Stimulator system

• US 4,431,001 A
• Filed: 09/10/1981
• Issued: 02/14/1984
• Est. Priority Date: 09/17/1980
• Status: Expired due to Fees

• Current Assignee: Landskrona Finans AB
• Original Assignee: Crafton Medical AB
• Inventors: Saario, Roy A., Hakansson, Bo H.
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): Sykes, Angela D.
• Application Number:
  US06/300,952
• Time in Patent Office: 887 Days
• Field of Search: 128/24.1, 128/24.2, 128/24.5, 128/783-784, 128/788, 128/419 P, 128/419 PG, 128/419 PS, 128/419 PT, 128/419 R, 128/419 E, 128/420 R , 128/420 A, 128/421-422, 320/27-29, 320/47, 320/49, 320/53, 320/57, 320/59, 320/61-62, 320/DIG.1-DIG. 2
• US Class Current: 607/72
• CPC Class Codes: A61N 1/048 Electrodes characterised by a specific connection between lead and electrode
• CPC Class Codes: A61N 1/36034 specified by the stimulation parameters
• CPC Class Codes: A61N 1/378 Electrical supply
• CPC Class Codes: H02J 2310/23 The load being a medical device, a medical implant, or a life supporting device
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

An electrical stimulator system is described incorporating rechargeable batteries and a charging circuit. A charging set and electrode support are alternatively connected to the stimulator system via a single common two-pole terminal. The system is designed to prevent current from flowing directly from the battery to the electrode support along the charging circuit while allowing charge current to flow in the opposite direction along the charging circuit if the charging set is connected to the system instead of the electrode support.

Claims

1. An electrical stimulator system having a rechargeable potential source, said stimulator system coupled to an electrode support provided for receiving a plurality of electrical stimulating bipolar pulses generated by said stimulator system and alternatively to a charging device provided for charging said rechargeable potential source, said stimulator system comprising, generating means for generating a plurality of electrical stimulating bipolar pulses to be received by said electrode support when coupled to said stimulator system, and a charging circuit arranged between said generating means and said rechargeable potential source for connecting said charging device to said rechargeable potential source for charging thereof when said charging device is alternatively coupled to said stimulator system, said charging circuit including a voltage dependent element connected through the parallel combination of an energy storage element and a resistor element between said pulse generating means and said rechargeable potential source and means for preventing communication between said bipolar pulse generated by said generating means and said rechargeable potential source along said charging circuit when said electrode support is coupled to said stimulator system while permitting communication between said rechargeable potential source and said charging device along said charging circuit when said charging device is alternatively coupled to said stimulator system.

2. The electrical stimulator system as set forth in claim 1 wherein said charging circuit further includes a rectifier element arranged between said voltage dependent element and said rechargeable potential source.

3. The electrical stimulator system as set forth in claim 1 or 2 wherein said voltage dependent element remains in a non-conducting state during generation of said stimulating pulses by said pulse generating means.

4. The electrical stimulator system as set forth in claim 1 or 2 wherein said electrode support and said charging device are alternatively coupled to said stimulator system through a common terminal.

5. The electrical stimulator system as set forth in claim 4 wherein said common terminal is connected to said pulse generating means and connected to said rechargeable potential source via said charging circuit.

6. The electrical stimulator system as set forth in claim 1 or 2 wherein said rechargeable potential source comprises a rechargeable battery.

7. An electrical stimulator system comprising a charging circuit, a bipolar pulse generator driven by a rechargeable battery, and stimulator system generating stimulating bipolar pulses transmissible to an electrode support, said electrode support connected to said stimulator system via a terminal, said terminal alternatively connecting a charging set to said stimulator system for charging of said battery along said charging circuit, and pulse transmission prevention means for preventing the transmission of said stimulating bipolar pulses from said bipolar pulse generator to said battery by said charging circuit arranged therebetween while permitting the transmission of energy from said charging set to said rechargeable battery along said charging circuit when said charging set is alternatively connected to said terminal, said pulse transmission preventing means including a resistor and a voltage dependent element operatively arranged in said charging circuit with a capacitor such that said voltage dependent element remains non-conductive during the generation of stimulating pulses by said pulse generator.

8. The electrical stimulator system as set forth in claim 7 wherein said stimulator system, apart from said electrode support and said charging set, is enclosed in a tight housing with a single outlet terminal which preventing alternative common communication with said electrode support and said charging set.

9. The electrical stimulator system as set forth in claim 7 further including a rectifier connected between said battery and said voltage dependent element preventing interference communication therebetween and preventing interference communication between said battery and said electrode support.

10. An electrical stimulator system including a rechargeable potential source having an output at a first potential, said stimulator system be coupled to an electrode support which receives a plurality of electrical stimulating pulses generated by said stimulator system and alternatively to a charging device which charges said rechargeable potential source, said stimulator system comprising generating means for generating a plurality of electrical stimulating pulses at a second potential greater than said first potential received by said electrode support when coupled to said stimulator system, a voltage multiplier arranged between said rechargeable potential source and said generating means said voltage multiplier increasing said first potential of said rechargeable potential source to said second potential of said stimulating pulses, and a charging circuit arranged between said generating means and said rechargeable potential source connecting said charging device to said rechargeable potential source for charging thereof when said charging device is alternatively coupled to said stimulator system, said charging circuit including means for preventing communicating between said pulses generated by said generating means at said second potential and said rechargeable potential source at said first potential along said charging circuit when said electrode support is coupled to said stimulator system while permitting communication between said rechargeable potential source and said charging device along said charging circuit when said charging device is alternatively coupled to said stimulator system.

11. The electrical stimulator system of claim 10 wherein said electrical stimulating pulses are bipolar pulses.

12. The electrical stimulator system of claim 10 wherein said electrode support and said charging device are alternatively coupled to said stimulator system through a common terminal.

13. The electrode stimulator system of claim 10 wherein the preventing means of said charging circuit includes a voltage dependent element connected through the combination of an energy storage element charged through its connection with a resistor element and arranged between said generating means and said rechargeable potential source.