Vacuum cleaner with shielded electronic control module

Details Vacuum cleaner with shielded electronic control module Vacuum cleaner with shielded electronic control module

1988-07-25

1989-04-04

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

361118, 361212, A47L 928

Patent

active

048172340

ABSTRACT:
A vacuum cleaner includes an operating handle having a compartment for containing a shielded electronic control module for operational control of the vacuum cleaner. The electronic control module includes a touch sensitive outer surface exposed in an opening of the compartment so that a user can effect control of the vacuum cleaner by touching a faceplate or keyboard to actuate touch sensitive components such as switches mounted on a circuit board behind the faceplate. A first shielding peripheral side wall is integrally joined to the faceplate surrounding the circuit board and a second peripheral side wall is formed around the circuit board in a nested, overlapping abutting relationship to the first side wall to establish an elongate electrical creep path between a touch point on the outer surface of the faceplate and a point or surface of a different electrical potential associated with one or more of the electrical components on the circuit board. The elongate electrical creep path is of sufficient length to minimize the possibility of an electrical breakdown due to a high voltage static electric charge. A close fitting tight seal is provided between abutting overlapping surfaces of the nested side walls to minimize or prevent the ingress of environmental contaminants between the side walls, the presence of which contaminants would otherwise reduce the effective length of the electrical creep path.

REFERENCES:
patent: 4404615 (1983-09-01), Dep
patent: 4426675 (1984-01-01), Robinson et al.
patent: 4564880 (1986-01-01), Christ et al.
patent: 4715085 (1987-12-01), Johanson
patent: 4715086 (1987-12-01), Johanson et al.

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