Device for the alternate positioning of the blade edge in a cutt

Details Device for the alternate positioning of the blade edge in a cutt Device for the alternate positioning of the blade edge in a cutt

1988-01-19

1989-04-25

Yost, Frank T.

Cutting

Means to drive or to guide tool

Means to change datum plane of tool or tool presser stroke

83563, 83639, 83856, B26D 102

Patent

active

048236659

ABSTRACT:
The device for positioning the blade cutting edge and intermittently lowering the blade cutting edge includes: a fixed structure comprising two chambers and a central moving rod; two pistons with stems, the pistons moving within the chambers. One of the pistons is opposed by a spring. The blade carrier is hinged at the end of the moving rod and is fixed to the piston stem opposed by the spring and slides along the stem of the other piston. Pressurized fluid is introduced into the chambers by a line provided with a first valve. A second valve intermittently varies the pressure applied to the piston opposed by the spring.

REFERENCES:
patent: 3054317 (1962-09-01), Castle, Jr.
patent: 3094889 (1963-06-01), Elsas
patent: 4094217 (1978-06-01), Exline
patent: 4422359 (1983-12-01), Leboeuf
patent: 4505172 (1985-03-01), De Guchi

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