Pen needle

A pen needle, comprising:

• a hub having a distal end, and a proximal end for attachment to a delivery device;
• a needle coupled to said hub and having a distal end extending from said distal end of said hub;
• a distal needle shield coupled to said hub and slidable between a first extended position to cover said distal end of said needle, a retracted position to expose said distal end of said needle for injecting a substance into a patient, and a second extended position to cover said distal end of said needle, wherein said distal needle shield is rotatable by axial movement relative to said hub from a first angular position in which said distal needle shield slides in said hub from said first extended position to said retracted position to a second angular position, and where said distal needle shield in the second angular position is configured to slide axially to the second extended position, which is a locked position;
• an indicator positioned in said hub, where said distal needle shield is configured to couple to said indicator when moved to the retracted position, and said indicator is configured to be carried by said distal needle shield when said distal needle shield is moved to the second extended position, where said indicator is visible when said distal needle shield moves to the second extended position;
• a proximal needle shield configured for covering a proximal end of said needle, and where said proximal needle shield is connected to a frangible member to retain said proximal needle shield in a retracted position, and where said frangible member is configured to break to enable said proximal needle shield to move to an extended position to cover said proximal end of said needle;
• and
• a spring having a first end engaging said distal needle shield for biasing said distal needle shield to the second extended position, and a second end engaging said proximal needle shield for biasing said proximal needle shield to the extended position, wherein:
• said spring comprises a coil spring, and where said spring has an axial passage, the first end engaging said distal needle shield and the second end engaging said proximal needle shield;
• and
• the indicator is positioned in said axial passage of said coil spring.

A pen needle, comprising:

• a hub having a distal end, and a proximal end for attachment to a delivery device;
• a needle coupled to said hub and having a distal end extending from said distal end of said hub;
• a distal needle shield coupled to said hub and slidable between a first extended position to cover said distal end of said needle, a retracted position to expose said distal end of said needle for injecting a substance into a patient, and a second extended position to cover said distal end of said needle, wherein said distal needle shield is rotatable by axial movement relative to said hub from a first angular position in which said distal needle shield slides in said hub from said first extended position to said retracted position to a second angular position, and where said distal needle shield in the second angular position is configured to slide axially to the second extended position, which is a locked position;
• and
• an indicator positioned in said hub, where said distal needle shield is configured to couple to said indicator when moved to the retracted position, and said indicator is configured to be carried by said distal needle shield when said distal needle shield is moved to the second extended position, where said indicator is visible when said distal needle shield moves to the second extended position, wherein said indicator is received within said distal needle shield and is visible through a wall of said distal needle shield.