Constant force hold tip protector for a safety catheter
First Claim
1. A safety catheter, comprising:
- a catheter hub defining an interior cavity and a catheter tube extending distally of the catheter hub;
a needle hub and a needle cannula extending distally thereof, the needle cannula having a distal tip; and
a tip protector for shielding the distal tip comprising an outer member releasably engaged with the interior cavity of the catheter hub to provide a holding force of the tip protector to the catheter hub, wherein the outer member includes a generally fixed radially outwardly projecting portion to provide the holding force, and an inner member axially received within the outer member, the needle cannula being received in the inner and outer members, the inner member configured to be axially shiftable relative to the outer member between a distal position wherein the distal tip extends distally of the tip protector, and a proximal position wherein the distal tip is within the outer member, wherein the holding force of the outer member to the interior cavity of the catheter hub remains substantially constant irrespective of the position of the inner member between the distal and proximal positions;
wherein the projecting portion has an outer surface defining a radially outermost portion and a contoured surface extending from the radially outermost portion;
wherein the interior cavity of the catheter hub includes a proximal edge and a retention groove extending radially outwardly of the proximal edge; and
wherein the contoured surface of the projecting portion cams against the proximal edge with proximal movement of the outer member so as to plastically deform the catheter hub and effectuate release of the tip protector from the catheter hub.
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0 Petitions
Accused Products
Abstract
A tip protector for a safety catheter includes an outer member releasably engaged with the interior cavity of the catheter hub. The outer member includes a generally fixed radially outwardly projecting portion to provide a holding force, and an inner member axially shiftably received within the outer member. A needle cannula received in the inner and outer members is operable to axially shift the inner member between a distal position wherein the distal tip extends distally of the tip protector, and a proximal position wherein the distal tip is within the outer member. The holding force of the outer member to the interior wall of the catheter hub remains substantially constant irrespective of the position of the inner member between the distal and proximal positions.
239 Citations
24 Claims
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1. A safety catheter, comprising:
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a catheter hub defining an interior cavity and a catheter tube extending distally of the catheter hub; a needle hub and a needle cannula extending distally thereof, the needle cannula having a distal tip; and a tip protector for shielding the distal tip comprising an outer member releasably engaged with the interior cavity of the catheter hub to provide a holding force of the tip protector to the catheter hub, wherein the outer member includes a generally fixed radially outwardly projecting portion to provide the holding force, and an inner member axially received within the outer member, the needle cannula being received in the inner and outer members, the inner member configured to be axially shiftable relative to the outer member between a distal position wherein the distal tip extends distally of the tip protector, and a proximal position wherein the distal tip is within the outer member, wherein the holding force of the outer member to the interior cavity of the catheter hub remains substantially constant irrespective of the position of the inner member between the distal and proximal positions; wherein the projecting portion has an outer surface defining a radially outermost portion and a contoured surface extending from the radially outermost portion; wherein the interior cavity of the catheter hub includes a proximal edge and a retention groove extending radially outwardly of the proximal edge; and wherein the contoured surface of the projecting portion cams against the proximal edge with proximal movement of the outer member so as to plastically deform the catheter hub and effectuate release of the tip protector from the catheter hub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A safety catheter, comprising:
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a catheter hub and a catheter tube extending distally thereof; a needle hub and a needle cannula extending distally thereof, the needle cannula having a distal tip; and a tip protector for shielding the distal tip comprising an outer member releasably engaged with an interior cavity of the catheter hub to provide a holding force of the tip protector to the catheter hub, and an inner member axially received within the outer member, the needle cannula being received in the inner and outer members, the inner member configured to be axially shiftable relative to the outer member between a distal position wherein the distal tip extends distally of the tip protector, and a proximal position wherein the distal tip is within the outer member, wherein the holding force of the outer member to the interior of the catheter hub remains substantially constant irrespective of the position of the inner member between the distal and proximal positions, and wherein the inner member is positioned in the catheter hub at least when in the distal position; wherein the projecting portion has an outer surface defining a radially outermost portion and a contoured surface extending from the radially outermost portion; wherein the interior cavity of the catheter hub includes a proximal edge and a retention groove extending radially outwardly of the proximal edge; and wherein the contoured surface of the projecting portion cams against the proximal edge with proximal movement of the outer member so as to plastically deform the catheter hub and effectuate release of the tip protector from the catheter hub. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification