Multi-valve engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 10, 1996
Grant Date -
N/A
app pub date -
Sep 30, 1994
filing date -
Sep 30, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved air spring arrangement for an internal combustion engine having three valves per cylinder which are disposed in surrounding relationship to a spark plug. The air spring arrangement is formed by a recess formed in the cylinder head that encompasses each of the valve stems and an insert piece that is inserted into this recess and which defines the bores for the respective air chambers. The supply and relief passages for the air chambers are formed in the insert piece by drilled passages which have a V-shaped configuration to provide a more compact assembly and a less complicated cylinder head arrangement.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
YAMAHA HATSUDOKI KABUSHIKI KAISHA | IWATA-SHI SHIZUOKA 438-8501 |
International Classification(s)

- 1994 Application Filing Year
- F01L Class
- 145 Applications Filed
- 64 Patents Issued To-Date
- 44.14 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Ochiai, Katsumi | Iwata, JP | 63 | 628 |
# of filed Patents : 63 Total Citations : 628 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 7 Citation Count
- F01L Class
- 0 % this patent is cited more than
- 29 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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