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All purpose dental syringe

  • US 4,472,141 A
  • Filed: 10/26/1981
  • Issued: 09/18/1984
  • Est. Priority Date: 10/26/1981
  • Status: Expired due to Fees
First Claim
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1. An all purpose dental delivery syringe comprising a handle means and an associated trigger, a barrel mount connected to said handle means, a plunger shaft adapted to extend through said barrel mount, a drive means for effecting the displacement of said plunger shaft in at least one direction, said drive means comprising a series of ratchet teeth spaced along said plunger shaft, a driving pawl connected to said trigger for engaging said ratchet teeth and advancing said plunger shaft as said trigger is actuated, a holding pawl connected to said handle means, said holding pawl being normally biased against said plunger shaft for preventing backlash, a plurality of interchangeable barrel assemblies, each of said barrel assemblies being adapted to dispense a diffent dental material, e.g. composite resins, cements, impression material, root canal material, anesthesia, light activated materials, each said barrel assembly including a different barrel and a complementary disposable dispensing nozzle detachably connected to a respective barrel, each of said barrels being interchangeably connected to said barrel mount, and a plurality of interchangeable plunger tips, each of said tips being detachably connected to said plunger shaft for complementing the particular barrel connected to said barrel mount, and means associated with said trigger for adjusting the incremental displacement of said plunger shaft and associated plunger tip as said trigger is actuated.

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