US4840074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stream fluid sampling valve
Assignee: Thermo Fisher Scientific Inc
•
Filing: 1988-03-31
•
Granted: 1989-06-20
•
Expires: 2008-03-31
Abstract
Abstract The invention provides a sample valve adapted to produce a sample of any one of a plurality of fluid streams for an analytical instrument (especially a mass spectrometer). It comprises a stationary plate member in which are formed a plurality of inlet ports. A sampling head is mounted from a drive shaft which is rotated to select one of the inlet ports. A sample of the fluid flowing through the selected inlet is taken by a narrow-bore pipe and is transferred via a rotary shaft sealing means to a stationary output member. Excess gas from the selected inlet port passes inside a sleeve member in the sampling head and into a purging chamber adjacent to the exterior of the sealing means, thereby minimizing contamination of the sample through a leak in the sealing means.
Inventors
- 👤 Paul A. Jessop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:09
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/26
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
164 words
A valve for providing a sample from any of a plurality of streams of fluid (,) comprising: a) movable selecting means for selecting one of said plurality of streams while allowing the unselected ones of said streams to discharge; b) sample dividing means for dividing the selected one of said streams into a sample flow portion and a purging flow portion; c) a stationary output member; d) a transfer member movable with said selecting means and adapted to convey said sample flow portion from said selecting means to said stationary output member; e) sealing means for connecting said transfer member to said output member and adapted to confine substantially all of said sample flow portion to its interior; f) a movable seal housing in which said sealing means is disposed and in which is formed a purging chamber adjacent to at least a part of the exterior of said sealing means, and g) means for passing said purging flow portion through said purging chamber.
Claim 2
Dependent Claim
164 words
A valve for providing a sample from any of a plurality of streams of fluid (,) comprising: a) movable selecting means for selecting one of said plurality of streams while allowing the unselected ones of said streams to discharge; b) sample dividing means for dividing the selected one of said streams into a sample flow portion and a purging flow portion; c) a stationary output member; d) a transfer member movable with said selecting means and adapted to convey said sample flow portion from said selecting means to said stationary output member; e) sealing means for connecting said transfer member to said output member and adapted to confine substantially all of said sample flow portion to its interior; f) a movable seal housing in which said sealing means is disposed and in which is formed a purging chamber adjacent to at least a part of the exterior of said sealing means, and g) means for passing said purging flow portion through said purging chamber.
Claim 3
Dependent Claim
28 words
A valve as claimed in claim 1 adapted to provide a sample for analysis by a mass spectrometer from any one of a plurality of streams of gases.
Claim 4
Dependent Claim
83 words
A valve as claimed in claim 1 (in which) further comprising a stationary plate member having a plurality of ports to which the streams of fluid to be sampled are connected, and wherein said selecting means comprises a movable sampling head capable of being positioned in alignment with any one of a plurality of said plate member ports, a sleeve member slidable mounted in said sampling head, and means for maintaining said sleeve member in substantially sealing contact with said stationary plate member.
Claim 5
Dependent Claim
64 words
A valve according to claim 3 in which said sample dividing means comprises a first tube member disposed inside said sleeve member and terminating adjacent said stationary plate member, said sample flow portion flows through said first tube member and subsequently to said transfer member, and said purging flow portion flows inside said sleeve member and around the exterior of said first tube member.
Claim 6
Dependent Claim
65 words
A valve as claimed in claim 1 in which said seal housing is connected to a hollow rotatable drive shaft, at least a part of said output member is disposed within said drive shaft, and said selecting means is connected to said drive shaft by a rigid second tube member which conveys said purging flow portion from said sample dividing means to said purging chamber.
Claim 7
Dependent Claim
65 words
A valve as claimed in claim 3 in which said seal housing is connected to a hollow rotatable drive shaft, at least a part of said output member is disposed within said drive shaft, and said sampling head is connected to said drive shaft by a rigid second tube member which conveys said purging flow portion from said sample dividing means to said purging chamber.
Claim 8
Dependent Claim
64 words
A valve according to claim 4 in which said seal housing is connected to a hollow rotatable drive shaft, at least a part of said output member is disposed within said drive shaft, and said sampling head is connected to said drive shaft by a rigid second tube member which conveys said purging flow portion from inside said sleeve member to said purging chamber.
Claim 9
Dependent Claim
41 words
A valve according to claim 1 in which said output member extends into said purging chamber and in which there is provided a sealing means in a wall of said purging chamber which sealingly engages the exterior of said output member.
Claim 10
Dependent Claim
42 words
A valve according to claim 5 in which said output member extends into said purging chamber and in which there is provided a rotary sealing means in a wall of said purging chamber which sealingly engages the exterior of said output member.
Claim 11
Dependent Claim
42 words
A valve according to claim 6 in which said output member extends into said purging chamber and in which there is provided a rotary sealing means in a wall of said purging chamber which sealingly engages the exterior of said output member.
Claim 12
Dependent Claim
42 words
A valve according to claim 7 in which said output member extends into said purging chamber and in which there is provided a rotary sealing means in a wall of said purging chamber which sealingly engages the exterior of said output member.
Claim 13
Dependent Claim
32 words
A valve according to claim 1 in which a hollow elongated exit member is provided on said seal housing, through which exit member said purging flow passes on leaving said purging chamber.
Claim 14
Dependent Claim
43 words
A valve according to claim 1 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber.
Claim 15
Dependent Claim
43 words
A valve according to claim 12 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber.
Claim 16
Dependent Claim
58 words
A valve according to claim 3 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber, and in which said housing comprises at least a part of said stationary plate member.
Claim 17
Dependent Claim
58 words
A valve according to claim 4 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber, and in which said housing comprises at least a part of said stationary plate member.
Claim 18
Dependent Claim
58 words
A valve according to claim 6 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber, and in which said housing comprises at least a part of said stationary plate member.
Claim 19
Dependent Claim
58 words
A valve according to claim 7 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber, and in which said housing comprises at least a part of said stationary plate member.
Claim 20
Dependent Claim
58 words
A valve according to claim 10 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber, and in which said housing comprises at least a part of said stationary plate member.
Claim 21
Dependent Claim
58 words
A valve according to claim 11 which is disposed in a substantially enclosed housing having an exit port for venting the unselected ones of said plurality of streams of fluid and said purging flow portion after it has passed through said purging chamber, and in which said housing comprises at least a part of said stationary plate member.
References Cited (Backward Citations)
US2721578A
Cited
DE1259605B
Cited
US3209343A
Cited
US3425446A
Cited
US3757583A
Cited
US3827302A
Cited
GB1334431A
Cited
US4113434A
Cited
US4156437A
Cited
US4601211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |