US3339980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrally open cutterhead support for a boring machine
Assignee: JAMES S ROBBINS AND ASSOCIATES Inc
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Filing: 1966-08-15
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Granted: 1967-09-05
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Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Douglas F Winberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:21
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/06; E21D9/08; E21D9/0875; E21D9/0879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A CUTTERHEAD ASSEMBLY FOR A BORING MACHINE COMPRISING: A BORE WALL CONTACTING GUIDE MEANS; A NON-ROTATING TRANSVERSE CUTTERHEAD SUPPORT STRUCTURE EXTENDING RADIALLY INWARDLY FROM THE BORE WALL CONTACTING GUIDE MEANS TO A CENTRAL PORTION OF SAID SUPPORT STRUCTURE HAVING A CENTRAL PASSAGEWAY THEREIN EXTENDING AXIALLY OF THE BORE, SAID SUPPORT STRUCTURE EXTENDING TRANSVERSELY OF THE PATH OF TRAVEL OF THE MACHINE AND THE BORE MADE THEREBY; A ROTARY CUTTERHEAD ON ONE SIDE OF AND RADIALLY OVERLYING SAID CUTTERHEAD SUPPORT STRUCTURE, AND INCLUDING CUTTER MEANS AND MEANS FOR DIRECTING THE MINED MATERIAL TOWARDS THE CENTRAL PASSAGEWAY IN SAID CUTTERHEAD SUPPORT STRUCTURE; MATERIAL RECEIVING MEANS PARTIALLY SITUATED IN THE CENTRAL PASSAGEWAY OF SAID CUTTERHEAD SUPPORT STRUCTURE, IN POSITION TO RECEIVE THE MINED MATERIAL; ANNULAR BEARING MEANS BETWEEN SAID CUTTERHEAD AND SAID CUTTERHEAD SUPPORT STRUCTURE, IN CONCENTRIC SURROUNDING RELATIONSHIP TO THE CENTRAL PASSAGEWAY IN SAID CUTTERHEAD SUPPORT STRUCTURE, SAID BEARING MEANS ROTATIVELY SUPPORTING THE CUTTERHEAD ON A FORWARD PORTION OF THE CUTTER-
Claim 2
Dependent Claim
159 words
A CUTTERHEAD ASSEMBLY FOR A BORING MACHINE COMPRISING: A BORE WALL CONTACTING GUIDE MEANS; A NON-ROTATING TRANSVERSE CUTTERHEAD SUPPORT STRUCTURE EXTENDING RADIALLY INWARDLY FROM THE BORE WALL CONTACTING GUIDE MEANS TO A CENTRAL PORTION OF SAID SUPPORT STRUCTURE HAVING A CENTRAL PASSAGEWAY THEREIN EXTENDING AXIALLY OF THE BORE, SAID SUPPORT STRUCTURE EXTENDING TRANSVERSELY OF THE PATH OF TRAVEL OF THE MACHINE AND THE BORE MADE THEREBY; A ROTARY CUTTERHEAD ON ONE SIDE OF AND RADIALLY OVERLYING SAID CUTTERHEAD SUPPORT STRUCTURE, AND INCLUDING CUTTER MEANS AND MEANS FOR DIRECTING THE MINED MATERIAL TOWARDS THE CENTRAL PASSAGEWAY IN SAID CUTTERHEAD SUPPORT STRUCTURE; MATERIAL RECEIVING MEANS PARTIALLY SITUATED IN THE CENTRAL PASSAGEWAY OF SAID CUTTERHEAD SUPPORT STRUCTURE, IN POSITION TO RECEIVE THE MINED MATERIAL; ANNULAR BEARING MEANS BETWEEN SAID CUTTERHEAD AND SAID CUTTERHEAD SUPPORT STRUCTURE, IN CONCENTRIC SURROUNDING RELATIONSHIP TO THE CENTRAL PASSAGEWAY IN SAID CUTTERHEAD SUPPORT STRUCTURE, SAID BEARING MEANS ROTATIVELY SUPPORTING THE CUTTERHEAD ON A FORWARD PORTION OF THE CUTTER-
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |