Capacitor

Details Capacitor Capacitor

2001-11-07

2003-04-22

Dinkins, Anthony (Department: 2831)

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

C361S306100, C361S306300, C361S301500, C361S308200

Reexamination Certificate

active

06552893

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a capacitor for use with electrical equipment for such purposes as operating a motor, improving a power factor, charging and discharging, and smoothing.
BACKGROUND OF THE INVENTION
As shown in
FIG. 9
, typical capacitor
101
comprises capacitor case
102
formed of plastics, capacitor element
106
having terminals
104
for external connection connected thereto, and filling resin injected into the gaps between capacitor case
102
and capacitor element
106
and cured. Conventionally, in order to incorporate capacitor
101
into electrical equipment, attaching sections
103
unitarily molded with capacitor case
102
have been provided at the bottom of capacitor case
102
. Attaching sections
103
are provided in horizontal relationship with the attaching plane. Moreover, capacitor
101
is fixed by attaching attaching sections
103
to attachment
105
made of a metal plate, resin plate, wood and the like, using screws
107
, as shown in FIG.
10
. Fixing using screws
107
is not only made at one point, but also may be made at a plurality of points as required.
In the above-mentioned conventional structure, however, fixing using screws
107
is necessary when capacitor case
101
is attached to attachment
105
. This poses a problem of requiring excessive time and man-hours, or more manufacturing cost in the process of assembling electrical equipment to which capacitor
101
is incorporated. Especially when the attaching screw is different from screws for other components, the number of screw types is increased. Therefore, the burden on the personnel is increased in manufacturing and controlling the equipment.
In addition, because change of screws involves change of screwdriver heads in operations, a large number of screw types increase the frequency of troublesome operations for the exchange of the screwdriver heads. Thus labor effectiveness is considerably decreased.
In turn, similar troublesome operations are required when the capacitor is removed.
Conventionally, elimination of the screwing step has strongly been requested from the demands on designing electrical equipment, reducing manufacturing cost, simplifying the manufacturing process, and the like.
In addition, because the terminals are exposed with conventional capacitors, entry of such contaminants as water and dust may lead to corrosion and imperfect contact of the terminals when the capacitors are operated in bad environment such as high temperature and high humidity. For these reasons, improvements for preventing these problems are desired.
The present invention is directed to address such problems.
SUMMARY OF THE INVENTION
A capacitor in accordance with the present invention comprises a capacitor element, a case for housing the capacitor element, and a fixing section having projections for attaching the case to electrical equipment. In an exemplary embodiment of the present invention, the case and the fixing section are unitarily molded. The fixing section and capacitor case are formed of flame-resistant thermoplastic resins as required.
A capacitor in accordance with the present invention also has an adapter as an exemplary embodiment of the fixing section and the adapter has at least one projection. As an exemplary embodiment of the adapter, the adapter is integrated with a case by adhesion, welding or fitting.


REFERENCES:
patent: 4757414 (1988-07-01), Barker et al.
patent: 5019934 (1991-05-01), Bentley et al.
patent: 5381301 (1995-01-01), Hudis
patent: 5412532 (1995-05-01), Nishimori et al.
patent: 5805411 (1998-09-01), Anderson
patent: 6233133 (2001-05-01), Weng
patent: 11186091 (1999-07-01), None

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