Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Conically walled syringe providing a progressively tighter piston fit










Image Number 3 for United States Patent #3955719.

A syringe, such as used in dentistry to inject dental products, e.g. injection masses as so-called composites, cements, medicated pastes and the like into cavities. The syringe comprises a hollow cylinder, a piston axially movable in the cylinder, and a reservoir for the product to be injected. The piston fits into the reservoir which has at its front end a nozzle projecting out of the cylinder and at its back end an opening to receive the piston. At its front end the cylinder has a reduced inside diameter, so as to provide an abutment for the reservoir. The piston is removable from the cylinder so as to permit insertion of the piston into the back end of the reservoir, whereupon the piston with the reservoir attached to it can be inserted into the back end of the cylinder. Pressure on the piston forces the piston into the reservoir, so as to press the injection mass out of the nozzle of the reservoir. The use of a transparent material for the cylinder and the reservoir permits easy observation of the contents of the reservoir.








 
 
  Recently Added Patents
Systems and methods for providing live voicemail to a mobile handset
Energy drink package
System and method for wireless messaging in a wireless communication system
Hot-press cushion material and manufacturing method of the same
Multi-level integrated circuit, device and method for modeling multi-level integrated circuits
AIN buffer N-polar GaN HEMT profile
Avirulent oncolytic herpes simplex virus strains engineered to counter the innate host response
  Randomly Featured Patents
System and method for providing learning material
Semiconductor memory structure for improved charge storage
Jointing element
Solar heat system
Engine speed sensing device
Digital signal processing apparatus
Charge pump
Drug delivery device having improved adhesion and attachment system for drug delivery device
Method and test kit for pretreatment of object surfaces
Combination wood and metal truss structure