Needle protection injection devices
First Claim
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1. A needle protector for use on an injection device and comprising a first sleeve, a second sleeve axially slidable relative to the first sleeve and a force element between the two sleeves whereby a trigger pressure must be overcome to unexpectedly axially displace the second sleeve.
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Abstract
The present invention provides a needle protector for use with an injection device, wherein the needle protector includes a first sleeve, a second sleeve that can at least partially be slid into or over the first sleeve and a force element functioning between the two sleeves, wherein a pressure or trigger point has to be overcome to displace the second sleeve.
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Citations
20 Claims
- 1. A needle protector for use on an injection device and comprising a first sleeve, a second sleeve axially slidable relative to the first sleeve and a force element between the two sleeves whereby a trigger pressure must be overcome to unexpectedly axially displace the second sleeve.
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19. A needle protector having a proximal end, a distal end and an axis extending generally therebetween, said needle protector comprising a first sleeve and a second sleeve, one of said sleeves axially slidable with respect to the other sleeve, and a force element operably coupling the two sleeves, whereby a pressure must be overcome to slidably displace the slidable sleeve toward the proximal end, said force element comprising at least one cam member carried by one sleeve and an associated path carried by the other sleeve for operably receiving the cam member, said path comprising a first straight region extending generally in the direction of slidable displacement and a second straight region angled with respect to the first region, and a spring operably coupled to said sleeves and urging the slidable sleeve generally toward the distal end.
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20. A needle protector for use on an injection device, said needle protector having an axial length, and comprising a first sleeve and a second sleeve, one of said sleeves axially slidable with respect to the other sleeve, and a force operably coupling the two sleeves, whereby a pressure must be overcome to accomplish an injection, said force element comprising at least one cam member carried by one sleeve and an associated path carried by the other sleeve for operably receiving the cam member, said path comprising a first straight region extending generally in the direction of the slidable movement and a second straight region angled with respect to the first region, and a spring operably coupled to said sleeves and urging the needle protector to the axial length.
Specification