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US3733907A Expired / Lapsed US ⏱️ 0.0 years remaining

Valve structure for collecting multiple samples

Assignee: Varian Medical Systems Inc

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Filing: 1972-01-24

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Granted: 1973-05-22

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Expires: 1992-01-24

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Abstract

Abstract A valve structure for collecting multiple samples of a fluid comprises a housing forming an inlet chamber and an outlet chamber separated by a valve seat partition between the chambers. The partition has a first central passage therethrough and a second passage therethrough radially outward of the first passage. A valve is located in the inlet chamber and seats against the partition to close one side of each of said passages. In the outlet chamber a first valve seats against the partition to close the other end of said center passage. A third valve is located in said outlet chamber to seat against said partition and close the other end of said outward passage. The first valve has an annular recess in its face which communicates with said outward passage and together with said outward passage forms a large sample collecting volume. The center passage forms a small sample collecting volume. Means are provided for opening and then closing the first valve to fill both of said sample collecting volumes with sample gas while the second and third valves are closed. The operating structure then provides for opening the second valve to release the small sample collecting volume for transmission to a leak detector. If the small volume does not contain enough leak gas to register on the leak detector, the third valve is opened to release the large sample collecting volume to the leak detector.

Inventors

👤 W Briggs

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-24 09:16

CPC Classifications

G; G01; G01N; G01N1/00; G01N1/02; G01N1/22

Claims Analysis

Total Claims: 10

Claim 1

Independent Claim 97 words

Valve structure for collecting multiple samples, comprising a housing forming two valve chambers and a partition between said chambers, said partition having first and second passages therethrough, a first valve in a first one of said chambers seating against said partition to close one side of each of said first and second passages, a second valve in the second one of said chambers seating against said partition to close the other side of said first passage, and a third valve in said second chamber seating against said partition to close the other side of said second passage.

Claim 2

Dependent Claim 97 words

Claim 3

Dependent Claim 46 words

A valve structure as claimed in claim 1 in which said first valve has a recess in its face which communicates with said second passage and together with said second passage forms a sample collecting volume which is larger than the volume of said first passage.

Claim 4

Dependent Claim 19 words

A valve structure as claimed in claim 1 in which one of said passages is larger than the other.

Claim 5

Dependent Claim 125 words

A valve structure as claimed in claim 1 in which one of said valve chambers is an inlet chamber and the other is an outlet chamber, said first valve is in said inlet chamber and said second and third valves are in said outlet chamber, said first passage is centrally located in said partition and said second passage is located radially outward of the first passage, said second valve closes said first passage and said third valve closes said second passage, said second valve being slidingly received in said third valve, abutment means on said third valve engageable by abutment means on said second valve to open said third valve upon opening movement of the second valve beyond initial opening movement of the second valve.

Claim 6

Dependent Claim 69 words

A valve structure as claimed in claim 4 further comprising a first actuating rod attached to said first valve, a connector attached to said first actuating rod by a lost motion connection, a second actuating rod connected to said second valve, an actuator bar connected to said second actuating rod, and said actuator bar being engageable by said connector when said connector moves relative to said first actuating rod.

Claim 7

Dependent Claim 21 words

A valve structure as claimed in claim 5 in which said three valves are all biased to closed position by springs.

Claim 8

Dependent Claim 41 words

A valve structure as claimed in claim 1 in which meanS are provided for opening said first valve while said second and third valves are closed and for sequentially opening said second and third valves while said first valve is closed.

Claim 9

Dependent Claim 21 words

A valve structure as claimed in claim 7 in which said three valves are all biased to closed positions by springs.

Claim 10

Dependent Claim 35 words

A valve structure as claimed in claim 8 in which said first and second valves are interconnected by a lost motion connection and said second and third valves are interconnected by a lost motion connection.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-05-21	1976-11-20	1977-05-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-05-21	1980-11-20	1981-05-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-05-21	1984-11-20	1985-05-22	$7700.00	Window Closed / Lapsed

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