US4605041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Individual
•
Filing: 1985-04-05
•
Granted: 1986-08-12
•
Expires: 2005-04-05
Abstract
Abstract A check valve comprising a valve body with a bore and a counterbore, an insert inside the counterbore, and a flapper with a flapper pin is disclosed. The flapper pin is mounted in a recess in the inside face of the insert. A spring for biasing the flapper toward the closed position is located in a recess in the counterbore face of the valve body.
Inventors
- 👤 Henry E. Teumer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:34
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0209; F16K27/0227; F16K27/0232; F16K15/00; F16K15/02; F16K15/03; F16K15/033; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857; Y10T137/7898
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
235 words
A check valve comprising: (a) a valve body having a bore therethrough for the flow of fluid and in the bore a counterbore whose diameter is larger than that of the bore, the counterbore having a counterbore periphery and a counterbore face inside the valve body, the counterbore face being at an angle to the axis of the bore, the counterbore face having a biasing means recess; (b) an insert contained at least partially in the counterbore, the insert having (i) a bore therethrough for the flow of fluid, (ii) an outer periphery that corresponds to and mates with the counterbore periphery, and (iii) an inner face that corresponds to the counterbore face, the inner face having a flapper pin recess; (c) a flapper having a flapper pin, the flapper pin being rotatably mounted in the flapper pin recess of the insert so that the flapper can rotate between open and closed positions, the closed position blocking the bore of the insert to prevent substantially the flow of fluid through the bore; (d) biasing means mounted in the biasing means recess of the valve body to bias the flapper towards the closed position; and (e) blocking means inside the valve for blocking the flapper pin recess to prevent the flapper pin from leaving the flapper pin recess and for blocking the biasing means recess to prevent the biasing means from leaving the biasing means recess.
Claim 2
Dependent Claim
235 words
A check valve comprising: (a) a valve body having a bore therethrough for the flow of fluid and in the bore a counterbore whose diameter is larger than that of the bore, the counterbore having a counterbore periphery and a counterbore face inside the valve body, the counterbore face being at an angle to the axis of the bore, the counterbore face having a biasing means recess; (b) an insert contained at least partially in the counterbore, the insert having (i) a bore therethrough for the flow of fluid, (ii) an outer periphery that corresponds to and mates with the counterbore periphery, and (iii) an inner face that corresponds to the counterbore face, the inner face having a flapper pin recess; (c) a flapper having a flapper pin, the flapper pin being rotatably mounted in the flapper pin recess of the insert so that the flapper can rotate between open and closed positions, the closed position blocking the bore of the insert to prevent substantially the flow of fluid through the bore; (d) biasing means mounted in the biasing means recess of the valve body to bias the flapper towards the closed position; and (e) blocking means inside the valve for blocking the flapper pin recess to prevent the flapper pin from leaving the flapper pin recess and for blocking the biasing means recess to prevent the biasing means from leaving the biasing means recess.
Claim 3
Dependent Claim
32 words
The check valve of claim 1 wherein the means for blocking the flapper pin recess and the biasing means recess is a retainer that lies between the insert and the counterbore face.
Claim 4
Dependent Claim
31 words
The check valve of claim 1 wherein the means for blocking the flapper pin recess and the biasing means recess comprises the inner face of the insert and the counterbore face.
Claim 5
Dependent Claim
13 words
The check valve of claim 1 wherein the biasing means is a spring.
Claim 6
Dependent Claim
229 words
A check valve comprising: (a) a valve body having a bore therethrough for the flow of fluid and in the bore a counterbore whose diameter is larger than that of the bore, the counterbore having a counterbore periphery and a counterbore face inside the valve body, the counterbore face being at an angle to the axis of the bore, the counterbore face having a spring recess; (b) an insert contained at least partially in the counterbore, the insert having (i) a bore therethrough for the flow of fluid, (ii) an outer periphery that corresponds to and mates with the counterbore periphery, and (iii) an inner face that corresponds to and is adjacent to the counterbore face, the inner face having a flapper pin recess; (c) a flapper having a flapper pin, the flapper pin being rotatably mounted in the flapper pin recess of the insert so that the flapper can rotate between open and closed positions, the closed position blocking the bore of the insert to prevent substantially the flow of fluid through the bore, the counterbore face blocking at least part of the flapper pin recess to prevent the flapper pin from leaving the flapper pin recess; and (d) a spring mounted in the spring recess of the valve body to bias the flapper towards the closed position, the insert preventing the spring from leaving the spring recess.
Claim 7
Dependent Claim
229 words
A check valve comprising: (a) a valve body having a bore therethrough for the flow of fluid and in the bore a counterbore whose diameter is larger than that of the bore, the counterbore having a counterbore periphery and a counterbore face inside the valve body, the counterbore face being at an angle to the axis of the bore, the counterbore face having a spring recess; (b) an insert contained at least partially in the counterbore, the insert having (i) a bore therethrough for the flow of fluid, (ii) an outer periphery that corresponds to and mates with the counterbore periphery, and (iii) an inner face that corresponds to and is adjacent to the counterbore face, the inner face having a flapper pin recess; (c) a flapper having a flapper pin, the flapper pin being rotatably mounted in the flapper pin recess of the insert so that the flapper can rotate between open and closed positions, the closed position blocking the bore of the insert to prevent substantially the flow of fluid through the bore, the counterbore face blocking at least part of the flapper pin recess to prevent the flapper pin from leaving the flapper pin recess; and (d) a spring mounted in the spring recess of the valve body to bias the flapper towards the closed position, the insert preventing the spring from leaving the spring recess.
Claim 8
Dependent Claim
38 words
The check valve of claim 5 wherein the spring has a coil portion and a spring pin through the coil portion, at least part of the spring pin and the coil portion being mounted in the spring recess.
Claim 9
Dependent Claim
52 words
The check valve of claim 5 wherein the counterbore periphery and the insert outer periphery have the shape of the curved portion of a frustum of a cone so that when insert is forced towards the counterbore face the seal between the counterbore periphery and the insert outer periphery tends to increase.
Claim 10
Dependent Claim
256 words
A check valve comprising: (a) a valve body having a bore therethrough for the flow of fluid and in the bore a counterbore whose diameter is larger than that of the bore, the counterbore having a counterbore periphery and a counterbore face inside the valve body, the counterbore face being at an angle to the axis of the bore, the counterbore face having a spring recess; (b) an insert contained at least partially in the counterbore, the insert having (i) a bore therethrough for the flow of fluid, (ii) an outer periphery that corresponds to and mates with the counterbore periphery, and (iii) an inner face that corresponds to the counterbore face, the inner face having a flapper pin recess; (c) a flapper having a flapper pin, the flapper pin being rotatably mounted in the flapper pin recess of the insert so that the flapper can rotate between open and closed positions, the closed position blocking the bore of the insert to prevent substantially the flow of fluid through the bore; (d) a spring mounted in the spring recess of the valve body to bias the flapper towards the closed position; and (e) a retainer between the inner face of the insert and the counterbore face, the retainer having two faces, one face being adjacent to the inner face of the insert so as to block the flapper pin from leaving the flapper pin recess and the other face being adjacent to the counterbore face so as to block the spring pin from leaving its recess.
Claim 11
Dependent Claim
256 words
A check valve comprising: (a) a valve body having a bore therethrough for the flow of fluid and in the bore a counterbore whose diameter is larger than that of the bore, the counterbore having a counterbore periphery and a counterbore face inside the valve body, the counterbore face being at an angle to the axis of the bore, the counterbore face having a spring recess; (b) an insert contained at least partially in the counterbore, the insert having (i) a bore therethrough for the flow of fluid, (ii) an outer periphery that corresponds to and mates with the counterbore periphery, and (iii) an inner face that corresponds to the counterbore face, the inner face having a flapper pin recess; (c) a flapper having a flapper pin, the flapper pin being rotatably mounted in the flapper pin recess of the insert so that the flapper can rotate between open and closed positions, the closed position blocking the bore of the insert to prevent substantially the flow of fluid through the bore; (d) a spring mounted in the spring recess of the valve body to bias the flapper towards the closed position; and (e) a retainer between the inner face of the insert and the counterbore face, the retainer having two faces, one face being adjacent to the inner face of the insert so as to block the flapper pin from leaving the flapper pin recess and the other face being adjacent to the counterbore face so as to block the spring pin from leaving its recess.
Claim 12
Dependent Claim
38 words
The check valve of claim 8 wherein the spring has a coil portion and a spring pin through the coil portion, at least part of the spring pin and the coil portion being mounted in the spring recess.
Claim 13
Dependent Claim
52 words
The check valve of claim 8 wherein the counterbore periphery and the insert outer periphery have the shape of the curved portion of a frustum of a cone so that when insert is forced towards the counterbore face the seal between the counterbore periphery and the insert outer periphery tends to increase.
References Cited (Backward Citations)
US1325568A
Cited
US542417A
Cited
US846317A
Cited
USRE21334E
Cited
US21334A
Cited
US705255A
Cited
US891012A
Cited
US922262A
Cited
US1505958A
Cited
US1673831A
Cited
US1742043A
Cited
US2089141A
Cited
US2268806A
Cited
US2265596A
Cited
US2342485A
Cited
US2482198A
Cited
US2532067A
Cited
US2664264A
Cited
US2657824A
Cited
US2767735A
Cited
US2918934A
Cited
US2930400A
Cited
US3008650A
Cited
US3016914A
Cited
US3066693A
Cited
US3038494A
Cited
US3023771A
Cited
US3128785A
Cited
US3131719A
Cited
US3144876A
Cited
US3363645A
Cited
US3370305A
Cited
US3482603A
Cited
US3509908A
Cited
GB1214619A
Cited
US3933173A
Cited
US3705602A
Cited
US3613720A
Cited
US3604453A
Cited
US3762438A
Cited
US3726341A
Cited
US3720228A
Cited
US3817277A
Cited
FR2216496A1
Cited
US4054153A
Cited
US3990471A
Cited
US4075832A
Cited
US3937441A
Cited
US3974848A
Cited
US4039004A
Cited
US4128111A
Cited
US4114202A
Cited
US4196745A
Cited
US4508139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |