US3869948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shear apparatus
Assignee: Aetna Standard Engineering Co
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Filing: 1974-03-07
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Granted: 1975-03-11
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Expires: 1994-03-07
Abstract
Abstract Flying shear apparatus is disclosed suitable for cutting elongated strand material as it moves in a predetermined path. The apparatus includes two crankshafts having eccentric crank pins on which knife holding portions are rotatably mounted, each knife holding portion being rigidly connected to one end of a link member the other end of which is pivotally connected to a movable member that reciprocates in a fixed path, both link members being pivotally connected to the movable member about a common axis. Furthermore, the apparatus includes means to permit individual adjustment of the angular position of a crankshaft relative to the other, to permit adjustment of the cutting blade clearance. The slidable member also acts as a guide for the strand material being cut. The arrangement provides positive control and synchronization of the relationships of the cutting blades relative to each other at all times.
Inventors
- 👤 Robert J Rau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:12
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/56; B26D1/60; B26D1/605; B23; B23D; B23D25/00; B23D25/02; B23D25/08; B26D1/565; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4653; Y10T83/4656; Y10T83/4734; Y10T83/4766; Y10T83/4783; Y10T83/4786; Y10T83/4795; Y10T83/483; Y10T83/4836; Y10T83/525; Y10T83/54; Y10T83/929; Y10T83/9457; Y10T83/9464; Y10T83/9469
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
142 words
Shear apparatus for cutting an elongated workpiece that is movable in a predetermined path of travel comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means for rotating said crankshafts simultaneously in opposite angular directions so said cutting blades approach in cutting relation to cut said workpiece and separate, a movable supporting member movable in a fixed path substantially parallel to said predetermined path of travel of the workpiece, and a pair of link members each of which is connected at one of its ends to one of said blade holders and at its other end to said movable supporting member.
Claim 2
Dependent Claim
142 words
Shear apparatus for cutting an elongated workpiece that is movable in a predetermined path of travel comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means for rotating said crankshafts simultaneously in opposite angular directions so said cutting blades approach in cutting relation to cut said workpiece and separate, a movable supporting member movable in a fixed path substantially parallel to said predetermined path of travel of the workpiece, and a pair of link members each of which is connected at one of its ends to one of said blade holders and at its other end to said movable supporting member.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 in which the predetermined path of travel of said workpiece passeS through said slidable supporting member.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1 in which said link members are disposed on opposite sides of said predetermined path of travel of said workpiece.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 in which said cutting blades are adjustable relatively to each other.
Claim 6
Dependent Claim
31 words
The apparatus of claim 1 in which the angular position of at least one of said rotatable crankshafts is adjustable relative to the position of the other of said rotatable crankshafts.
Claim 7
Dependent Claim
24 words
The apparatus of claim 1 in which each of said link members is rigidly affixed to the blade holder to which it is connected.
Claim 8
Dependent Claim
19 words
The apparatus of claim 1 in which both of said link members are pivotally connected to said movable member.
Claim 9
Dependent Claim
31 words
The apparatus of claim 1 in which said movable supporting member is apertured in the direction of its path of travel and in which said workpiece passes through said movable member.
Claim 10
Dependent Claim
51 words
The apparatus of claim 1 in which said movable supporting member is apertured in the direction of its path of movement, and which comprises an elongated tubular member on which said movable supporting member is slidably mounted, and in which said workpiece passes through and is guided by said tubular member.
Claim 11
Dependent Claim
37 words
The apparatus of claim 1 comprising an elongated guide member for supporting and guiding the workpiece along its path of travel, and in which said movable supporting member is mounted for movement on said elongated guide member.
Claim 12
Dependent Claim
21 words
The apparatus of claim 1 in which said link members are pivotally connected to said movable member about the same axis.
Claim 13
Dependent Claim
148 words
Shear apparatus for cutting an elongated workpiece that is movable in a predetermined path of travel, comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel, each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means for rotating said crankshafts simultaneously in opposite angular directions so said cutting blades approach in cutting relation to cut said workpiece and separate, a pair of link members each of which is connected at one of its ends to one of said blade holders, and means causing said other end of each link member to reciprocate in a path parallel to said path of travel of said workpiece while said crankshafts revolve and while said workpiece passes between said link members.
Claim 14
Dependent Claim
148 words
Shear apparatus for cutting an elongated workpiece that is movable in a predetermined path of travel, comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel, each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means for rotating said crankshafts simultaneously in opposite angular directions so said cutting blades approach in cutting relation to cut said workpiece and separate, a pair of link members each of which is connected at one of its ends to one of said blade holders, and means causing said other end of each link member to reciprocate in a path parallel to said path of travel of said workpiece while said crankshafts revolve and while said workpiece passes between said link members.
Claim 15
Dependent Claim
16 words
The apparatus of claim 12 in which said cutting blades are adjustable relatively to each other.
Claim 16
Dependent Claim
31 words
The apparatus of claim 12 in which the angular position of at least one of said rotatable crankshafts is adjustable relative to the position of the other of said rotatable crankshafts.
Claim 17
Dependent Claim
24 words
The apparatus of claim 12 in which each of said link members is rigidly affixed to the blade holder to which it is connected.
Claim 18
Dependent Claim
26 words
The apparatus of claim 12 comprising means for passing said workpiece between said other ends of said link members before it passes to said cutting blades.
Claim 19
Dependent Claim
21 words
The apparatus of claim 12 in which said link members are pivotally connected to said movable member about the same axis.
Claim 20
Dependent Claim
195 words
Flying shear apparatus for cutting an elongated workpiece as it moves in a predetermined path of travel, comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel, each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, the off-set distances being substantially equal for both crankshafts, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means actuated by movement of a predetermined length of said workpiece for rotating said crankshafts in opposite angular directions as said cutting blades approach in cutting relation to cut said workpiece and separate, a tubular guide member rigidly mounted about the path of travel of said workpiece so said workpiece passes through said guide member and is guided by iT, a movable supporting member slidably mounted on said tubular guide member to support it for movement in a path parallel to said workpiece, and a pair of link members each of which is rigidly connected at one of its ends to one of said blade holders and at its other end is pivotally connected to said movable supporting member.
Claim 21
Dependent Claim
195 words
Flying shear apparatus for cutting an elongated workpiece as it moves in a predetermined path of travel, comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel, each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, the off-set distances being substantially equal for both crankshafts, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means actuated by movement of a predetermined length of said workpiece for rotating said crankshafts in opposite angular directions as said cutting blades approach in cutting relation to cut said workpiece and separate, a tubular guide member rigidly mounted about the path of travel of said workpiece so said workpiece passes through said guide member and is guided by iT, a movable supporting member slidably mounted on said tubular guide member to support it for movement in a path parallel to said workpiece, and a pair of link members each of which is rigidly connected at one of its ends to one of said blade holders and at its other end is pivotally connected to said movable supporting member.
Claim 22
Dependent Claim
195 words
Flying shear apparatus for cutting an elongated workpiece as it moves in a predetermined path of travel, comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel, each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, the off-set distances being substantially equal for both crankshafts, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means actuated by movement of a predetermined length of said workpiece for rotating said crankshafts in opposite angular directions as said cutting blades approach in cutting relation to cut said workpiece and separate, a tubular guide member rigidly mounted about the path of travel of said workpiece so said workpiece passes through said guide member and is guided by iT, a movable supporting member slidably mounted on said tubular guide member to support it for movement in a path parallel to said workpiece, and a pair of link members each of which is rigidly connected at one of its ends to one of said blade holders and at its other end is pivotally connected to said movable supporting member.
Claim 23
Dependent Claim
195 words
Flying shear apparatus for cutting an elongated workpiece as it moves in a predetermined path of travel, comprising two crankshafts rotatably mounted about axes on opposite sides of said path of travel, each of said crankshafts having a crank pin offset from the axis of rotation of said crankshaft, the off-set distances being substantially equal for both crankshafts, a blade holder carrying a cutting blade rotatably mounted on the crank pin of each of said crankshafts, means actuated by movement of a predetermined length of said workpiece for rotating said crankshafts in opposite angular directions as said cutting blades approach in cutting relation to cut said workpiece and separate, a tubular guide member rigidly mounted about the path of travel of said workpiece so said workpiece passes through said guide member and is guided by iT, a movable supporting member slidably mounted on said tubular guide member to support it for movement in a path parallel to said workpiece, and a pair of link members each of which is rigidly connected at one of its ends to one of said blade holders and at its other end is pivotally connected to said movable supporting member.
Claim 24
Dependent Claim
21 words
The apparatus of claim 18 in which said link members are pivotally connected to said movable member about the same axis.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |