US4307845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Striker bar for rotary cage grinder
Assignee: United States Steel Corp
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Filing: 1977-09-12
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Granted: 1981-12-29
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Expires: 1997-09-12
Abstract
Abstract A striker bar for a rotary cage grinder in which the impact-receiving portions of the bar are of an abrasion resistant ceramic, such as aluminum oxide, silicon carbide, or tungsten carbide. The bar includes a block of the ceramic, preferably formed in sections abutting end-to end, adhesively affixed to an angle iron mounting, which is removably attached to supporting structural members in the cage.
Inventors
- 👤 Thomas M. Larimer
- 👤 Joseph P. McGinness
- 👤 Robert E. Parkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:09
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/26; B02C13/28; B02C13/2804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A striker bar for a rotary cage grinder, said bar comprising a metal mounting having an impact-receiving portion, a block of abrasion resistant aluminum oxide covering said mounting at the impact-receiving portion, epoxy adhesive affixing said block to said mounting, and means on said mounting for removably attaching the bar to a cage.
Claim 2
Dependent Claim
53 words
A striker bar for a rotary cage grinder, said bar comprising a metal mounting having an impact-receiving portion, a block of abrasion resistant aluminum oxide covering said mounting at the impact-receiving portion, epoxy adhesive affixing said block to said mounting, and means on said mounting for removably attaching the bar to a cage.
Claim 3
Dependent Claim
23 words
A striker bar as defined in claim 1 in which said mounting has two angularly related legs overlying two faces of said block.
Claim 4
Dependent Claim
39 words
A striker bar as defined in claim 2 in which the legs of said mounting have a minimum thickness of 1/2 inch and said attaching means includes bolts having heads countersunk in one of the legs of said mounting.
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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |