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US4058915A Expired / Lapsed US ⏱️ 0.0 years remaining

Backhoe-mounted shear

Assignee: WITTWER CONSTRUCTION Co
•
Filing: 1976-06-08
•
Granted: 1977-11-22
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Expires: 1996-06-08
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Abstract

Abstract The device comprises a shear adapted to be mounted to the boom of a backhoe or like machinery with relatively movable members and be actuated by a powered, movable member of the backhoe. The shear comprises a generally U-shaped support member adapted to be disposed about the top of the backhoe boom. The shear also includes a pivotally mounted cutter head adapted to engage an anvil section attached to the support member to shear an item such as a metal member inserted therebetween. A cutter head is actuated by the backhoe movable member and is pivotally returned to a raised position after a shearing operation by a biasing means connected to the cutter head. The invention also includes a locking means to maintain the cutter head in a closed position when a shearing operation is not desired; a stripping member disposed adjacent the anvil section to assist in restraining items to be sheared during a shearing operation; and a guide member for preventing excessive deflection of the cutter head during a shearing operation.

Inventors

  • 👤 Leon M. Hake

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 23:58
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/965; E01; E01C; E01C23/00; E01C23/04; Y; Y10; Y10S; Y10S414/00; Y10S414/125; Y10S83/00; Y10S83/928; Y10T; Y10T83/00; Y10T83/929; Y10T83/9309

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 50 words
A shearing apparatus, comprising, in combination: a. a shear having a cutting head; and b. a backhoe having a backhoe dipstick on a backhoe boom, said shear being mounted on one of said boom and dipstick and said cutter head being actuated by the other of said boom and dipstick.
Claim 2
Dependent Claim 50 words
A shearing apparatus, comprising, in combination: a. a shear having a cutting head; and b. a backhoe having a backhoe dipstick on a backhoe boom, said shear being mounted on one of said boom and dipstick and said cutter head being actuated by the other of said boom and dipstick.
Claim 3
Dependent Claim 52 words
The apparatus of claim 1, wherein: a. said cutter head is pivotally mounted to said shear; and b. said shear additionally includes an anvil section, said anvil section being rigidly affixed to a portion of said shear and adapted to be engaged by said cutter head to carry out a shearing operation.
Claim 4
Dependent Claim 35 words
The apparatus of claim 2, wherein said shear additionally includes a biasing means for said cutter head, said biasing means acting to urge said cutter head to a raised position relative to said anvil section.
Claim 5
Dependent Claim 47 words
The apparatus of claim 3, wherein said shear additionally includes a locking means for said cutter head, said locking means acting to hold said cutter head in a lowered position relative to said anvil section against the force exerted on said cutter head by said biasing means.
Claim 6
Dependent Claim 62 words
The apparatus of claim 4, wherein: a. said biasing means comprises a spring affixed at one end to a stationary portion of said apparatus and affixed at the other end to a portion of said cutter head; and b. said locking means comprises a fastener affixed to a portion of said cutter head and engagement with a stationary portion of said apparatus.
Claim 7
Dependent Claim 41 words
The apparatus of claim 2, wherein a guide member is included as part of said shear, said guide member slideably engaging a portion of said cutter head and serving to prevent excessive deflection of said cutter head during a shearing operation.
Claim 8
Dependent Claim 25 words
The apparatus of claim 2, wherein: a. said cutter head includes a replaceable blade element; and b. said anvil section includes a replaceable blade element.
Claim 9
Dependent Claim 26 words
The apparatus of claim 2 wherein said shear additionally includes a stripping member disposed proximate said anvil section and spaced therefrom in a generally parallel relationship.

References Cited (Backward Citations)

US1438888A Cited
US1777032A Cited
US2044624A Cited
US2144540A Cited
US2281877A Cited
US2332561A Cited
US3195387A Cited
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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) 1980-11-21 1981-05-23 1981-11-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-11-21 1985-05-23 1985-11-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-11-21 1989-05-23 1989-11-22 $7700.00 Window Closed / Lapsed

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