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SYRINGE

  • US 20140031763A1
  • Filed: 09/30/2013
  • Published: 01/30/2014
  • Est. Priority Date: 03/29/2011
  • Status: Active Grant
First Claim
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1. A syringe comprising:

  • an outer cylinder possessing a distal end and a flowing port at the distal end of the outer cylinder through which liquid flows, the outer cylinder possessing an open proximal end and an inner surface surrounding an interior of the outer cylinder, the interior of the outer cylinder communicating with the flowing port, the outer cylinder possessing an outer surface;

    a gasket positioned in the interior of the outer cylinder in liquid-tight contact with the inner surface of the outer cylinder and movable in a distal direction along the interior of the outer cylinder to discharge the liquid, which was previously introduced into the interior of the outer cylinder, through the flowing port;

    a rod connected to the gasket so that the rod and the gasket move together as a unit, the rod extending through the open proximal end of the outer cylinder, the rod including a plurality of teeth arranged in spaced apart relation along the rod;

    a mounting portion surrounding a proximal end portion of the outer cylinder and possessing an inner surface facing the outer surface of the outer cylinder, a hook fixed to the mounting portion and extending inwardly;

    the hook engaging one of the teeth on the rod in a locking position of the hook to prevent the rod from moving in the proximal direction relative to the outer cylinder;

    an operating portion fixed to the mounting portion and operable by a user pressing the operating portion to move the hook from the locking position in which the hook engages one of the teeth to an unlocking position in which the hook is moved out of engagement with the teeth to permit the rod to move in the proximal direction, the hook automatically returning to the locking position when the operating portion is no longer pressed by the user.

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