All purpose dental syringe
First Claim
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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Accused Products
Abstract
An all purpose dental syringe and delivery system for dispensing various types of dental materials as may be required in the performance of various dental procedures e.g. the administering of anesthesia, making impressions, performing root canals, filling cavities, etc. that includes a power handle having a plunger which is incrementally advanced upon each actuation of the power handle and a plurality of interchangeable barrel assemblies. Each of the plurality of barrels assemblies includes an associated dispensing nozzle, each being operative to dispense a particular dental material according to a given procedure. Co-operatively associated with the plunger are interchangeable plunger tips for complementing a particular barrel assembly for dispensing a particular material therefrom, and each barrel and associated parts are color coded to facilitate the use and application of the syringe. The power handle also includes an adjustment whereby the amount or volume of the material dispensed can be varied within predetermined limits. In one embodiment an arrangement is provided to prohibit extrusion of the dental material which may occur due to any residual buildup of pressure thereon after an extruding operation.
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Citations
45 Claims
- 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.
- 4. A power handle for an all purpose dental syringe comprising a handle means including a pair of complementary handle sections, a barrel mount connected thereto, means for connecting said complementary handle sections together, a trigger pivotally mounted between said handle sections, a plunger means reciprocally mounted in said handle means, said plunger means including a plunger shaft, a pull knob connected to one end of said shaft, means on the other end of said shaft adapted for detachably receiving a plunger tip thereto, and a drive means for effecting the reciprocating movement of said plunger shaft in at least one direction, said drive means comprising a series of ratchet teeth formed on said plunger shaft longitudinally thereof, and a driving pawl connected to said trigger for engaging and advancing said plunger shaft each time said trigger is squeezed, a holding pawl pivotally connected between said handle sections, a resiliant means normally biasing said holding pawl against said plunger shaft for preventing backlash, and means for prohibiting the unintentional removal of said plunger means from said handle means, means for adjusting the displacement of said plunger shaft upon squeezing said trigger relative to said handle means, wherein said adjusting means includes an elongated slot formed in one handle section, a series of detents formed on said trigger adjacent said slot, and a detent pin slidably disposed in said slot for engaging with a corresponding detent of said trigger so as to limit the throw of said trigger and corresponding displacement of said plunger shaft.
- 42. A general purpose dental delivery system for facilitating the delivery of various types and kinds of dental materials as required in various dental procedures comprising a dental syringe having a power handle including a fixed hand held portion and a trigger pivotally mounted on said fixed handle portion, a plunger means reciprocally mounted in said power handle, a drive means operatively associated with said trigger for effecting incremental displacement of said plunger means as said trigger is actuated, a pivotally mounted holding means for prohibiting backlash of said plunger means as said trigger is actuated, a plurality of barrel assemblies, said barrel assemblies being interchangeably connected to said power handle, each of said barrel assemblies includes a barrel and a complementary dispensing nozzle detachably connected to its respective barrel for dispensing a particular dental material, and said plunger means including a plunger and a plurality of interchangeable plunger tips, each of said plunger tips complementing a particular barrel assembly, wherein each barrel assembly and complementary plunger tips are color coded so that said barrel assemblies and its complementary plunger tip are of like color.
Specification