US2957431A - Pneumatic pump comprising a plunger or raiser tube for oil or grease barrels - Google Patents

Description

Oct. 25, 1960 P. DE GRor-:F 2,957,431

' PNEUMATIC PUMP COMPRISING A PLUNGER OR RAISER TUBE FOR OIL 0R GREASE BAR LS 2 Sheets-Sheet 1 Filed Jan. 17, 195e n 'IZ/111111111 Oct. 25, 1960 P. DE GROEF PNEUMATIC PUMP COMPRISING A RAISER TUBE FOR OIL PLUNGER 0R 0R GREASE BARRELS 2 Sheets-Sheet 2 Filed Jan. 17, 1958 Unite States Patent() PNEUMATIC PUMP COMPRISING A PLUNGER R BAISER TUBE FOR OIL 0R GREASE BARRELS Pierre De Groef, 525 Chaussee de Waterloo, Brussels, Belgium The present invention relates to oil and grease pneumatic pumps used in garages and service stations to tap oil and grease from barrels to be distributed by guns and other distributing apparatus. These pumpshave a discharge tube which is inserted into a barrel through its bunghole, and through which the oil or grease is raised by the pump which conveys it under pressure to the distributng apparatus.

Up to now pumps of this kind were portable pumps including exible hoses for their connection to a compressed air supply and to the distributing apparatus. These flexible hoses are troublesome and their replacement is expensive, particularly for grease hoses which have to withstand very high pressures. The use of movable pumps can be inconvenient inasmuch that the oil or grease remaining on the discharge tube of these pumps once withdrawn from the barrels spoils anything that touches the tube and the grease or oil runs on the ground if the pump is laid down, and in this position dirt from the ground sticks to the plunger of the pump and might cause the pump to become faulty.

The present invention obvates these drawbacks and offers several important advantages.

According to the invention there is provided a xed support in which the discharge tube of the pump is supported and vertically guided in order to be inserted into a full barrel brought under the support and to be lifted or raised to withdraw it from an empty barrel to be replaced.

The pump and tube being so supported, it becomes possible according to the invention to provide for its connection to distributing apparatus and/or compressed air supply rigid pipes which are much simpler and more economical than the usual exible hoses.

In one form of the invention applying particularly to oil pumps the support of the tube comprises the pump body itself, connected t-o the tube by a bush in which the tube is guided so as to slide vertically. A connection between the tube and the pump is provided in the bottom position of the tube through ports in the wall of the latter lopenin-g within the bush.

In another embodiment of the invention, the pump body is mounted on the tube, above the latter, and has detachable connections through which communication is established between the pump and pipes fixed to the support, in the bottom position of the tube, and respectively leading to the distributing apparatus and the compressed air supply. These detachable connections are advantageously of the plug and socket type, locking means being provided to keep them engaged in the bottom position of the tube. The support may advantageously be tubular and form part of one of the pipes.

The support may be rigid, but there is a great advantage iu articulating it so that the portion bearing the tube can be turned in a horizontal plane to facilitate introducing the tube into the barrel if the latter is not With its bunghole right under the tube. In this case the tube may be brought in line with the axis of the bunghole by pivotal movement of the support instead of moving the heavy barrel to bring in line the bunghole and the tube. Two pivoted joints can be provided allowing the tube to sweep the complete upper surface of the barrel to reach the bunghole. With the same aim in mind, the support can be provided with one or more telescopic portions.

It may be of advantage to have a pump witha higher output than the normal portable pumps, the increase in weight and dimensions consequent to the increase of power being not inconvenient as it would be in the case of a portable pump, thanks to the iixed support, particularly when this support comprises the pump body so that only the weight and diameter of the tube are to be considered for handling facility.

The accompanying drawings show by way of example three embodiments of the invention,

Figs. 1 and 2 are side elevati-ons partly broken away of two wall supported pumps, and

Fig. 3 shows a pump with mounted on a column.

Referring to Fig. l, the pump support comprises the pump body 1 attached horizontally to a wall 2 by means `of bolts 3 and having an extension 4 closed at its outer end to form a chamber 5 communicating with the pump 1 through a port 6 and valve 7.

A discharge tube S'extends vertically through the extension 4 and is guided so as to slide vertically in openings 9 provided with sealing means 10. Ports 11 bored laterally in the upper part of the tube A8 provide communication for the latter with the chamber 5 when the tube is lowered in the position shown on the drawing. When the tube 8 is raised by means of the handle 12 to withdraw it from a barrel, the ports 11 no longer coincide with the chamber 5 and the ycommunication between the tube and the pump is broken.

Two pipes 13, 14 connect the pump 1 respectively to a compressed air supply operating it and to the distributing apparatus discharging the grease or oil sucked from the barrel by the pump through the tube and forced under pressure through the pipe 14.

In the second embodiment of the invention shown on Fig. 2, the support is a tubular bracket 15 bolted at 16 to a wall 17 and ending in a bush 18 in which the tube 19 attached to the pump is vertically guided. The pump 20 can be raised with the tube 19 by means of the handles 21 and locked either in the upper or lower position by means of a locking screw 22.

The lower part of the pump 20 is provided with two valve sockets 23, 24 which in the bottom position of the tube 19 i't on two valve plugs 25, 26 mounted on the support 15, and connect the pump to the compressed air supply pipe 27 and to the pipe 28 leading to the distributing apparatus. The tubular support 15 is used as a passage t-o connect the plug 26 to the pipe 28 and forms therefore part of the latter.

In the third embodiment of the invention shown in Fig. 3, a joint 30 is provided between the pump body 31 and the bush 32 in which the tube 33 is supported and vertically guided at the end of the extension 34 which can be turned about the joint 30 to bring the tube 33 in line with the bunghole of the barrel 35. The extension 34 may be telescopic in order to increase the range of the tube 33. With the same aim in mind a second joint may be provided at a convenient point of the support. This second joint, in this example, is provided by a vertical pivot connection 36 connecting the grease or oil pipe 38 to the column 37 supporting the pump. The pump assembly with the tube 33 may pivot on said joint 36, the compressed air being fed to the pump through a pipe coaxial with the pipe 38, or through an articualted support ,part of a building or structure and other modifications pump and support assembly scope ofthe invention.

may be brought to the without departing from the I claim:

1. In a device for evacuating Huid from a portable container having a discharge port, the combination of a pneumatic, rotary, suction pump having an inlet port and an outlet port; a xed elongated horizontal supporting medium having a longitudinally extending passageway therein and on which said pump is carried; a discharge tube so vertically slidable on said supporting medium as to be insertable into the container through said discharge port, and having an inlet end disposed in said container and a discharge end yfor connection to said inlet port of said pump; and a second tube having one end for connection to said outlet port of said pump for discharging the uid from the device, the passageway in the supporting medium forming the connection between one of the ports of the pump to the corresponding end of one of the tubes when the discharge tube is in its lowermost position and within the container, and said other port of the pump being directly connected to the corresponding end of the other tube.

2. In a device for evacuating fluids according to claim 1, in which the discharge end of `the discharge tube comprises an opening in the wall thereof adjacent one of its ends and registrable with the passageway upon movement thereof to insert the inlet end into the container, said passageway extending from the opening to the inlet port of the pump, the second tube being directly connected to the outlet port of the pump.

3. In a device for evacuating uids according to claim 1, in which the pump is directly mounted on the discharge tube and its inlet port is directly connected to the discharge end thereof, the second tube having the one end connected to the outlet port of the pump through the passageway. t

4. In a device for evacuating uid from a portable ycontainer having a discharge port, the combination of a pneumatic, rotary suction pump having an inlet port and an outlet port, an immovable supporting medium on which said pump is carried, a discharge tube so vertically slidable on said supporting medium as to be insertable into the container through said discharge port, and having an inlet end disposed in said container and a discharge end connected to said inlet port of said pump, and a second conduit connected to said outlet port of said pump for discharging the uid from the device, said supporting medium having a tubular bracket in which said discharge tube is slidable, said pump being mounted on the upper end of said discharge tube, said conduit for discharging the fluid being connected to the interior ofsaid bracket, said pump having a valve socket with which said voutlet port of said pump connects, and said bracket vhaving a plug coacting with said socket to connect said outlet port with the interior of said bracket when said discharge tube is in its bottom position.

References Cited in the iile of this patent UNITED STATES PATENTS

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