US795635A - Hand paint-spraying device. - Google Patents

Description

No. 795,635. PATENTED JULY 25, 1905.

H. MIKOREY.

HAND PAINT SPRAYING DEVICE.

APPLICATION FILED DEG-17, 1904.

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PATENTED JULY 25, 1905. H. MIKOREY.

HAND PAINT SPRAYING DEVICE.- APPLICATION 11,121) DBO. n, 1904.

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.UNITED STATES PATENT OFFICE.

HANS MIKOREY, OF SCHONEBERG, NEAR BERLIN, GERMANY, ASSIGNOR TO THE FIRM OF W. GRAAFF & COMPANY, GESELLSOHAFT MIT BESCHRANKTER HAFTUNG, OF BERLIN, GERMANY.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed December 17, 1904. Serial No. 237,222.

painting walls and floors and for decorative purposes generally.

The apparatus belongs to that known type of paint-sprayers in which-the aint passes out of a paint-reservoir to a nozz e and when flowing out of the latter is sprayed by the aircurrent of a compressed-alr pipe, which air passes out of a second nozzle surrounding the first one.

As compared with the known apparatus of this type the novelty of the present invention consists in the special construction of the paint-reservoir in so far as its wall on the outflow side is so inclined that it also permits the supply of the very last remaining portion of paint to the nozzle.

Another object of the invention is to provide means whereby compressed air can be supplied to the paint-reservoir for forcibly.

expelling the paint. This feature is specially adapted for paints of a viscous liquid nature, because in this case the flow of the paint does not take place with the desired certainty.

\ Finally, the invention comprises controlling mechanism which enables the operator to start the supply of compressed air to the nozzle at the same time when the air-inlet to the reservoir is opened.

The inventlon is illustrated in the accompanying drawings.

Figure 1 represents the construction with a vertical paint-reservoir and with a supply of compressed air thereto.' Fig. 2 represents the construction with a diiferently-arranged paint-reservoir for spraying the paint downward, and Fig. 3 is an end elevation of the construction according to Fig. 2.

p The apparatus shown in Fig. 1 comprises the three features of the invention. ervoir a of any suitable cross-sectional form is supported in a bracket 6, connected with a handle 1', which also serves as a casing for a controlling-valve tube or cylinder t. The

bottom of the reservoir a is formed by an in- The res-- clined wall a, and has attached to its lower most end the paint-outflow tube 0, which is controlled by a suitable cock is, and has its horizontal part terminating in the nozzle 6, where the supply of the compressed air takes place. The compressed air is supplied through a valve-controlled pipe (I, communicating with an air-vessel u, from which passages lead to the annular chamber w of the nozzle 6. A branch or auxiliary pipe 9 is branched from the air-supply pipe (1 and passes through the delivering part of the pipe 0, terminating at the nozzle exit thereof. By the combined action of the air-currents issuing from the annular chamber to and the inner tube 9 the paint is sprayed out of the nozzle in a finely-divided state. The reservoir is supplied with paint through a closable filling-opening it. If the reservoir were hermetically closed after it is filled, it is obvious that no paint could be delivered at the outlettube 0. vided on the upper part of the reservoir, and this pipe Z passes from a port at the wall of the controlling-valve tube 25, which port is controlled by the annular grooved slidevalve piston p. The latter is connected by a rod f to a similar slide-valve g, which is arranged for controlling the supply of the compressed air to the pipe d. .The combined slide-valves p and g are under the action of a spring y, tending to adjust the slide-valves in the cut-off position, as shown in Fig. 1. The operator holding the handle in his hand can depress with the thumb the push-button 6, connected with the said slide-valve device. This arrangement enables the operator when opening the compressedair supply to simul taneously open the air-inlet pipe Z, a suitable opening 2 being provided for this purpose in the valve-controlling tube 15 as an inlet for the atmospheric air. By cutting 01f the air when the apparatus is not in use the paint is thus prevented from being deteriorated. Provided that paintof a higher degree of viscosity is to be employed in the paint-reservoir, it is advantageous to apply pressureto' the paint contained in the reservoir. For this purpose a pipe m extends from the air vessel u to the upper part of the reservoir. By opening a cock n in this pipe m compressed air is admitted over the paint and the latter is forcibly expelled from the reser- An air-supply pipe Z is therefore provoir, assisting the delivery through the nozzle b. The inclined wall a of the paint-reservoir a performs the function of collecting and discharging the paint to the deliverypipe 0 and permits the very last remaining portion of paint to be utilized no matter in what operative position the apparatus is held. The apparatus, according to Fig. 1,.

is chiefly adapted for spraying in a horizontal or downward direction.

The modified construction, according to Figs. 2 and 3, is chiefly destined for spraying downward'for instance, for painting floors. It comprises the paint-reservoir a, which in this case is arranged horizontally and has the removable lid h; further, the compressed-airsupply pipe (1, the paint-delivery pipe 0, terminating in the nozzle 1), the air vessel u, which communicates with the annular nozzle-chamber w, and, finally, the handle 7". The latter is shaped in the form of a yoke, and the operator when holding the apparatus by means of this handle can at the same time depress the push-button c with his thumb. The said push-button e controls the opening or closing of a flexible tube'o, forming an intermediate part of the compressed-air-supply pipe (1. A spring 3 tends to keep the push-button in that position in which the supply is cut off. It is obvious that this arrangement enables a similar operation to that according to Fig. l. The paint-reservoir has the inclined wall at its front end? 'i. e., at that end where the outflow-pi e c communicates-and this wall extends om the bottom obliquely toward the said outflow, as shown in Fig. 2. By this arrangement the supply of the paint to the nozzle is effected as soon as the apparatus is tilted downwardly, the paint then flowing along the inclined wall which delivers all the paint to the nozzle. The cutting-off device referred to in connection with the push-button e can be constructed with a throttle-valve or the like, so that by operating the pushbutton the supply can be regulated at will.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim, and wish to secure by Letters Patent, is

1. A hand paint-spraying device consisting of a closed paint-reservoir, a nozzle leading therefrom, a pipe for supplying compressed air to said nozzle, a pipe for supplying air at atmospheric pressure to the reservoir above the paint therein and a device for simultaneously controlling the supply of atmospheric air to the reservoir and compressed air to the nozzle, substantially as described.

2. A hand paint-spraying device consisting of a closed paint-reservoir, a nozzle leading therefrom, means for supplying said nozzle with compressed air, a connection from said means to the top of the reservoir for delivering compressed air to the reservoir above the paint, a pipe for supplying atmospheric air to the reservoir above the paint and means for simultaneously controlling the supply of compressed air to the nozzle and of atmospheric air to the reservoir, substantially as described.

3. In a hand paint-spraying device 0 erated by a compressed-air spraying-nozz e, a horizontally-arranged paint-reservoir having an inclined wall extending to the delivery-outlet and so arranged that by tilting the apparatus, the supply of paint can be regulated, substantially as described and shown in the drawings.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HANS MIKOREY.

Witnesses HENRY HAsPER, WOLDEMAR HAUPT.

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