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Class Information
Number: 604/219
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 > Diameter of piston selectively adjustable
Description: Subject matter including means for selectively varying the diameter of the piston.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6585700 |
Syringe, syringe plunger and attachment mechanism for front loading medical injector |
Jul. 1, 2003 |
| 5743890 |
Pistons for injection cartridges |
Apr. 28, 1998 |
| 5688255 |
Method and apparatus for removing and disposing of body fluids |
Nov. 18, 1997 |
| 5620423 |
Syringe for the controlled discharge of viscous materials |
Apr. 15, 1997 |
| 5395326 |
Pharmaceutical storage and mixing syringe having high pressure assisted discharge |
Mar. 7, 1995 |
| 5314416 |
Low friction syring assembly |
May. 24, 1994 |
| 5279563 |
Digital display for an inflation system for a balloon catheter |
Jan. 18, 1994 |
| 5236420 |
Bypass, pressurizing piston for chambers |
Aug. 17, 1993 |
| 5202533 |
Drug injection apparatus for an animal |
Apr. 13, 1993 |
| 4741462 |
Adjustable piston packing expander for caulking guns |
May. 3, 1988 |
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