Patent US3844362A successfully refreshed from Google Patents.
US3844362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring device
Assignee: Individual
•
Filing: 1973-05-14
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Granted: 1974-10-29
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Expires: 1993-05-14
Abstract
Abstract A device for boring holes or cleaning conduits comprising a body having a front end and a rear end. Forward drive means are provided at the rear end of said body for receiving fluid under pressure from a fluid delivery means. A boring head is rotatably mounted in the body and projects from the front end of the body. The boring head has a boring member at its free end. First passage means are provided in the body for directing fluid to the forward drive means to impart a forward force on the boring head. Second passage means are further provided for directing fluid to a third passage means in the boring head for ejecting fluid tangentially from the boring head to impart a torque to the boring head.
Inventors
- 👤 K Elbert
- 👤 T Janssen
- 👤 K Gotzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
E; E21; E21B; E21B37/00; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/049; B08B9/0495; B08B9/0497; E21B10/00; E21B10/60; E21B4/00; E21B4/02; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
219 words
A device for boring holes through ground comprising a body having a front end and a rear end, a boring head rotatably mounted in the body and projecting from said front end, said boring head having A boring member at its free end, two or more drive jets symmetrically disposed about said body rear end and having an orifice positioned to release fluid pressure axially of said body to impart a forward pressure to said boring head, first passage means for directing fluid through the body to said two or more drive jets, two or more torque generating jets symmetrically disposed about said head and rearwardly thereof, second passage means for directing fluid to said torque generating jets in the boring head for ejecting fluid tangentially from the boring head to impart a torque and a stabilizing forward thrust to said boring head, fluid delivery means connected to the rear end of said body and in communication with said first and second passage means, said drive jets and torque generating jets having an orifice of selected diameter to provide a predetermined rate of rotation and penetration of said boring head at a preselected fluid pressure applied to said first and second passage means and to maintain said body in a substantially straight line of penetration when boring through ground.
Claim 2
Independent Claim
219 words
A device for boring holes through ground comprising a body having a front end and a rear end, a boring head rotatably mounted in the body and projecting from said front end, said boring head having A boring member at its free end, two or more drive jets symmetrically disposed about said body rear end and having an orifice positioned to release fluid pressure axially of said body to impart a forward pressure to said boring head, first passage means for directing fluid through the body to said two or more drive jets, two or more torque generating jets symmetrically disposed about said head and rearwardly thereof, second passage means for directing fluid to said torque generating jets in the boring head for ejecting fluid tangentially from the boring head to impart a torque and a stabilizing forward thrust to said boring head, fluid delivery means connected to the rear end of said body and in communication with said first and second passage means, said drive jets and torque generating jets having an orifice of selected diameter to provide a predetermined rate of rotation and penetration of said boring head at a preselected fluid pressure applied to said first and second passage means and to maintain said body in a substantially straight line of penetration when boring through ground.
Claim 3
Dependent Claim
38 words
A device as claimed in claim 1 including fourth passage means in the boring head extending forwardly from the one position through the boring head for directing a small proportion of the fluid forwardly out of the device.
Claim 4
Dependent Claim
77 words
A device as claimed in claim 1 wherein said boring head has a projecting concentric cylindrical portion at its forward end, the front surface of the cylindrical portion being slightly dished, the cylindrical portion along with the forward end of the boring member, carrying abrading material, and at least two passageways leading outwardly to the peripheral edge of the front surface from the one position to direct a small proportion of the fluid forwardly of the device.
Claim 5
Dependent Claim
41 words
A device as claimed in claim 1 wherein said body is of substantially the same diameter as said head and provided with flutes extending along its outer surface in a direction parallel to the axis of rotation of the boring head.
Claim 6
Dependent Claim
24 words
A device as claimed in claim 1 wherein said fluid delivery means comprises a flexible tube connected to the rear end of the body.
References Cited (Backward Citations)
US1060929A
Cited
US1766487A
Cited
US2340738A
Cited
US2932836A
Cited
US3432872A
Cited
US3525112A
Cited
US3547191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |