Patent US3777608A successfully refreshed from Google Patents.
US3777608A
Expired / Lapsed
US
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Shear for metal plate
Assignee: Siegener Maschinenbau GmbH
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Filing: 1971-07-22
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Granted: 1973-12-11
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Expires: 1991-07-22
Abstract
Abstract A shear for cutting metal plate in which the knives are mounted on C-shaped yokes which are adjustably mounted between spaced, parallel stands.
Inventors
- 👤 G Kopf
- 👤 A Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:31
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/04; Y; Y10; Y10T; Y10T83/00; Y10T83/808; Y10T83/817; Y10T83/819; Y10T83/825; Y10T83/869; Y10T83/8742; Y10T83/8743; Y10T83/8821; Y10T83/8841; Y10T83/8853; Y10T83/8874
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
A shear for sheet metal plate, having at least one longitudinal pair of knives along with a driving means for the upper blade, which pair is held between stands of door-shape arranged one after the other in the direction of movement of the sheet metal plate, the knives of each longitudinal knife pair being held on the free ends of a C-shaped yoke and the latter being displaceably supported between the two stands in guides transversely of the direction of movement of the sheet metal plate, characterized by the fact that to each yoke behind the exit side end of each longitudinal knife pair is arranged a transverse knife pair along with a driving means for the upper blade, the cutting edges of the transverse knife pair extending upWardly from the cutting plane of the longitudinal knife pairs, its upper knife driving means being separable by means of a coupling from the upper knife driving means of the longitudinal knife pair, its upper knife being capable of being driven independently of the upper knife of the longitudinal knife pair.
Claim 2
Dependent Claim
179 words
A shear for sheet metal plate, having at least one longitudinal pair of knives along with a driving means for the upper blade, which pair is held between stands of door-shape arranged one after the other in the direction of movement of the sheet metal plate, the knives of each longitudinal knife pair being held on the free ends of a C-shaped yoke and the latter being displaceably supported between the two stands in guides transversely of the direction of movement of the sheet metal plate, characterized by the fact that to each yoke behind the exit side end of each longitudinal knife pair is arranged a transverse knife pair along with a driving means for the upper blade, the cutting edges of the transverse knife pair extending upWardly from the cutting plane of the longitudinal knife pairs, its upper knife driving means being separable by means of a coupling from the upper knife driving means of the longitudinal knife pair, its upper knife being capable of being driven independently of the upper knife of the longitudinal knife pair.
Claim 3
Dependent Claim
38 words
A shear as recited in claim 1, characterized by the fact that the upper knife driving means of the transverse knife pair is synchronized in operating conditions with the upper knife driving means of the longitudinal knife pair.
Claim 4
Dependent Claim
59 words
A shear as recited in claim 2, characterized by the fact that the upper knife driving means for the transverse knife pair may be connected by a gear coupling for cutting operation with the upper knife driving means of the longitudinal knife pairs or may be locked by engagement with a fixed gear segment with the upper knife lifted.
Claim 5
Dependent Claim
23 words
A shear as recited in claim 3, characterized by the fact that the gear coupling is operated by a pressure fluid adjusting member.
Claim 6
Dependent Claim
32 words
A shear as recited in claim 1, characterized by the fact that the throat of the C-shaped yoke is at least equal to the half of the maximum sheet metal plate width.
Claim 7
Dependent Claim
52 words
A shear as recited in claim 1, having two longitudinal knife pairs for division of sheet metal plates into three strips, characterized by the fact that two symmetrical yokes are mounted in opposition to each other, are guided between the door-shaped stands, and are arranged for independent adjustment relative to each other.
Claim 8
Dependent Claim
50 words
A shear as recited in claim 5, characterized by the fact that the depth of throat of the two C-shaped yokes corresponds at least to one third of the maximum sheet metal plate width and one yoke may have a throat depth corresponding to half the maximum sheet metal width.
Claim 9
Dependent Claim
34 words
A shear as recited in claim 1, characterized by the fact that the two free ends of each yoke are held by the door-shaped stands on both sides by its own hydraulic clamping guide.
Claim 10
Dependent Claim
29 words
A shear as recited in claim 1, characterized by the fact that each yoke is transversely adjustable between the door-shaped stands by means of its own adjusting driving means.
Claim 11
Dependent Claim
54 words
A shear as recited in claim 1, characterized by the fact that the lower end of each C-shaped yoke carries a straight fixed lower knife and the upper end carries a bow-shaped upper knife which is engageable with the lower knife by a rocking motion brought about by a drive carried by the yoke.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |