US3774442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle sampling devices
Assignee: SNA Europe Industries AB
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Filing: 1972-01-05
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Granted: 1973-11-27
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Expires: 1992-01-05
Abstract
Abstract A device for taking a sample of particles from a flow of gas in a gas duct includes a handle carrying a front portion for insertion in said gas duct in the sampling operation, including a nose portion having an inlet opening for facing the gas flow, a through flow body through which extends a diffusor shaped channel extending from the inlet opening to a screen filter coupled to the down-stream end of said through flow body, and a valve including a cock inserted transversely in said diffusor channel and having an axis of rotation perpendicular to said diffusor channel and parallel to said handle. The handle carries an operating rod parallel to said valve cock rotation axis and connected between said valve cock and an operating knob on said handle for varying said cock between a first position providing no resistance to gas flow through said diffusor channel and a second position closing said diffusor channel to said gas flow. The handle further supports a first tube having an inlet in said diffusor channel between the inlet opening of said nose portion and said valve and an outlet providing a measure of static pressure of gas flow in said diffusor channel, and a second tube having an inlet in said front portion to said gas duct and an outlet providing a measure of static pressure in said gas duct.
Inventors
- 👤 K Gustavsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:23
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N1/2202; G01N2001/222; G01N2001/2223; G01N2001/225
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
286 words
A device for taking a sample of particles from flow of gas in a gas duct and provided with a front end portion which is intended to be inserted in the gas duct during the sampling operation, characterized in that the front end portion comprises a through-flow body through which extends a diffusor-shaped channel and which can be oriented to the gas duct with the longitudinal axis of the diffusor channel parallel to the flow direction of the gas therethrough, said diffusor channel extending from a nose portion of said front end portion provided with an inlet opening facing the gas flow, the inlet opening being arranged to take in a part of said gas flow in said duct, said part gas flow passing through the diffusor channel to a screen filter on the down-stream end of The through-flow body and through which filter the part gas flow is returned to the gas duct, an adjustable valve in the diffusor channel for controlling the velocity of the part gas flow in the diffusor channel, and two channels connected with two measuring outlets located on a portion of said device which during the sampling operation is positioned externally of the gas passage, one of said two channels providing communication between one of said outlets and an opening to the diffusor channel located between the inlet opening of the nose portion and the valve for measuring the static pressure of the part gas flow through said diffusor channel, and the second of said two channels providing communication between an opening in said front portion with the gas flow in said gas duct and the other of said measuring outlets for measuring the static pressure in the gas duct.
Claim 2
Independent Claim
286 words
A device for taking a sample of particles from flow of gas in a gas duct and provided with a front end portion which is intended to be inserted in the gas duct during the sampling operation, characterized in that the front end portion comprises a through-flow body through which extends a diffusor-shaped channel and which can be oriented to the gas duct with the longitudinal axis of the diffusor channel parallel to the flow direction of the gas therethrough, said diffusor channel extending from a nose portion of said front end portion provided with an inlet opening facing the gas flow, the inlet opening being arranged to take in a part of said gas flow in said duct, said part gas flow passing through the diffusor channel to a screen filter on the down-stream end of The through-flow body and through which filter the part gas flow is returned to the gas duct, an adjustable valve in the diffusor channel for controlling the velocity of the part gas flow in the diffusor channel, and two channels connected with two measuring outlets located on a portion of said device which during the sampling operation is positioned externally of the gas passage, one of said two channels providing communication between one of said outlets and an opening to the diffusor channel located between the inlet opening of the nose portion and the valve for measuring the static pressure of the part gas flow through said diffusor channel, and the second of said two channels providing communication between an opening in said front portion with the gas flow in said gas duct and the other of said measuring outlets for measuring the static pressure in the gas duct.
Claim 3
Dependent Claim
97 words
A device according to claim 1, characterized in that the valve comprises a cock inserted transversely to the diffusor channel and having a through-flow opening defined by the wall of the valve body which approximately conforms to the configuration of the diffusor channel, the cock having a first position forming a practically resistance free passage for the part gas flow when the valve is fully open the cock being rotatable to a second position wherein said cock interrupts said part gas flow through said diffusor channel, the valve being continuously adjustable between said first and second positions.
Claim 4
Dependent Claim
26 words
A device according to claim 2, including valve control means located on the portion located externally of the gas duct when a sample is being taken.
Claim 5
Dependent Claim
39 words
A device according to claim 1 wherein the portion positioned externally of the gas duct comprises a tubular shank member carrying the through-flow body and supporting means for adjusting said valve from a location external to said gas duct.
Claim 6
Dependent Claim
42 words
A device according to claim 4, characterized in that the tubular member encloses an operating rod coupling a knob located on the external end of the tubular member and the valve so that the valve can be adjusted by rotating the knob.
Claim 7
Dependent Claim
30 words
A device according to claim 5, including a scale and an indicator means mechanically linked with the knob to allow the setting position of the valve to be read off.
Claim 8
Dependent Claim
55 words
A device according to claim 5 characterized in that the valve is located at the point where the tubular shank member is connected to the through-flow body, the cock of the valve having an axis of rotation in the longitudinal axis of the operating rod and being connected to the operating rod in non-rotational relationship.
Claim 9
Dependent Claim
72 words
A device according to claim 1 characterized in that the screen filter is in the form of a bag, the rim of said bag being secured around the down-stream end of the through-flow body, said bag being encircled in spaced relationship by a tube terminating the through-flow body and provided with an outlet opening for the part gas flow received in the diffusor channel from the inlet opening of the nose portion.
Claim 10
Independent Claim
237 words
A device for taking a sample of particles from a flow of gas in a gas duct and including a handle, a front portion carried on said handle for insertion in said gas duct in the sampling operation, said front portion including a nose portion having an inlet opening for facing the gas flow, a through flow body through which extends a diffusor shaped channel extending from said inlet opening to a screen filter coupled to the downstream end of said through flow body, and a valve including a cock inserted transversely in said diffusor channel and having an axis of rotation perpendicular to said fiffusor channel and parallel to said handle, said handle carrying an operating rod parallel to said valve cock rotation axis and connected between said valve cock and an operating knob on said handle for varying said cock between a first position providing no resistance to gas flow through said diffusor channel and a second position closing said diffusor channel to said gas flow, said handle furtHer supporting a first tube having an inlet in said diffusor channel between the inlet opening of said nose portion and said valve and an outlet providing a measure of static pressure of gas flow in said diffusor channel, and a second tube having an inlet in said front portion to said gas duct and an outlet providing a measure of static pressure in said gas duct.
Claim 11
Independent Claim
237 words
A device for taking a sample of particles from a flow of gas in a gas duct and including a handle, a front portion carried on said handle for insertion in said gas duct in the sampling operation, said front portion including a nose portion having an inlet opening for facing the gas flow, a through flow body through which extends a diffusor shaped channel extending from said inlet opening to a screen filter coupled to the downstream end of said through flow body, and a valve including a cock inserted transversely in said diffusor channel and having an axis of rotation perpendicular to said fiffusor channel and parallel to said handle, said handle carrying an operating rod parallel to said valve cock rotation axis and connected between said valve cock and an operating knob on said handle for varying said cock between a first position providing no resistance to gas flow through said diffusor channel and a second position closing said diffusor channel to said gas flow, said handle furtHer supporting a first tube having an inlet in said diffusor channel between the inlet opening of said nose portion and said valve and an outlet providing a measure of static pressure of gas flow in said diffusor channel, and a second tube having an inlet in said front portion to said gas duct and an outlet providing a measure of static pressure in said gas duct.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |