| 摘要 |
A manually-operated pump dispenser for dispensing liquids from a container. Many of the prior art device have numerous parts, are complicated to manufacture, tend to leak, and are not easily produced by an efficient injection molding process. The present invention overcomes the deficiencies of the prior art by providing a pump dispenser that has a limited number of parts, is sample to construct and operate, resists leakage and is easily produced by injection molding of its parts. A manually-operated pump dispenser (10) comprises a housing (20), a closure (22) for coupling the housing to a container (28), a pump member (14) having a trigger (84) rigidly extending therefrom and being slidably received in the housing, a coiled spring (16) for biasing the pump member away from the housing, and an adjustable nozzle (12) coupled to the end of the pump member. The pump member and the housing include cooperating slots (86, 89, 90) and flanges (120, 121) and cooperating square portions (71, 115) for resisting the tendency of the pump member to distort about an axis transverse to the housing upon engagement of the trigger (84), thereby maintaining the pump member and the housing in longitudinal alignment. The dispenser includes an inboard valve member (18) received in the housing and an outboard valve (26) formed by the adjustable nozzle (12) and the pump member (14). The adjustable nozzle (12), pump member (14), inboard valve member (18), housing (20) and closure (22) are each integrally molded as one-piece. The closure (22) is snap-fitted direcly onto the housing (20). |
