US3600995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate shears
Assignee: Haemmerle AG Maschinenfabrik
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Filing: 1969-11-17
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Granted: 1971-08-24
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Expires: 1989-11-17
Abstract
Abstract Plate shears having a frame, lower and upper, reciprocable knives, spaced-apart groups of support members in the track in which the upper knife is movable, a locking device for some of the support members, for holding them with their upper contact surfaces flush with the table of the shears, and control means for unlocking the locking device after the upper knife has reached a predetermined position as it moves along the track.
Inventors
- 👤 Eduard A Hanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:54
CPC Classifications
B; B23; B23D; B23D33/00; B23D33/02; B23D33/025; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/0419; Y10T83/202; Y10T83/2092; Y10T83/2198; Y10T83/2209; Y10T83/2216
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
Plate shears comprising a frame, a lower knife and an upper knife movable thereagainst and movable along a track, a first group of vertically movable support members, a second group of vertically movable support members spaced from said first group, said groups being arranged in the track of the upper knife, a locking device for at least each of the support members of the first group by means of which the support members can be held in such a position that their upper contact surfaces are flush with the table of the plate shears, and control means for unlocking each locking device after the upper knife has reached predetermined positions in the course of its movement along its track.
Claim 2
Dependent Claim
119 words
Plate shears comprising a frame, a lower knife and an upper knife movable thereagainst and movable along a track, a first group of vertically movable support members, a second group of vertically movable support members spaced from said first group, said groups being arranged in the track of the upper knife, a locking device for at least each of the support members of the first group by means of which the support members can be held in such a position that their upper contact surfaces are flush with the table of the plate shears, and control means for unlocking each locking device after the upper knife has reached predetermined positions in the course of its movement along its track.
Claim 3
Dependent Claim
53 words
Plate shears as claimed in claim 1, each locking device comprises a pawl movable at right angles to the axis of the support members, engageable in a suitably shaped notch in the support member, a spring for urging the pawl towards the notch and a lever for withdrawing the pawl from the notch.
Claim 4
Dependent Claim
34 words
Plate shears as claimed in claim 2, wherein a cam whose movement is controlled by the upper knife of the plate shears is provided to operate the lever for the withdrawal of the pawl.
Claim 5
Dependent Claim
45 words
Plate shears as claimed in claim 1, wherein each locking device comprises a pawl movable at right angles to the axis of the support member, engageable in a suitably shaped notch in the support member and hydraulic means for urging the pawl towards the notch.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |