Anesthesia apparatus or ventilator with a hot wire sensor, hot wire sensor and hot wire sensor module for a hot wire sensor

Patent metadata

Field	Value
Publication number	US-10714871-B2
Application number	US-201715708651-A
Country	US
Kind code	B2
Filing date	Sep 19, 2017
Priority date	Sep 20, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A medical device, for example, an anesthesia apparatus or ventilator, including a hot wire sensor ( 10 ); a hot wire sensor ( 10 ) and a hot wire module ( 14 ) for a hot wire sensor ( 10 ) are provided. A first hot wire and a second hot wire ( 26, 28 ), namely, a measuring wire ( 26 ) and a compensation wire ( 28 ), are connectable to the hot wire sensor ( 10 ), for example, in the form of a hot wire module ( 14 ), in an electrically conductive manner. A first contact pair ( 52, 54 ) is associated with the measuring wire ( 26 ) for contacting same and a second contact pair ( 56, 58 ) is associated with the compensation wire ( 28 ) for contacting same. The contacts of the second contact pair ( 56, 58 ) are configured as leading contacts in relation to at least one of the contacts of the first contact pair ( 52, 54 ).

First claim

What is claimed is:

1. A hot wire sensor comprising:
a hot wire sensor circuit comprising a measuring contact pair and a compensation contact pair, the measuring contact pair being disposed in a predetermined position relative to the compensation contact pair; and
a hot wire module for electrically and mechanically detachably connecting to the hot wire sensor circuit, via the measuring contact pair and the compensation contact pair, wherein the hot wire module comprises:
a first hot wire comprising a measuring wire;
a second hot wire comprising a compensation wire; and
a chronological contact means for chronologically electrically connecting the compensation wire to the hot wire sensor circuit prior to electrically connecting the measuring wire to hot wire sensor circuit, the chronological contact means comprising a contact pair arrangement comprising measuring wire contacts for an electrically conductive contact connection of the measuring wire to the hot wire sensor circuit in a state of a mechanical connection of the hot wire module to the hot wire sensor circuit and compensation wire contacts for an electrically conductive contact connection of the compensation wire to the hot wire sensor circuit in the state of the mechanical connection of the hot wire module to the hot wire sensor circuit, the chronological contact means chronologically electrically contact connecting the compensation wire contacts to the compensation contact pair prior to electrically contact connecting the measuring wire contacts to the measuring contact pair, as the hot wire module is being mechanically connected to the hot wire sensor circuit to change from a mechanically unconnected state to the state of the mechanical connection.

2. A hot wire sensor according to claim 1 , wherein the chronological contact means is formed with the compensation wire contacts configured as leading contacts in relation to at least one of the measuring wire contacts for an electrically conductive connection of the compensation wire to the hot wire sensor circuit in advance of an electrically conductive connection of the measuring wire to the hot wire sensor circuit.

3. A hot wire module for an electrically and mechanically detachable connection to a measuring contact pair and a compensation contact pair of a circuit of a hot wire sensor, the hot wire module comprising:
a first hot wire comprising a measuring wire;
a second hot wire comprising a compensation wire; and
a chronological contact means for chronologically electrically connecting the compensation wire to the circuit of the hot wire sensor prior to connecting the measuring wire to the circuit of the hot wire sensor, the chronological contact means comprising a contact pair arrangement comprising measuring wire contacts for an electrically conductive contact connection of the measuring wire to the circuit of the hot wire sensor, upon completing a mechanical connection of the hot wire module to the circuit of the hot wire sensor, and compensation wire contacts for an electrically conductive contact connection of the compensation wire to the circuit of the hot wire sensor, upon completing the mechanical connection of the hot wire module to the circuit of the hot wire sensor, the chronological contact means chronologically electrically contact connecting the compensation wire contacts to the compensation contact pair prior to electrically contact connecting the measuring wire contacts to the measuring contact pair, as the hot wire module is mechanically connected to the circuit of the hot wire sensor.

4. A hot wire module according to claim 3 , wherein the chronological contact means is formed with a configuration of the contact pair arrangement wherein the contacts of the compensation wire contact pair are configured as leading contacts in relation to at least one of the contacts of the measuring wire contact pair for an electrically conductive connection of the compensation wire to the circuit in advance of an electrically conductive connection of the measuring wire to the circuit.

5. A hot wire module in accordance with claim 4 , wherein the contacts of the compensation wire contact pair are configured as leading contacts in relation to both contacts of the measuring wire contact pair.

6. A hot wire module in accordance with claim 4 , wherein the contacts of the compensation wire contact pair and the contacts of the measuring wire contact pair are configured as pins, and wherein the contacts of the compensation wire contact pair are configured as leading contacts in relation to at least one of the contacts of the measuring wire contact pair, by at least one of the pins of the measuring wire contact pair being configured as being shorter than the pins of the compensation wire contact pair.

7. A hot wire module in accordance with claim 5 , wherein the contacts of the compensation wire contact pair and the contacts of the measuring wire contact pair are configured as pins, and wherein the contacts of the compensation wire contact pair are configured as leading contacts in relation to at least one of the contacts of the measuring wire contact pair, by at least one of the pins of the measuring wire contact pair being configured as being shorter than the pins of the measuring wire contact pair.

8. A hot wire module in accordance with claim 3 , further comprising adjustment means for axially adjusting the hot wire module during connection to the circuit of the hot wire sensor.

9. A hot wire sensor comprising:
hot wire sensor circuitry with a module physical interface comprising a measuring contact pair and a compensation contact pair, the measuring contact pair being disposed in a predetermined position relative to the compensation contact pair; and
a hot wire module configured to be electrically and mechanically connectable and disconnectable from the hot wire sensor circuitry via the module physical interface, the hot wire module comprising:
a first hot wire comprising a measuring wire;
a second hot wire comprising a compensation wire; and
a chronological contact means for chronologically electrically connecting the compensation wire to the hot wire sensor circuitry prior to electrically connecting the measuring wire to the hot wire sensor circuitry, the chronological contact means comprising a contact pair arrangement comprising measuring wire contacts for an electrically conductive contact connection of the measuring wire to the measuring contact pair of the module physical interface, upon completing a mechanical connection of the hot wire module to the module physical interface, and compensation wire contacts for an electrically conductive contact connection of the compensation wire to the compensation contact pair of the module physical interface, upon completing the mechanical connection of the hot wire module to the module physical interface, the chronological contact means chronologically electrically contact connecting the compensation wire contacts to the compensation contact pair prior to electrically contact connecting the measuring wire contacts to the measuring contact pair, as the hot wire module is mechanically connected to the module physical interface.

10. A hot wire sensor according to claim 9 , wherein the chronological contact means is formed with a configuration of the contact pair arrangement of the hot wire module wherein the contacts of the compensation wire contact pair are configured as leading contacts in relation to at least one of the contacts of the measuring wire contact pair for an electrically conductive connection of the compensation wire to the circuit in advance of an electrically conductive connection of the measuring wire to the circuit.

11. A hot wire se

Assignees

• Draegerwerk Ag & Co Kgaa

Inventors

• Heesch Ralf
• Kellner Bernd
• Gerder Henning
• Ressing Thomas
• Timmann Andreas

Classifications

• G01F1/44 Primary

  Venturi tubes · CPC title

• H01R13/642 Primary

  by position or shape of contact members · CPC title

• A61M2205/3368

  Temperature · CPC title

• A61M16/0003

  Accessories therefor, e.g. sensors, vibrators, negative pressure · CPC title

• A61M2016/0036

  in the breathing tube and used in both inspiratory and expiratory phase · CPC title