US3565190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auger-type boring machines
Assignee: Sanwa Kizai Co Ltd
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Filing: 1969-03-06
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Granted: 1971-02-23
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Expires: 1989-03-06
Abstract
Abstract Auger-type boring machines for drilling cylindrical holes in order to make pile foundations in the earth, comprising a double auger consisting of an outside auger and an inside auger, with oppositely twisted threads the latter being rotatably passed through the inside of the former, whereby efficiently to produce holes of large diameters, by rotating the augers in opposite directions.
Inventors
- 👤 Morindo Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:38
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/22; E21B7/00; E21B7/002; E21B7/20; E21B7/201
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A boring machine comprising, in combination, double auger means including first and second augers, said second auger being inserted lengthwise and rotatably through the inside of said first auger, the latter including a hollow shaft provided with screws twisted in one direction on the outer periphery thereof, said second auger including a shaft provided with screws twisted in the other direction on the outer periphery thereof, tower means for raising and lowering said augers, and drive means for rotating said augers in the respective opposite directions.
Claim 2
Dependent Claim
86 words
A boring machine comprising, in combination, double auger means including first and second augers, said second auger being inserted lengthwise and rotatably through the inside of said first auger, the latter including a hollow shaft provided with screws twisted in one direction on the outer periphery thereof, said second auger including a shaft provided with screws twisted in the other direction on the outer periphery thereof, tower means for raising and lowering said augers, and drive means for rotating said augers in the respective opposite directions.
Claim 3
Dependent Claim
35 words
The boring machine as defined in claim 1, wherein said hollow shaft of the first auger is provided with at least one window for extracting the soil removed during the operation of the boring machine.
Claim 4
Dependent Claim
38 words
The boring machine as defined in claim 1, further comprising a casing reciprocable by said tower means, wherein the upper portions of said augers are secured to said casing, and said drive means is disposed on said casing.
Claim 5
Dependent Claim
48 words
The boring machine as defined in claim 3, wherein said casing includes an element having a hole through which a beam is allowed to pass, selectively to receive working force added for pulling said augers out of the earth, and to perform therewith load tests on inserted piles.
Claim 6
Dependent Claim
28 words
The boring machine as defined in claim 3, wherein said second auger is adapted for being freely inserted in and extracted from said inside of the first auger.
Claim 7
Dependent Claim
31 words
The boring machine as defined in claim 5, further comprising a frame supporting said upper portion of the second auger, and lock means for detachably locking said frame to said casing.
Claim 8
Dependent Claim
39 words
The boring machine as defined in claim 6, wherein said lock means includes a mounting element fixed to said frame, a plurality of pins projecting from said mounting element, and latch means on said casing for engaging said pins.
Claim 9
Dependent Claim
42 words
The Boring machine as defined in claim 3, wherein said upper portions of the augers are rotatably secured to said casing, and said drive means includes at least one motor and means for transmitting rotational forces from said motor to said augers.
Claim 10
Dependent Claim
60 words
The boring machine as defined in claim 8, wherein said second auger includes a feeding pipe running throughout said shaft thereof for introducing a fluid, the upper end of said pipe being connected to an outwardly projecting pipe to convey said fluid, whereas its lower end is open for injecting said fluid at the lower end of said second auger.
Claim 11
Dependent Claim
76 words
The boring machine as defined in claim 9, wherein said first auger includes a plurality of guide pipes for introducing reinforcing bars which are adapted to pass through the wall of said hollow shaft and being spaced equally in the circumferential direction of said wall, the upper end of said guide pipes being open for inserting said bars, and the lower ends of said guide pipes being open at the lower end of said first auger.
Claim 12
Dependent Claim
40 words
The boring machine as defined in claim 8, where in drive means includes a first motor mounted on said casing for rotation of said first auger, and a second motor mounted on said frame for rotation of said second auger.
Claim 13
Dependent Claim
17 words
The boring machine as defined in claim 11, wherein at least one of said motors is reversible.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |