Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1988-03-18
1989-05-23
Echols, P. W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
72 82, 72 68, B21K 142
Patent
active
048317055
ABSTRACT:
A method of manufacturing a sheet metal poly-V pulley including forming a tubular peripheral wall integrally from the peripheral edge of bottom wall and forming poly-V grooves in the peripheral wall at specified pitches, in which a bent part is formed in the bottom wall in an annular form concentric with the axial center of the peripheral wall and bulging out in a convex form toward the opening side of the peripheral wall. The load from the poly-V belt which may cause plastic deformation of the sheet metal poly-V pulley is absorbed by this bent part, so that the increase of material cost, difficulty in forming, and increase of weight due to increase of the thickness of the blank of sheet metal poly-V pulley in order to enhance the strength may be avoided.
REFERENCES:
patent: 2493053 (1950-01-01), Zatyko
patent: 4524595 (1985-06-01), Oda
patent: 4633557 (1987-01-01), Kanemitsu
Echols P. W.
Kabushiki Kaisha Kanemitsu
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