Patent US4380250A successfully refreshed from Google Patents.
US4380250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Choke unit
Assignee: Individual
•
Filing: 1981-03-24
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Granted: 1983-04-19
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Expires: 2001-03-24
Abstract
Abstract In an adjustable choke a restricted choke fluidway takes the form of a groove in the axial face of a plate sealingly resting against a fixed plate, the groove having a cross-section changing along its length. Fluid is let into one end of the groove through the grooved plate and out through a port in the face of the fixed plate. By turning the grooved plate, the length of groove between the two ports is changed so that the choking effect is changed.
Inventors
- 👤 Kurt Stoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:33
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/34; F16K47/00; F16K47/04; F16K47/045; F16K5/00; F16K5/08; F16K5/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8593; Y10T137/87265; Y10T137/87523; Y10T137/87539; Y10T137/87547; Y10T137/87555; Y10T137/87917; Y10T137/88054
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
207 words
In a choke apparatus for gases having a housing, an inlet duct in said housing and an adjustment system for changing the choking effect, said system communicating with an outlet opening, the improvement comprising wherein said adjustment system includes: (a) a rotatable adjustment plate, a shaft able to be turned from without said housing and having said plate keyed thereon, (b) means defining an outlet duct in communication with said outlet opening, one side of said adjustment plate facing said outlet duct and having formed therein a groove extending less than 360° around the axis of rotation of said plate, said groove having a cross-section which changes in area along its length, and (c) a fixed cover plate covering said side of said adjustment plate with said groove, said cover plate having an outlet hole which is aligned with said groove and communicates with said outlet duct, said plate with said groove being able to be rotated from a starting position with the lowest choking effect to a position with the largest choking effect, the end of said groove with the largest cross-section communicating with an inlet opening in said adjustment plate which by way of an inlet space in said housing communicates with said inlet duct.
Claim 2
Dependent Claim
207 words
In a choke apparatus for gases having a housing, an inlet duct in said housing and an adjustment system for changing the choking effect, said system communicating with an outlet opening, the improvement comprising wherein said adjustment system includes: (a) a rotatable adjustment plate, a shaft able to be turned from without said housing and having said plate keyed thereon, (b) means defining an outlet duct in communication with said outlet opening, one side of said adjustment plate facing said outlet duct and having formed therein a groove extending less than 360° around the axis of rotation of said plate, said groove having a cross-section which changes in area along its length, and (c) a fixed cover plate covering said side of said adjustment plate with said groove, said cover plate having an outlet hole which is aligned with said groove and communicates with said outlet duct, said plate with said groove being able to be rotated from a starting position with the lowest choking effect to a position with the largest choking effect, the end of said groove with the largest cross-section communicating with an inlet opening in said adjustment plate which by way of an inlet space in said housing communicates with said inlet duct.
Claim 3
Dependent Claim
73 words
The choke apparatus as claimed in claim 1, wherein said groove has in cross-section the shape of a triangle, the depth of said groove into said adjustment plate and the breadth of said groove as measured at said one side of said plate each decreasing continuously from a highest value in the region of said inlet opening in said adjustment plate to a lowest value at a location remote from said inlet opening.
Claim 4
Dependent Claim
33 words
The choke apparatus as claimed in claim 2, wherein the depth of said groove at a location therein aligned with said outlet hole is proportional to the angular position of said adjustment plate.
Claim 5
Dependent Claim
47 words
The choke apparatus as claimed in claim 2, wherein on the side of said adjustment plate opposite said one side there is a facer plate fixedly joined to said adjustment plate and having an inlet hole therethrough which communicates with said inlet opening in said adjustment plate.
Claim 6
Dependent Claim
33 words
The choke apparatus as claimed in claim 1, including a check valve provided in said inlet duct, said check valve inhibiting gas flow from the inside of said housing into said inlet duct.
Claim 7
Dependent Claim
41 words
The choke apparatus as claimed in claim 1, wherein between said inlet duct and said outlet duct there is a bypass with a check valve therein which inhibits gas flow through said bypass from said inlet duct to said outlet duct.
Claim 8
Dependent Claim
27 words
The choke apparatus as claimed in claim 1, wherein said housing is made in two pieces and is sealed by a gasket provided on said cover plate.
Claim 9
Dependent Claim
65 words
The choke apparatus as claimed in claim 4, wherein said shaft, said adjustment plate and said facer plate are rotatably supported in a front part of said housing and wherein between and engaging said facer plate and a back wall of said housing is a spring which extends through said inlet space and urges said facer plate and said adjustment plate toward said cover plate.
Claim 10
Dependent Claim
36 words
The choke apparatus as claimed in claim 1, including a thumbwheel provided on said shaft at a front side of said housing and a scale which indicates the position of said thumbwheel relative to said housing.
Claim 11
Dependent Claim
37 words
The choke apparatus as claimed in claim 1, wherein a stopper member is fixed on said shaft and is cooperable with a stop pin fixed to said housing to limit relative rotation of said shaft and housing.
Claim 12
Dependent Claim
22 words
The choke apparatus as claimed in claim 4, wherein between said facer plate and said adjustment plate there is a sealing gasket.
Claim 13
Dependent Claim
15 words
A choke apparatus as claimed in claim 1, wherein said groove is spiral in form.
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) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |