Heavy duty shear with anti-jam feature

Details Heavy duty shear with anti-jam feature Heavy duty shear with anti-jam feature

1994-02-03

1996-08-06

Rada, Rinaldi I.

Cutlery

Combined cutlery or combined with ancillary feature

With material-holder or disposal

30228, B23D 1700

Patent

active

055421806

ABSTRACT:
A heavy duty shear attachable to the boom of an excavator comprises a fixed lower jaw and a movable upper jaw driven by a hydraulic cylinder. To overcome jams, the cylinder is provided with hydraulic fluid at a higher pressure in the open direction than in the close direction.

REFERENCES:
patent: 3837076 (1974-09-01), Good, Jr.
patent: 4258609 (1981-03-01), Conway
patent: 4392263 (1983-07-01), Amoroso
patent: 4903408 (1990-02-01), Tagawa et al.
patent: 5060378 (1991-10-01), LaBounty et al.
patent: 5230151 (1993-07-01), Kunzman et al.
patent: 5243761 (1993-09-01), Sullivan et al.

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