Linear rotation stabilizer for a telescoping syringe stopper driverdriving assembly

  • US 10,149,943 B2
  • Filed: 05/29/2015
  • Issued: 12/11/2018
  • Est. Priority Date: 05/29/2015
  • Status: Active Grant
First Claim
Patent Images

1. An assembly for driving a stopper in a drug reservoir of a drug delivery device, the assembly comprising:

  • an anti-rotational stabilizer anti-rotationally coupled to a housing of the drug delivery device;

    a stopper adapter configured to engage the stopper of the drug reservoir;

    a telescoping assembly that telescopes by relative rotation between at least a proximal shaft and a distal shaft oriented along an axis of said reservoir;

    the proximal shaft being linearly stabilized by a shoulder bearing of the anti-rotational stabilizer, said shoulder bearing preventing movement of said proximal shaft in a proximal direction with respect to the anti-rotational stabilizer while permitting rotation of said proximal shaft with respect to the anti-rotational stabilizer and the distal shaft being in engagement with the stopper adapter; and


    anti-rotational guides including telescoping posts anti-rotationally extending between the anti-rotational stabilizer and the stopper adapter,wherein rotating said proximal shaft with respect to said anti-rotational stabilizer moves said distal shaft and said stopper adapter along said axis, thereby slidably expanding the anti-rotational telescoping posts.

View all claims

    Thank you for your feedback