Needle tip shielding device and catheter hub therefore

A needle tip shielding device, comprising:

• a base plate with a hole extending therethrough from a proximal side of the base plate to a distal side of the base plate;
• and
• a first and second resilient arm extending from said base plate, the first resilient arm is longer than the second resilient arm, the first resilient arm has a distal hook extending inwardly, the second resilient arm has a distal hook extending inwardly, both arms having a resting state wherein, in the resting state of the first resilient arm, the distal hook of the first resilient arm coincides with a straight imaginary line extending longitudinally through said hole extending in an axial direction of said base plate,
• wherein the first resilient arms has a knob, said knob extending laterally from a distal end of the first resilient arm, and said knob having an outer curvature and lateral end surfaces, the outer curvature being in a transversal plane around an axis parallel to a central axis of the needle tip shielding device.

A needle tip shielding device, comprising:

• a base plate having a central axis and a hole extending from a proximal side of the base plate to a distal side of the base plate;
• a first resilient arm extending from said base plate;
• a second resilient arm extending from said base plate;
• and
• a hub operable to receive said first and second resilient arms, said hub having an interior cavity with a first groove and a second groove that is spaced apart axially from said first groove;
• wherein each resilient arm includes a distal hook and a knob, the knob of the first resilient arm is operable to be received within the first groove, the knob of the second resilient arm is operable to be received within the second groove, and
• wherein each knob includes an outer curvature and lateral end surfaces.