US3645345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic pile-driving shoes
Assignee: Individual
•
Filing: 1970-07-14
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Granted: 1972-02-29
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Expires: 1990-07-14
Abstract
Abstract An annulus encircles the lower end portion of a pile which is impacted at its upper end. The annulus contains a radially contractable and expansible collar consisting of a plurality of individual segments, and an expansible and contractable hollow ring is interposed between the annulus and the collar. The collar is actuated by hydraulic fluid under pulsating pressure, so that the collar segments impart vibration to the pile while it is being driven into the earth. The hollow ring has at least two segmental sections each spanning only a portion of the total number of collar segments, and the hydraulic fluid supply is controllable by valves so that the ring segments may be actuated in unison or in alternating succession.
Inventors
- 👤 Horace W Olsen
- 👤 Max Bassett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:02
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/72
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A dynamic driving shoe for placement on the lower end portion of a pile which is driven into the earth by impacts delivered to its upper end; said shoe comprising a pile-encircling annulus, a radially contractable and expansible collar mounted on the inside of said annulus for engagement with a pile, and hydraulically actuated means for alternately contracting and expanding said collar whereby to impart vibrations to the pile.
Claim 2
Dependent Claim
69 words
A dynamic driving shoe for placement on the lower end portion of a pile which is driven into the earth by impacts delivered to its upper end; said shoe comprising a pile-encircling annulus, a radially contractable and expansible collar mounted on the inside of said annulus for engagement with a pile, and hydraulically actuated means for alternately contracting and expanding said collar whereby to impart vibrations to the pile.
Claim 3
Dependent Claim
38 words
The device as defined in claim 1 wherein said hydraulically actuated means include an expansible and contractable hollow ring interposed between said annulus and said collar, and means for delivering hydraulic fluid under pulsating pressure into said ring.
Claim 4
Dependent Claim
21 words
The device as defined in claim 2 wherein said collar includes a plurality of individual collar segments engaged by said ring.
Claim 5
Dependent Claim
61 words
The device as defined in claim 2 wherein said collar includes a plurality of individual collar segments engaged by said ring, said ring consisting of at least two segmental ring sections which are isolated from each other and are connected independently to said fluid-delivering means, each of said ring sections spanning only a portion of the total number of collar segments.
Claim 6
Dependent Claim
49 words
The device as defined in claim 4 wherein said fluid-delivering means include at least two conduits connected to the respective ring sections, a hydraulic pump, and valve means operable to deliver hydraulic fluid from said pump under pulsating pressure to said conduits selectively in unison or in alternating succession.
Claim 7
Dependent Claim
49 words
The device as defined in claim 1 wherein sad collar comprises a plurality of individual collar segments movable radially inwardly from said annulus when the collar is contracted, and stop means provided on the inside of the annulus for engagement by said collar segments to limit their inward movement.
Claim 8
Dependent Claim
44 words
The device as defined in claim 6 together with resilient bumper means interposed between said collar segments and said stop means, said bumper means being resiliently compressed when the collar segments are moved inwardly and serving to bias the segments in the outward direction.
Claim 9
Dependent Claim
22 words
The device as defined in claim 6 which is further characterized in that said collar segments are pivotally mounted in said annulus.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |