Fluid dispensing device
AssigneeThe AFA Corporation
InventorsWilliam S. Blake, Walter H. Wesner
Life of this patent
Estimating the term…
Abstract
A manually operated fluid dispensing device includes a first body component formed with a pump chamber and an upwardly opening cavity providing a valve housing that is closed by a second mating body component or cover having a projection that extends into the valve housing. A flat pliable valve element is clamped between said body components, said element being imperforate except for an opening through which said projection extends. A compressible bellows is associated with the pump chamber to form a variable volume pump chamber. The parts are all fabricated of thermoplastic materials and molding resins, the mating body components each being molded as a simple member of rigid plastic and including all passageways, grooves and ring seals required in the device.
Claims21
A valve housing for a fluid dispensing device including,
- a body component having wall means defining the sidewall and lower surface of a cavity, said sidewall including means forming an outlet passageway connecting said cavity and an outlet nozzle, and said lower surface including means forming an inlet passageway connecting said cavity to a source of fluid product to be dispensed, a pump chamber passageway connecting said cavity to a pump chamber, and a passageway intersecting said pump chamber passageway and extending substantially from said inlet passageway to said sidewall adjacent said outlet passageway,
- a cover for said cavity, said cover having interior surface means cooperating with said cavity lower surface to separate said inlet passageway from said outlet passageway and including depending wall means extending into said pump chamber passageway and defining a passageway therethrough connecting said pump chamber passageway to said inlet passageway, and
- a pliable valve element clamped between said cover and said cavity lower surface, said valve element being imperforate except for an opening through which said depending wall means extend and having an inlet portion and an outlet portion each of which portions seals against an individually associated portion of said cavity lower surface to close said inlet passageway and said outlet passageway, respectively.
A fluid dispensing device including,
- a body component having wall means defining the sidewall and lower surface of a cavity, said sidewall including means forming an outlet passageway connecting said cavity and an outlet nozzle, and said lower surface including means forming an inlet passageway connecting said cavity to a source of fluid product to be dispensed, a pump chamber passageway connecting said cavity to a pump chamber, and a passageway intersecting said pump chamber passageway and extending substantially from said inlet passageway to said sidewall adjacent said outlet passageway,
- a cover for said cavity, said cover having an interior surface cooperating with said cavity lower surface to separate said inlet passageway from said outlet passageway and including depending wall means extending into said pump chamber passageway, said depending wall means defining a passageway therethrough connecting said pump chamber passageway to said inlet passageway, and
- a pliable valve element clamped between said cover and cavity cooperating surfaces, said valve element being imperforate except for an opening through which said depending wall means extend, said valve element having an inlet portion sealing against said cavity lower surface to close said inlet passageway and an outlet portion sealing against said cavity lower surface to close said outlet passageway, said inlet portion permitting flow into said pump chamber passageway through said inlet passageway but preventing flow out of said pump chamber passageway, and said outlet portion permitting flow out of said pump chamber passageway and preventing flow into said pump chamber passageway.
Dependencies are inferred from the claim text.