US3754568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Nupro Co
•
Filing: 1971-10-14
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Granted: 1973-08-28
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Expires: 1991-10-14
Abstract
Abstract The specification and drawings disclose poppet-type check valves each comprising a body with a through flow passage and a valve member with a generally circular sealing surface positioned within the passage. The valve member is continually biased toward a seat by a coil spring mounted in the passage. An O-ring positioned in a circumferential groove formed about the passage defines the seat. The groove is open only about the axial side facing the valve member. The inner circumference of the groove is of a lesser diameter than the sealing surface of the valve member. The O-ring is positioned within the groove and has a radial thickness sufficiently greater than the radial width of the groove such that when compressed in the groove, a portion extends out of the open side for engagement with the end face of the valve member. The radially inner wall of the groove is provided with a continuous edge surface which is adapted to engage the end face of the valve member to provide a fixed stop for the valve member. Means for varying the compression on the spring are provided and includes two members threaded axially in the passageway. Each of the members is shown as having a noncircular flow passageway formed through its center. The passageways align in certain positions of relative rotation for adjustment purposes. Thus, adjustment can be accomplished by insertion of an adjusting tool into the flow passage and no external adjustment members are required.
Inventors
- 👤 D Simko
- 👤 R Medvick
- 👤 B Gallagher
- 👤 E Shufflebarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:32
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/7868; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7931; Y10T137/7938
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
164 words
A valve comprising: a valve body including a valve chamber and flow inlet and outlet passages connecting said chamber to inlet and outlet openings; a seat in said chamber, a valve membEr continuously biased toward said seat by spring means; and, adjustment means for varying the force with which said spring means biases said valve member, said adjustment means including an adjustment member in engagement with said spring means and threaded in said outlet flow passage, a lock member threaded in said outlet flow passage for locking said adjustment member in desired positions, said adjustment member and said lock member having axially aligned flow openings of substantially equal size and non-circular configuration extending therethrough with each said flow opening being accessible from said outlet opening and the non-circular configuration of said flow openings providing means for receiving a tool in said adjustment member and said lock member whereby adjustment of said valve can be made through said outlet opening without disassembly of said valve.
Claim 2
Dependent Claim
164 words
A valve comprising: a valve body including a valve chamber and flow inlet and outlet passages connecting said chamber to inlet and outlet openings; a seat in said chamber, a valve membEr continuously biased toward said seat by spring means; and, adjustment means for varying the force with which said spring means biases said valve member, said adjustment means including an adjustment member in engagement with said spring means and threaded in said outlet flow passage, a lock member threaded in said outlet flow passage for locking said adjustment member in desired positions, said adjustment member and said lock member having axially aligned flow openings of substantially equal size and non-circular configuration extending therethrough with each said flow opening being accessible from said outlet opening and the non-circular configuration of said flow openings providing means for receiving a tool in said adjustment member and said lock member whereby adjustment of said valve can be made through said outlet opening without disassembly of said valve.
Claim 3
Dependent Claim
29 words
The valve as defined in claim 1 wherein said lock member and said adjustment member have external threads which mate with internal threads formed in said outlet flow passage.
Claim 4
Dependent Claim
24 words
The valve as defined in claim 1 wherein said spring means comprises a coil spring positioned between said valve member and said adjustment member.
Claim 5
Dependent Claim
26 words
The valve as defined in claim 3 wherein said lock member and said adjustment member are on the side of said valve member opposite said seat.
Claim 6
Dependent Claim
22 words
The valve as defined in claim 3 wherein said coil spring and said valve member are axially aligned with said valve seat.
Claim 7
Dependent Claim
21 words
The valve as defined in claim 3 wherein said outlet passage is axially aligned with said valve chamber and said seat.
Claim 8
Dependent Claim
16 words
The valve as defined in claim 1 wherein said outlet passage is aligned with said seat.
Claim 9
Dependent Claim
21 words
The valve as defined in claim 1 wherein said means for receiving a tool comprise flats formed in said flow openings.
Claim 10
Dependent Claim
33 words
The valve as defined in claim 1 wherein said adjustment member and said lock member have non-parallel faces which engage over a limited area when said lock member is in a lock position.
Claim 11
Dependent Claim
316 words
A valve comprising: a housing having a passage therethrough; a valve seat means spaced inwardly from a first end of said passage; a shoulder spaced inwardly from a second end of said passage; a valve member slidably mounted in said passage between said shoulder and said seat means, said valve member including an end face having an inclined peripheral edge adapted to sealingly engage said seat means and a tubular end extending toward said shoulder and adapted to engage said shoulder upon predetermined movement away from said seat, spring means mounted in said passages for maintaining said valve member continuously biased toward said seat means; said seat means including an axially open, circumferential recess facing said end face with and O-ring positioned therein and extending axially outwardly, said recess being defined by the wall of said passage and an insert member slidably received in said first end of said passage, said insert including a center bore and an axially extending flange portion which defines the radially inner wall of said recess and terminates in an end, the end of said flange portion having a circumferential lip extending toward the wall of said passage to restrict the axially open end of said recess and tightly enclose said O-ring throughout an extent of greater than 180 degrees of its cross-section to compress said O-ring and cause a portion thereof to extend axially out of said recess for sealingly engaging said peripheral edge, the end of said flange adapted to engage said end face to limit the compression applied to said O-ring by said valve member; thread means on said first end for releasably retaining said insert therein; and, cooperating surfaces on said insert and said wall of said passage between said recess and said lock means for limiting axially inward movement of said insert and providing a fluid seal between said insert and said wall of said passage.
Claim 12
Dependent Claim
316 words
A valve comprising: a housing having a passage therethrough; a valve seat means spaced inwardly from a first end of said passage; a shoulder spaced inwardly from a second end of said passage; a valve member slidably mounted in said passage between said shoulder and said seat means, said valve member including an end face having an inclined peripheral edge adapted to sealingly engage said seat means and a tubular end extending toward said shoulder and adapted to engage said shoulder upon predetermined movement away from said seat, spring means mounted in said passages for maintaining said valve member continuously biased toward said seat means; said seat means including an axially open, circumferential recess facing said end face with and O-ring positioned therein and extending axially outwardly, said recess being defined by the wall of said passage and an insert member slidably received in said first end of said passage, said insert including a center bore and an axially extending flange portion which defines the radially inner wall of said recess and terminates in an end, the end of said flange portion having a circumferential lip extending toward the wall of said passage to restrict the axially open end of said recess and tightly enclose said O-ring throughout an extent of greater than 180 degrees of its cross-section to compress said O-ring and cause a portion thereof to extend axially out of said recess for sealingly engaging said peripheral edge, the end of said flange adapted to engage said end face to limit the compression applied to said O-ring by said valve member; thread means on said first end for releasably retaining said insert therein; and, cooperating surfaces on said insert and said wall of said passage between said recess and said lock means for limiting axially inward movement of said insert and providing a fluid seal between said insert and said wall of said passage.
Claim 13
Dependent Claim
30 words
The valve as defined in claim 10 including adjustiNg means for varying the compression on said spring means, said adjusting means being accessible from the second end of said passage.
Claim 14
Dependent Claim
27 words
The valve as defined in claim 11 wherein said adjusting means includes a member threaded in the second end of said passage and engaging said spring means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |