US5081769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter head with flexible stabilizer
Assignee: Cooper Industries LLC
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Filing: 1989-11-20
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Granted: 1992-01-21
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Expires: 2009-11-20
Abstract
Abstract Disclosed is a cutting head, suitable for use in cutting wire or sheet metal. The cutting head includes two jaws, and a cutting blade on each jaw. A spring, which is preferably a split cylinder, is disposed in a hole at the pivot point between the jaws. The spring expands in the hole, forces the jaws apart, and stabilizes the jaws during use while correcting for any minor deviations which occurred in machining of the functional parts of the cutting head. In a preferred embodiment, the two jaws are held together by one or more straps which are bolted to each of the jaws.
Inventors
- 👤 Karel B. F. Juros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:43
CPC Classifications
B; B26; B26B; B26B17/00; B26B17/02; B23; B23D; B23D29/00; B23D29/02; B25; B25B; B25B7/00; B25B7/06; B25B7/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
94 words
A cutting head assembly including two jaws, a cutting blade on each jaw, and a pivot point between the jaws, the improvement comprising: a spring positioned between the jaws and extending around the pivot point; said spring being rigid in a direction parallel to the axis of rotation about the pivot point and engaging each of the jaws, said spring exerting an outward pivoting force on the jaws about the axis of the pivot point toward an open position and resisting the movement of the jaws in a plane other than the pivot plane.
Claim 2
Dependent Claim
94 words
A cutting head assembly including two jaws, a cutting blade on each jaw, and a pivot point between the jaws, the improvement comprising: a spring positioned between the jaws and extending around the pivot point; said spring being rigid in a direction parallel to the axis of rotation about the pivot point and engaging each of the jaws, said spring exerting an outward pivoting force on the jaws about the axis of the pivot point toward an open position and resisting the movement of the jaws in a plane other than the pivot plane.
Claim 3
Dependent Claim
49 words
A cutting head assembly including two jaws, a cutting blade on each jaw, and a pivot point between the jaws, comprising: a spring in the shape of a split cylinder being positioned between the jaws and surrounding the pivot point, said spring exerting an outward force on the jaws.
Claim 4
Dependent Claim
49 words
A cutting head assembly including two jaws, a cutting blade on each jaw, and a pivot point between the jaws, comprising: a spring in the shape of a split cylinder being positioned between the jaws and surrounding the pivot point, said spring exerting an outward force on the jaws.
Claim 5
Dependent Claim
27 words
The cutting head assembly of claim 2 wherein the two jaws are held together by at least one strap which is bolted to each of the jaws.
Claim 6
Dependent Claim
22 words
The cutting head assembly of claim 3 wherein the cutting blades are both located on a first side of the pivot point.
Claim 7
Dependent Claim
47 words
The cutting head assembly of claim 4 wherein the jaws taper away from each other on a second side of the pivot point opposite the first side, and the cutting blades can be pivoted by movement of the jaws on the second side of the pivot point.
Claim 8
Dependent Claim
24 words
The cutting head assembly of claim 5 further including a handle means attached to said second side for increasing the torque closing the jaws.
Claim 9
Dependent Claim
96 words
Wire or sheet metal cutters having mating cutting blades, said cutters being stabilized so as to prevent the cutting blades from undesired movement, comprising: two jaws, a cutting blade on each jaw, and a pivot point between the jaws; and a C-shaped spring made of spring steel and forming a rigid wall extending in a direction parallel to the axis of rotation; said spring extending around the pivot point in engagement with said jaws to exert an outward force on the jaws and resist movement of said jaws in a plane other than the pivot plane.
Claim 10
Dependent Claim
96 words
Wire or sheet metal cutters having mating cutting blades, said cutters being stabilized so as to prevent the cutting blades from undesired movement, comprising: two jaws, a cutting blade on each jaw, and a pivot point between the jaws; and a C-shaped spring made of spring steel and forming a rigid wall extending in a direction parallel to the axis of rotation; said spring extending around the pivot point in engagement with said jaws to exert an outward force on the jaws and resist movement of said jaws in a plane other than the pivot plane.
Claim 11
Dependent Claim
66 words
Wire or sheet metal cutters having mating cutting blades, said cutters being stabilized so as to prevent the cutting blades from undesired movement, comprising: two jaws, a cutting blade on each jaw, and a pivot point between the jaws; and a spring in the shape of a split cylinder accommodated between the jaws and about the pivot point which exerts an outward force on the jaws.
Claim 12
Dependent Claim
66 words
Wire or sheet metal cutters having mating cutting blades, said cutters being stabilized so as to prevent the cutting blades from undesired movement, comprising: two jaws, a cutting blade on each jaw, and a pivot point between the jaws; and a spring in the shape of a split cylinder accommodated between the jaws and about the pivot point which exerts an outward force on the jaws.
Claim 13
Dependent Claim
67 words
Wire or sheet metal cutters having mating cutting blades, said cutters being stabilized so as to prevent the cutting blades from undesired movement comprising: two jaws, a cutting blade on each jaw, and a pivot point between the jaws; a spring extending around the pivot point which exerts an outward force on the jaws; and at least one strap bolted to the jaws to hold them together.
Claim 14
Dependent Claim
67 words
Wire or sheet metal cutters having mating cutting blades, said cutters being stabilized so as to prevent the cutting blades from undesired movement comprising: two jaws, a cutting blade on each jaw, and a pivot point between the jaws; a spring extending around the pivot point which exerts an outward force on the jaws; and at least one strap bolted to the jaws to hold them together.
Claim 15
Dependent Claim
110 words
A cutting head assembly comprising: first and second jaws each having a cutting blade; said jaws having a pivot point whereby said jaws can pivot to an open position with said cutting blades apart and to a closed position with said cutting blades in cutting engagement; a spring having a surface extending in a direction parallel to the axis of rotation about the pivot point, said surface being in contact with said jaws to prevent said jaws from moving in a direction other than around the pivot point, said spring being disposed around said pivot point and in engagement with said jaws to bias said jaws toward said open position.
Claim 16
Dependent Claim
110 words
A cutting head assembly comprising: first and second jaws each having a cutting blade; said jaws having a pivot point whereby said jaws can pivot to an open position with said cutting blades apart and to a closed position with said cutting blades in cutting engagement; a spring having a surface extending in a direction parallel to the axis of rotation about the pivot point, said surface being in contact with said jaws to prevent said jaws from moving in a direction other than around the pivot point, said spring being disposed around said pivot point and in engagement with said jaws to bias said jaws toward said open position.
Claim 17
Dependent Claim
20 words
The cutting head assembly of claim 10 wherein said jaws have arcuate recesses adjacent said pivot point housing said spring.
Claim 18
Dependent Claim
88 words
A cutting head assembly comprising: first and second jaws each having a cutting blade; said jaws having a pivot point whereby said jaws can pivot to an open position with said cutting blades apart and to a closed position with said cutting blades in cutting engagement; a spring disposed around said pivot point and in engagement with said jaws to bias said jaws toward said open positions; said jaws having arcuate recesses adjacent said pivot housing said spring; and said spring having the shape of a split cylinder.
Claim 19
Dependent Claim
88 words
A cutting head assembly comprising: first and second jaws each having a cutting blade; said jaws having a pivot point whereby said jaws can pivot to an open position with said cutting blades apart and to a closed position with said cutting blades in cutting engagement; a spring disposed around said pivot point and in engagement with said jaws to bias said jaws toward said open positions; said jaws having arcuate recesses adjacent said pivot housing said spring; and said spring having the shape of a split cylinder.
Claim 20
Dependent Claim
69 words
A cutting head assembly comprising: first and second jaws each having a cutting blade; said jaws having a pivot point with arcuate recesses around said pivot point; first and second straps disposed over said pivot point on each side of said jaws; a fastener having an eccentric central portion; said fastener passing through aligned apertures in said straps and said eccentric central portion being disposed within said arcuate recesses.
Claim 21
Dependent Claim
69 words
A cutting head assembly comprising: first and second jaws each having a cutting blade; said jaws having a pivot point with arcuate recesses around said pivot point; first and second straps disposed over said pivot point on each side of said jaws; a fastener having an eccentric central portion; said fastener passing through aligned apertures in said straps and said eccentric central portion being disposed within said arcuate recesses.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |