Infusion pump system with disposable cartridge having pressure venting and pressure feedback
First Claim
Patent Images
1. A delivery mechanism of an infusion pump for dispensing fluid to a patient, the delivery mechanism comprising:
- a spool slidingly disposed in a bore of a delivery mechanism housing; and
an o-ring seal disposed on the spool, the o-ring seal comprising;
a gland for seating an o-ring including an outer circumferential groove extending circumferentially around a longitudinal axis of a cylindrical body of the spool, the circumferential groove including an angled first surface and an angled second surface opposite the angled first surface and an inner overflow channel disposed below the angled first and second surfaces and including a pair of sidewalls each extending downwardly from and at an angle to one of the angled first and second surfaces and a bottom; and
an o-ring disposed in the gland with a first circumferential band of the o-ring resting on the first angled surface and a second circumferential band of the o-ring resting on the second angled surface above the overflow channel with the o-ring in a substantially uncompressed state.
7 Assignments
0 Petitions
Accused Products
Abstract
Embodiments are directed to portable infusion devices, systems, and methods of using the same for dispensing materials. In some cases, the devices, systems and methods may be used for infusing a material such as medicament, e.g., insulin, into a body in need thereof.
-
Citations
10 Claims
-
1. A delivery mechanism of an infusion pump for dispensing fluid to a patient, the delivery mechanism comprising:
-
a spool slidingly disposed in a bore of a delivery mechanism housing; and an o-ring seal disposed on the spool, the o-ring seal comprising; a gland for seating an o-ring including an outer circumferential groove extending circumferentially around a longitudinal axis of a cylindrical body of the spool, the circumferential groove including an angled first surface and an angled second surface opposite the angled first surface and an inner overflow channel disposed below the angled first and second surfaces and including a pair of sidewalls each extending downwardly from and at an angle to one of the angled first and second surfaces and a bottom; and an o-ring disposed in the gland with a first circumferential band of the o-ring resting on the first angled surface and a second circumferential band of the o-ring resting on the second angled surface above the overflow channel with the o-ring in a substantially uncompressed state. - View Dependent Claims (2, 3, 4, 10)
-
-
5. A delivery mechanism of an infusion pump for dispensing fluid to a patient, the delivery mechanism comprising:
-
a spool slidingly disposed in a bore of a delivery mechanism housing; and an o-ring seal disposed on the spool, the o-ring seal comprising; a gland for seating an o-ring including an outer circumferential groove extending circumferentially around a longitudinal axis of a cylindrical body, the circumferential groove including a first circumferential surface and a second circumferential surface opposite the first circumferential surface, and an inner overflow channel portion having a bottom; and an o-ring disposed in the gland in an axially compressed state, the o-ring being axially compressed by the first and second circumferential surfaces and disposed above the overflow channel and not contacting the bottom of the overflow channel portion. - View Dependent Claims (6, 7, 8, 9)
-
Specification