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Class Information
Number: 604/143
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 > Treating material forced into or out of body by self-acting fluid pressure, motor-driven, or mechanical energy storing means (e.g., pressure infusion or aspiration, etc.) > Material impelled by pressurized charge of gas or vacuum > Material impelled by means (e.g., diaphragm, piston) moved by gas or vacuum pressure > Piston impelled by gas or vacuum pressure
Description: Subject matter wherein the intermediate means moved by gas or vacuum pressure is a piston or ram.


Sub-classes under this class:

Class Number Class Name Patents
604/144 And impelling material conduit into body 20


Patents under this class:
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Patent Number Title Of Patent Date Issued
7591792 Electromagnetic sensors for biological tissue applications and methods for their use Sep. 22, 2009
7559917 Needleless syringe functioning by compression of the reservoir containing the liquid active principle Jul. 14, 2009
7335217 High-speed vitreous cutting system Feb. 26, 2008
6890320 Continuous liquid infusion device May. 10, 2005
6830560 Automatic syringe Dec. 14, 2004
6824529 Pre-filled drug-delivery device and method of manufacture and assembly of same Nov. 30, 2004
6802823 Medication delivery system having selective automated or manual discharge Oct. 12, 2004
6783509 Single-use needle-less hypodermic jet injection apparatus and method Aug. 31, 2004
6689093 Single-use needle-less hypodermic jet injection apparatus and method Feb. 10, 2004
6685673 Continuous liquid infusion device Feb. 3, 2004
6641554 Disposable needle-free injection apparatus and method Nov. 4, 2003
6572581 Ergonomic needle-less jet injection apparatus and method Jun. 3, 2003
6471669 Disposable needle-free injection apparatus and method Oct. 29, 2002
6450991 Delivery devices and their use Sep. 17, 2002
6394981 Method and apparatus for drug infusion May. 28, 2002
6277096 Digital fluid delivery and aspiration apparatus with mechanical de-amplifier Aug. 21, 2001
6264629 Single-use needle-less hypodermic jet injection apparatus and method Jul. 24, 2001
6200054 Device for injecting filling into cracks of wall Mar. 13, 2001
6139530 Liquid medicine injection apparatus utilizing negative pressure Oct. 31, 2000
6096002 NGAS powered self-resetting needle-less hypodermic jet injection apparatus and method Aug. 1, 2000
5997500 Pneumatically operated veterinary pellet implanter Dec. 7, 1999
5976109 Apparatus for drug infusion implanted within a living body Nov. 2, 1999
5951516 Applicator Sep. 14, 1999
5938637 Single-use medicine delivery unit for needleless hypodermic injector Aug. 17, 1999
5919159 Medical injection system and method, gas spring thereof and launching device using gas spring Jul. 6, 1999
5891086 Needle-less injector Apr. 6, 1999
5853384 Fluid jet surgical cutting tool and aspiration device Dec. 29, 1998
5810778 Apparatus for controlled delivery of liquids Sep. 22, 1998
5807337 Liquid infusion apparatus Sep. 15, 1998
5779678 Fluid administration apparatus Jul. 14, 1998
5769824 Apparatus for controlled delivery of liquids Jun. 23, 1998
5746714 Air powered needleless hypodermic injector May. 5, 1998
5741275 Device for the intentional and controllable distribution of a liquid or viscous material Apr. 21, 1998
5730723 Gas pressured needle-less injection device and method Mar. 24, 1998
5558646 Devices and methods for bone/tissue preparation Sep. 24, 1996
5554123 Portable infusion pump Sep. 10, 1996
5456679 Delivery devices with pulsatile effect Oct. 10, 1995
5425706 Dispensing device particularly useful for dispensing nutritional liquids Jun. 20, 1995
5383851 Needleless hypodermic injection device Jan. 24, 1995
5380279 Animal vaccination gun Jan. 10, 1995
5342298 Automated fluid pressure control system Aug. 30, 1994
5328481 Method for injecting viscous fluid into the eye to lift retinal membrane Jul. 12, 1994
5308348 Delivery devices with pulsatile effect May. 3, 1994
5304128 Gas powered self contained syringe Apr. 19, 1994
5295971 Impact releasable pole mounted syringe Mar. 22, 1994
5176645 Pneumatic, modular device for dispensing medication to animals Jan. 5, 1993
5162116 Intra-ruminal device for delivering drugs Nov. 10, 1992
5135500 Self-driven pump device Aug. 4, 1992
5066276 Method and apparatus for injecting viscous fluid into the eye to lift pre-retinal and post-retinal membrane with linear pressure control Nov. 19, 1991
5064413 Needleless hypodermic injection device Nov. 12, 1991

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