US4297931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double ended metal cleaning shear
Assignee: ECON SCRAP SHEAR Co
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Filing: 1980-01-23
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Granted: 1981-11-03
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Expires: 2000-01-23
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.
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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 |