Dispensing – With casing or support – Enclosing cover for actuating parts of discharging means
Reexamination Certificate
2000-05-10
2001-09-04
Shaver, Kevin P. (Department: 3754)
Dispensing
With casing or support
Enclosing cover for actuating parts of discharging means
C222S189100, C222S402000
Reexamination Certificate
active
06283335
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention concerns sprayers and more particularly sprayers adapted for kitchen use in which olive oil can be sprayed from a receptacle by air compressed in the receptacle by a hand pump mounted to the top of the receptacle.
Devices to spray a liquid from a receptacle by the use of air pressure developed by a built in hand pump have previously been devised. See U.S. Pat. No. 4,077,442, issued on Mar. 7, 1978 for an “Arrangement in Liquid Sprayer Containers”.
That design uses a cap which is stroked to force air into the receptacle back through a spray nozzle, the air pressure developed opening a check valve to allow air to be forced into the receptacle, which is then retained in the receptacle by closing of the spray nozzle check valve. After the cap is removed, finger depression of the spray nozzle causes the check valve to be opened, and the retained air pressure forces the liquid to be sprayed out through the spray nozzle.
This arrangement is effective, but requires the cap to be removed in order to spray the liquid.
It is the object of the present invention to provide an air pressure liquid sprayer using a built in hand pump operated with a receptacle cover which does not require removal of the cap to spray a liquid from a spray nozzle at the top of the receptacle.
SUMMARY OF THE INVENTION
These and other objects of the present invention which will be understood upon a reading of the following specification and claims are achieved by a receptacle cap screwed onto the receptacle and formed with a central pumping tube extending from the top of the cap downwardly into the receptacle interior.
A hollow cover is slidably received over the cap and onto an interfit neck portion of the receptacle. The cover is formed with a pumping piston slidable into the pumping tube and having a first check valve mounted at its lower end in an adapter piece attached to the piston lower end.
A second check valve is mounted to the lower end of the pumping tube which has an opening therein to receive compressed air as the cover and piston are stroked, allowing compressed air to be forced into the receptacle and retained by the second check valve. The first check valve allows a fresh charge of air to pass beneath a piston seal as the cover pulled up.
A separate opening to one side of the pumping tube is provided in the cap, receiving a spray nozzle and valve plunger, with a draw tube extending to the bottom of the receptacle allowing oil to be forced out of the nozzle by air pressure in the receptacle when the valve plunger is depressed.
The spray nozzle is exposed by rotation of the cover from a cover pumping position to bring an opening in the cover into registry with the spray nozzle, allowing a user the finger access needed to depress the spray nozzle valve plunger.
The cover has an inner protrusion located to catch on a raised ridge on the receptacle neck in a spraying and stored position to prevent cover removal, but allowing passing through a gap in the ridge when the cover is rotated to a pumping position. An upper ridge on the receptacle neck catches the protrusion when the cover is stroked upwardly, providing an upper limit to the stroke motion to prevent escape of the cover when pumping.
Ribs may be formed on the inside of the cover to guide the cover on the receptacle neck when it is being stroked to prevent tipping of the cover as it is stroked
The spray nozzle valve is enclosed when the cover is rotated to either the stored or pumping positions.
The pump cap can be removed and replaced with a pouring spout cap to allow use as a melted butter pourer.
REFERENCES:
patent: 3460719 (1969-08-01), O'Donnell et al.
patent: 3955720 (1976-05-01), Malone
patent: 4264037 (1981-04-01), Nozawa
patent: 5267674 (1993-12-01), von Schuckmann
patent: 5649645 (1997-07-01), Demarest et al.
Schapers Jochen
Young Michael W. K.
Young Wei
Benefiel John R.
Progressive International Corp.
Shaver Kevin P.
Willatt Stephanie L.
LandOfFree
Oil sprayer with hand operated air pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oil sprayer with hand operated air pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil sprayer with hand operated air pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2532313