US3685380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-track turret and overload protection
Assignee: US Amada Ltd
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Filing: 1971-02-19
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Granted: 1972-08-22
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Expires: 1991-02-19
Abstract
Abstract A punch press is provided with turrets having radially spaced tools and a radially shiftable striker for selectively engaging the tools. The striker is carried by a transport mechanism which is shifted by powered means and is vertically slideable relative to the powered means. The powered means include two radially spaced cylinders each containing a piston. A fixed piston rod is connected to the radially inner piston and a moveable piston rod is connected to the radially outer piston and to the transport means. Accurate positioning of the striker is obtained by controlling the relative positions of the pistons and cylinders. The transport means holds the striker for free relative upward movement. A shear plate is positioned over the striker and a backup plate is positioned over the shear plate. The backup plate contains openings for receiving a slug cut from the shear plate by the striker to relieve the striker when overloaded.
Inventors
- 👤 Dennis Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:08
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/12; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/37; Y10T83/00; Y10T83/869; Y10T83/8702; Y10T83/8704; Y10T83/8706; Y10T83/8727; Y10T83/8732
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
A punch press having multi-track turret mechanism rotatable about a central axis, said turret mechanism including upper and lower turrets for holding a plurality of circumferentially spaced tools some of which are at different radial distances from said central axis, means for rotating said turrets into selected positions, a punch striker, means for selectively shifting the striker radially over the radially spaced tools, and means for driving said striker against the tool in any one of said shifted positions.
Claim 2
Dependent Claim
79 words
A punch press having multi-track turret mechanism rotatable about a central axis, said turret mechanism including upper and lower turrets for holding a plurality of circumferentially spaced tools some of which are at different radial distances from said central axis, means for rotating said turrets into selected positions, a punch striker, means for selectively shifting the striker radially over the radially spaced tools, and means for driving said striker against the tool in any one of said shifted positions.
Claim 3
Dependent Claim
55 words
The punch press of claim 1 said means for shifting the striker including transport means for holding the striker, powered means for shifting the transport means radially, and means for securing the transport means to the powered means for allowing relative vertical motion therebetween so that the striker can be driven downwardly against the tool.
Claim 4
Dependent Claim
78 words
The punch press of claim 2 said powered means including a ram having at least two radially spaced cylinders, a piston in each cylinder, a fixed piston rod secured to the radially inner cylinder, a movable piston rod secured to the radially outer piston and to said transport means, and control means for directing pressurized fluid into selected cylinders for shifting the piston rods and cylinders relative to one another for shifting the transport radially into predetermined positions.
Claim 5
Dependent Claim
64 words
The punch press of claim 1 said means for driving the striker including a backup plate having apertures aligned with the radial positions of the shiftable striker, a shear plate positioned between the striker and the backup plate, said striker shifting means including means for holding the striker for free upward movement whereby an overload will drive the striker up through the shear plate.
Claim 6
Dependent Claim
91 words
A punch press having a punch striker, a ram for driving the striker downwardly, means aligned below the striker for holding a tool, means for holding the striker for free upward movement, a shear plate positioned over said striker, a backup plate positioned over said shear plate, said backup plate having at least one opening for receiving a slug cut from said shear plate whereby a punching load over a safe maximum will drive the striker into the shear plate for allowing upward movement of the striker relative to the ram.
Claim 7
Dependent Claim
91 words
A punch press having a punch striker, a ram for driving the striker downwardly, means aligned below the striker for holding a tool, means for holding the striker for free upward movement, a shear plate positioned over said striker, a backup plate positioned over said shear plate, said backup plate having at least one opening for receiving a slug cut from said shear plate whereby a punching load over a safe maximum will drive the striker into the shear plate for allowing upward movement of the striker relative to the ram.
References Cited (Backward Citations)
US2280701A
Cited
US3533322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |