US1568170A - Pump - Google Patents

Description

PUMP

Filed Oct. 17, 1924 L. LE BRET Illl...

Jnvenor Jan) 5 Mnesses:

PATENT CFFICE.

'LUDWIG LF. BRET, OF CHARLOTTENBURG, GERMANY.

PUMP.

Application. filed October 17, 1924. Serial No. 744,247.

To all whom t may concern.'

Be it vknown that I, LUDWIG LE BREW, a German citizen, and residing at Charlottenburg', Germany, have invented certain new and useful Improvements in a Pump (for which I have made application for patent 1n Germany on 9th November, 1923, Patent No. 399.511), of ywhich the following is a specification. .'i y n This invention relates to an improved i pump for a supply of different liquid quantities to a plurality of consumption places by means of one plunger only, comprising a rotary plunger- -drum and a cam driving mechanism for the reciprocating motion of the latter consisting of a disclike extension on said drum'having camsthereon of a corresponding number to that of the consumptionplaces and of which one forms a pressure `and suction cam and the others pressure cams only and of an endless cain groove consisting of a number of cam portions corresponding to that of the consumption places and bounded by a suction cam race formed of separately adjustable cam pieces and by an adjustable integral pressure cam race, all said cams being in contact with said pressure cam race while the pressure and suction cam only is also in con tact with said suction cam race.

The advantages are: best positive guiding of the plunger drum, large contact surfaces between cams and cam races, cific want of surface for the guiding planes, and a resultant acting oli-the middle of the plunger drum as a principal power.

The accompanying drawing illustrates in Fig. 1 -in a central longitudinal section a preferred form of construction of the iniproved arrangement for four places of consumption, while Fig. 2 shows the endless cam groove in its development, with different positions of the integral pressure cam race and ofthe suction cani race pieces. Fig. 3 shows part of Fig. 1 only, and Fig. 4 is a` similar view toFig. 1 illustrating a modification of the arrangement.

In a cylinder 1 the plunger drum 4 is rotatably mounted and adapted to be set in rotation by, means of a worm gearingQ, 3.- In acentral boring 5 of said drum astationary lplun er 6 is fitted'.l The plunger drum has a isclike extension 7 on which, corresponding to the number of consump- -tion places, four cams are provided, of

which three form pressure cams 8 and onesmallest spea pressure and suction cam 9. Said cams 8 and 9 run in an endless cam groove bounded by a suction cam race formed of adjustable cam pieces 10 and by an integral pressure cam race 12 and impart thereby to the plunger drum 4 its reciprocating motion. All the cams 8 and 9, while acting in coinmon and simultaneously, impart to the plungerdrum its pressure stroke; 4hence result extremely favourable working conditions during the pressure periods. The suction stroke is effected by the cam 9 only,'the

Asame alone being so dimensioned that it can slide along the adjustable suction cam race. The formation of the suction cam 9 and of the cani race pieces 10 of the suction cam race offer absolute guarantee for a reliable suction work. The cam groove consists, as shown in Fig. 2, of as many pressure and suction* cam portions as there are consumption places. The change of the determination of the quantity of supply to the single consumpt-ion places separately or to all of them commonly is effected y non-moved constructional members and can thus take place during the working of the'i pump.

'For this purpose, each cam piece 10 of the suction cam race can be adjusted with reference to said pressure cam race by having each a separate regulating screw 11 attached thereto (Figs. 1/3), separately and inde-` pendently of the othercam pieces y10, the stroke of the plunger drum 4-and thus the determination of the quantity of supply to the corresponding consumption place-beng thereby controlled from zero to a maximum. The integral pressure cani race 12 can be adjusted with reference to the suction cam race (see different positions of same in the left hand and right hand half of Fig. 2), for instance by means of a screw-spindle 14 in the cover 13 of the cylinder 1, for the purpose of allowing, if desired, a simultaneous and common change of the quantities of supply to all consumption places.`

The boring 15 in the plunger drum coincides at each'suction stroke with the orifice of a suction pipe 16 in the cylinder 1, while the boring 17 in the plunger drum supplies the quantities of liquid at each pressure stroke through the pressure pipes 18 to the consumption places.

Obviously, the invention is not bound to the particular form of construction illustrated in Fig. 1, modifications thereof being possible withinthe scope of the invention.

For instance, as shown in Fig. 4, the member 4 could be integral With the Worm Wheel 3 and the central boring 5 provided in the upper part of the member 4a in which case the plunger 6 Working therein must be connected with the cam disc 7 and controlled by a tappet 19 in the member 43. The other reference letters in Fig. nate corresponding parts to those 1, namely: 1a the cylinder, 2 the Worm of the Worm gearing, 8a the pressure cams, 9a the pressure and suction cam, l()EL the adjustable cam pieces, 11a the j regulating screws for the latter, 12a the integral pressure cam race, 15 the boring in the plunger drum 4a, 16a the suction pipe in the cylinder .1*1, 17 the other boring in the plunger drum, and 18n the pressure pipe in the cylinder la.

Vhat I claim, is:

1. In a pump for a supply liquid tionplaces by means of one plunger only:

the combination of a rotaryplunger drum,

in Fig.

of different a Idsiclike extension on said drum, cams on.

said extension of a corresponding number to that of the consumption places and of which one forms a pressure and suction cam 4 desigquantities to a plurality of consumpand the others pressure cams only', all said cams having a common and simultaneous action, a suction cam race formed of separate cam pieces and an integral pressure cam race, Said races forming between them an endless cam groove consisting'of a num. ber of cam portions corresponding to that of the consumption places, substantially as set forth. v

2. A pump 'as specified in claim l, in

which all said cams are in Contact with said pressure cam race While the pressure and suction cam only is also in contact with said section cam race, substantially as set forth.

3. A pump as specified in claim l: in which each cam piece of said suction cam race is adjustable with reference to said pressure cam race separately and independently of the other cam pieces, substantially as set forth.

4. A pump as specified in claim 1, in which said integral pressure cam race is adjustable with reference to said suction cam race, substantially as set forth.

In testimony whereof I have hereunto set my hand.

LUDWIG LE BRET.

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