US3869003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pile drivers
Assignee: Sanwa Kizai Co Ltd
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Filing: 1972-12-26
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Granted: 1975-03-04
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Expires: 1992-12-26
Abstract
Abstract Cylinder stoppers and tower receiving blocks are automatically or self-operatively engaged or disengaged in the inventive pile drivers through cylinder operation so as to press a pile and to drop the monkey to apply its impact force to a pile provided that the pressing is inappropriate, and in some cases, this force is combined with a rotary excavating force of an earth auger to expedite quick and sure pile driving operation, e.g. of a precast pile.
Inventors
- 👤 Shigeru Yamada
- 👤 Mamoru Hamano
- 👤 Kaname Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:47
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
A pile driving apparatus comprising, in combination: a tower erected on a base, adapted to support a hollow pile to be driven into the ground; a plurality of reaction-receiving elements arranged in pairs vertically at suitable intervals along the length of said tower; a monkey slidably suspended from said tower and having stoppers attached thereto and successively engageable with said pairs of elements; said monkey constituting part of press-in means and being in the form of a framework with a central opening; an assembly support slidably suspended from said framework; actuating hydraulic cylinders disposed below said monkey for driving the pile into the ground by the pressing force provided by said cylinders; and earth auger means including an auger screw insertable into the hollow pile, whereby the latter can be driven into the ground by the combined pressing force provided by said cylinders, as aforesaid, and the excavating force of said screw.
Claim 2
Dependent Claim
152 words
A pile driving apparatus comprising, in combination: a tower erected on a base, adapted to support a hollow pile to be driven into the ground; a plurality of reaction-receiving elements arranged in pairs vertically at suitable intervals along the length of said tower; a monkey slidably suspended from said tower and having stoppers attached thereto and successively engageable with said pairs of elements; said monkey constituting part of press-in means and being in the form of a framework with a central opening; an assembly support slidably suspended from said framework; actuating hydraulic cylinders disposed below said monkey for driving the pile into the ground by the pressing force provided by said cylinders; and earth auger means including an auger screw insertable into the hollow pile, whereby the latter can be driven into the ground by the combined pressing force provided by said cylinders, as aforesaid, and the excavating force of said screw.
Claim 3
Dependent Claim
36 words
The pile driving apparatus as defined in claim 1, wherein said hydraulic cylinders include buffer means for avoiding the generation of percussion sound when the impact force of the dropping monkey is received by said cylinders.
Claim 4
Dependent Claim
18 words
The pile driving apparatus as defined in claim 1, wherein said reaction-receiving elements are substantially trapezoidal in shape.
Claim 5
Dependent Claim
41 words
The pile driving apparatus as defined in claim 1, wherein said monkey has outer side plates carrying guide elements, the latter for engaging rail means disposed along at least a portion of said tower for sliding displacement of said monkey therealong.
Claim 6
Dependent Claim
34 words
The pile driving apparatus as defined in claim 1, wherein said earth auger further includes an excavating head at the end of said screw, and means for rotating the latter together with said head.
Claim 7
Dependent Claim
20 words
The pile driving apparatus as defined in claim 5, further comprising coupling means between said rotating means and said screw.
Claim 8
Dependent Claim
34 words
The pile driving appaRatus as defined in claim 1, wherein said framework has on its inside further guide elements for engaging further rail means disposed along at least a portion of said assembly support.
Claim 9
Dependent Claim
35 words
The pile driving apparatus as defined in claim 7, wherein said assembly support has at least one lateral supporting detent adapted to be engaged by and during the upward movement of said earth auger means.
References Cited (Backward Citations)
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Cited
US3568571A
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |