Method and apparatus for wireless chemical supplying

• US 5,569,187 A
• Filed: 08/16/1994
• Issued: 10/29/1996
• Est. Priority Date: 08/16/1994
• Status: Expired due to Fees

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Kaiser, Ulrich
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US08/291,257
• Time in Patent Office: 805 Days
• Field of Search: 604/30-34, 604/65-67, 604/890.1, 604/891.1, 604/892.1, 604/250-255
• US Class Current: 604/67
• CPC Class Codes: A61M 2205/3523 using telemetric means
• CPC Class Codes: A61M 5/14276 specially adapted for implantation

Abstract

A method and apparatus for wireless supplying of chemicals is provided in which an interrogation unit (14) transmits interrogation signals. A responder unit (16), powered from the interrogation signals, is operable to receive the interrogation signals and transmit responses. The responder unit (16) controls operation of an actuator (10). The actuator is coupled to a supply tank (12), which supplies chemicals under control of the actuator (10).

Claims

1. A wireless chemical supply system, comprising:

an interrogation unit operable to transmit interrogation signals and receive responses;

a responder unit, being powered from said interrogation signals, said responder unit operable to receive said interrogation signals and transmit responses to said interrogation signals;

an actuator coupled to said responder unit, said actuator operable to receive control signals from said responder unit; and

a supply tank operatively coupled to said actuator, said supply tank operable to supply chemicals under control of said actuator.

2. The system of claim 1, wherein said actuator and said responder unit comprise a single integrated circuit.

3. The system of claim 1, wherein said actuator, said responder unit, and said supply tank comprise a single integrated circuit.

4. The system of claim 1, wherein said responder unit further comprises a processor operable to monitor and control the amount of chemical supplied from said supply tank.

5. The system of claim 1, further comprising a supplemental supply tank, wherein said supplemental supply tank is operatively coupled to said supply tank for providing said supply tank additional chemicals.

6. The system of claim 1, wherein said actuator comprises a piezoelectric pressure oscillator operable to pump chemicals from said supply tank.

7. The system of claim 1, wherein said actuator comprises a valve, and wherein said supply tank is pressurized.

8. The system of claim 1, wherein the wireless chemical supply is operable to supply insulin.

9. The system of claim 1, further comprising a control circuit, said control circuit operatively coupled to said interrogation unit, said control circuit operable to provide control data to said interrogation unit for transmission to said responder unit.

10. A wireless chemical supply system, comprising:

an interrogation unit operable to transmit and receive interrogation signals and receive responses;

a plurality of supply tanks each operable to supply chemicals;

a plurality of actuators, one each of said actuators associated with one each of said supply tanks, said actuators operable to control supply of chemicals from said supply tanks;

a plurality of responder units, one each of said responder units associated with one each of said actuators and one each of said supply tanks, said responder units being powered from said interrogation signals, said responder units operable to receive said interrogation signals, control operation of said actuators, and transmit responses to said interrogation signals.

11. The system of claim 10, wherein at least one of said actuators and associated responder unit comprise a single integrated circuit.

12. The system of claim 10, wherein at least one of said actuators and associated supply tank and responder unit comprise a single integrated circuit.

13. The system of claim 10, wherein at least one of said responder units further comprises a processor operable to monitor and control the amount of chemical supplied from said supply tank associated with said responder unit.

14. The system of claim 10, further comprising a plurality of housings, wherein at least one of said responder units and associated supply tank and actuator are substantially disposed within one each of said associated housings.

15. The system of claim 10, further comprising a plurality of supplemental supply tanks, wherein at least one of said supply tanks is operatively coupled to one each of said supplemental supply tanks.

16. The system of claim 10, wherein said interrogation unit is operable to modulate said interrogation signal to provide individual responder unit addressing, and wherein each of said responder units comprises:

a demodulator operable to demodulate interrogation signals into addresses;

a processor coupled to said demodulator and operable to compare the demodulated addresses with a responder unit address; and

enabling circuitry operable to enable said responder unit when said demodulated address matches said responder unit address.

17. A method for wireless supply of chemicals, comprising:

transmitting an interrogation signal from an interrogation unit to a responder unit, the responder unit associated with a supply tank and an actuator;

receiving the interrogation signal at the responder unit;

powering the responder unit from the interrogation signal;

operating the actuator under control of the responder unit; and

supplying chemicals from the supply tank under control of the actuator.

18. The method of claim 17, further comprising supplying chemicals to the supply tank from a supplemental supply tank.

19. The method of claim 17, further comprising:

controlling the amount of chemical supplied from the supply tank;

monitoring the amount of chemical supplied from the supply tank; and

transmitting responses to the interrogation signal based upon the amount of chemical supplied from the supply tank.

20. The method of claim 17, further comprising:

modulating at least some of the interrogation signals to provide individual responder unit addressing;

demodulating the interrogation signals at each responder unit into a demodulated signal address;

comparing the demodulated signal address to an individual responder unit address at each responder unit; and

enabling each responder unit to respond when the demodulated signal address matches the individual responder unit address.