Metal deforming – With means to drive tool – With means to permit tool positioning
Patent
1988-05-20
1989-11-07
Jones, David
Metal deforming
With means to drive tool
With means to permit tool positioning
72455, 72456, 100214, 100228, B21J 1300
Patent
active
048783749
ABSTRACT:
A five bar articulating mechanism having the bars pivotally linked one to another forming a closed loop. Any one of the bars is intermittently rigidly joined to an adjacent bar to convert the five bar mechanism to a four bar mechanism.
REFERENCES:
patent: 3154009 (1964-10-01), Dewyer
patent: 3470728 (1969-10-01), Polidori
patent: 3641924 (1972-02-01), Ballard
patent: 3651754 (1972-03-01), Forest
patent: 4329867 (1982-05-01), Nelson
patent: 4580436 (1986-04-01), Nelson
patent: 4580437 (1986-04-01), Laviano
patent: 4643017 (1987-02-01), Nelson
patent: 4706490 (1987-11-01), Zeitlin et al.
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