Sensor assembly and medical device incorporating same

• US 8,495,918 B2
• Filed: 10/20/2010
• Issued: 07/30/2013
• Est. Priority Date: 10/20/2010
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Bazargan, Afshin, Vazquez, Pablo, Kow, Hsiao-Yu S.
• Primary Examiner(s): FLICK, JASON E
• Application Number:
  US12/908,812
• Publication Number:
  US 20120101436A1
• Time in Patent Office: 1,014 Days
• Field of Search: 604/151
• US Class Current: 73/818
• CPC Class Codes: A61M 2005/16863 Occlusion detection
• CPC Class Codes: A61M 2205/332 Force measuring means
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/16831 Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066
• CPC Class Codes: G01L 1/04 by measuring elastic deformation of gauges, e.g. of springs
• CPC Class Codes: G01L 1/2231 the supports being disc- or ring-shaped, adapted for measuring a force along a single direction
• CPC Class Codes: G01L 5/12 for measuring axial thrust in a rotary shaft, e.g. of propulsion plants

Abstract

Apparatus are provided for sensor assemblies and related medical devices. An embodiment of a sensor assembly includes a rigid structure and a beam structure having an outer portion in contact with the rigid structure and an inner portion. The beam structure includes one or more beams extending between the outer portion and the inner portion of the beam structure and a cantilevered portion extending from the inner portion to inhibit displacement of the inner portion toward the rigid structure. Each beam has a sensing element disposed thereon.

Claims

1. A sensor assembly, comprising:

a back plate structure;

a beam structure comprising;

an outer portion affixed to the back plate structure;

an inner portion;

a plurality of arm portions between the outer portion and the inner portion, each arm portion having a sensing element disposed thereon; and

a plurality of cantilevered portions extending radially outward from the inner portion, the cantilevered portions being freestanding with respect to the outer portion; and

a loading element mechanically coupled to the inner portion, the loading element to displace the inner portion towards the back plate structure with respect to the outer portion in response to a force applied to the sensor assembly, the cantilevered portions impeding displacement of the inner portion when the force applied to the sensor assembly is greater than a threshold value.

2. The sensor assembly of claim 1, wherein one or more cantilevered portions of the plurality of cantilevered portions contacts the back plate structure when the force applied to the sensor assembly is greater than the threshold value.

3. The sensor assembly of claim 1, further comprising a dampening material affixed to each of the cantilevered portions, the dampening material of one or more cantilevered portions of the plurality of cantilevered portions contacting the back plate structure to impede displacement of the inner portion.

4. The sensor assembly of claim 1, wherein each cantilevered portion is located between two adjacent arm portions.

5. The sensor assembly of claim 4, wherein each arm portion is located between two adjacent cantilevered portions.