US3918289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammer board
Assignee: D B Oswald & Co Ltd
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Filing: 1973-09-20
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Granted: 1975-11-11
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Expires: 1993-09-20
Abstract
Abstract A hammer board for drop hammers used in forging comprising a metal body faced on each side with a high friction material, the body is preferably of aluminium tubes, juxtaposed and the facing is a rigid material bonded to the tubes.
Inventors
- 👤 Donald Buchanan Oswald
- 👤 Melvin Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
B; B23; B23P; B23P15/00; B21; B21J; B21J13/00; B21J7/00; B21J7/20; B21J7/36; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A HAMMER BOARD COMPRISING IN COMBINATION AN ELONGATED METAL BODY HAVING OPPOSED, SUBSTANTIALLY PARALLEL. FLAT WORKING FACES, SAID BODY BEING FORMED FROM A PLURALITY OF SIMILAR, HOLLOW, ELONGATE ALUMINUM METAL MEMBERS OF RECTANGULAR CROSS SECTION EXTENDING SIDE-BY-SIDE IN A SURFACE-TO-SURFACE RELATIONSHIP AND PARALLEL TO THE LONGITUDINAL AXIS OF SAID BODY, EACH OF SAID WORKING FACES BEING AT LEAST PARTIALLY COVERED BY A STRIP OF FACING MATERIAL HAVING A HIGH CO-EFFICENT OF FRICTION, SAID STRIP BEING BONDED BY AN ADHESIVE BONDING AGENT TO SAID FACES WHEREBY SAID MEMBERS ARE SECURED TOGETHER AS A UNITARY MEMBER.
Claim 2
Dependent Claim
94 words
A HAMMER BOARD COMPRISING IN COMBINATION AN ELONGATED METAL BODY HAVING OPPOSED, SUBSTANTIALLY PARALLEL. FLAT WORKING FACES, SAID BODY BEING FORMED FROM A PLURALITY OF SIMILAR, HOLLOW, ELONGATE ALUMINUM METAL MEMBERS OF RECTANGULAR CROSS SECTION EXTENDING SIDE-BY-SIDE IN A SURFACE-TO-SURFACE RELATIONSHIP AND PARALLEL TO THE LONGITUDINAL AXIS OF SAID BODY, EACH OF SAID WORKING FACES BEING AT LEAST PARTIALLY COVERED BY A STRIP OF FACING MATERIAL HAVING A HIGH CO-EFFICENT OF FRICTION, SAID STRIP BEING BONDED BY AN ADHESIVE BONDING AGENT TO SAID FACES WHEREBY SAID MEMBERS ARE SECURED TOGETHER AS A UNITARY MEMBER.
Claim 3
Dependent Claim
24 words
A hammer board as claimed in claim 1 wherein said adhesive bonding agent secures adjacent side faces of said tubes together in rigid juxtaposition.
Claim 4
Dependent Claim
39 words
A hammer board as claimed in claim 2 wherein said facing material comprises a plurality of rectangular strips of substantially rigid material extending transversely to said longitudinal axis of said body, adjacent sides of said strips abutting each other.
Claim 5
Dependent Claim
22 words
The hammer board of claim 1 in which at least some of the ends of said tubular members have caps disposed thereover.
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 |