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US 4,232,242 AGranted
Sparking plug with efficient air supplying system and a removable sitting device
OwnerYun T. Hsuinventor
Life of this patent
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Abstract
A spark plug including an air supplying system which supplies enough air to an internal-combustion engine to promote the required degree of combustion of the fuel in the engine and produces little carbon which might block the ventilation of air. The air supply system includes a removable filtering device for eliminating dust.
Claims6
A spark plug comprising:
- a central ceramic insulator holding an electrode;
- said electrode extending to an end terminal;
- a medium body portion surrounding said insulator;
- an annular air tunnel terminating at said end terminal being formed between said medium body portion and said insulator;
- a protection sheath surrounding said medium body portion so as to form an annular air chamber between said sheath and said medium body portion, said sheath having openings therein for receiving air into said chamber;
- a plurality of holes formed in said medium body portion each extending from said air chamber to said tunnel;
- a cylindrical mesh filter within said protection sheath for filtering air to said plurality of holes;
- and
- a plurality of unidirectional flow inlet valves, one each received in each of said holes for directing air flow between said chamber and said tunnel toward said end terminal.
6 more elements
Dependencies are inferred from the claim text.