Dispensing – With discharge assistant – With material supply container and discharge assistant with...
Reexamination Certificate
2000-05-04
2001-09-11
Shaver, Kevin (Department: 3754)
Dispensing
With discharge assistant
With material supply container and discharge assistant with...
C239S333000
Reexamination Certificate
active
06286727
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a pump dispenser of the hand-powered type and comprising a container and a pump body mounted on the container. More specifically, this invention relates to such a pump dispenser in which the pump body has an overhang engaged by the dorsal web between the thumb and forefinger of the user's hand. Still more specifically, the invention relates to the method of making such a pump dispenser which may be molded in one piece.
BACKGROUND OF THE INVENTION
The prior art is replete with examples of hand-powered pump dispensers which comprise a pump body mounted on a container. The pump body includes a nozzle on the front end and an overhang on the rear end. The pump may include a vertically disposed cylinder having a piston operatively disposed within it such as shown, for example, in the McKinney U.S. Pat. No. 4,161,288 issued Jul. 17, 1979.
In a relatively recent development, the manufacture of such pump bodies in one piece has been disclosed in my patent application Ser. No. 09/176,752, filed Oct. 22, 1998, now U.S. Pat. No. 6,032,834 and assigned to the assignee of the present application. This disclosure describes molding the pump body from the bottom up whereby the lower mold part extends into the cavity of the upper mold part to structure the body parts as desired. Because the sloping rear end of the pump body and the top wall are uninterrupted surfaces, the pumps made under this disclosure appear conventional and unremarkable.
The present invention is based on the idea in a one-piece pump of providing the overhang with a comfortable ergonomic surface to be engaged by the dorsal web of the hand of the user in operation.
SUMMARY OF THE INVENTION
The present invention is a pump dispenser comprising a one-piece unitary molded pump body and housing, the housing defined by a pair of spaced side walls and a top wall and inclined rear wall connected to the side walls. A vertically disposed tubular support and pump cylinder is spaced inward from the side walls unitary with and meeting the top wall. The body and housing have a cavity under the inclined rear wall formed with a plurality of closely spaced trans-verse webs extending between and integral with the side walls. The webs have rounded lower edges extending downward at least to the level of the lower end of adjacent portions of the side walls to form an ergonomic surface without substantially affecting the side profile of the dispenser. The dispenser may additionally include an intersecting web in the recess parallel to and between the side walls and intercepting the transverse webs.
REFERENCES:
patent: 4161288 (1979-07-01), McKinney
patent: 4819835 (1989-04-01), Tasaki
patent: 4953791 (1990-09-01), Tada
patent: 5590834 (1997-01-01), Foster
patent: 5603434 (1997-02-01), von Schuckmann
patent: 5626259 (1997-05-01), Mass et al.
patent: 5656227 (1997-08-01), Foster
patent: 6032834 (2000-03-01), Keung
Nicolas Frederick C
Owens-Illinois Closure Inc.
Shaver Kevin
LandOfFree
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