Method of bevelling port openings in cylinders for two-cycle eng

Details Method of bevelling port openings in cylinders for two-cycle eng Method of bevelling port openings in cylinders for two-cycle eng

1978-09-11

1980-11-18

Crane, Daniel C.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29557, 295276, 295277, 123 65A, B23P 1300, B23P 1500

Patent

active

042337178

ABSTRACT:
A method of bevelling the peripheral edges of port openings on the inner wall of cylinders for two-cycle engines. At least the upper and lower edges of the port opening on the inner wall of a cylinder are shaped, in advance when casting the cylinder, into concavities arcuately recessed in both axial and radial directions of the cylinder. The boundary edges between the recessed concavities and the inner wall of the cylinder are lightly bevelled by pressing or grinding so that an excellent workability, mass-productivity, and great precision can be attained.

REFERENCES:
patent: 2331554 (1943-10-01), Irgens
patent: 2560700 (1951-07-01), Pervier
patent: 2736300 (1956-02-01), Flynn, Jr.
patent: 3038457 (1962-06-01), Garofali
patent: 3389454 (1968-06-01), Sattler
patent: 3542000 (1970-11-01), Ellingsen
patent: 3657078 (1972-04-01), Schweikher
patent: 3800386 (1974-04-01), Bishop
patent: 4121552 (1978-10-01), Mithuo et al.

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