US3695090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical double-action press of link mechanism type
Assignee: Komatsu Ltd
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Filing: 1970-08-14
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Granted: 1972-10-03
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Expires: 1990-08-14
Abstract
Abstract Mechanical double-action press of link mechanism type, in which metal sheet blanks are produced to formed articles by a drawing work, and in particular, within the pressing region, the speed of an inner slide is remarkably slow thereby to produce no cracking or cutting, and at the ascending and returning period of the inner slide, said inner slide is accelerated and rapidly ascends, whereby it is intended to increase the production efficiency of the press-formed articles having no cracks or cuts.
Inventors
- 👤 Masaaki Kita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:17
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/26; B30B1/268; B21; B21D; B21D24/00; B21D24/10; B21D24/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
237 words
A mechanical double-action press of the link mechanism type, comprising a plurality of main shafts arranged to be driven by a prime mover through a transmission mechanism, a drive gear mounted on each of said main shafts, an eccentric shaft portion provided on each of said drive gears, an upwardly extending inner slide driving rod mounted on each of said eccentric shaft portions, a plurality of outer slide driving lever shafts each spaced laterally from one of said main shafts, a link member connecting the upper end of each of said inner slide driving rods to a corresponding one of said outer slide driving lever shafts, a first swing lever fixed on each of said outer slide driving lever shafts, a pin integrally formed on each said drive gear, a plurality of first connecting levers each mounted at one end on one of said pins and at its other end to one of said first swing levers, said first connecting levers arranged for swinging said outer slide driving lever shaft for a predetermined angle, an upwardly extending outer slide driving lever fitted on each of said main shafts, a second swing lever fixed on each of said outer slide driving lever shafts, and a second connecting lever connecting the upper end of each said outer slide driving lever to a correSponding one of said second swing levers fixed to one of said outer slide driving lever shafts.
Claim 2
Dependent Claim
237 words
A mechanical double-action press of the link mechanism type, comprising a plurality of main shafts arranged to be driven by a prime mover through a transmission mechanism, a drive gear mounted on each of said main shafts, an eccentric shaft portion provided on each of said drive gears, an upwardly extending inner slide driving rod mounted on each of said eccentric shaft portions, a plurality of outer slide driving lever shafts each spaced laterally from one of said main shafts, a link member connecting the upper end of each of said inner slide driving rods to a corresponding one of said outer slide driving lever shafts, a first swing lever fixed on each of said outer slide driving lever shafts, a pin integrally formed on each said drive gear, a plurality of first connecting levers each mounted at one end on one of said pins and at its other end to one of said first swing levers, said first connecting levers arranged for swinging said outer slide driving lever shaft for a predetermined angle, an upwardly extending outer slide driving lever fitted on each of said main shafts, a second swing lever fixed on each of said outer slide driving lever shafts, and a second connecting lever connecting the upper end of each said outer slide driving lever to a correSponding one of said second swing levers fixed to one of said outer slide driving lever shafts.
Claim 3
Dependent Claim
84 words
A mechanical double-action press, as set forth in claim 1, wherein a crown encloses said main shafts and is divided into a right-hand side and a left-hand side, one pair of main shafts disposed in axial alignment with the adjacent end faces thereof spaced a slight distance apart in the right-hand side of said crown, and another pair of said main shafts disposed in axial alignment with the adjacent end faces thereof spaced a slight distance apart in the left-hand side of said crown.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |