Manually actuated pump assembly

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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Details

F04B 9/14 (2006.01) B05B 11/00 (2006.01) B65D 83/76 (2006.01)

Patent

CA 2410998

A finger operated pump assembly comprising a pump body (60, 160) having a base (64, 164) supporting an outer housing (62, 162) and an inner housing (66, 166) and defining a first portion of a compression chamber (68) therebetween. A piston (82) has an annular lip and has a piston outlet defined by a poppet valve seat. A poppet (98) is accommodated by the inner housing (66, 166) and biased away from the base into engagement with the poppet valve seat by a spring (104). The poppet (98) and inner housing (66, 166) define an interior cavity (100). A peripheral passageway (74) communicates with the compression chamber (68) and includes a one-way valve (76). A ventilation port (110) is provided in the interior cavity (100) so that during operation of the poppet (98), it may operate at ambient pressure.

Un dispositif de pompe activé par un doigt comprend un corps de pompe (60, 160) pourvu d'une base (64, 164) soutenant un logement externe (62, 162) et un logement interne (66, 166) et définissant une première portion d'une chambre de compression (68) située entre lesdits logements. Un piston (82) a une lèvre annulaire et une sortie de piston définie par un support de clapet. Un champignon (98) est logé par le logement interne (66, 166) et est polarisé de la base pour rentrer en contact avec le support du clapet par le biais d'un ressort (104). Le champignon (98) et le logement interne (66, 166) définissent une cavité intérieure (100). Une voie de passage périphérique (74) communique avec la chambre de compression (68) et comprend une soupape à simple action (76). Un orifice de ventilation (110) se trouve dans la cavité intérieure (100), de telle manière que pendant le fonctionnement du champignon (98), il peut fonctionner à pression ambiante.

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