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Manual liquid dispensing device
| Details |
Inventors: Saito, Tadao; Tazaki, Takaharu;
Assignee: Yoshino Kogyosho Co., Ltd. (Tokyo, JP)
Primary Examiner: Rolla; Joseph J.
Assistant Examiner: Handren; Frederick R.
Attorney, Agent or Firm: Parkhurst & Oliff
This invention relates to a manual liquid dispensing device for spraying liquid by squeezing the trigger thereof. An adapter is inserted into a cylinder bore forming a pressurizing chamber. A piston is slidably mounted within the adapter. This adapter has an inlet communicating with the intake portion and an outlet communicating with an outlet passage to a nozzle hole formed at the bottom end thereof. A valve advantageously formed is attached to the end of the adapter to open only the inlet at pressure reducing time of the pressurizing chamber and to open only the outlet at pressurizing time. This valve is made of elastic material as a single unit. |
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DETAILED DESCRIPTION What is claimed is: 1.
A manually operated liquid dispensing device having a body, a cylindrical bore formed in said body and having an inlet and an outlet, a nozzle having a nozzle hole and coupled for communication with the outlet of said cylindrical bore, a piston slidably mounted within said cylindrical bore, and a trigger coupled to said portion for slidably moving said piston to produce a pumping action for spraying liquid from said nozzle hole, and further comprising: a hollow adapter member having an inlet and an outlet and positioned within said cylindrical bore so that the inlet and outlet of said adapter member may communicate with said inlet and outlet, respectively, of said cylindrical bore; and an elastic valve telescoped over one end of said adapter, said valve including a first portion forming a valve body, a second portion integrally coupled to and extending from said valve body, and a third portion integrally coupled to and extending from said valve body, said valve being positioned within said cylindrical bore and said second portion being constructed and arranged to allow the passage of a liquid from the inlet of the cylindrical bore through the inlet of the adapter to within said adapter in response to movement of said piston in a first direction and to prevent liquid flow through said adapter member inlet and the inlet of said cylindrical bore in response to movement of said piston in a second direction, said third portion being constructed and arranged to permit a flow of liquid through the outlet of said adapter and the outlet of said cylindrical bore to provide liquid to said nozzle and said nozzle hole in response to piston movement in said second direction and preventing liquid flow through said adapter member outlet and the outlet of said cylindrical bore in response to piston movement in said first direction.
2.
The liquid dispensing device of claim 1 wherein said first portion has a trapezoidal cross-section, said second portion is a thin annular portion integral with and projecting away from said body portion, and said third portion is a semispherical portion coupled to said first portion by a radial coupler
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Gutter-related 
