Patent US3675463A successfully refreshed from Google Patents.
US3675463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shiftable press brake die
Assignee: Niagara Machine and Tool Works
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Filing: 1971-03-29
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Granted: 1972-07-11
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Expires: 1991-03-29
Abstract
Abstract A press brake die for forming right angle bends in metal sheets wherein the die has several longitudinal parallel V-grooves of various depths to adapt the same for forming bends in sheets of various thicknesses. The under surface of the die and the upper surface of the die support have longitudinal complementary corrugations of a pitch equal to the spacing of the V-grooves of the die whereby the corrugations of the die and support may be interfitted with the die in various transverse positions to register any selected V-groove thereof with the punch carried by the ram of the press brake.
Inventors
- 👤 Frederick E Munschauer Jr
- 👤 George H Trautman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:47
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/02; B21D5/0209
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
In a press brake having a relatively fixed bed and a reciprocating ram, a V-shaped punch carried by said ram for producing angular bends in metal sheets, and die structure for cooperation with said punch, said die structure comprising a support carried by said bed and having uniformly spaced longitudinal corrugations in its upper surface extending parallel to said V-shaped punch, and die means having complementary interfitting corrugatIons in its under surface, a series of parallel V-grooves in the upper surface of said die means spaced at the same pitch as said corrugations whereby the several Vgrooves register with said punch in various transverse positions of said die means on said support.
Claim 2
Dependent Claim
112 words
In a press brake having a relatively fixed bed and a reciprocating ram, a V-shaped punch carried by said ram for producing angular bends in metal sheets, and die structure for cooperation with said punch, said die structure comprising a support carried by said bed and having uniformly spaced longitudinal corrugations in its upper surface extending parallel to said V-shaped punch, and die means having complementary interfitting corrugatIons in its under surface, a series of parallel V-grooves in the upper surface of said die means spaced at the same pitch as said corrugations whereby the several Vgrooves register with said punch in various transverse positions of said die means on said support.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1 wherein the corrugations of said support and said die means comprise uniform continuously curving undulations.
Claim 4
Dependent Claim
35 words
Apparatus according to claim 1 wherein the ridges of the corrugations in the under surface of said die means coincide with the centers of the V grooves in the upper surface of said die means.
Claim 5
Dependent Claim
35 words
Apparatus according to claim 2 wherein the ridges of the corrugations in the under surface of said die means coincide with the centers of the V grooves in the upper surface of said die means.
Claim 6
Dependent Claim
35 words
Apparatus according to claim 1 wherein said die means comprises a series of blocks in end-to-end abutment whereby the die means is shifted transversely from one operating position to another by serially shifting said blocks.
Claim 7
Dependent Claim
35 words
Apparatus according to claim 2 wherein said die means comprises a series of blocks in end-to-end abutment whereby the die means is shifted transversely from one operating position to another by serially shifting said blocks.
Claim 8
Dependent Claim
22 words
Apparatus according to claim 5 wherein each block has handle means at its forward longitudinal face to facilitate shifting said blocks transversely.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |