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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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US Patent 4421081 - Spark-ignition internal combustion engine
US Patent Issued on December 20, 1983
Estimated Patent Expiration Date:
February 9, 2001Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
February 9, 2001Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA spark-ignition internal combustion engine having a combustion chamber, comprises intake and exhaust valves disposed on a cylinder head wall surface and positioned generally symmetrical with each other with respect to the center axis of the bore of an engine cylinder, at least first and second squish areas which are located respectively in first and second sections of the combustion chamber which sections are defined by dividing the combustion chamber into two by a first vertical plane containing the centers of the intake and exhaust valves, and a spark plug whose tip section is disposed on the cylinder head wall surface and positioned in said first section of the combustion chamber thereby enabling use of high compression ratio without causing engine knock.Other References
| InventorsAssigneeApplicationNo. 06/232858 filed on 02/09/1981US Classes:123/310, COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS123/661Having squish areaField of Search123/310, COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS123/657, COMBUSTION CHAMBER123/661Having squish areaExaminersPrimary: Feinberg, Craig R.Attorney, Agent or FirmUS Patent References2718221, 4144860, Dual spark plug ignition engineIssued on: 03/20/1979 Inventor: Muranaka , et al.4202306, Multi-point spark ignition engine provided with exhaust recirculation circuit Issued on: 05/13/1980 Inventor: Nakajima , et al.4296720Combustion chamber of an internal combustion engine Issued on: 10/27/1981 Inventor: Nakanishi , et al. International ClassesF02F 1/24 (20060101)F02B 23/08 (20060101) F02P 15/00 (20060101) F02P 15/02 (20060101) F02B 1/00 (20060101) F02B 1/04 (20060101) Foreign Application Priority Data1980-02-12 JP |
