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Class Information
Number: 604/222
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 > Seal ring mounted on piston
Description: Subject matter wherein the piston has a sealing means, usually deformable, circumferentially mounted thereon for engagement with the inside surface of the material container to prevent material leakage when the piston is moved therethrough.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7604618 |
High pressure injection syringe |
Oct. 20, 2009 |
| 7320680 |
Single-use syringe |
Jan. 22, 2008 |
| 7195609 |
Piston stopper for injection device, product container and injection device |
Mar. 27, 2007 |
| 7166089 |
Plunger of a syringe |
Jan. 23, 2007 |
| 6960195 |
Metering receptacle |
Nov. 1, 2005 |
| 6942638 |
Needleless injector and ampule system |
Sep. 13, 2005 |
| 6790197 |
Single use syringe and plunger rod locking device therefor |
Sep. 14, 2004 |
| 6764469 |
Color-coded medical dosing container |
Jul. 20, 2004 |
| 6761707 |
Safety syringe having needle holder capable of fixing secured and easy to drawback |
Jul. 13, 2004 |
| 6758828 |
Catheter for cell delivery in tissue |
Jul. 6, 2004 |
| 6746430 |
Low silicone plastic prefillable syringe |
Jun. 8, 2004 |
| 6641587 |
Systems and methods for treating vertebral bodies |
Nov. 4, 2003 |
| 6413236 |
Automatically retractable needle safety syringe |
Jul. 2, 2002 |
| 6224577 |
Syringes and plungers for use therein |
May. 1, 2001 |
| 6139530 |
Liquid medicine injection apparatus utilizing negative pressure |
Oct. 31, 2000 |
| 6132400 |
Dual-chamber syringe and methods |
Oct. 17, 2000 |
| 6017325 |
Disposable syringe with automatically retractable hypodermic needle |
Jan. 25, 2000 |
| 6004300 |
Composite hypodermic syringe piston |
Dec. 21, 1999 |
| 5865803 |
Syringe device having a vented piston |
Feb. 2, 1999 |
| 5795337 |
Syringe assembly and syringe stopper |
Aug. 18, 1998 |
| 5756726 |
Methods of producing singlet oxygen using compounds having improved functionalization |
May. 26, 1998 |
| 5735825 |
Syringe plunger tip |
Apr. 7, 1998 |
| 5658258 |
One piece disposable applicator |
Aug. 19, 1997 |
| 5620423 |
Syringe for the controlled discharge of viscous materials |
Apr. 15, 1997 |
| 5458576 |
Safety syringe with retracting needle |
Oct. 17, 1995 |
| 5437166 |
Ear piercing studs |
Aug. 1, 1995 |
| 5356393 |
Plural diameter syringe |
Oct. 18, 1994 |
| 5275582 |
Disposable syringe |
Jan. 4, 1994 |
| 5236420 |
Bypass, pressurizing piston for chambers |
Aug. 17, 1993 |
| 5215533 |
Safety syringe incorporating vacuum retraction of the needle |
Jun. 1, 1993 |
| 5190523 |
Disposable syringe and injector |
Mar. 2, 1993 |
| 5090961 |
Single use syringe |
Feb. 25, 1992 |
| 5061252 |
Syringe assembly |
Oct. 29, 1991 |
| 4863072 |
Single hand operable dental composite package |
Sep. 5, 1989 |
| 4813937 |
Ambulatory disposable infusion delivery system |
Mar. 21, 1989 |
| 4704105 |
Disposable plastic syringe for medical use and plastic barrel, especially for disposable syringes |
Nov. 3, 1987 |
| 4633765 |
Piston for precision dosing instrument |
Jan. 6, 1987 |
| 4632672 |
Self venting syringe plunger |
Dec. 30, 1986 |
| 4552155 |
Diagnostic specimen collector |
Nov. 12, 1985 |
| 4515591 |
Disposable syringe cartridge for fluid delivery apparatus |
May. 7, 1985 |
| 4501192 |
Piston for precision dosing instrument |
Feb. 26, 1985 |
| 4405249 |
Dispensing apparatus and method |
Sep. 20, 1983 |
| 4363329 |
Syringe having a reverse-taper barrel |
Dec. 14, 1982 |
| 4359050 |
Drench gun |
Nov. 16, 1982 |
| 4354507 |
Syringe |
Oct. 19, 1982 |
| 4340067 |
Blood collection syringe |
Jul. 20, 1982 |
| 4326540 |
Syringe device with means for selectively isolating a blood sample after removal of contaminates |
Apr. 27, 1982 |
| 4320770 |
Diagnostic specimen collector |
Mar. 23, 1982 |
| 4303070 |
Syringe |
Dec. 1, 1981 |
| 4266557 |
Low friction syringe |
May. 12, 1981 |
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