Rechargeable hand held vacuum cleaner with electrical connections circuit board with spring contacts

• US 5,869,947 A
• Filed: 01/13/1995
• Issued: 02/09/1999
• Est. Priority Date: 01/13/1995
• Status: Expired due to Term

• Current Assignee: Royal Appliance Manufacturing Company (Techtronic Industries Company Limited)
• Original Assignee: Royal Appliance Manufacturing Company (Techtronic Industries Company Limited)
• Inventors: Salo, Robert A., Stephens, Paul D., Zahuranec, Terry L., Vystrcil, Robert A.
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): TOATLEY, GREGORY J
• Application Number:
  US08/372,659
• Time in Patent Office: 1,488 Days
• Field of Search: 320/2, 15/DIG. 1, 30/DIG. 1, 339/119 C, 361/785
• US Class Current: 320/115
• CPC Class Codes: A47L 5/24 Hand-supported suction cleaners
• CPC Class Codes: A47L 9/2873 Docking units or charging stations for autonomous or robotic vacuum cleaners A47L2201/02
• CPC Class Codes: A47L 9/2884 Details of arrangements of batteries or their installation
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A rechargeable cordless vacuum cleaner system comprises a hand held vacuum cleaner and a separable charger. The cleaner includes a circuit board assembly having first and second sets of contacts disposed for engagement to first and second sets of mating contacts of a battery pack and the charger. Both sets of contacts are spring loaded for resilient engagement to the mating contacts. A pocket portion is formed adjacent the set of contacts to the charger to avoid direct exposure of the contacts to an operator of the cleaner.

Claims

1. A rechargeable cordless vacuum cleaner system comprising a hand-held vacuum cleaner and a separable charger,

wherein the cleaner includes a circuit board having first and second sets of electrical contacts for communicating electrical energy from a battery pack to a motor in the vacuum cleaner and from the charger to the battery pack during recharging, respectively, and circuit means for communicating the electrical energy from the second set of contacts to the first set of contacts, the first set of contacts being disposed to engage rechargeable battery pack contacts when the battery pack is received in the cleaner, and the second set of contacts being disposed to engage contacts of the charger for recharging the battery pack when the cleaner is received in the charger, the first and second sets of electrical contacts both comprising spring contacts for avoiding wiring harness connections to the battery pack and the charger;

and,

further including means for precluding an electrical short of the battery contacts during the recharging.

2. The system as defined in claim 1 wherein the cleaner includes a pocket adjacent the second set of contacts to receive the contacts of the charger when the cleaner is received therein and hold both the second set of contacts and the charger contacts in a proper position for the recharging.

3. The system as defined in claim 2 wherein the pocket includes an outer wall disposed to cover and preclude direct exposure of the second set of contacts.

4. The system as defined in claim 1 wherein the second set of contacts are configured to form a cantilever spring that wipe and clean the contacts of the charger as the cleaner is received in the charger.

5. The system as defined in claim 1 wherein the circuit board comprises a panel member wherein the first set of contacts are on a first side of the panel member and the second set of contacts are on a second side of the panel member, the first and second set of contacts being configured of first and second common conductive elements, respectively, the second set of contacts being configured to pass through the panel member from the first side to the second side.

6. The system as defined in claim 5 wherein the circuit board is disposed adjacent an outer wall of the cleaner, said outer wall including a cut-out to receive the second set of contacts and wherein the second set of contacts are sized to extend through the outer wall for ready engagement of the contacts of the charger.

7. The system as defined in claim 5 wherein the first set of contacts deflect away from the panel member for ready engagement of the battery contacts and are each in electrical series with wire leads going to the motor and a switch.

8. The system as defined in claim 1 wherein the cleaner comprises first and second housing halves, each of the housing halves including wall slots to closely receive the circuit board for securing the circuit board in the cleaner upon fastening the housing halves together.