| 摘要 |
PCT No. PCT/FR94/00035 Sec. 371 Date Sep. 13, 1995 Sec. 102(e) Date Sep. 13, 1995 PCT Filed Jan. 12, 1994 PCT Pub. No. WO94/15716 PCT Pub. Date Jul. 21, 1994A device for projecting measured quantities of a fluid substance by a puff of compressed air, said device comprising: a body (1) having an ejection channel (4); an actuator member (2) displaceable relative to the body (1) between a rest position and an actuated position; a resilient return member (19) urging the actuator member (2) towards its rest position; a supply (3) of said substance; a feed (5, 6) adapted to move a measured quantity of said substance from the supply (3) into the ejection channel (4); and an air pump (7) comprising a pump chamber (8) having an inlet valve (10, 11) in communication with the atmosphere; the device being characterized in that the outlet valve is constituted by a valve piston (12) constrained to be displaced with the actuator member (2) and sliding in sealed manner in a valve cylinder (13) having a top end (13a), said cylinder having a lateral outlet orifice (14) which communicates with the ejection channel (4), said valve cylinder having its top end (13a) in communication with the pump chamber (8), said lateral outlet orifice being positioned sufficiently far from said top end (13a) of the valve cylinder for the valve piston (12) to isolate the lateral outlet orifice (14) from the pump chamber so long as the actuator member (2) is not in the immediate vicinity of its actuated position.
|
