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Browse by Category: Main > Health & Medicine
Class Information
Number: 604/224
Name: Surgery > Means for introducing or removing material from body for therapeutic purposes (e.g., medicating, irrigating, aspirating, etc.) > Treating material introduced into or removed from body orifice, or inserted or removed subcutaneously other than by diffusing through skin > Material introduced or removed through conduit, holder, or implantable reservoir inserted in body > Means moved by person to inject or remove fluent material to or from body inserted conduit, holder, or reservoir > Injector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) > With piston or plunger for expelling material from body or injector reservoir > Piston moved by screw or rack
Description: Subject matter wherein movement of the piston is effected by means of a threaded mechanism or a rack and pinion type mechanism.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
4863072 Single hand operable dental composite package Sep. 5, 1989
4852768 Dosing syringe Aug. 1, 1989
4846785 Instrument for artificial insemination, embryo transfer or sampling follicular liquids in mammals Jul. 11, 1989
4826483 Non-reusable syringe May. 2, 1989
4820287 Syringe for high pressure injection of fluid or paste products Apr. 11, 1989
4813870 Dispenser for viscous liquids Mar. 21, 1989
4810249 Linear and Vernier-type syringe Mar. 7, 1989
4805810 Dosating dispenser for topical formulations Feb. 21, 1989
4779770 Metering dispenser Oct. 25, 1988
4749109 Volumetric pump with replaceable reservoir assembly Jun. 7, 1988
4744494 Ram gun May. 17, 1988
4743230 Inflating and deflating device for balloon dilatation catheters May. 10, 1988
4732302 Device for the metered discharge of dental material Mar. 22, 1988
4710172 High pressure syringe with pressure indicator Dec. 1, 1987
4673396 Syringe cartridge Jun. 16, 1987
4659327 Multiple dosage syringe Apr. 21, 1987
4648872 Volumetric pump with replaceable reservoir assembly Mar. 10, 1987
4634431 Syringe injector Jan. 6, 1987
4592745 Dispenser Jun. 3, 1986
4580577 Method and apparatus for collecting saliva Apr. 8, 1986
4568335 Device for the controlled infusion of medications Feb. 4, 1986
4560352 Dispenser for metering dental compositions Dec. 24, 1985
4546767 Cement injection device Oct. 15, 1985
4498904 Dose metering plunger devices for use with syringes Feb. 12, 1985
4493704 Portable fluid infusion apparatus Jan. 15, 1985
4479781 Dispenser for metering dental compositions Oct. 30, 1984
4479445 Adjustable embroidering tool Oct. 30, 1984
4465478 Syringe force amplification device Aug. 14, 1984
4449645 Dental container and amalgam dispensing method May. 22, 1984
4444560 Dental instrument-PDL syringe Apr. 24, 1984
4418702 Method and apparatus for collecting saliva Dec. 6, 1983
4367739 Syringe Jan. 11, 1983
4364388 Syringe dispensing apparatus Dec. 21, 1982
4346708 Syringe Aug. 31, 1982
4312343 Syringe Jan. 26, 1982
4265618 Electrically heated endodontic syringe for injecting thermoplastic material into a root canal cavity May. 5, 1981
4237871 Devices for injecting pastes or fluids into the human body Dec. 9, 1980
4231368 Device for intramuscular injections, especially of insulin Nov. 4, 1980
4212297 Micro-fluid exchange coupling apparatus Jul. 15, 1980
4189065 Metering dispenser for high-viscosity compositions Feb. 19, 1980
4184490 Precision endodontic syringe Jan. 22, 1980
4155490 Fluid dispenser May. 22, 1979
4121587 Root canal delivery syringe Oct. 24, 1978
4005699 Methods and apparatus for use in magnetic treatment of the body Feb. 1, 1977
3993064 One-handed syringe Nov. 23, 1976
3977574 Dispensing pipette actuator system Aug. 31, 1976

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