Appeal No. 96-2631
Application No. 08/177,616
have suggested any of the following limitations: (1) "trigger
means proximally movable during penetration of the anatomical
cavity wall for triggering said protection means to place said
safety penetrating instrument in said protected state upon said
trigger means moving proximally a predetermined distance whereby,
when said predetermined proximal distance corresponds to the
thickness of the anatomical cavity wall, said safety penetrating
instrument will be placed is said protected state when said
portal sleeve [sic, cannula] distal end enters the anatomical
cavity" as recited in claim 1, (2) "a trigger member movable a
predetermined proximal distance during penetration of the
anatomical cavity wall for triggering release of said locking
means to permit said retracting means to move said penetrating
member from said extended position to said retracted position,
said predetermined distance corresponding to the thickness of the
anatomical cavity wall to allow said penetrating member to be
moved to said retracted position upon introduction of said
cannula distal end in the anatomical cavity" as recited in claim
6, (3) "a trigger member movable proximally a proximal distance
corresponding to the thickness of the anatomical cavity wall; and
triggering the safety penetrating instrument to move to the
protective state when the trigger member has moved the proximal
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