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Disposable fluid dispenser

  • US 4,116,571 A
  • Filed: 11/17/1976
  • Issued: 09/26/1978
  • Est. Priority Date: 04/27/1976
  • Status: Expired due to Term
First Claim
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1. A dispenser for viscous liquids for personal use comprising;

  • a hollow container having an opening at the forward end and means thereon to permit introduction of a supply of viscous liquid to the interior of the container, valve means adapted to be mounted on the container normally closing the opening in the container and adapted to be opened to release liquid, the valve means including a valve housing which is hollow and open at both ends, the housing adapted to be mounted in the opening in the container so that the passageway through the housing provides communication between the interior of the container and the exterior thereof, a valve seat formed in the housing, a valve piston movably mounted in the housing and shiftable between a position in engagement with the valve seat to close the opening at the forward end of the container and a position removed from the valve seat to permit the viscous liquid to flow from the container through the opening therein, spring means in the form of a plurality of substantially uniformly spaced stems extending rearwardly from the piston, spring retention means to engage with the stems and normally bias the spring stems to maintain the piston in engagement with the valve seat, and the piston in the seated position having an exposed portion extending beyond the housing whereby a predetermined application of force to the exposed portion will unseat the piston by applying a further bias to the spring stems and thereby permit the viscous liquid to flow from the container and, thereafter, release of the predetermined application of force will permit the piston to again seat and close the flow path from the container, and the spacing of the spring stems facilitating a uniform unseating of the piston and a consequent uniform flow of viscous liquid from the container.

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