US3212720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal feed unit for crusher and method
Assignee: Nordberg Manufacturing Co
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Filing: 1963-11-18
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Granted: 1965-10-19
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Expires: 1983-11-18
Abstract
No abstract record available.
Inventors
- 👤 Rudolph J Gasparac
- 👤 Howard M Zoerb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:19
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A CRUSHER, A FRAME, AN OVERHANGING BOWL IN THE FRAME, A GYRATORY HEAD MOUNTED IN THE FRAME DEFINING A CRUSHING CAVITY WITH THE BOWL, POWER MEANS FOR GYRATING THE HEAD AT A PREDETERMINED RATE, A FEED CONE ABOVE THE CRUSHING CAVITY ARRANGED TO DELIVER MATERIAL BY GRAVITY TO THE CAVITY, A FEED DISTRIBUTOR ABOVE THE CAVITY GENEALLY WITHIN THE FEED CONE AND GENERALLY ALIGNED AXIALLY WITH THE HEAD BUT SPACED FROM IT, AND SEPARATE POWER MEANS FOR ROTATING THE DISTRIBUTOR SO THAT MATERIAL WILL BE FED TO THE CAVITY AT A RATE INDEPENDENT OF THE RATE OF GYRATION OF THE HEAD.
Claim 2
Independent Claim
45 words
A METHOD OF OPERATING A CRUSHER HAVING A BOWL OVERHANGING AND DEFINING A CRUSHING CAVITY WITH A GYRATORY HEAD, INCLUDING THE STEPS OF GYRATING THE HEAD AT A PREDETERMINED RATE, FEEDING MATERIAL TO THE CRUSHING CAVITY FROM A POINT ABOVE IT, DISTRIBUTING THE MATERIAL GENERALLY
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |