1
Charles C Hart, Mark A Ritchart, Donald L Gadberry: Trocar with floating septum seal. Applied Medical Resources Corporation, Richard L Myers, January 31, 1995: US05385553 (302 worldwide citation)

A trocar having a cannula and housing which define an access channel, is configured to receive a surgical instrument. A flexible valve disposed in the channel includes first portions which define an orifice through the valve and second portions which are disposed outwardly of the first portions. The ...


2
Mark A Ritchart, Robert P Cooper, Charles C Hart, Donald L Gadberry: Lever actuated septum seal. Applied Medical Resources, Richard L Myers, May 11, 1993: US05209737 (271 worldwide citation)

A septum valve in a trocar assembly has a variable orifice that is responsive to a cross-sectional dimension of the surgical instrument being inserted into the trocar channel, thereby minimizing leakage of inflation gas from the body cavity, such as the abdomen, being operated on. An elastomeric sep ...


3
Charles C Hart, Donald L Gadberry: Grasping clip applier. Applied Medical Resources Corporation, Richard L Myers, October 31, 2000: US06139555 (258 worldwide citation)

A surgical clip applier for use in applying ligation as well as fixation surgical clips or fasteners to a vessel or other tissue at a surgical site. The clip applier includes an elongated hollow outer body having a proximal end attached to an actuating mechanism and a distal end. A pair of generally ...


4
Said S Hilal, Robert P Cooper, Donald L Gadberry: Apparatus for sealing around members extending therethrough. Applied Vascular Devices, Richard L Myers, July 7, 1992: US05127626 (200 worldwide citation)

An apparatus is provided for sealing around shafts or tubes of varying diameter. Its basic element comprises an elastomeric sealing body with an axial passage which is radially compressed from more than two sides to compress the passage into sealing engagement with a member extending through the pas ...


5
Charles C Hart, Donald L Gadberry: Seal assembly for access device. Applied Medical Resources, Richard L Myers, August 22, 1995: US05443452 (187 worldwide citation)

Access devices to facilitate the introduction of various surgical instruments into vessels, conduits, cavities, and other interior regions of the body are disclosed, which include a "duck bill" valve having at least three flexible fold sections or leaflets subtending 360.degree. degrees of the cylin ...


6
Donald L Gadberry: Trocar with universal seal protector. Applied Medical Resources, Richard L Myers, December 19, 1995: US05476475 (174 worldwide citation)

A trocar is adapted to provide a working channel across a body wall to accommodate a surgical instrument having a sharp or puncture prone configuration. The trocar includes a cannula and a housing which encloses at least one septum seal. A valve adjuster is movable by the instrument from a first pos ...


7
Timothy C Ryan, Charles C Hart, Mark A Ritchart, Donald L Gadberry: Elastomeric valve assembly. Applied Medical Resources Corporation, Richard L Myers, October 10, 1995: US05456284 (168 worldwide citation)

A medical access device is adapted to receive an instrument and comprises a housing defining an inner channel and a valve disposed in the channel to form a seal with the housing. The valve includes an outer wall and a pair of inner walls extending in distally converging relationship to define a slot ...


8
Donald L Gadberry: Breathing gas mask. U S D, George F Bethel, Patience K Bethel, September 6, 1983: US04402316 (154 worldwide citation)

The following specification discloses a breathing gas mask having an elastomeric or plastic main body portion supported by a head band formed with a number of supporting straps for holding the mask to a user's face. The mask has a large viewing lens with an elongated protuberance in the form of a be ...


9
Charles C Hart, Donald L Gadberry: Seal assembly for access device. Applied Medical Resources Corporation, Richard L Myers, July 21, 1998: US05782812 (144 worldwide citation)

A trocar having a working channel extending between a distal end and a proximal end is adapted for disposition across a body wall. A valve is disposed in the working channel so that an instrument inserted into the working channel extends through the valve resulting in undesirable friction forces. Th ...


10
Charles C Hart, Donald L Gadberry, Eduardo Chi Sing: Method and apparatus for endoconduit targeting. Applied Medical Resources Corporation, Richard L Myers, June 10, 1997: US05636644 (133 worldwide citation)

A method for performing a surgical operation on a body conduit includes the step of inserting into the conduit an apparatus having at its distal end an element the location of which is detectable from regions exterior of the body. The apparatus is moved within the conduit until the element is positi ...