Cutlery – Cutting tools – Plural cooperating blades
Patent
1987-11-25
1990-02-27
Yost, Frank T.
Cutlery
Cutting tools
Plural cooperating blades
30134, B26B 1500
Patent
active
049034081
ABSTRACT:
A steel plate cutter has a pair of stationary arms arranged with a predetermined gap therebetween, and a movable arm arranged between the stationary arms. An intermediate portion of the movable arm is pivotally supported by the stationary arms. Stationary and movable ends of a hydraulic cylinder are pivotally coupled to the proximal ends of the stationary arms and the movable arm. A pair of base blades that oppose a shearing push blade fixed to the distal end of the movable arm are fixed on the distal ends of the stationary arms. When the movable arm is driven by the hydraulic cylinder to approach and separate from the stationary arms, the shearing push blade of the movable arm enters or escapes from the gap between the base blades of the stationary arms. When the shearing push blade slides between the base blades, it cuts a steel plate in a belt-like strip by coaction with the base blades by a shearing force. The cut strip of the steel plate is bent in a direction away from the steel plate. Therefore, a belt-like space, in which and from which the movable arm can enter and escape, is formed in the steel plate by every cutting operation. When a single cutting operation is completed, the steel plate cutter can smoothly move on the steel plate along the belt-like space while the movable arm faces the belt-like space. As a result, the cutting operation can be easily repeated, and the steel plate can be safely and efficiently cut.
REFERENCES:
patent: 3731577 (1973-05-01), Swint, Jr.
patent: 4519135 (1985-05-01), LaBounty
patent: 4541177 (1985-09-01), Hollander
patent: 4543719 (1985-10-01), Pandoe
Kanno Samon
Tagawa Itsuo
Fridie Jr. Willmon
Sangojuuki Co., Ltd.
Yost Frank T.
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