Patent US3864978A successfully refreshed from Google Patents.
US3864978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic rotary sample injection valve
Assignee: Rosemount Inc
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Filing: 1974-02-19
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Granted: 1975-02-11
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Expires: 1994-02-19
Abstract
Abstract Two disc-shaped body sections are mounted facing one another for rotation about a generally centrally disposed shaft with a flat seal member interposed between the sections. Means are provided to selectively rotate the upper body section through a preselected angle about the shaft. A liquid flow channel is formed through the lower body section in communication with a bore for a sample-taking piston which is located in the upper body section. Drive means are arranged to reciprocate the piston to withdraw a liquid sample from the flow channel. After the sample is drawn, the upper body section is rotated and the sampling piston is driven downward to release the sample into a pyrolysis tube or the like.
Inventors
- 👤 Thomas M Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:48
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
230 words
A sampling device comprising: a. a valve body formed of two sections, each of which is constructed and arranged to present a flat face parallel to a corresponding flat face of the other; b. a lamina-like seal means forming a liquid-tight seal interposed between said faces; c. means connected to said body assembly to selectively rotate said sections relative to one another from a first position to a second position through a preselected angle while maintaining said faces parallel; d. a liquid flow inlet and an outlet spaced therefrom, both of which are formed through one of said sections, said inlet and outlet being arranged in fluid-flow communication with said face of that section; e. passageway means connecting said inlet and outlet in fluidflow communication with each other across said face of said first section; f. sample-taking piton means arranged in a cylindrical channel formed in the second of said sections in fluid-flow communication with said flow channel in said first section at said first position of said sections; g. means constructed and arranged to reciprocate said piston to withdraw a liquid sample of selected volume from said flow channel; h. an outlet port formed through said first section in fluidflow communication with said face thereof at said second position for receiving a liquid sample relEased from said cylinder by said sample-taking piston at said second position of said sections.
Claim 2
Dependent Claim
230 words
A sampling device comprising: a. a valve body formed of two sections, each of which is constructed and arranged to present a flat face parallel to a corresponding flat face of the other; b. a lamina-like seal means forming a liquid-tight seal interposed between said faces; c. means connected to said body assembly to selectively rotate said sections relative to one another from a first position to a second position through a preselected angle while maintaining said faces parallel; d. a liquid flow inlet and an outlet spaced therefrom, both of which are formed through one of said sections, said inlet and outlet being arranged in fluid-flow communication with said face of that section; e. passageway means connecting said inlet and outlet in fluidflow communication with each other across said face of said first section; f. sample-taking piton means arranged in a cylindrical channel formed in the second of said sections in fluid-flow communication with said flow channel in said first section at said first position of said sections; g. means constructed and arranged to reciprocate said piston to withdraw a liquid sample of selected volume from said flow channel; h. an outlet port formed through said first section in fluidflow communication with said face thereof at said second position for receiving a liquid sample relEased from said cylinder by said sample-taking piston at said second position of said sections.
Claim 3
Dependent Claim
45 words
A sampling device according to claim 1 further including an aperture formed through the face of said first section at a position between said flow channel and said outlet port for draining liquid which seeps from said flow channel toward said outlet between said sections.
Claim 4
Dependent Claim
39 words
A sampling device according to claim 1 wherein said means for reciprocating said sample-taking piston includes a drive piston assembly operable between a first and second position and means adjustable connecting said drive piston assembly to said sample-taking piston.
Claim 5
Dependent Claim
20 words
A sampling device according to claim 1 wherein said passageway means comprises a slot formed through said lamina-like seal means.
Claim 6
Dependent Claim
27 words
A sampling device according to claim 1 wherein radially extending grooves are formed in said seal means for discharging liquid leakage to the side of the valve.
Claim 7
Dependent Claim
36 words
A sampling device according to claim 1 wherein said body sections are generally disc-shaped and are generally concentrically mounted facing one another for rotation about a centrally disposed shaft which is slidably disposed through said sections.
References Cited (Backward Citations)
US2824859A
Cited
US3071005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |