US3772986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical double action press using a link mechanism
Assignee: Komatsu Ltd
•
Filing: 1971-12-29
•
Granted: 1973-11-20
•
Expires: 1991-12-29
Abstract
Abstract A mechanical double action press using a link mechanism is utilizing four point link mechanism which is the simplest in construction, comprising main shafts extending from front to rear of a crown and having the length substantially equal to that in front to rear of it, one of said main shafts whereon inner slide driving gears being fitted, and another said main shaft whereon outer slide driving gears being fitted. In condition of operating, the speed in an idle stroke is higher than that in drawing work stroke, thereby it is possible to reduce the time required for one cycle.
Inventors
- 👤 T Kawagoshi
- 👤 K Aoshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:58
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/26; B30B1/268; B21; B21D; B21D24/00; B21D24/10; B21D24/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
389 words
A mechanical double action press using a link mechanism, comprising a press body, said press body including a bed body, an upright extending upwardly from said bed body and a crown body spaced above said bed body and mounted on said upright, said crown body having a front side and an oppositely disposed rear side, an inner slide and an outer slide mounted in said press body for movement in the upward and downward directions, a pair of main shafts disposed in spaced relation in said press body and each said main shaft extending completely through said crown from its front side to its rear side as a single member, plates attached to the ends of said main shafts and said plates rigidly fixed to said crown body so that said shafts are not axially transferable and cannot rotate, one of said main shafts is associated with said inner slide and the other said main shaft is associated with said outer slide, a plurality of driving gears rotatably mounted on each of said main shafts, an eccentric circular plate portion located on said driving gears mounted on said main shaft associated with said inner slide, an inner slide driving link fitted to each of said eccentric circular plate portions, a link lever pin connected to said inner slide driving link and to said inner slide, an eccentric wheel secured to each of said driving gears on said main shaft associated with said inner slide, inner slide, a connecting rod mounted on each of said eccentric wheels, a rocker shaft spaced laterally from said main shaft associated with said inner slide, an inner slide rocker arm pin connected to said connecting rod at one end and mounted on said rocker shaft at its other end, outer slide rocker arms associated with said rocker shaft and displaceable through the same rotational angle as said inner slide rocker arm through said rocker shaft, a vertically arranged outer slide driving link having an upper end and a lower end and mounted on said shaft associated with said outer slide, an upper connecting link pin connected to said outer slide rocker arm and to the upper end of said upper slide driving link, and a lower connecting link pin connected both to the lower end of said driving link and to said outer slide.
Claim 2
Dependent Claim
389 words
A mechanical double action press using a link mechanism, comprising a press body, said press body including a bed body, an upright extending upwardly from said bed body and a crown body spaced above said bed body and mounted on said upright, said crown body having a front side and an oppositely disposed rear side, an inner slide and an outer slide mounted in said press body for movement in the upward and downward directions, a pair of main shafts disposed in spaced relation in said press body and each said main shaft extending completely through said crown from its front side to its rear side as a single member, plates attached to the ends of said main shafts and said plates rigidly fixed to said crown body so that said shafts are not axially transferable and cannot rotate, one of said main shafts is associated with said inner slide and the other said main shaft is associated with said outer slide, a plurality of driving gears rotatably mounted on each of said main shafts, an eccentric circular plate portion located on said driving gears mounted on said main shaft associated with said inner slide, an inner slide driving link fitted to each of said eccentric circular plate portions, a link lever pin connected to said inner slide driving link and to said inner slide, an eccentric wheel secured to each of said driving gears on said main shaft associated with said inner slide, inner slide, a connecting rod mounted on each of said eccentric wheels, a rocker shaft spaced laterally from said main shaft associated with said inner slide, an inner slide rocker arm pin connected to said connecting rod at one end and mounted on said rocker shaft at its other end, outer slide rocker arms associated with said rocker shaft and displaceable through the same rotational angle as said inner slide rocker arm through said rocker shaft, a vertically arranged outer slide driving link having an upper end and a lower end and mounted on said shaft associated with said outer slide, an upper connecting link pin connected to said outer slide rocker arm and to the upper end of said upper slide driving link, and a lower connecting link pin connected both to the lower end of said driving link and to said outer slide.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |