US4534255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing machine for metal sheet having blades at right angles consisting of mutually movable segments
Assignee: Salvagnini SpA
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Filing: 1983-05-24
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Granted: 1985-08-13
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Expires: 2003-05-24
Abstract
Abstract A shearing machine for metal sheets having a pair of upper mobile and lower stationary cooperating blades, each blade having two segments mounted perpendicular to each other. The two segments at right angles of the mobile blade are movable independently either with respect to each other or with respect to the common support so that, in turn each segment is able to execute cut strokes of different lengths in order selectively to engage one and/or the other of the segments. Each of them is able to execute cuts longer than its own longitudinal extension.
Inventors
- 👤 Guido Salvagnini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:25
CPC Classifications
B; B23; B23D; B23D15/00; B23D15/002; B23D15/06; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8696; Y10T83/87; Y10T83/8748; Y10T83/8821; Y10T83/8828; Y10T83/8831; Y10T83/8857; Y10T83/929; Y10T83/9411; Y10T83/9447
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
A shearing machine for sheet metal comprising upper and lower cooperating blades positioned for shearing action therebetween, each blade having two perpendicular segments, the lower blade being carried by a stationary support and the two upper blade segments being carried by a single vertically reciprocating support, wherein each segment of the upper blade is movably connected to said single reciprocating support so as to be selectively independently displaceable with respect to the other segment and to said reciprocating support in order to vary the vertical distance of the selected segment from the lower blade and selectively to remove said selected segment from the shearing action.
Claim 2
Dependent Claim
105 words
A shearing machine for sheet metal comprising upper and lower cooperating blades positioned for shearing action therebetween, each blade having two perpendicular segments, the lower blade being carried by a stationary support and the two upper blade segments being carried by a single vertically reciprocating support, wherein each segment of the upper blade is movably connected to said single reciprocating support so as to be selectively independently displaceable with respect to the other segment and to said reciprocating support in order to vary the vertical distance of the selected segment from the lower blade and selectively to remove said selected segment from the shearing action.
Claim 3
Dependent Claim
20 words
A shearing machine according to claim 1, wherein said segments of the upper blade are displaceable along respective inclined paths.
Claim 4
Dependent Claim
25 words
A shearing machine according to claim 1, wherein driving means are provided for imparting to said reciprocating support selectively alternated shorter and longer vertical strokes.
Claim 5
Dependent Claim
130 words
A shearing machine for sheet metal comprising: upper and lower blades positioned for shearing action therebetween, each blade comprising two segments with the segments of each blade being generally perpendicular to each other so as to form two generally "L" shaped blades; means supporting the lower blade in a stationary position and a single common moveable support for both segments of the upper blade supporting them for generally vertical movement toward and away from the lower blade; means for moving each of the segments of the upper blade vertically in relation to said common support so that upon movement of said common support toward said stationary lower blade, either or both of said upper blade segments will be positioned for shearing action with the corresponding segment of the lower blade.
Claim 6
Dependent Claim
130 words
A shearing machine for sheet metal comprising: upper and lower blades positioned for shearing action therebetween, each blade comprising two segments with the segments of each blade being generally perpendicular to each other so as to form two generally "L" shaped blades; means supporting the lower blade in a stationary position and a single common moveable support for both segments of the upper blade supporting them for generally vertical movement toward and away from the lower blade; means for moving each of the segments of the upper blade vertically in relation to said common support so that upon movement of said common support toward said stationary lower blade, either or both of said upper blade segments will be positioned for shearing action with the corresponding segment of the lower blade.
Claim 7
Dependent Claim
17 words
The machine of claim 4 in which the common support is moved by a fluid operated cylinder.
Claim 8
Dependent Claim
33 words
The machine of claim 4 in which the means for moving each of the segments of the upper blade is a fluid operated cylinder connected to move the blade for vertical movement thereof.
Claim 9
Dependent Claim
51 words
The machine of claim 4 in which the segments of the upper blade each have an inclined edge bearing against a surface of the common support and each segment has associated means for movement of the segment along its length with the inclined edge moving in relation to its bearing surface.
Claim 10
Dependent Claim
19 words
The machine of claim 7 in which the means for movement of the segment is a fluid operated cylinder.
Claim 11
Dependent Claim
23 words
The machine of claim 4 including means for operating the common moveable support over a short vertical stroke and a long vertical stroke.
Claim 12
Dependent Claim
147 words
A shearing machine for sheet metal comprising: upper and lower blades positioned for shearing action therebetween, each blade comprising two segments with the segments of each blade being generally perpendicular to each other so as to form two generally "L" shaped blades; means supporting the lower blade in a stationary position and a single common vertically moveable support for both segments of the upper blade supporting them for generally vertical movement toward and away from the lower blade; at least one of the segments of the upper blade being mounted for generally vetical movement in relation to said common support so that said segment may be retracted from shearing action with the corresponding segment of the lower blade when such shearing action would otherwise take place due to movement of said common support toward the stationary lower blades and means for moving said at least one segment.
Claim 13
Dependent Claim
147 words
A shearing machine for sheet metal comprising: upper and lower blades positioned for shearing action therebetween, each blade comprising two segments with the segments of each blade being generally perpendicular to each other so as to form two generally "L" shaped blades; means supporting the lower blade in a stationary position and a single common vertically moveable support for both segments of the upper blade supporting them for generally vertical movement toward and away from the lower blade; at least one of the segments of the upper blade being mounted for generally vetical movement in relation to said common support so that said segment may be retracted from shearing action with the corresponding segment of the lower blade when such shearing action would otherwise take place due to movement of said common support toward the stationary lower blades and means for moving said at least one segment.
Claim 14
Dependent Claim
17 words
The machine of claim 10 in which the common support is moved by a fluid operated cylinder.
Claim 15
Dependent Claim
34 words
The machine of claim 10 in which the means for moving said at least one segments of the upper blade is a fluid operated cylinder connected to move the blade for vertical movement thereof.
Claim 16
Dependent Claim
53 words
The machine of claim 10 in which said at least one segment of the upper blade has an inclined edge bearing against a surface of the common support and said segment has associated means for movement of the segment along its length with the inclined edge moving in relation to its bearing surface.
Claim 17
Dependent Claim
19 words
The machine of claim 13 in which the means for movement of the segment is a fluid operated cylinder.
Claim 18
Dependent Claim
23 words
The machine of claim 10 including means for operating the common moveable support over a short vertical stroke and a long vertical stroke.
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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) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |