US3766933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling diaphragm vacuum control
Assignee: Broughton Corp
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Filing: 1970-07-27
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Granted: 1973-10-23
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Expires: 1990-07-27
Abstract
Abstract A vacuum control device for controlling the vacuum delivered to certain elements of paper making machines including a housing wherein passages are provided to permit selective control from a vacuum header or atmosphere to a flat box of a paper making machine and wherein a flexible member is provided to control communication through the vacuum and atmospheric introduction passages which member is normally held in closing position to said passages through the utilization of the introduced vacuum, but will upon proper sensing of the element to be controlled, be rolled past certain of the passages to either open or close the same to thereby control the admission of vacuum or atmospheric pressure or pressure above atmospheric pressure.
Inventors
- 👤 C Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:47
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/365; F16K7/00; F16K7/18; Y; Y10; Y10S; Y10S137/00; Y10S137/907; Y10S251/00; Y10S251/901; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/8593; Y10T137/87169; Y10T137/87217; Y10T137/87225
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
217 words
A pressure controller to define a maintained vacuum pressure to a remote location including: a. a housing defining a cavity; b. means permitting connection of said cavity to the remote location; c. means for introducing vacuum pressure to said cavity including a generally arcuately disposed conduit arranged in said cavity having a connection means for the introduction of vacuum pressure thereto and at least one passage through the inner radial wall thereof for the introduction of such vacuum to said cavity; d. means for introducing atmospheric pressure to said cavity including a generally arcuately disposed tubular member having the inner wall generally aligned with the inner wall of said vacuum introduction means to provide therewith a common valving surface with means for introducing atmospheric pressure to the interior of said member and having at least one passage through said wall for the introduction of atmospheric pressure to said cavity; e. shiftable valving means arranged in controlling arrangement to said vacuum and atmospheric pressure introduction means; f. a control chamber having a movable portion having a controlling connection to said valving means and communicating with said cavity; and g. means for introducing control pressure to said control chamber whereby said shiftable valving means will be moved in response to pressure existing in said cavity and said control chamber.
Claim 2
Dependent Claim
217 words
A pressure controller to define a maintained vacuum pressure to a remote location including: a. a housing defining a cavity; b. means permitting connection of said cavity to the remote location; c. means for introducing vacuum pressure to said cavity including a generally arcuately disposed conduit arranged in said cavity having a connection means for the introduction of vacuum pressure thereto and at least one passage through the inner radial wall thereof for the introduction of such vacuum to said cavity; d. means for introducing atmospheric pressure to said cavity including a generally arcuately disposed tubular member having the inner wall generally aligned with the inner wall of said vacuum introduction means to provide therewith a common valving surface with means for introducing atmospheric pressure to the interior of said member and having at least one passage through said wall for the introduction of atmospheric pressure to said cavity; e. shiftable valving means arranged in controlling arrangement to said vacuum and atmospheric pressure introduction means; f. a control chamber having a movable portion having a controlling connection to said valving means and communicating with said cavity; and g. means for introducing control pressure to said control chamber whereby said shiftable valving means will be moved in response to pressure existing in said cavity and said control chamber.
Claim 3
Dependent Claim
19 words
The structure set forth in claim 1 and a plurality of passages through the wall of said tubular member.
Claim 4
Dependent Claim
57 words
The structure set forth in claim 1 and said shiftable valving means including: a. a flexible diaphragm member arranged to seal against the inner walls of said tubular member and said conduit member and being shiftable therealong by said movable portion of said control chamber whereby the vacuum and atmospheric passages therethrough are respectively opened and closed.
Claim 5
Dependent Claim
21 words
The structure set forth in claim 3 and passage means permitting communication of pressure within said cavity agAinst said valving means.
Claim 6
Dependent Claim
83 words
The structure set forth in claim 4 and said valving means including: a. a pair of flexible diaphragm means extending respectively in both directions from a common location intermediate the vacuum and atmospheric pressure introduction passages on the inner wall of said tubular member and conduit member; b. connecting shaft means extending from said movable portion of said control chamber to said diaphragm means; and c. the inner portions of said diaphragm means being attached to said shaft means at spaced locations therealong.
Claim 7
Dependent Claim
20 words
The structure set forth in claim 5 and the movable portion of said control chamber including a resilient diaphragm member.
Claim 8
Dependent Claim
59 words
The structure set forth in claim 5 and said pair of flexible diaphragm means including: a. cup shaped members having the sides thereof arranged and constructed to sealingly engage said inner walls; and b. strengthening means on the spaced bottom portions thereof to prevent collapsing thereof from said walls and to hold the same thereagainst for rolling upon themselves.
Claim 9
Dependent Claim
34 words
The structure set forth in claim 1 and said tubular member extending exteriorally of said housing with said atmospheric pressure introduction means including a passage through the wall portion thereof exteriorally of said housing.
Claim 10
Dependent Claim
29 words
The structure set forth in claim 8 and said control chamber arranged on said tubular member to position said movable portion thereof in operative alignment with said valving means.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |