Patent US3895550A successfully refreshed from Google Patents.
US3895550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendable arm punching apparatus
Assignee: US Amada Ltd
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Filing: 1974-06-05
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Granted: 1975-07-22
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Expires: 1994-06-05
Abstract
Abstract A punching apparatus is provided with a tool holder that has integral upper and lower arms. The upper and lower arms are provided with punches and dies, respectively. In one form, a smaller punch and die set is spaced longitudinally behind a larger punch and die set and laterally offset in a direction toward the work sheet clamps. In another form, the smaller punch and die set is spaced longitudinally forward in a direction toward the work sheet clamps and laterally offset from the larger punch and die set. The tool holder is extendable longitudinally and laterally to accurately align either the large punch and die set or the smaller punch and die set beneath a striker. In one form, the upper arm is recessed closely adjacent the smaller punch to reduce interference with the work sheet clamps. In both forms, the tool holder can also be extended further to a tool changing position.
Inventors
- 👤 Dennis Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:49
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/04; B21D28/00; B21D28/24; B21D28/26; B21D28/265; B21D28/34; Y; Y10; Y10T; Y10T83/00; Y10T83/647; Y10T83/654; Y10T83/869; Y10T83/8727; Y10T83/8729; Y10T83/873
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
In a punching apparatus of the type having a work sheet supporting table, work sheet clamps for holding a work sheet on the table, means for moving the work sheet clamps over the table, and a tool holder having an upper arm provided with a punch and a lower arm provided with a die and movable for positioning said punch and die beneath a striker, the improvement comprising: a second smaller punch and die spaced from said first punch and die on said upper and lower arms in the direction toward said work sheet clamps, and means for moving said tool holder longitudinally and laterally for positioning said second punch and die beneath said striker whereby a plurality of tools may be employed to punch said work sheet.
Claim 2
Dependent Claim
128 words
In a punching apparatus of the type having a work sheet supporting table, work sheet clamps for holding a work sheet on the table, means for moving the work sheet clamps over the table, and a tool holder having an upper arm provided with a punch and a lower arm provided with a die and movable for positioning said punch and die beneath a striker, the improvement comprising: a second smaller punch and die spaced from said first punch and die on said upper and lower arms in the direction toward said work sheet clamps, and means for moving said tool holder longitudinally and laterally for positioning said second punch and die beneath said striker whereby a plurality of tools may be employed to punch said work sheet.
Claim 3
Dependent Claim
66 words
The punching apparatus of claim 1, said second punch and die being longitudinally offset from said first punch and die and laterally offset from said first punch and die in a direction toward said work sheet clamps, said tool holder moving means including guiding means for positioning said tool holder laterally so as to locate said laterally offset second punch and die accurately beneath said striker.
Claim 4
Dependent Claim
63 words
The punching apparatus of claim 2, said tool holder moving means including primary moving means for moving the tool holder between a fully retracted position with the first punch and die beneath said striker to a partially extended position with the second punch and die beneath the striker, and secondary moving means for further extending the tool holder to a tool changing position.
Claim 5
Dependent Claim
48 words
The punching apparatus of claim 3, said primary moving means including adjustable stop means and spring means for holding the tool holder against said guiding means and said guiding means for said tool holder moving means being adjustable for accurately locating the punches and dies beneath said striker.
Claim 6
Dependent Claim
30 words
The punching apparatus of claim 3, said primary and secondary tool holder moving means being recessed below said work sheet supporting surface for allowing free passage of said work sheet.
Claim 7
Dependent Claim
45 words
The punching apparatus of claim 2, said upper arm having a forward portion provided with a peripheral edge closely adjacent said first and second dies and recessed inwardly around said second die to allow movement of the work sheet clamps close to said second die.
Claim 8
Dependent Claim
45 words
The punching apparatus of claim 4, said upper arm having a forward portion provided with a peripheral edge closely adjacent said first aNd second dies and recessed inwardly around said second die to allow movement of the work sheet clamps close to said second die.
Claim 9
Dependent Claim
31 words
The punching apparatus of claim 1, said second punch and die being laterally offset from said first punch and die and longitudinally offset in a direction toward the work sheet clamps.
References Cited (Backward Citations)
US117593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |