Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1991-01-23
1993-01-12
Watson, Robert C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29233, B23P 1904
Patent
active
051778491
ABSTRACT:
The brake shoe rivet press is for removing in a single operation rivets which are arranged in rows to hold a fibrous liner to the base of a brake shoe to thereby permit removal and later replacement of the liner. The press has a frame and a punch holder fixedly carried by the frame. The punch holder has a plurality of movable punches also arranged in rows and corresponding in number to the number of rivets in the brake shoe. The press includes upper and lower rams movably carried by the frame on opposite sides of the punch holder. The lower ram is provided with a support surface for positioning and supporting the brake shoe and also includes a plurality of openings arranged in rows for receiving the spent rivets. The upper ram has an operating surface, which, when the upper ram is actuated, engages the punches so as to urge them against the rivets to remove them from the brake shoe in a single operation. A hydraulic circuit is provided for controlling the movements of the upper and lower rams. In a further embodiment, the upper ram has two strokes, with a first removing rivets from a center of the arc, and a second stroke which removes all of the rivets.
REFERENCES:
patent: 1717130 (1929-06-01), Weaver et al.
patent: 2491119 (1949-12-01), Lewis
patent: 2662960 (1953-12-01), Williams
patent: 4065843 (1978-01-01), Elola
patent: 4586359 (1986-05-01), Parks
patent: 5008995 (1991-09-01), Johnson
Gossett Dykema
Muskegon Automation Equipment, Inc.
Watson Robert C.
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