US2588943A - Farm sprayer - Google Patents

Description

March ll, 1952 Filed OCT.. 25, 1946 c. TAVERNON 2,588,943

FARM SPRAYER 2 SHEETS--SHEET l Patented Mar. 1l, 1952 Claude Tavernon,

Villefranche-sur-Saone, France Application October 23, 1946, Serial'No. 705,169 In France April 158, 1945 6 Claims. 1

My invention relates to farmsprayers adapted to spray corrosive liquids. In some. known sprayers, the hood is screwed in the body and is therefore theoretically easily detachable, .but in practice oxidation of the connecting screws takes place rapidly and it becomes impossible to` remove the hood.

An object of my invention is to provide a farm sprayer all the parts of which will be easily detachable for cleaning and repair, even after a long use, though it comprises the same parts as the known farm sprayers and operates likewise.

Anotherobject is to provide a farm sprayer all thefparts of which are made ofcorrosion resisting material or are well protected against corrosion.

Still a further object is to provide for a thorough and reliable fluidtightness of the sprayer and hence to provide for such iluidtightness by keeping the number of joints and packing members as low as possible.

A further object of my invention is to attain the aforesaid objects with a sprayer comprising only few parts.

With these and other objects in View my invention resides in a novel design, arrangement and change of material of the usua1 parts of a farm sprayer.

By way of non limitative examples, the attached drawing shows two embodiments of the sprayer which forms the subject-matter of the invention.

In the drawing:

Fig. 1 is a vertical section through the apparatus axis of a rst embodiment.

Fig. 2 is a partial horizontal cross section following the line II-II of Fig. 1.

Fig. 3 is a half bottom end view of the apparatus, with the pump removed.

Fig. 4 is a vertical section through line IV-IV of Fig. 3, and

Fig. 5 a bottom end view of the apparatus with the pump in place, in a second embodiment.

The two embodiments illustrated rare only different from one another by the shape of the sprayer body cross section which is circular in one case and bean shaped in the other. In both cases the apparatus comprises a hollow body I moulded solid with its bottom 2 in a synthetic resin such as Bakelite, phenoplast, or yany other material capable of resistance to impacts and to the corrosive action of spray fluids. The body wall made as thin as possible is strengthened from place to place by webs or strips 3 cast solid on the Wall inner face and running along the whole length of such wall. The body I is closed at the upper end by a cover 4 `iitted in the body and secured to 2 it'byv screws 5 engaged in blind holes providedin the strip 3 upper ends. Thus such screws have no contact with the fluid inside the body.

A large diameter central opening 6 is providedk in the cover II and is closed by a taper plug I also made of a plastic material.

Inside the body I a hood 8 is arranged, made of a plastic material and secured to the bottom 2. The outside face of bottom 2 is provided with a circular wall 9 to which a pump I0 is se-cured. This wall Ilr denes a central recess IlI and is formed with other recesses I2 in its circular rim. The pump I0 and the hood 8 are secured by the same screws I3 which are extending Vthrough the holes I4 provided along the circular Walls 9 and are screwed into blind holes provided in the bosses I6 which are integral with the lower end of the hood wall. The screws I3 are protected by the circular wall 9 and the bosses I6 from the corrosive action of the spray fluid.

The pump membrane I5 is fluid-tightedly clamped between the rim of the wall 9 and the pump body I0. Hole II extends through the wall 9 connecting the interior of the hood with the outside. A spray hose may be attached to the outer end of hole I'I. An inlet Valve, not shown, connects the interior of hood and the body I. An outlet valve, not shown, is provided in hole I'I.

Liquid to be sprayed is lled into the space between the body I and the hood 8. When operated the pump draws liquid from that space and forces it out of hole I1. The air contained in the hood serves as an air cushion assuring an equal ow of the sprayed liquid.

Of course the invention is not limited in any way to the details shown or described, which are only given as examples.

What I claim is:

1. In a farm sprayer including a hollow body including a side wall and a bottom, and adapted to contain the liquid to be sprayed, a hoodl located within said body and removably secured to the bottom thereof, and pumping means externally secured to said bottom, said body and its bottom forming a one-piece moulded unit made of plastic. open at its end remote from said bottom over substantially the whole cross-section of the body, said hood being made of plastic and wholly contained within said body, securing means extending from the exterior through said bottom and engaging hood parts inside the body to removably and fluid tightly apply and clamp said hood onto the inner face of said bottom, and a cover also made of plastic removably secured to said open end to close the latter and allow said Vblind hole in register with a hole through said bottom, said securing means consisting in screws extending from the exterior through said bottom holes into said screw-threaded blind holes.

3. In a farm sprayer as in claim 1, said bottom being moulded with a closed wall projecting on its underside and enclosing a centralrrecess, said pumping means being applied against the lower I face of said wall and secured thereto so that said recess forms the pumping chamber proper.

4. In a farm sprayer as in claim 1 said ,re-1 i movable cover being provided with a central hole large enough to give passage to said hood and a plug for closing said hole.

5; In a farm sprayer including a hollowbody` including a side wall and a bottom, and adapted to contain the liquid to be sprayed, a hood located within said body and removably secured to the bottom thereof, and pumping means externally secured to said bottom, said body and its bottom forming a one piece moulded unit made of plastic, open at its end remote from said bottom over substantially the Whole-cross-section of the body, said bottom being moulded with a closed wall projecting on its underside and enclosing a central recess, said hood being made of plastic and resting upon the inner face of said bottom with its Wall in register with said closed Wall on the other face of the bottom, said pumping means including a pumping membrane extended over said recess and having its edge applied on the end of thewall bounding said recess, and screws extended from the exterior through said membrane, closed wall, bottom, and screwed into the hood wall thereby to removably and iiuidtightly clamp said hood onto the inner face of said bottom and said pumping membrane against the end of said closed'wall. Y

6. In a farm sprayer as in claim 5, vsaid pumping membrane being made of a flexible material adapted to provide a fiuidtight joint between two surfaces when pressed therebetween.

CLAUDE TAVERNON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 487,397 Stone et al. Dec. 6,1892 680,722 Mauran Aug. 20, 1901 750,560 Allen Jan. 26, 1904 1,347,769 Wilkinson July 27, 1920 1,975,583 'Latham Oct. 2, 1934 2,296,814 Ebert Sept. 22, 1942 Y 2,354,265 Horvath July 25, 1944 2,393,568 Root Jan. 22, 1946 2,396,932 Slaton et a1 Mar. 19, 1946 FOREIGN PATENTS Number Country Date 270,928 Great Britain May 19, 1927 421,221 France Dec. 15, 1910 461,729 France Nov. 5, 1913

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