Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1979-04-09
1981-02-10
Watson, Robert C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29263, B23P 1904
Patent
active
042492939
ABSTRACT:
A pulling tool of generally elongated shape operable by hydraulic pressure to pull force-fitted elements from an anchorage, such as cups from the arms of universal joints. At the forward end there is a gripping sleeve to be located around the element, a retaining sleeve to be located about the gripping sleeve and a reaction sleeve around the retaining sleeve. Interaction of the walls of the gripping sleeve and retaining sleeve cause transverse contraction of the gripping sleeve about the element as the hydraulic pressure pulls the gripping sleeve rearwardly. An ejector pin urges the element longitudinally from the tool after the arms constituting the gripping sleeve open, which occurs due to differing radial forces applied on the gripping sleeve as it moves rearwardly. The leading edge of the reaction sleeve reacts against the anchorage from which the element is pulled.
REFERENCES:
patent: 2050005 (1936-08-01), Heegeman
patent: 2797889 (1957-07-01), Talboys
patent: 4059883 (1977-11-01), Osborne
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