US3918290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammer forging die
Assignee: ATI Ladish Co Inc
•
Filing: 1974-10-02
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Granted: 1975-11-11
•
Expires: 1994-10-02
Abstract
Abstract The dowel is made integral with the shank of the die.
Inventors
- 👤 Robert M Ulichny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
B; B21; B21J; B21J13/00; B21J13/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
A hammer forging die block having a shank extending across its underside, and comprising a dowel integral with said shank and the underside of said block.
Claim 2
Dependent Claim
26 words
A hammer forging die block having a shank extending across its underside, and comprising a dowel integral with said shank and the underside of said block.
Claim 3
Dependent Claim
41 words
The combination of the die block of claim 1 and a sow block having a recess across its upper surface for receiving said shank, and a dowel recess extending laterally from said first named recess and generally complimentary to said dowel.
Claim 4
Dependent Claim
37 words
The construction of claim 2 and relief areas disposed at all corners between said dowel and the surfaces of said complimentary recess to substantially prevent undue stress concentration in either the die block or the sow block.
Claim 5
Dependent Claim
27 words
The construction of claim 2 in which said dowel is of less thickness than said shank to avoid loading of said dowel with the vertical hammer forces.
Claim 6
Dependent Claim
18 words
The die block of claim 1 in which said integral dowel is of less thickness than said shank.
Claim 7
Dependent Claim
17 words
The die block of claim 2 in which the shank and integral dowel thereof are contour milled.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |