US3842224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure switch with diaphragm for liquid bearing solids
Assignee: Smith and Loveless Inc
•
Filing: 1973-06-13
•
Granted: 1974-10-15
•
Expires: 1993-06-13
Abstract
Abstract A pressure switch which has no flat surfaces or crevices where solids may settle and accumulate to plug the switch. The switch includes a first vertical connecting nipple in fluid communication at its lower end with the liquid line and at its upper end with a full opening valve means. The valve means is preferably of the ball type having a passageway therethrough defined by vertical side walls. A second vertical connecting nipple is in fluid communication at its lower end with the outlet side of the valve means and at its upper end with a housing. The housing has an opening formed therein defined by vertical side walls. A diaphragm means is positioned within the housing in closing relationship to the opening so as to deflect under varying degrees of the pressure of the liquid within the opening. A switch means is positioned above the housing which is responsive to the deflection of the diaphragm means, the interior diameter of the first and second nipples, the passageway in the ball valve, and the opening in the housing are all in vertical alignment with one another and of substantially the same diameter so as to eliminate flat surfaces where solids may settle and collect. An alternative embodiment is disclosed in which the portion of the housing below the diaphragm has side walls which converge towards the second connecting nipple at an angle greater than 60* .
Inventors
- 👤 F Weis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:54
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
A pressure switch for use in direct contact with a liquid bearing solids line; comprising: a. a substantially vertical connecting pipe having a lower end in fluid communication with said liquid bearing solids line so as to receive liquid under pressure therefrom; b. a control valve means in fluid communication with said connecting pipe for control of liquid flow therethrough, said control valve means having a passageway therethrough defined by substantially vertical side walls; c. a housing positioned above said control valve means having a substantially vertical opening therethrough defined by substantially vertical side walls; d. a diaphragm means, positioned within said housing in closing relationship to said opening, adapted to deflect under varying degrees of pressure of the liquid in said opening; e. switch means positioned above said housing responsive to the deflection of said diaphragm means; and f. said connecting pipe, said passageway and said opening are substantially in vertical alignment with one another and are of substantially the same diameter so as to eliminate flat surfaces where solids may settle.
Claim 2
Dependent Claim
173 words
A pressure switch for use in direct contact with a liquid bearing solids line; comprising: a. a substantially vertical connecting pipe having a lower end in fluid communication with said liquid bearing solids line so as to receive liquid under pressure therefrom; b. a control valve means in fluid communication with said connecting pipe for control of liquid flow therethrough, said control valve means having a passageway therethrough defined by substantially vertical side walls; c. a housing positioned above said control valve means having a substantially vertical opening therethrough defined by substantially vertical side walls; d. a diaphragm means, positioned within said housing in closing relationship to said opening, adapted to deflect under varying degrees of pressure of the liquid in said opening; e. switch means positioned above said housing responsive to the deflection of said diaphragm means; and f. said connecting pipe, said passageway and said opening are substantially in vertical alignment with one another and are of substantially the same diameter so as to eliminate flat surfaces where solids may settle.
Claim 3
Dependent Claim
25 words
The invention as defined in claim 1 wherein said side walls of said opening converge towards said connecting pipe at an angle greater than 60*.
Claim 4
Dependent Claim
208 words
A non-clogging pressure switch for direct attachment to raw sewage line, comprising: a. a first substantially vertical connecting nipple having a lower end in fluid communication with said raw sewage line so as to receive liquid under pressure therefrom; b. a full opening valve means having an inlet side in fluid communication with an upper end of said first connecting nipple for control of liquid flow therethrough, said valve means having a passageway therethrough defined by substantially vertical side walls; c. a second substantially vertical connecting nipple having a lower end in fluid communication with the outlet side of said valve means; d. a housing secured to the upper end of said second connecting nipple having a substantially vertical opening therethrough defined by substantially vertical side walls; e. a diaphragm means, positioned within said housing in closing relationship to said opening, adapted to deflect under varying degrees of pressure of the liquid in said opening; f. switch means positioned above said housing responsive to the deflection of said diaphragm means; and g. said first and second connecting nipples, said passageway and said opening are substantially in vertical alignment with one another and are of substantially the same diameter so as to eliminate flat surfaces where solids may settle.
Claim 5
Dependent Claim
208 words
A non-clogging pressure switch for direct attachment to raw sewage line, comprising: a. a first substantially vertical connecting nipple having a lower end in fluid communication with said raw sewage line so as to receive liquid under pressure therefrom; b. a full opening valve means having an inlet side in fluid communication with an upper end of said first connecting nipple for control of liquid flow therethrough, said valve means having a passageway therethrough defined by substantially vertical side walls; c. a second substantially vertical connecting nipple having a lower end in fluid communication with the outlet side of said valve means; d. a housing secured to the upper end of said second connecting nipple having a substantially vertical opening therethrough defined by substantially vertical side walls; e. a diaphragm means, positioned within said housing in closing relationship to said opening, adapted to deflect under varying degrees of pressure of the liquid in said opening; f. switch means positioned above said housing responsive to the deflection of said diaphragm means; and g. said first and second connecting nipples, said passageway and said opening are substantially in vertical alignment with one another and are of substantially the same diameter so as to eliminate flat surfaces where solids may settle.
Claim 6
Dependent Claim
21 words
The invention as defined in claim 3 wherein said Valve means includes a ball valve member with said passageway passing therethrough.
Claim 7
Dependent Claim
66 words
The invention as defined in claim 3 wherein said housing includes a lower section, secured to the upper end of said second connecting nipple, having a portion of said opening defined therein and an upper section, secured to said switch means, having a portion of said opening defined therein to receive a switch activating means, said diaphragm means being sandwiched between said lower and upper sections.
Claim 8
Dependent Claim
34 words
The invention as defined in claim 5 wherein said portion of said opening defined in said lower section has side walls which converge towards said second connecting nipple at an angle greater than 60*.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |