Reduced-height precompression pump

Details Reduced-height precompression pump Reduced-height precompression pump

2002-11-25

2010-06-15

Shaver, Kevin P (Department: 3754)

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

C222S321900

Reexamination Certificate

active

07735693

ABSTRACT:
Low height precompression pump. The pump includes: a cylinder (1) consisting of a pump chamber (3), and an inlet valve (5), a piston (7) with a lower outwardly flaring lip seal (9) and an inwardly flaring lip seal (19), which rims a central aperture (17) of the piston (7), a hollow pump plunger rod (21), which is in sliding engagement with the central aperture (17), and which has a passage for communication (23) between the pump chamber (3) and the exterior, a securement device (37), with an upper retention cover (39), which attaches the cylinder (1) to a container, a first elastic member (31) housed in the cylinder (1) and a second elastic member (47), which has an upper bearing point (49) applied directly on the plunger rod (21), and which is above the upper retention cover (39).

REFERENCES:
patent: 4278189 (1981-07-01), Kirk, Jr.
patent: 5375745 (1994-12-01), Ritsche
patent: 5850948 (1998-12-01), Garcia et al.
patent: 6036059 (2000-03-01), VanBrocklin
patent: 6220483 (2001-04-01), van der Heijden
patent: 6286726 (2001-09-01), Marelli
patent: 6332561 (2001-12-01), Garcia et al.
patent: 2001/0022309 (2001-09-01), Garcia et al.
patent: 2002-273278 (2002-09-01), None
patent: 2002-273279 (2002-09-01), None

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