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US3817338A
Expired / Lapsed
US
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Heavy duty soil sampler
Assignee: Sprague and Henwood Inc
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Filing: 1973-03-01
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Granted: 1974-06-18
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Expires: 1993-03-01
Abstract
Abstract A heavy duty soil sampler is provided which includes a driving head that is detachably connected to a split plug which is fixedly secured to a hollow split barrel with the head and plug retained together by set screws engaged in a groove in the plug. The barrel is held together at the lower end by a hollow shoe in threaded engagement therewith.
Inventors
- 👤 G Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:31
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/02; E21B25/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A heavy duty soil sampler which comprises: a driving head with a have been inserted before lower terminus providing an upper driving head having an internal cylindrical bore and a lower driving shoulder, a lower shoe having an internally threaded portion, a hollow tubular longitudinally split barrel between said head and said shoe having an upper terminus in engagement with said first mentioned terminus, said barrel having extending upwardly From said second mentioned terminus a plug portion in slidable engagement in said bore, retaining means carried by said head in retaining engagement with said plug portion on opposite portions thereof, and said barrel having a lower threaded portion in detachable engagement with the threaded portion of said shoe.
Claim 2
Dependent Claim
118 words
A heavy duty soil sampler which comprises: a driving head with a have been inserted before lower terminus providing an upper driving head having an internal cylindrical bore and a lower driving shoulder, a lower shoe having an internally threaded portion, a hollow tubular longitudinally split barrel between said head and said shoe having an upper terminus in engagement with said first mentioned terminus, said barrel having extending upwardly From said second mentioned terminus a plug portion in slidable engagement in said bore, retaining means carried by said head in retaining engagement with said plug portion on opposite portions thereof, and said barrel having a lower threaded portion in detachable engagement with the threaded portion of said shoe.
Claim 3
Dependent Claim
32 words
A heavy duty soil sampler as defined in claim 1 in which said driving head has an internal threaded portion at the end opposite to said bore for receiving a drill rod.
Claim 4
Dependent Claim
30 words
A heavy duty soil sampler as defined in claim 1 in which said retaining means comprises opposed set screws carried by said driving head and engaged with said opposite portions.
Claim 5
Dependent Claim
17 words
A heavy duty soil sampler as defined in claim 3 in which said opposite portions are flats.
Claim 6
Dependent Claim
25 words
A heavy duty soil sampler as defined in claim 1 in which said plug portion is split in alignment with the split of the barrel.
Claim 7
Dependent Claim
27 words
A heavy duty soil sampler as defined in claim 5 in which the splits in said barrel and in said plug are offset from a diametrical plane.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |