Fluid dispenser method and apparatus
AssigneeEthyl Products Company
InventorJames E. Burke
Life of this patent
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Abstract
A two-piece nozzle, for fitment to hand actuated liquid pumps having a barrel portion and a bore therethrough for passage of liquid, is disclosed. The nozzle has an integrally formed nozzle cap which is mounted to the end portion of the barrel. Enclosed within the nozzle cap is an integrally formed sealing structure which is attached to the barrel of the pump. The sealing device provides a peripheral liquid-tight seal around the barrel between the nozzle cap and the barrel. It also provides a check valve which is movably positioned at the mouth of the bore to provide a liquid-tight bore seal. The check valve is biased to provide the liquid-tight bore seal which bias can be overcome by liquid pressure in the bore developed upon actuation of the pump.
Claims16
A nozzle for fitment to a hand actuated liquid pump having a barrel portion with a bore therethrough for passage of liquid, said nozzle comprising:
- a. an integrally formed nozzle cap which includes
- i. an end wall having an aperture through which liquid from said bore is dispensed, and
- ii. a skirt portion having mounting means for mounting said nozzle cap around the end portion of said barrel;
- and
- b. an integrally formed thermoplastic sealing means attached to said barrel and enclosed by said nozzle cap, said sealing means having
- i. a peripheral seal portion to provide a liquid-tight seal around said barrel between said nozzle cap and said barrel, and
- ii. a check valve portion movably positioned at the mouth of said bore, said check valve portion including a seal member which selectively forms a liquid-tight bore seal with said mouth of said bore to close off the flow of liquid therethrough, and a spring member having a plurality of resilient arcuate segments which are connected to said seal member at one of their ends and to the remainder of said check valve portion at the other of their ends, and said spring member being in operative relationship with said seal member whereby said spring member biases said seal member to form its said liquid-tight bore seal, but said spring member having a biasing strength sufficiently low to allow liquid pressure in said bore, developed by actuation of said pump, to move said seal member away from said bore so that said liquid-tight bore seal is opened and liquid in said bore can pass to said aperture in said nozzle cap.
Dependencies are inferred from the claim text.