Electrostatic charge resistant instrument system

• US 6,370,003 B1
• Filed: 11/30/1999
• Issued: 04/09/2002
• Est. Priority Date: 11/30/1999
• Status: Expired due to Fees

• Current Assignee: Welch Allyn Incorporated
• Original Assignee: Welch Allyn Incorporated
• Inventors: Hennick, Robert J.
• Primary Examiner(s): Jackson, Stephen W.
• Application Number:
  US09/450,620
• Time in Patent Office: 861 Days
• Field of Search: 361/212, 361/220, 361/56
• US Class Current: 361/220
• CPC Class Codes: H05F 3/02 by means of earthing connections

Abstract

The invention is an electrostatic charge resistant instrument system comprising at least one instrument, a lead extending from the instrument, and at least one connector associated with the lead. In accordance with the invention, each component of the instrument system is made to have an electrically grounded conductive outer surface so that electrostatic charges are prevented from building up substantially throughout the entire instrument system. A lead of the system can be made to have a conductive outer surface by forming about the lead a flexible conductive housing provided by at least one small diametered wire arranged to encircle the lead a plurality of times in a spiral, mesh or braided mesh configuration. Conductive outer surfaces of instruments and connectors, meanwhile, may be provided by forming the instruments and connectors of the system from conductive polymeric materials containing a polymeric base material and conductive fibers and or particles embedded therein. A connector may be formed on a lead by first forming an elongated conductive flexible housing on a lead and then overmolding a conductive material directly onto the lead conductive housing during the formation of the connector.

Claims

1. An electrostatic charge resistant instrument system comprising;

at least one instrument;

an elongated electrical lead extending from said at least one instrument terminating on at least one end in a connector, wherein each of said at least one instrument, said lead, and said connector includes an electrically grounded conductive outer surface.

2. The system of claim 1, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing formed thereon substantially along a length of said lead.

3. The system of claim 2, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing, and wherein said elongated conductive housing comprises at least one small diametered wire arranged to encircle said lead a plurality of times.

4. The system of claim 2, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing, and wherein said elongated conductive housing comprises at least two small diametered wires arranged to encircle said lead a plurality of times in opposite directions.

5. The system of claim 2, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing, and wherein said elongated conductive housing comprises at least two small-diametered wires arranged to encircle said lead a plurality of times in opposite directions in an alternating overlopping and underlapping mesh configuration.

6. The system of claim 1, wherein an outer surface of said at least one instrument is formed from a conductive polymeric material.

7. The system of claim 1, wherein an outer surface of said connector is formed from a conductive polymeric material.

8. The system of claim 1, wherein outer surfaces of said at least one instrument and said connector are formed from conductive polymeric material.

9. The system of claim 1, wherein said outer surface of said lead includes a flexible elongated conductive housing and wherein outer surfaces of said at least one instrument and said connector are formed from conductive polymeric material.

10. The system of claim 1, wherein said outer surface of said lead includes a flexible elongated conductive housing, wherein outer surfaces of said at least one instrument and said connector are formed from conductive polymeric material and wherein an electrical connection between said outer surface of said connector and said outer surface of said conductive housing of said lead is formed by overmolding conductive polymeric material onto said conductive housing in the formation of said connector.

11. The system of claim 1, wherein said outer surface of said lead includes a flexible elongated conductive housing wherein outer surfaces of said at least one instrument and said connector are formed from conductive polymeric material, wherein said lead and said connector are electrically connected, and wherein said flexible elongated conductive housing comprises at least one small diametered wire arranged to encircle said lead a plurality of times.

12. The system of claim 1, wherein said outer surface of said lead includes a flexible elongated conductive housing wherein outer surfaces of said at least one instrument and said connector are formed from conductive polymeric material, wherein said lead and said connector are electrically connected, and wherein said elongated conductive housing comprises at least two small diametered wires arranged to encircle said lead a plurality of times in opposite directions.

13. The system of claim 1, wherein said outer surface of said lead includes a flexible elongated conductive housing wherein outer surfaces of said at least one instrument and said connector are formed from conductive polymeric material, wherein said lead and said connector are electrically connected, and wherein said flexible elongated conductor comprises at least two small-diametered wires arranged to encircle said lead a plurality of times in opposite directions in an alternating overlapping and underlapping mesh configuration.

14. The system of claim 1, wherein said system includes at least two instruments, wherein a first of said instruments is a data collection device and a second of said instruments is a personal computer having a conductive polymeric housing, wherein said lead extending from said at least one instrument is a multiconductor cable connecting said data collection device to said personal computer, wherein said lead includes an elongated flexible conductive housing extending substantially along a length of said lead, and wherein said connector is formed of a conductive polymeric material and overmolded onto said housing.

15. The system of claim 14 further comprising a mouse having a conductive outer surface and being connected to said personal computer by a lead having a conductive outer surface.

16. The system of claim 14 further comprising a mouse, a keyboard, and a monitor, each comprising a conductive outer surface and being connected to said personal computer by a lead having a conductive outer surface.

17. The system of claim 1, wherein said system includes at least two instruments, wherein a first of said instruments is a medical device and a second of said instruments is a control box having a conductive polymeric housing, wherein said lead extending from said at least one instrument is a multiconductor cable connecting said medical device to said control box, wherein said lead includes an elongated flexible conductive housing extending substantially along a length of said lead, and wherein said connector is formed of a conductive polymeric material overmolded onto said housing.

18. The system of claim 1, further comprising a monitor having a conductive outer surface and being connected to said control box by a lead having a conductive outer surface.

19. An electrostatic charge resistant instrument system comprising:

at least one instrument;

an elongated electrical lead extending from said at least one instrument, wherein said electrical lead is adapted for attaching said at least one instrument either to a resistive instrument or to a wall outlet and wherein each of said at least one instrument and said lead includes an electrically grounded conductive outer surface.

20. The system of claim 19, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing formed thereon substantially along a length of said lead.

21. The system of claim 20, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing, and wherein said elongated conductive housing comprises at least one small diametered wire arranged to encircle said lead a plurality of times.

22. The system of claim 20, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing, and wherein said elongated conductive housing comprises at least two small diametered wires arranged to encircle said lead a plurality of times in opposite directions.

23. The system of claim 20, wherein said conductive outer surface of said lead includes a flexible elongated conductive housing, and wherein said elongated conductive housing comprises at least two small-diametered wires arranged to encircle said lead a plurality of times in opposite directions in an alternating overlapping and underlappingmesh configuration.

24. The system of claim 19, wherein an outer surface of said at least one instrument is formed from a conductive polymeric material.

25. The system of claim 19, wherein said system includes at least two instruments, wherein a first of said instruments is a data collection device and a second of said instruments is a personal computer having a conductive polymeric housing, wherein said lead extending from said at least one instrument is a multiconductor cable connecting said data collection device to said personal computer, and wherein said lead includes an elongated flexible conductive housing extending substantially along a length of said lead.

26. The system of claim 25, further comprising a mouse having a conductive outer surface and being connected to said personal computer by a lead having a conductive outer surface.

27. The system of claim 25, further comprising a mouse, a keyboard, and a monitor, each comprising a conductive outer surface and being connected to said personal computer by a lead having a conductive outer surface.

28. The system of claim 19, wherein said system includes at least two instruments, wherein a first of said instruments is a medical device and a second of said instruments is a control box having a conductive polymeric housing, wherein said lead extending from said at least one instrument is a multiconductor cable connecting said medical device to said control box, and wherein said lead includes an elongated flexible conductive housing extending substantially along a length of said lead.

29. The system of claim 28, further comprising a monitor having a conductive outer surface and being connected to said control box by a lead having a conductive outer surface.