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US4297931A Expired / Lapsed US ⏱️ 0.0 years remaining

Double ended metal cleaning shear

Assignee: ECON SCRAP SHEAR Co
•
Filing: 1980-01-23
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Granted: 1981-11-03
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Expires: 2000-01-23
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Abstract

Abstract A metal cleaning shear is provided for shearing metals and other material wherein there is provided a rocking pivoted beam, a pivotally mounted guard, hydraulic cylinder means, cutting blades, and a control for the hydraulic means and machine.

Inventors

  • 👤 Kenneth R. Lessard

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 22:38
CPC Classifications
B; B23; B23D; B23D31/00; B23D17/00; B23D17/02; B23D17/06; Y; Y10; Y10S; Y10S83/00; Y10S83/01; Y10T; Y10T74/00; Y10T74/21; Y10T74/2193; Y10T74/2194; Y10T83/00; Y10T83/606; Y10T83/869; Y10T83/872; Y10T83/8798; Y10T83/8799; Y10T83/8801

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 198 words
In a double ended metal cleaning shear, a horizontally disposed bed, a rocking beam pivotally and rockably mounted on said bed, recessed blades on each end of said bed, shearing blades on both ends of said rocking beam matching and coacting with the recessed blades of the bed, a hydraulic power unit operatively connected to said beam for selectively causing shearing action between the blades on the beam and the blades on the bed, foot control pedal means for controling said hydraulic power unit, and a single safety guard rockably mounted on said pivoted beam, and wherein the safety guard can be rocked to completely guard blades on one end while providing a working space guard on blades on the opposite end, and wherein the safety guard can be rocked to another position to completely guard the other end blades while leaving a working space guard on the first named blades, and wherein the hydraulic power unit includes a cylinder for operating the cutting stroke of the blades on one end when the cylinder moves in one direction and operates the cutting stroke of the blades on the opposite end when the cylinder moves on the returning stroke.
Claim 2
Dependent Claim 198 words
In a double ended metal cleaning shear, a horizontally disposed bed, a rocking beam pivotally and rockably mounted on said bed, recessed blades on each end of said bed, shearing blades on both ends of said rocking beam matching and coacting with the recessed blades of the bed, a hydraulic power unit operatively connected to said beam for selectively causing shearing action between the blades on the beam and the blades on the bed, foot control pedal means for controling said hydraulic power unit, and a single safety guard rockably mounted on said pivoted beam, and wherein the safety guard can be rocked to completely guard blades on one end while providing a working space guard on blades on the opposite end, and wherein the safety guard can be rocked to another position to completely guard the other end blades while leaving a working space guard on the first named blades, and wherein the hydraulic power unit includes a cylinder for operating the cutting stroke of the blades on one end when the cylinder moves in one direction and operates the cutting stroke of the blades on the opposite end when the cylinder moves on the returning stroke.
Claim 3
Dependent Claim 36 words
The structure as defined in claim 1 wherein the cutting blades are interchangeably mounted, and wherein the blades have threaded holes, and screw members extending into said holes and maintaining the blades in the assembled relation.
Claim 4
Dependent Claim 61 words
The structure as defined in claim 2 wherein the foot control pedal means includes a rocking foot control which when rocked in one direction causes cutting motion, and when rocked in the opposite direction also causes cutting motion wherein the foot control centers and stops all shearing motion whenever the operator removes his foot from the control pedal of the machine.

References Cited (Backward Citations)

US1575325A Cited
US1658151A Cited
US2050619A Cited
US2401808A Cited
US2400639A Cited
US3169433A Cited
US3398772A Cited
US3701276A Cited
US3866522A Cited
US4078451A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-11-02 1985-05-04 1985-11-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-11-02 1989-05-04 1989-11-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-11-02 1993-05-04 1993-11-03 $7700.00 Window Closed / Lapsed

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