Baths – closets – sinks – and spittoons – Ventilation – Electric-motor pump
Patent
1984-10-29
1985-11-12
Artis, Henry K.
Baths, closets, sinks, and spittoons
Ventilation
Electric-motor pump
4209R, 4211, E03D 902
Patent
active
045518653
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a ventilator for a lavatory pan.
2. Prior Art
Devices for the treatment and/or removal of foul air from a lavatory pan are known, such a device commonly incorporating an extractor fan to withdraw, and exhaust to atmosphere outside the lavatory, air from the discharge pipe leading from the lavatory cistern to the lavatory pan. The installation of such a ventilator has usually involved considerable costly plumbing work, and the completed installation is likely to be obstrusive and unattractive in appearance.
SUMMARY OF THE PRESENT INVENTION
The present invention has been devised with the general object of providing a ventilator for a lavatory pan which is simple and economical to manufacture and to instal, particularly efficient in operation, and neat and unobstrusive in appearance.
With the foregoing and other objects in view, the invention resides broadly in a ventilator for a lavatory pan including a duct for connecting the discharge pipe of a lavatory flushing assembly to the flush pipe of a lavatory pan; an electric extractor fan having an inlet and an outlet to atmosphere; an air passage in the duct connected to the extractor fan inlet; a valve for opening or closing the air passage; initiating means for operating the extractor fan when the valve is in open position; and terminating means operated by flow of water from the discharge pipe and duct for automatically closing the valve and stopping the extractor fan. Preferably the duct is in the form of an elbow with a downwardly extending arm connectible at its top to the discharge pipe and a normally substantially horizontal arm, including a valve chamber, and connectible to the flush pipe, the air passage leading from the valve chamber and the valve being pivotally mounted within the duct. The initiating means preferably includes a switch arm manually movable to its operative position to switch on the extractor fan, and movable by the valve when closing to its inoperative position, switching off the fan.
The terminating means preferably includes a member, which may be of cup-like form, connected to the valve and movable by flow of water through the duct to move the valve to its closed position.
Other features of the invention will become apparent from the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that a preferred embodiment of the invention may be readily understood and carried into practical effect, reference is now made to the accompanying drawings, wherein:
FIG. 1 is a partly broken-away front elevational view of a device according to the invention,
FIG. 2 is a partly broken-away plan view of the device, and
FIGS. 3 and 4 are sectional views to larger scale taken along lines 3--3 and 4--4 respectively in FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The ventilator shown in the drawings includes a mounting frame 10, which may suitably be of a plastics material, moulded integrally with a duct 11 in the form of a elbow having a round-section inlet arm 12 extending downwardly into the rear of a forwardly-extending valve chamber 13. The lower part of the valve chamber is of semi-circular section, its upper part having parallel sides joining perpendicularly a top plate 14 of the mounting frame 10. A round-section duct outlet 15 is secured to the front of the mounting frame to lead coaxially from the valve chamber.
The mounting frame is enclosed within a housing 16 comprising upper and lower parts which may be moulded of a plastics material, the power part of the housing having integral supports 17 for the valve chamber and locking means at 18 for snapping the valve chamber into place relative to the housing.
Within the bend of the elbow duct 11 there is installed a valve fulcrum plate 19, providing a pair of spaced bearings for trunnions 20 extending from a pair of brackets 21 at opposite sides of the middle part of a cranked member 22 comprising a cup arm 23 and a valve arm 24, the two being at an angle of about 135.degree.. At its
REFERENCES:
patent: 1734498 (1929-11-01), Majauskas
patent: 1885715 (1932-11-01), Hanson
patent: 1931052 (1933-10-01), Baither
patent: 2047067 (1936-07-01), Harris
patent: 2126131 (1938-08-01), Orebaugh
patent: 2631298 (1953-03-01), Nofsinger
patent: 2777137 (1957-01-01), McFadden
patent: 4494255 (1985-01-01), Drummond
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