Bending machine

Details Bending machine Bending machine

1987-05-01

1988-11-08

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

Plural or complex apparatus

72217, 72388, 7245301, 72294, 137580, B21D 7024, B21D 4300

Patent

active

047826843

ABSTRACT:
A bending machine having a rotary bending head to which fluid pressure is transmitted via a fluid flow or fluid pressure transmission device comprising a fixed block and a rotary shaft mounted in relation to the fixed block so as to be rotatable relative thereto. The fixed block has at least one passageway through it extending to the rotary shaft, and the rotary shaft has at least one annular groove in registration with the fixed block passageway and at least one axially extending passageway in communication with the annular groove. As a result, the axial passageway is in communication with the fixed block passageway independently of the angular position of the rotary shaft relative to the fixed block.

REFERENCES:
patent: 2254192 (1941-08-01), White
patent: 2313438 (1943-03-01), Hoelscher
patent: 3776270 (1973-12-01), Wanger
patent: 3908695 (1975-09-01), Dunbar
patent: 4252147 (1981-02-01), Gerber et al.
patent: 4555924 (1985-12-01), Remy et al.
patent: 4665731 (1987-05-01), Yagi et al.

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