US3811530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil-compaction method and apparatus for a seismic energy source transducer
Assignee: Western Atlas International Inc
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Filing: 1971-05-05
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Granted: 1974-05-21
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Expires: 1991-05-05
Abstract
Abstract A hydraulic lifting mechanism is provided to lift and lower a seismic transducer relative to the bed of a carrier. After the transducer couples with the ground, a portion of the carrier is raised above ground to apply a predetermined static load to the transducer. Maximum static loading is accomplished by using the lift mechanism to raise one end of the carrier just clear off the ground, regardless of local surface relief. An incremental lift is then automatically added to compensate for soil compaction.
Inventors
- 👤 O Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:36
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/04; G01V1/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
In a portable seismic energy source apparatus including a transducer having a base plate for use on a land surface in combination with a vehicular mass, a lifting means interconnecting said transducer and said vehicular mass for alternatingly retracting said transducer from and pressing said transducer against said land surface, said lifting means being adapted to lift one end of said vehicular mass from the ground surface to transfer a preselected fraction of the weight of the vehicular mass from said one end thereof to the transducer to thereby apply a static loading to said base plate, a load-sensing means interconnected with said lifting means adapted to disable said lifting means when the preselected fractional vehicular-mass weight has been transferred to said base plate, the improvement including: a time-delay means interconnected with said load-sensing means to delay disablemEnt of said lifting means until a predetermined incremental lift has been achieved, said incremental lift being determined in accordance with the bearing strength of the soil beneath said base plate.
Claim 2
Dependent Claim
168 words
In a portable seismic energy source apparatus including a transducer having a base plate for use on a land surface in combination with a vehicular mass, a lifting means interconnecting said transducer and said vehicular mass for alternatingly retracting said transducer from and pressing said transducer against said land surface, said lifting means being adapted to lift one end of said vehicular mass from the ground surface to transfer a preselected fraction of the weight of the vehicular mass from said one end thereof to the transducer to thereby apply a static loading to said base plate, a load-sensing means interconnected with said lifting means adapted to disable said lifting means when the preselected fractional vehicular-mass weight has been transferred to said base plate, the improvement including: a time-delay means interconnected with said load-sensing means to delay disablemEnt of said lifting means until a predetermined incremental lift has been achieved, said incremental lift being determined in accordance with the bearing strength of the soil beneath said base plate.
References Cited (Backward Citations)
US3283846A
Cited
US3550719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |