US3134580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel machine
Assignee: MID STATES TOOL AND Mfg CO
•
Filing: 1961-07-07
•
Granted: 1964-05-26
•
Expires: 1981-07-07
Abstract
No abstract record available.
Inventors
- 👤 Claude W Helm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:53
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/1086; E21D9/06; E21D9/08; E21D9/0875; E21D9/0879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A TUNNELING MACHINE COMPRISING A CYLINDRICAL OUTER CASING, A STATIONARY HUB COAXIALLY SUPPORTED WITHIN SAID CASING, AN AXIALLY ADJUSTABLE AND NON-ROTATABLE SHAFT SUPPORTED WITHIN SAID HUB AND INCLUDING AT LEAST ONE END PROJECTING AXIALLY THEREBEYOND, A HUB ROTATABLY SUPPORTED ON SAID SHAFT, A PLURALITY OF STRUTS EXTENDING OUTWARDLY FROM SAID ROTATABLE HUB, A RIM MEMBER SUPPORTED UPON THE OUTER ENDS OF SAID STRUTS, SAID RIM MEMBERS EXTENDING REARWARDLY OVER SAID ROTATABLE HUB AND SHAFT IN THE DIRECTION OF SAID STATIONARY HUB, A PLURALITY OF CUTTING ELEMENTS FIXED TO SAID STRUTS FOR ENGAGING THE MATERIAL TO BE CUT, SAID CUTTING ELEMENTS BEING GENERALLY FLUSH WITH THE FORWARD EDGE OF SAID CYLINDRICAL CASING DURING NORMAL CUTTING OPERATION, A FRUSTO-CONICALLY SHAPED MEMBER SECURED TO SAID CYLINDRICAL CASING AND TAPERING FROM THE LEADING EDGE OF SAID CASING INWARDLY IN SPACED RELATION TOWARD SAID RIM MEMBER, AN INTERNAL GEAR MEMBER MOUNTED ON SAID RIM MEMBER COAXIALLY WITH SAID SHAFT INTERCONNECTED DRIVE, MOTOR AND SPEED REDUCING MEANS MOUNTED WITHIN SAID CYLINDRICAL CASING, AN EXTERNALLY SPLINED POWER SHAFT OPERATIVELY CONNECTED TO SAID DRIVE MEANS, AN INTERNALLY SPLINED GEAR MEMBER MOUNTED ON SAID SPLINED POWER SHAFT FOR ROTATION THEREWITH, SAID LATTER GEAR MEMBER BEING ADAPTED TO DRIVINGLY ENGAGE SAID INTERNAL GEAR MEMBER MOUNTED ON SAID RIM MEMBER, FIRST POWER MEANS ADAPTED TO AXIALLY MOVE SAID STATIONARY HUB SUPPORTED
Claim 2
Dependent Claim
220 words
A TUNNELING MACHINE COMPRISING A CYLINDRICAL OUTER CASING, A STATIONARY HUB COAXIALLY SUPPORTED WITHIN SAID CASING, AN AXIALLY ADJUSTABLE AND NON-ROTATABLE SHAFT SUPPORTED WITHIN SAID HUB AND INCLUDING AT LEAST ONE END PROJECTING AXIALLY THEREBEYOND, A HUB ROTATABLY SUPPORTED ON SAID SHAFT, A PLURALITY OF STRUTS EXTENDING OUTWARDLY FROM SAID ROTATABLE HUB, A RIM MEMBER SUPPORTED UPON THE OUTER ENDS OF SAID STRUTS, SAID RIM MEMBERS EXTENDING REARWARDLY OVER SAID ROTATABLE HUB AND SHAFT IN THE DIRECTION OF SAID STATIONARY HUB, A PLURALITY OF CUTTING ELEMENTS FIXED TO SAID STRUTS FOR ENGAGING THE MATERIAL TO BE CUT, SAID CUTTING ELEMENTS BEING GENERALLY FLUSH WITH THE FORWARD EDGE OF SAID CYLINDRICAL CASING DURING NORMAL CUTTING OPERATION, A FRUSTO-CONICALLY SHAPED MEMBER SECURED TO SAID CYLINDRICAL CASING AND TAPERING FROM THE LEADING EDGE OF SAID CASING INWARDLY IN SPACED RELATION TOWARD SAID RIM MEMBER, AN INTERNAL GEAR MEMBER MOUNTED ON SAID RIM MEMBER COAXIALLY WITH SAID SHAFT INTERCONNECTED DRIVE, MOTOR AND SPEED REDUCING MEANS MOUNTED WITHIN SAID CYLINDRICAL CASING, AN EXTERNALLY SPLINED POWER SHAFT OPERATIVELY CONNECTED TO SAID DRIVE MEANS, AN INTERNALLY SPLINED GEAR MEMBER MOUNTED ON SAID SPLINED POWER SHAFT FOR ROTATION THEREWITH, SAID LATTER GEAR MEMBER BEING ADAPTED TO DRIVINGLY ENGAGE SAID INTERNAL GEAR MEMBER MOUNTED ON SAID RIM MEMBER, FIRST POWER MEANS ADAPTED TO AXIALLY MOVE SAID STATIONARY HUB SUPPORTED
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |