GB1025245A - Aerosol device - Google Patents

Abstract

1,025,245. Delivering measured quantities of liquid. MERCK & CO. Aug. 19, 1963 [Aug. 31, 1962], No. 32756/63. Heading B8N. [Also in Divisions F1 and A5] An aerosol device for dispensing measured amounts of a substance comprises a manuallyactuated plunger 51, with a measuring chamber 77 therein, which is moved into the aerosol container 15 to allow the measuring chamber to fill through orifice 79 and is held in this position, Fig. 8, when the operating means 13 is released, by detent means 45, means being provided to release the detent means when dispensing of the measured amount is desired. The device is shown as an inhaling device for dispensing medicament into a mouth or nostril. The actuating means 13 is attached to a plunger 67, sealed by a diaphragm 73, which moves initially to drive any air out of the measuring chamber 77 before the plunger 51 is lifted into the container for filling of the measuring chamber. At the end of the upward movement of the member 13, a sleeve 87 is lifted to lock the detent balls 45 in position beneath inclined surfaces 59 on the plunger 51. When the means 13 is released the plunger 67 returns to its normal position to allow the measuring chamber 77 to fill and the surfaces 59 force the balls 45 outwardly to grip the lower end 95 of the sleeve 87 whereby the latter and the plunger 51 remain cocked with the chamber 77 retracted into the container 15. When suction is applied to the mouthpiece 17 sleeve 87 is forced down to release the balls 45 and allow plunger 51 to be moved down by the fluid pressure and by spring 81, whereby orifice 79 moves out of the container 15 past sealing diaphragm 31 and the contents of the measuring chamber 77 are discharged through passage 47 and spraying nozzle 109, Fig. 10 (not shown). As plunger 51 begins to move down, aperture 103 in sleeve 13 is opened to allow air to be inhaled with the medicament. In Fig. 11 (not shown), the detent balls are replaced by spring fingers 131 which are controlled by the suction actuated release sleeve 137. The container 15 is also adapted to receive a replaceable aerosol container 155 screwed therein and is provided with puncturing means 149. In Fig. 13, the plunger 251 is held cocked by a spring-loaded lever 284 which is released manually by button 296.