US3884251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder-operated valve
Assignee: FMC Corp
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Filing: 1974-05-02
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Granted: 1975-05-20
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Expires: 1994-05-02
Abstract
Abstract A fluid flow control valve especially for fluid loading arms, the valve including a pneumatic or hydraulic powered cylinderpiston means to close it against whatever upstream pressure might be present, and to maintain it in fully closed condition during whatever pressure surges might occur. In one embodiment, the valve also includes a helically-wound coil spring that biases the valve''s closure element towards its closed position, causing it to close independently of actuation of the piston when the upstream pressure is below a predetermined value.
Inventors
- 👤 Houston W Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/36; F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; F16K17/30; F16K31/00; F16K31/12; F16K31/122; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/8807
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
238 words
In a fluid loading arm including at least one fluid product conduit connected to at least one pipe swivel joint for pivotal movement about the axis through said swivel joint, and a fluid pressure operated valve interconnected with the fluid product conduit in a position to control product flow therethrough, said valve including a valve body and a valve closure element secured to a valve stem for controlling flow through said valve body, the improvement comprising a. a fluid pressure responsive force means for operating said valve closure element, said force means comprising 1. a housing forming a portion of said valve body, 2. a piston rod slidably mounted in a wall of said housing and extending into said valve body towards said valve closure element, said piston rod having a longitudinal bore into which said valve stem slidably extends, 3. spring means surrounding said piston rod and said valve stem, said spring means extending between said valve closure element and said housing, said spring means biasing said element towards a position precluding flow through said valve, and 4. means for tranSmitting fluid pressure to said piston rod to cause said rod to move toward said valve closure element, and b. fluid pressure means to operate said fluid pressure responsive force means and cause movement of said valve closure element into a bubble-tight seal with said valve body regardless of the pressure existent in said fluid product conduit.
Claim 2
Dependent Claim
238 words
In a fluid loading arm including at least one fluid product conduit connected to at least one pipe swivel joint for pivotal movement about the axis through said swivel joint, and a fluid pressure operated valve interconnected with the fluid product conduit in a position to control product flow therethrough, said valve including a valve body and a valve closure element secured to a valve stem for controlling flow through said valve body, the improvement comprising a. a fluid pressure responsive force means for operating said valve closure element, said force means comprising 1. a housing forming a portion of said valve body, 2. a piston rod slidably mounted in a wall of said housing and extending into said valve body towards said valve closure element, said piston rod having a longitudinal bore into which said valve stem slidably extends, 3. spring means surrounding said piston rod and said valve stem, said spring means extending between said valve closure element and said housing, said spring means biasing said element towards a position precluding flow through said valve, and 4. means for tranSmitting fluid pressure to said piston rod to cause said rod to move toward said valve closure element, and b. fluid pressure means to operate said fluid pressure responsive force means and cause movement of said valve closure element into a bubble-tight seal with said valve body regardless of the pressure existent in said fluid product conduit.
Claim 3
Dependent Claim
36 words
a piston rod slidably mounted in a wall of said housing and extending into said valve body towards said valve closure element, said piston rod having a longitudinal bore into which said valve stem slidably extends,
Claim 4
Dependent Claim
36 words
a piston rod slidably mounted in a wall of said housing and extending into said valve body towards said valve closure element, said piston rod having a longitudinal bore into which said valve stem slidably extends,
Claim 5
Dependent Claim
19 words
A fluid loading arm according to claim 1 wherein said fluid pressure responsive force means comprises a cylinder-piston assembly.
Claim 6
Dependent Claim
35 words
a piston rod slidably mounted in a wall of said housing and extending into said valve body towards said valve closure element, said piston rod having a longitudinal bore into which said valve slidably extends,
Claim 7
Dependent Claim
35 words
a piston rod slidably mounted in a wall of said housing and extending into said valve body towards said valve closure element, said piston rod having a longitudinal bore into which said valve slidably extends,
Claim 8
Dependent Claim
37 words
spring means surrounding said piston rod and said valve stem, said spring means extending between said valve closure element and said housing, said spring means biasing said element towards a position precluding flow through said valve, and
Claim 9
Dependent Claim
37 words
spring means surrounding said piston rod and said valve stem, said spring means extending between said valve closure element and said housing, said spring means biasing said element towards a position precluding flow through said valve, and
Claim 10
Dependent Claim
33 words
A fluid loading arm according to claim 2 wherein the cylinder-piston assembly includes a piston having a fluid pressure responsive surface area greater than the corresponding surface area of the valve closure element.
Claim 11
Dependent Claim
37 words
spring means surrounding said piston rod and said valve stem, said spring means extending between said valve closure element and said housing, said spring means biasing said element towards a position precluding flow through said valve, and
Claim 12
Dependent Claim
37 words
spring means surrounding said piston rod and said valve stem, said spring means extending between said valve closure element and said housing, said spring means biasing said element towards a position precluding flow through said valve, and
Claim 13
Dependent Claim
59 words
means for tranSmitting fluid pressure to said piston rod to cause said rod to move toward said valve closure element, and b. fluid pressure means to operate said fluid pressure responsive force means and cause movement of said valve closure element into a bubble-tight seal with said valve body regardless of the pressure existent in said fluid product conduit.
Claim 14
Dependent Claim
59 words
means for tranSmitting fluid pressure to said piston rod to cause said rod to move toward said valve closure element, and b. fluid pressure means to operate said fluid pressure responsive force means and cause movement of said valve closure element into a bubble-tight seal with said valve body regardless of the pressure existent in said fluid product conduit.
Claim 15
Dependent Claim
28 words
A fluid loading arm according to claim 3 wherein the cylinder-piston assembly is operably connected to a fluid pressure source other than that present in the product conduit.
Claim 16
Dependent Claim
36 words
means for transmitting fluid pressure to said piston rod to cause said rod to move toward said valve closure element, said transmitting means having a greater fluid pressure responsive surface area than said valve closure element.
Claim 17
Dependent Claim
36 words
means for transmitting fluid pressure to said piston rod to cause said rod to move toward said valve closure element, said transmitting means having a greater fluid pressure responsive surface area than said valve closure element.
Claim 18
Dependent Claim
20 words
A fluid loading arm according to claim 1 wherein said fluid pressure responsive force means includes a flexible bellows assembly.
Claim 19
Dependent Claim
33 words
A fluid loading arm according to claim 5 wherein said bellows assembly has a greater surface area responsive to fluid pressure than the fluid pressure responsive surface area of said valve closure element.
Claim 20
Dependent Claim
62 words
A fluid pressure operated valve especially for use in a fluid loading arm to control the flow of fluid product therethrough, said valve comprising a. a valve body, b. a valve closure element secured to a valve stem for controlling flow through said valve body, c. a fluid pressure responsive force means for operating said valve closure element, said force means comprising
Claim 21
Dependent Claim
62 words
A fluid pressure operated valve especially for use in a fluid loading arm to control the flow of fluid product therethrough, said valve comprising a. a valve body, b. a valve closure element secured to a valve stem for controlling flow through said valve body, c. a fluid pressure responsive force means for operating said valve closure element, said force means comprising
Claim 22
Dependent Claim
17 words
A valve according to claim 7 wherein said fluid pressure responsive force means comprises a cylinder-piston assembly.
Claim 23
Dependent Claim
18 words
A valve according to claim 7 wherein said fluid pressure responsive force means comprises a flexible bellows assembly.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |