Patent US3552440A successfully refreshed from Google Patents.
US3552440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for controlling flow of concrete
Assignee: HERCULES CONCRETE PUMPS Inc
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Filing: 1969-01-09
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Granted: 1971-01-05
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Expires: 1989-01-09
Abstract
Abstract A cast housing rotatably supports a stainless steel ball valve having three ports formed therein to provide a three-way arrangement. First and second valve seat means extend through openings formed in the housing and engage the outer surface of the ball valve. Sealing means is disposed between each of said valve seat means and the housing to provide a fluid-tight seal. Means is provided for adjusting the position of each of said valve seat means with respect to the housing to compensate for wear of the components.
Inventors
- 👤 Thomas H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:18
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; F04B15/023; F04B7/00; F04B7/02; F04B7/0233; F04B7/0258; Y; Y10; Y10S; Y10S417/00; Y10S417/90; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86863; Y10T137/86871
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
A valve for controlling the flow of concrete, comprising a housing having an inlet opening for communication with a hopper, a second opening at substantially right angular relationship with respect to the inlet opening for communication with a pumping chamber, and a third opening opposite and aligned with the second opening for communication witH an outlet conduit, a ball valve journaled for rotation in said housing and having an outer surface defining portions of a spherical surface: first one piece valve seat means extending within said inlet opening and engageable with the outer surface of said ball valve; first seal means carried by and surrounding said first seat means and in engagement with adjacent portions of the housing; second one piece valve seat means extending within said third opening and engageable with the outer surface of said ball valve; second seal means carried by and surrounding said second valve seat means and in engagement with other adjacent portions of the housing; adjustment means carried by the first valve seat means to adjust same; and adjusting means carried by the second valve seat means to adjust same.
Claim 2
Dependent Claim
186 words
A valve for controlling the flow of concrete, comprising a housing having an inlet opening for communication with a hopper, a second opening at substantially right angular relationship with respect to the inlet opening for communication with a pumping chamber, and a third opening opposite and aligned with the second opening for communication witH an outlet conduit, a ball valve journaled for rotation in said housing and having an outer surface defining portions of a spherical surface: first one piece valve seat means extending within said inlet opening and engageable with the outer surface of said ball valve; first seal means carried by and surrounding said first seat means and in engagement with adjacent portions of the housing; second one piece valve seat means extending within said third opening and engageable with the outer surface of said ball valve; second seal means carried by and surrounding said second valve seat means and in engagement with other adjacent portions of the housing; adjustment means carried by the first valve seat means to adjust same; and adjusting means carried by the second valve seat means to adjust same.
Claim 3
Dependent Claim
17 words
A valve as defined in claim 1, wherein said first and second valve seat means is tubular.
Claim 4
Dependent Claim
21 words
A valve as defined in claim 1 wherein said second opening in said housing is defined by a tapered wall portion.
Claim 5
Dependent Claim
23 words
A valve as defined in claim 1 wherein said tapered wall portion has a cross-sectional configuration defining a portion of a hyperbolic curve.
Claim 6
Dependent Claim
16 words
A valve as defined in claim 1 wherein said ball valve is formed of stainless steel.
Claim 7
Dependent Claim
42 words
A valve as defined in claim 1 wherein said ball valve is of a three-way type having three ports therein and defining a through channel in one position of the ball valve between an associated pumping chamber and an associated outlet conduit.
Claim 8
Dependent Claim
25 words
A valve as defined in claim 1 wherein means for adjusting the position of said first and second valve seat means includes removable shim means.
Claim 9
Dependent Claim
15 words
A valve as defined in claim 1 including cap screws cooperating with said shim means.
Claim 10
Dependent Claim
28 words
A valve as defined in claim 1 wherein each of said valve seat means includes an outwardly directed peripherally extending flange, said cap screws extending through said flange.
Claim 11
Dependent Claim
51 words
A valve as defined in claim 1 wherein said housing includes two cast halves interconnectable with one another, said ball valve being formed of stainless steel and being a three-way type having three ports formed therein, said means for adjusting said first and second valve seat means including removable shim means.
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |