Patent US3574618A successfully refreshed from Google Patents.
Patent US3633797A successfully refreshed from Google Patents.
US3633797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary valves
Assignee: Longview Fibre Co
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Filing: 1970-06-24
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Granted: 1972-01-11
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Expires: 1990-06-24
Abstract
Abstract A material-handling valve particularly advantageous for use in processing fibrous materials, including a valve rotor having circumferentially spaced pockets defined by radially projected vanes, the trailing surfaces of which incorporate means defining radially oriented passages opening directly at the base of the related pocket. Means are provided to align with and direct steam to move inwardly of and through said passages to impact on the base of each rotor pocket, first as it approaches the valve outlet, thereby to load the pocket contents from the rear and to facilitate its discharge on exposure to the valve outlet, and to secondly scour said passages and the walls of each pocket on a full registration thereof with said outlet.
Inventors
- 👤 Russell M Graff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
D; D21; D21C; D21C7/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
A rotary valve comprising a rotor the periphery of which includes at least one pocket, a housing for said rotor including Means defining an inlet thereto for introducing a charge of material to said pocket on alignment therewith and an outlet therefrom for discharge of the charge on exposure of said one pocket to said outlet and means including at least one passage for introducing fluid directly to the base of said pocket, to the rear of the charge therein, to preload the charge from its rear prior to the exposure thereof to said outlet whereby to produce a forceful ejection of said charge in an automatic response to its exposure to said outlet.
Claim 2
Dependent Claim
114 words
A rotary valve comprising a rotor the periphery of which includes at least one pocket, a housing for said rotor including Means defining an inlet thereto for introducing a charge of material to said pocket on alignment therewith and an outlet therefrom for discharge of the charge on exposure of said one pocket to said outlet and means including at least one passage for introducing fluid directly to the base of said pocket, to the rear of the charge therein, to preload the charge from its rear prior to the exposure thereof to said outlet whereby to produce a forceful ejection of said charge in an automatic response to its exposure to said outlet.
Claim 3
Dependent Claim
78 words
A rotary valve as set forth in claim 1 characterized by said means for preloading the charge including a plurality of passages arranged to provide for direct radial impact of jets of fluid on the base of said one pocket to encounter said charge in an area to the rear thereof whereby to lift the charge from said base and store energy to its rear to provide said forceful ejection of the charge on exposure to said outlet.
Claim 4
Dependent Claim
57 words
A rotary valve as set forth in claim 1 characterized by said rotor incorporating, in the walls defining each said pocket, radial passages which open at their inner ends immediately adjacent the base of said pocket for radial jets of fluid to impact thereon to provide thereby said means for preloading the charge in said one pocket.
Claim 5
Dependent Claim
41 words
A rotary valve as in claim 3 characterized by means in connection with said rotor housing at said outlet adapted to align with said passages and direct therethrough fluid jets to scour said passages and the walls of the associated pocket.
Claim 6
Dependent Claim
58 words
A rotary valve as in claim 1 characterized by duct means associated with the leading surface of each said pocket and opening to the base of said pocket, said duct means providing a flow path for directing fluid to spread over the base of said pocket to produce a pressure load on the charge therein from its rear.
Claim 7
Dependent Claim
79 words
A rotary valve as in claim 5 characterized by means in said outlet in the form of jet-defining passages adapted to align with said duct means, as the related pocket registers with said outlet, for directing scouring jets of fluid through said duct means and from said duct means to produce a scouring of the pocket base and the walls to clear the same in the event any difficult clinging materials should remain on discharge of the pocket contents.
Claim 8
Dependent Claim
79 words
A rotary valve as in claim 1 characterized by said means for preloading including duct means located in connection with one surface of said pocket and there being means in connection with said housing for delivery of fluid to said duct means under pressure as said pocket approaches said outlet to provide the preloading of the charge to its rear and to continue the delivery of said fluid to said pocket as it is initially exposed to said outlet.
Claim 9
Dependent Claim
34 words
A rotary valve as in claim 7 characterized by said duct means having a radial orientation and extending from the outer periphery of said rotor to a point adjacent the base of said pocket.
Claim 10
Dependent Claim
47 words
A rotary valve as in claim 8 characterized by means in said outlet for directing through said duct means fluid under pressure to scour said duct means on registration therewith and simultaneously produce a scouring of the pocket walls on registration of the pocket with said outlet.
Claim 11
Dependent Claim
29 words
A rotary valve as in claim 8 characterized by said duct means including a plurality thereof having a parallel relation and being spaced intermediate the ends of said pocket.
Claim 12
Dependent Claim
25 words
A rotary valve as in claim 7 characterized by said duct means having a radial orientation and being centered intermediate the ends of said pockets.
Claim 13
Dependent Claim
89 words
A rotary valve unit as in claim 1 characterized by said rotor having a plurality of circumferentially spaced pockets defined at its periphery by radially projected vanes, each said vane having on the trailing surface thereof means defining conduits leading from the periphery of said vane to the base of the related pocket, said conduits serving for directing fluid to the base of said pockets immediately preceding the valve outlet so as to conditiOn the contained charge for forceful ejection through said outlet by storing energy to its rear.
Claim 14
Dependent Claim
48 words
A rotary valve as in claim 12 characterized by said conduit means being formed by pipelike sections connected integral with the trailing surface of each vane, said conduit means having an inlet opening at the periphery of said rotor and a discharge opening immediately adjacent a pocket base.
Claim 15
Dependent Claim
40 words
A rotary valve as in claim 13 characterized by the discharge end of said conduit means having a bevel to open the discharge end to define a discharge opening which is greater than the inlet opening to said conduit means.
Claim 16
Dependent Claim
55 words
A rotary valve as in claim 1 characterized by further means including a portion of said first-mentioned preloading means operative on registration of said one pocket with said outlet to produce a cleansing flow of fluid immediately at the base of said pocket whereby to forcefully scour said pocket in the course of its discharge.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |