US4208792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing tool
Assignee: Parker Manufacturing Co
•
Filing: 1978-10-10
•
Granted: 1980-06-24
•
Expires: 1998-10-10
Abstract
Abstract A shearing tool comprising a fixed blade and a movable blade which is driven toward the fixed blade in a straight line within a shear plane.
Inventors
- 👤 John F. Ewig, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:39
CPC Classifications
B; B23; B23D; B23D29/00; B23D29/002
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
A shearing tool, comprising: (a) a housing (b) a first shear member having a tubular portion fixed to the housing and an extending portion provided with a first cutting edge spaced from the tubular portion and located within a shear plane, (c) a second shear member slidably mounted within the tubular portion of the first shear member and having an extending portion provided with a flat surface within said shear plane and a slot extending generally transverse to said shear plane and intersecting said flat surface to form a second cutting edge within said shear plane, said second shear member being movable along a straight axis within said shear plane from an open position at which the second cutting edge is spaced from and opposes the first cutting edge to a closed shearing position at which the first cutting edge meets the second cutting edge, said slot being always spaced from said tubular portion, and (d) actuating means for moving the second shear member between the said open and closed position.
Claim 2
Dependent Claim
171 words
A shearing tool, comprising: (a) a housing (b) a first shear member having a tubular portion fixed to the housing and an extending portion provided with a first cutting edge spaced from the tubular portion and located within a shear plane, (c) a second shear member slidably mounted within the tubular portion of the first shear member and having an extending portion provided with a flat surface within said shear plane and a slot extending generally transverse to said shear plane and intersecting said flat surface to form a second cutting edge within said shear plane, said second shear member being movable along a straight axis within said shear plane from an open position at which the second cutting edge is spaced from and opposes the first cutting edge to a closed shearing position at which the first cutting edge meets the second cutting edge, said slot being always spaced from said tubular portion, and (d) actuating means for moving the second shear member between the said open and closed position.
Claim 3
Dependent Claim
21 words
A shearing tool as recited in claim 1, wherein the shear plane bisects the tubular portion of the first shear member.
Claim 4
Dependent Claim
39 words
A shearing tool as recited in claim 1, wherein the extending portion of the first shear member is provided with a flat surface within the shear plane in sliding contact with the flat surface of the second shear member.
Claim 5
Dependent Claim
27 words
A shearing tool as recited in claim 1, wherein the second cutting edge faces toward the housing and the second cutting edge faces away from the housing.
Claim 6
Dependent Claim
43 words
A shearing tool as recited in claim 1, wherein the first cutting edge extends at an angle with respect to the second cutting edge within the shear plane, so that the first and second cutting edges diverge toward the bottom of the slot.
Claim 7
Dependent Claim
58 words
A shearing tool as recited in claim 1, wherein the first shear member is provided with a flat surface within said shear plane and a slot that extends generally transverse to said shear plane, so that the first cutting edge is formed where the flat surface and one side defining the slot of the first shear member intersect.
References Cited (Backward Citations)
US2257245A
Cited
US2329387A
Cited
US2542103A
Cited
US2714250A
Cited
US3058214A
Cited
US3837077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |