Infusion pump system with disposable cartridge having pressure venting and pressure feedback

  • US 9,211,377 B2
  • Filed: 07/29/2010
  • Issued: 12/15/2015
  • Est. Priority Date: 07/30/2009
  • Status: Active Grant
First Claim
Patent Images

1. A delivery mechanism for an infusion pump comprising:

  • a bore disposed in a delivery mechanism body;

    a spool disposed in the bore which is axially displaceable within the bore; and

    a collapsible volume bounded by an outside surface of the spool, an inside surface of the bore, a first seal between the spool and the bore that is axially fixed relative to the spool but displaceable relative to an inside surface of the bore and a second seal between the spool and the inside surface of the bore which is configured to slide over a slide portion of the spool disposed in an aperture of the second seal, the second seal forming a substantially fluid tight but displaceable seal between an outside surface of the second seal and the inside surface of the bore and the second seal also forming a substantially fluid tight but displaceable seal between an outside surface of the slide portion and an inner surface of the second seal.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×