Patent US3570525A successfully refreshed from Google Patents.
US3570525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stem-actuated tiltable valve
Assignee: Individual
•
Filing: 1969-04-21
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Granted: 1971-03-16
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Expires: 1989-04-21
Abstract
Abstract A bidirectional valve controls delivery of the normal fluid flow through a tubular passage and prevents backflow into the fluid source. For this purpose, axially spaced first and second valve seats are provided in the bore of the tube and a valve body, disposed between the seats, utilizes the supply pressure to normally urge its face portion into a closing position on the first seat. A manually operable, plunger-type stem actuator is used to tilt the valve body to open the first seat and permit delivery of the fluid, this actuator being slidably received in the tube to form a continuation of the tube bore. Preferably the actuator is a separate member facilitating its removal for replacement or sterilization purposes. The second valve seat normally is open during delivery but immediately closed by backflow pressure such as may be produced by sudden pressure failures in the upstream delivery system. In one embodiment the valve body has s single valve face reciprocately movable between the seats in response to the fluid pressure. Another embodiment employs a pair of valve faces both of which are resiliently held against both seats to block delivery flow. When the stem actuator tiltably opens the first seat, the delivery pressure tiltably opens the second. Back pressure causes the second seat to immediately close, the force of the closing action being supplemented by the resiliency of the arrangement.
Inventors
- 👤 Adolph W Borsum
- 👤 William K Borsum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:23
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/02; A61C17/0202; A61H; A61H13/00; A61H13/005; F; F16; F16K; F16K43/00; F16K43/005; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/613
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
209 words
Stem-actuated tiltable valve apparatus for bidirectionally controlling flow from and backflow into a fluid source, said apparatus comprising: a tubular body member having an upstream and adapted to be coupled to said fluid source and a downstream end; a sleevelike stem actuator reciprocably mounted in the bore of said tubular member and projecting outwardly of its downstream end; first and second valve seats disposed in the bore of said tubular member in an axially spaced arrangement, said first valve seat being disposed in said downstream end in proximity with the inner end of said stem actuator; and a valve means mounted in said bore, said means having a pair of valve faces disposed between said seats, said valve means normally being urged into closing engagement with said first seat and also being movable from an opened to a closed position relative to saiD second seat in response to backflow pressure; said stem actuator being reciprocably movable into and out of engagement with said valve means and the actuator having its inner end formed for directly engaging and tilting said valve means into an open position relative to said first seat; whereby said valve apparatus can be tiltably opened against said upstream pressure and also automatically closed by backflow pressure.
Claim 2
Dependent Claim
209 words
Stem-actuated tiltable valve apparatus for bidirectionally controlling flow from and backflow into a fluid source, said apparatus comprising: a tubular body member having an upstream and adapted to be coupled to said fluid source and a downstream end; a sleevelike stem actuator reciprocably mounted in the bore of said tubular member and projecting outwardly of its downstream end; first and second valve seats disposed in the bore of said tubular member in an axially spaced arrangement, said first valve seat being disposed in said downstream end in proximity with the inner end of said stem actuator; and a valve means mounted in said bore, said means having a pair of valve faces disposed between said seats, said valve means normally being urged into closing engagement with said first seat and also being movable from an opened to a closed position relative to saiD second seat in response to backflow pressure; said stem actuator being reciprocably movable into and out of engagement with said valve means and the actuator having its inner end formed for directly engaging and tilting said valve means into an open position relative to said first seat; whereby said valve apparatus can be tiltably opened against said upstream pressure and also automatically closed by backflow pressure.
Claim 3
Dependent Claim
38 words
The apparatus of claim 1 wherein said valve means is wholly contained in said bore beneath said first valve seat whereby in a closed position with said first seat the valve means extends entirely in an upstream direction.
Claim 4
Dependent Claim
122 words
The apparatus of claim 1 wherein: the one end of the stem actuator is transversely slanted and notched providing, when viewed in longitudinal cross section, a longer arm and a shorter arm, the longer arm being adapted to tilt the valve body from total engagement with the first valve seat; and the valve means having as a tilting fulcrum that portion of the first valve seat adjacent the shorter arm, such that in an open position said tilted valve means is balanced between a force applied in an upstream direction by the longer arm of the stem actuator and a combined force applied in a downstream direction by the fluid flow around the valve means and the fluid within the fluid source.
Claim 5
Dependent Claim
35 words
The apparatus of claim 1 including an annular flange carried by said outwardly projecting portion of said stem actuator for facilitating the application of finger forces to cause longitudinal and rotational movement of said actuator.
Claim 6
Dependent Claim
63 words
The apparatus of claim 1 wherein said valve means is floatably mounted for reciprocable movement between said seats, said valve means including a conical member for guiding said floating movement and said valve means being urged into closing engagement with said first seat by upstream fluid pressure and also being moved into closing engagement with the second seat by said backflow downstream pressure.
Claim 7
Dependent Claim
22 words
The apparatus of claim 5 further including resilient means engaging said valve means for augmenting its reciprocable movement into a seat-closing position.
Claim 8
Dependent Claim
53 words
The apparatus of claim 1 wherein said valve means is formed of: first and second valve face members for respectively closing said first and second valve seats; and compressively resilient means engaging both of said face members for normally urging both face members into closing engagement with said first and second valve seats.
Claim 9
Dependent Claim
38 words
The apparatus of claim 7 wherein: said face members are disc-shaped members; and said resilient means is a flexible shaft medially engaging each of said disc-shaped face members and extending between the face members axially of said bore.
References Cited (Backward Citations)
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |