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(12) Patent: | (11) CA 1182891 |
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(21) Application Number: | 1182891 |
(54) English Title: | DEVICE FOR PREVENTING RADIO FREQUENCY INTERFERENCE FROM SPARK PLUG |
(54) French Title: | DISPOSITIF POUR LA PREVENTION DES PARASITES RADIO ENGENDREES POUR LES BOUGIES D'ALLUMAGE |
Status: | Term Expired - Post Grant |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | GOWLING WLG (CANADA) LLP |
(74) Associate agent: | |
(45) Issued: | 1985-02-19 |
(22) Filed Date: | 1981-10-08 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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ABSTRACT OF THE DISCLOSURE:
A device for preventing radio frequency inter-
ference generated by spark plug of internal combustion
engines. The device includes a cover member adapted to
cover at least a part of the high-voltage portion of
the spark plug such as high-tension cord together with
the end of the plug connected to the cord. The cover
member is made of a highly soft, flexible and electrically
conductive rubber material (high molecular compound).
The cover member is grounded through a grounding line
to the body of the engine. This device is suitable for
use in machines having limited space for mounting the
radio frequency interference prevention device, such as
chain saw having an internal combustion engine.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 1182891 was not found.
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Description | Date |
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Inactive: Expired (old Act Patent) latest possible expiry date | 2002-02-19 |
Grant by Issuance | 1985-02-19 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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KIORITZ CORPORATION |
Past Owners on Record |
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ISAO MASUDA |
TADASHIGE KONDO |