US3835878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutoff valve with leak indicating means
Assignee: Individual
•
Filing: 1973-02-02
•
Granted: 1974-09-17
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Expires: 1993-02-02
Abstract
Abstract Leaks between the valve head and the valve seat of a shutoff valve are detected by providing an air containing housing attached to the valve head and moving therewith into a shut position in respect of a valve seat. The air pressure in the housing increases during the valve shutting movement and a chamber closed by engagement of the valve head and the valve seat when the valve is shut is in communication with the interior of the housing and the exterior of the valve so that pressure changes due to a leak between the valve seat and valve head may be measured.
Inventors
- 👤 J Figl
- 👤 H Braidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:46
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2876; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4379; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
200 words
A shutoff valve comprising 1. a valve housing having a fluid inlet and fluid outlet, a. the housing defining a valve chamber between the inlet and outlet; 2. a valve seat in the valve chamber; 3. a valve head mounted in the valve chamber for movement between an open and shut position, the valve head being spaced from the valve seat in the open position and being in engagement with the valve seat in the shut position; 4. a fluid medium containing housing attached to the valve head for movement therewith; 5. means for changing the fluid medium pressure in the fluid medium containing housing in response to the closing movement of the valve head and maintaining the pressure at a predetermined level; 6. means including the valve seat and valve head contacting surfaces, and effective upon engagement of the valve head with the valve seat for receiving the fluid medium pressure from the fluid medium containing housing whereby any leak between the valve seat and the valve head reduces the pressure of the medium from the predetermined level; and conduit means in the valve housing for transmitting the pressure from the latter means to the outside of valve housing.
Claim 2
Dependent Claim
200 words
A shutoff valve comprising 1. a valve housing having a fluid inlet and fluid outlet, a. the housing defining a valve chamber between the inlet and outlet; 2. a valve seat in the valve chamber; 3. a valve head mounted in the valve chamber for movement between an open and shut position, the valve head being spaced from the valve seat in the open position and being in engagement with the valve seat in the shut position; 4. a fluid medium containing housing attached to the valve head for movement therewith; 5. means for changing the fluid medium pressure in the fluid medium containing housing in response to the closing movement of the valve head and maintaining the pressure at a predetermined level; 6. means including the valve seat and valve head contacting surfaces, and effective upon engagement of the valve head with the valve seat for receiving the fluid medium pressure from the fluid medium containing housing whereby any leak between the valve seat and the valve head reduces the pressure of the medium from the predetermined level; and conduit means in the valve housing for transmitting the pressure from the latter means to the outside of valve housing.
Claim 3
Dependent Claim
7 words
a valve seat in the valve chamber;
Claim 4
Dependent Claim
7 words
a valve seat in the valve chamber;
Claim 5
Dependent Claim
111 words
The shutoff valve of claim 1, wherein the fluid medium containing housing is comprised of the valve head, an end wall aligned with, and spaced from the valve head, and a bellows side wall interconnecting the valve head and the end wall, a valve stem being reciprocably mounted in the valve housing and being attached to the end wall for effectuating the movement of the valve head whereby the bellows side wall provides for an expansion and contraction of the fluid medium containing housing to constitute the means for changing the pressure, and a compression spring mounted in the fluid medium containing housing between the valve head and the end wall.
Claim 6
Dependent Claim
45 words
The shutoff valve of claim 2, further comprising a bracket including a shoulder attached to the end wall, a neck portion including a flange attached to the valve head, the flange freely resting on the shoulder for suspending the valve head from the end wall.
Claim 7
Dependent Claim
41 words
a valve head mounted in the valve chamber for movement between an open and shut position, the valve head being spaced from the valve seat in the open position and being in engagement with the valve seat in the shut position;
Claim 8
Dependent Claim
41 words
a valve head mounted in the valve chamber for movement between an open and shut position, the valve head being spaced from the valve seat in the open position and being in engagement with the valve seat in the shut position;
Claim 9
Dependent Claim
13 words
a fluid medium containing housing attached to the valve head for movement therewith;
Claim 10
Dependent Claim
13 words
a fluid medium containing housing attached to the valve head for movement therewith;
Claim 11
Dependent Claim
47 words
The shutoff valve of claim 1, wherein the means for receiving the pressure comprises a second seat concentric about the valve seat, the seats defining a chamber therebetween, the chamber being in communication with the interior of the fluid medium containing housing and with the conduit means.
Claim 12
Dependent Claim
31 words
means for changing the fluid medium pressure in the fluid medium containing housing in response to the closing movement of the valve head and maintaining the pressure at a predetermined level;
Claim 13
Dependent Claim
31 words
means for changing the fluid medium pressure in the fluid medium containing housing in response to the closing movement of the valve head and maintaining the pressure at a predetermined level;
Claim 14
Dependent Claim
76 words
means including the valve seat and valve head contacting surfaces, and effective upon engagement of the valve head with the valve seat for receiving the fluid medium pressure from the fluid medium containing housing whereby any leak between the valve seat and the valve head reduces the pressure of the medium from the predetermined level; and conduit means in the valve housing for transmitting the pressure from the latter means to the outside of valve housing.
Claim 15
Dependent Claim
76 words
means including the valve seat and valve head contacting surfaces, and effective upon engagement of the valve head with the valve seat for receiving the fluid medium pressure from the fluid medium containing housing whereby any leak between the valve seat and the valve head reduces the pressure of the medium from the predetermined level; and conduit means in the valve housing for transmitting the pressure from the latter means to the outside of valve housing.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |