US4412469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turret punch presses having tool holders rotatably mounted in the turrets
Assignee: Amada Co Ltd
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Filing: 1981-03-18
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Granted: 1983-11-01
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Expires: 2001-03-18
Abstract
Abstract A turret punch press having a pair of upper and lower turrets ono which a plurality of pairs of upper and lower punching tools are mounted to punch a variety of holes in sheet materials is disclosed. Each of the upper and lower turrets is synchronously rotatable such that the upper and lower punching tools may be synchronously rotated or indexed in order to punch holes of the same size and shape, but different orientation, in the sheet material.
Inventors
- 👤 Tadashi Hirata
- 👤 Katsuyoshi Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:53
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/12; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8727; Y10T83/8732; Y10T83/8737
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A turret punch press having motor-driven rotatable upper and lower turrets for punching holes in sheet materials, comprising: a plurality of upper punching tools rotatably attached to said upper turret; a plurality of lower punching tools rotatably attached to said lower turret; a vertically movable ram attached to said punch press in such a manner that, upon activation, it drives at least one of said plurality of upper and at least one of said plurality of lower punching tools through said sheet material; means for synchronously rotating said upper and lower punching tools to desired positions; and said means for synchronously rotating said upper and lower punching tools including servomotors connected to drive said rotatable plurality of upper and lower punching tools, whereby holes of the same shape but with different orientations may be punched in said sheet material.
Claim 2
Dependent Claim
139 words
A turret punch press having motor-driven rotatable upper and lower turrets for punching holes in sheet materials, comprising: a plurality of upper punching tools rotatably attached to said upper turret; a plurality of lower punching tools rotatably attached to said lower turret; a vertically movable ram attached to said punch press in such a manner that, upon activation, it drives at least one of said plurality of upper and at least one of said plurality of lower punching tools through said sheet material; means for synchronously rotating said upper and lower punching tools to desired positions; and said means for synchronously rotating said upper and lower punching tools including servomotors connected to drive said rotatable plurality of upper and lower punching tools, whereby holes of the same shape but with different orientations may be punched in said sheet material.
Claim 3
Dependent Claim
27 words
A turret punch press of claim 1, further including clutch and brake means for automatically fixing said upper and lower rotatable punching tools in a desired position.
Claim 4
Dependent Claim
40 words
The turret punch press of claim 2, further including numerical control means for automatically synchronously rotating and stopping said upper and lower punching tools to continuously punch a variety of holes of identical size and shape but of different direction.
Claim 5
Dependent Claim
23 words
The turret punch press of claim 2, further including means for detecting whether said clutch and brake means are engaged with each other.
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) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |