US3638523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing machine of the interchangeable knife-holder-type
Assignee: Hitachi Ltd
•
Filing: 1970-05-13
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Granted: 1972-02-01
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Expires: 1990-05-13
Abstract
Abstract A shearing machine of the interchangeable knife-holder-type in which the knife holders are able to be laterally removed together with the movable and stationary knifes supported thereon out of the machine. The movable and stationary knife holders are provided with adjusting wedges respectively so that each wedge disposed in the knife holder may independently adjust the clearance at the knife holder slide guide and the clearance between the movable and stationary knives. Thus is obviated the adjusting operation of the above-described clearances after the knife holders are mounted to the machine.
Inventors
- 👤 Tetutaro Yasuda
- 👤 Tsuneo Nakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:29
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/008; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8748; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9478; Y10T83/9483; Y10T83/9486
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
In a shearing machine of the interchangeable knife holder type in which a movable knife holder and a stationary knife holder are able to be inserted into and removed out of the opening in the housing of the machine, the improvement comprising a first adjustable wedge means mounted in said movable knife holder for making a predetermined clearance between said movable knife holder and the sliding surfaces of the opening of said housing before said movable knife holder is inserted into said opening of the housing, a second adjustable wedge means mounted in said stationary knife holder for making a predetermined clearance between a movable knife and a stationary knife, and hydraulic pressure cylinder means disposed in said housing for fixedly holding said stationary knife holder by urging said stationary knife holder onto one side of said opening of said housing in the direction to enlarge the clearance between the movable and stationary knives.
Claim 2
Dependent Claim
154 words
In a shearing machine of the interchangeable knife holder type in which a movable knife holder and a stationary knife holder are able to be inserted into and removed out of the opening in the housing of the machine, the improvement comprising a first adjustable wedge means mounted in said movable knife holder for making a predetermined clearance between said movable knife holder and the sliding surfaces of the opening of said housing before said movable knife holder is inserted into said opening of the housing, a second adjustable wedge means mounted in said stationary knife holder for making a predetermined clearance between a movable knife and a stationary knife, and hydraulic pressure cylinder means disposed in said housing for fixedly holding said stationary knife holder by urging said stationary knife holder onto one side of said opening of said housing in the direction to enlarge the clearance between the movable and stationary knives.
Claim 3
Dependent Claim
47 words
A shearing machine of the interchangeable knife holder type as claimed in claim 1, wherein said stationary knife holder is further provided with a third adjustable wedge means for making a clearance between said stationary knife holder and the sliding surfaces of said opening of said housing.
Claim 4
Dependent Claim
64 words
A shearing machine of the interchangeable knife holder type as claimed in claim 1, wherein said first and second adjustable wedge means each comprises a tapered wedge member, means for holding said wedge member from outside so that said wedge member may be slided along the sloped surface of the knife holder, and an adjusting means for adjusting the position of said wedge member.
Claim 5
Dependent Claim
68 words
A shearing machine of the interchangeable knife holder type as claimed in claim 2, wherein said third adjustable wedge means comprises a tapered wedge member, means for holding said wedge member from outside so that said wedge member may be slided along the sloped surface of the knife holder between said last-mentioned means and said knife holder, and adjusting means for adjusting the position of said wedge member.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |