartment and piston cooperating progressively to increase the effective size of the passageway as the diaphragm moves towards the outlet. Preferably a probe (45) is moved with or by the piston to close the chamber outlet when the diaphragm is subject only to action by the spring. Preferably also the regulator has an associated valve (70) with a chamber (71) having a convergently tapered outlet (74) communicated with the regulator inlet, a ball (77) captively housed in the valve chamber for movement into substantially sealed engagement in tapered opening, and the valve chamber being formed by a pair of parts (72,73) connected for mutual telescopic sealed sliding movement about the ball.</p> |
