05308336 is referenced by 255 patents and cites 19 patents.

An access device has an axis extending between a proximal end and an opposing distal end, and properties for facilitating introduction into the body of an instrument having a pointed distal tip. The device includes a housing having walls defining a channel extending through the device and a valve disposed in the housing across the channel and adapted to form a seal around the instrument. The valve includes inner portions defining an aperture to receive the instrument and outer portions extending radially outwardly of the inner portions. Means carried by the housing is positioned to be disposed between the instrument and at least the outer portion of the seal for isolating the seal from the pointed distal tip during insertion of the instrument.

Title
Seal protection mechanism
Application Number
732141
Publication Number
5308336
Application Date
September 28, 1982
Publication Date
May 3, 1994
Inventor
Mark A Ritchart
Murrieta
CA, US
Charles C Hart
Huntington Beach
CA, US
Agent
Richard L Myers
Assignee
Applied Medical Resources
CA, US
IPC
A61M 5/178
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