Patent US3978733A successfully refreshed from Google Patents.
US3978733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampler for extracting core samples
Assignee: F A P M O
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Filing: 1974-03-08
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Granted: 1976-09-07
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Expires: 1994-03-08
Abstract
Abstract A sampler for extracting core samples from a mass of sugar cane. The sampler is mounted on a fixed or movable support which includes a plate member on which the cylinder of an operating jack is mounted. The piston of the jack is secured at one end of a rod which has at its other end another piston for expelling core samples. A sleeve extends around a portion of the length of the rod and rotatably mounts a hollow cylindrical core cutter with a toothed cutting edge. A motor is mounted on the sleeve for rotating the core cutter. Selectively operable temporary securing fingers are provided on the sleeve of alternate engagement with a collar on the rod so that the sleeve, core cutter and rod are displaceable in unison by the jack for lowering and raising the core cutter into and out of a mass, and with the plate member for preventing the axial movement of the core cutter with respect to the support so that displacement of the rod displaces the other piston in the core cutter to expel the core sample. Alternatively an auxiliary jack is mounted in the sleeve for expelling the core samples and the rod is fixed to the sleeve and the selectively operable securing fingers are eliminated.
Inventors
- 👤 Patrick Paul Avot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:35
CPC Classifications
E; E21; E21B; E21B25/00; Y; Y10; Y10T; Y10T408/00; Y10T408/50; Y10T408/51; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
257 words
A sampler for extracting core samples from a mass, comprising a support, an operating jack including a cylinder fixed to the support and a first piston arranged for displacement in said cylinder, means for admitting pressure fluid to said cylinder to displace said first piston axially in said cylinder, a rod carrying said first piston, a second piston on said rod remote from said first piston, a sleeve member directly received on said rod intermediate said first and second pistons, a core cutter comprising a hollow cylindrical body with a cutting edge at its one end remote from the jack, means mounting said core cutter for axial displacement with and rotation on and relative to said sleeve member, said sleeve member having a portion that projects axially beyond the other end of said core cutter in the direction of said jack, power means mounted on said projecting portion of said sleeve member for rotating said core cutter relative to said sleeve member, said second piston being axially displaceable in said core cutter, and means for selectively securing said projecting portion of said sleeve member to said rod for axial displacement of said core cutter into and out of a mass to be sampled in response to axial displacement of said first piston, and alternatively selectively securing said projecting portion of said sleeve member to said support for axial displacement of said rod relative to said sleeve member for expelling core samples from said core cutter in response to displacement of said first piston toward said cutting edge.
Claim 2
Dependent Claim
257 words
A sampler for extracting core samples from a mass, comprising a support, an operating jack including a cylinder fixed to the support and a first piston arranged for displacement in said cylinder, means for admitting pressure fluid to said cylinder to displace said first piston axially in said cylinder, a rod carrying said first piston, a second piston on said rod remote from said first piston, a sleeve member directly received on said rod intermediate said first and second pistons, a core cutter comprising a hollow cylindrical body with a cutting edge at its one end remote from the jack, means mounting said core cutter for axial displacement with and rotation on and relative to said sleeve member, said sleeve member having a portion that projects axially beyond the other end of said core cutter in the direction of said jack, power means mounted on said projecting portion of said sleeve member for rotating said core cutter relative to said sleeve member, said second piston being axially displaceable in said core cutter, and means for selectively securing said projecting portion of said sleeve member to said rod for axial displacement of said core cutter into and out of a mass to be sampled in response to axial displacement of said first piston, and alternatively selectively securing said projecting portion of said sleeve member to said support for axial displacement of said rod relative to said sleeve member for expelling core samples from said core cutter in response to displacement of said first piston toward said cutting edge.
Claim 3
Dependent Claim
32 words
A sampler as claimed in claim 1, wherein a collar is mounted on said rod intermediate said pistons for cooperation with the means for selectively securing said rod relative to the sleeve.
Claim 4
Dependent Claim
25 words
A sampler as claim in claim 2, wherein said collar includes a frusto-conical portion defining a shoulder for cooperation with the means for selectively securing.
Claim 5
Dependent Claim
65 words
A sampler as claimed in claim 2, wherein said sleeve member has two ends of which the one adjacent said jack is of reduced cross section closely overlying said rod, and wherein said one of said ends of the sleeve member is disposed between said first piston and said collar and the other of said ends is disposed between said second piston and said collar.
Claim 6
Dependent Claim
30 words
A sampler as claimed in claim 2, wherein the means for selectively securing includes finger portions displaceable radially relative to the rod and engageable with the shoulder on the collar.
Claim 7
Dependent Claim
39 words
A sampler as claimed in claim 5, said finger portions being engageable with said shoulder in a radially inner position of said finger portions and being engageable with said support in a radially outer position of said finger portions.
Claim 8
Dependent Claim
48 words
A sampler as claimed in claim 1, wherein the support includes a plate member, and wherein the cylinder is mounted on and extends from one side of the plate member, and said sleeve member and said core cutter are arranged on the other side of the plate member.
Claim 9
Dependent Claim
17 words
A sampler as claimed in claim 1, wherein said sleeve member and said core cutter are concentric.
References Cited (Backward Citations)
US3704627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |