US1160411A - Pressure-pump. - Google Patents

Description

n. HUFF.. PESSURE PUMP. APPLICATION FYLED )UNE2B, 19H.

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UNITED STATES PATENT OFFICE.

RUSSELL HUF?, F DETROIT, MICHIGAN, ASSIGNOB. T0 PACKARD MOTOR CAB. CODANY, OP DETBIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

PRESSURE-PUIG.

Speccation of Letters Patent.

Patented Nov. 16, 1915.

Original application led September 2. 1909, Serial Ho. 515,885. Divided and this application tiled June 28. 1911. Serial lo. $5,881.

Toallwkomitmoy conce-rn:

Be it known that I, Rossem. HUH', a citizen of the United States. and resident of Detroit. Wayne county. State of Michigan, have invented certain new and useful Irnprovements 'rn Mure-Pumps, of which the following is a specification.

This application is a division of my application, Serial No. 515,885, filed September 2, 1909.

This invention relates to pressure pumps and more particularly to an automatic calnoperated, air compreing pump for use in prsure systems. This pump .ls especially adapted for use in connection with the gasolene tank of a motor vehicle, to which it suppliespmreanditissonstructedasto be driven by the cam shaft of the motor of said motor vehicle The object of this invention is to provide an elicient., automatically operated pme pump, mounted upon the crank ease of a hyn or other motor, in an accessible position and adapted to be driven by the cam shaft of the motor which is Within the crank case.

It is also the object to provide a constructionofsuchacharacterthatalloftheparets may be easily laced in position or remov without disturbing the cam sluit or any of the other parts of the motor, and in which the of [Disassembly of the parts is practically eliminated In the drawings: Figure 1 is a vertical section of the pump taken on the line 1-1 of Fig. 3; Fig, 2 is a view of the pump partly in elevation taken on the line :2--2 of Fig. 3; and Fig. 3 is si plan view of the pump.

Referring to the drawings; 25 reprents a part of the motor crank case upon which the pump is mounted.

is the cam shaft of the motor edly mounted upon it the eccentric cam The rod Q8 provided with the eccentric strap l5 cut away as shown at 46, 46, imparts motion from the cam 27 to the piston 34. This cut away portion is of suicient size so that the eccentric strap 45 can be removed from the shaft by moving the. saine endvvise until it clears the eccentric 2T. and then moving the same vertically- The connecting rod 28 is connected to the piston 34 by the usual wrist-pin 47 held in place by the spring band 48.

The cylinder in which the piston 34 works 1s externally threaded and is closed by a cylinder head 35 which is provided with an internal thread engaging the thread on the cylinder.

A lock nut 35 is provided for locking the head in place.

The cylinder head is provided with a transverse paage 36 which may be formed therein in any suitable manner, preferably by boring the same, the hole being closed by a plug 36. .An4 outlet passage 37 intersects the passage 36 and connects with the pipe line 23 in any suitable manner, preferably by the ordinary union joint, as shown. A spring-controlled check valve 38 controls the connection between the paage 36 and the cylinder- A relief valve casing 39 is screwed into the cylinder head and is provided with a relief valve 40 controlled by a. spring il, the tension of the spring being controlled by an adjusting screw 42. A pipe 42 connects the cavity above the relief valve with the crank case `25. The cylinder is provided on its interior surface with a groove 43 which throws the crank case into communication with the upper part of the cylinder when the piston is in its lowest position, the communication however being cnt ol when the piston pwes the end of the groove, as shown-in Fig. 2. The base 30 is provided with downwardly extending portions forming guid -i-Lor the connecting rod 28. The base 30 forms one of the Acylinder heads.

It will be seen that the pump is of such a construction thatthe parts may be easily azsembled. The Guides 44 are in offset relation to the axis o the cylinder and so guide theconnecting rod that the pump is not affected by giving to the cam shaft 26 the usual axial movement for the purpose of relieving compression in the cylinders of the motor'in Starting. In hydrocarbon motors it is desirable to reduce the distance between the cam and crank shafts to a minimum in order to have the gears which drive the cam shaft of small size. and as a result there is very little space in which to operate the pump eccentric and the eccentric strap thereon. In order to prevent the eccentric strap from interfering with the connecting rods or cranks of the motor and also .to permit the pump t0 be removed Wit-houtA disturbing the. cam shaft 26 the eccentric strap is cut. away between the points 46, 46, this cut-away portion, as will 'De seen from Fig. 1, being slightly offsetrelative to the axis of the pump cylinder. 0n account of the minimum clearance between the parts of the motor and the pump it is absolutely essential that the eccentric Strap be placed in its proper position on the eccentric because otherwise the motor cranks would interfere with the eccentric strap when the motor was started- In order, therefore, to eliminate all liability of misaembly of the parts the guid -14 are arranged in offset relation to the axis of the cylinder and the portion '28 of the connecting rod which coperates withthegujdesisalsooisetsothatitwill be impossible to assemble the with the eccentric strap in other than its correct position on the eccentric 27.

The entire pump may be disassembled and disconnected from the valve shaft in the following manner: The bolts extending htheearsareremovedandthe cylinder 32 is removed from the piston by an endwise and upward movement` The pinoli is now removed from the connecting raibyremovngthebandandthe Wrist pin 47- The hase 30 is now removed from the connecting rod, and the connecting rodismovedtotheleftuntilthestrap' clears the eccentric 27, and then moved up wardly, the opening formed in the strap 45 clrngtheshaft. Thevalveshaft must be moved to the position shown in Fig. Qinorderthatthestrapmayclearthe eccentricl. Inordertoinsnrethatthe partsandmaybecorrectlyposiiioned eachofidpartsisprovidedwiththree ears31 and33,respectively,andtheerank case is provided with three tapped holes for receiving the hols extending through the ears.

The operation of the device is as follows: When the piston 34 descends, air is drawn into the upper part of the cylinder thegrooveandupontheretnrnofthe pistithisairiscomprcssedastobe forced out through the valve 38 into the palage 36 and then upward and outof the pipe'. Incasetoomnchpremeis evolved the excess may escape thr the relief valve i0 and pipe 42 back into the crank case.

1. In a pump, the combination with a easing, of a cylinder carried by the casing, a piston workingY in the cylinder, an operting shaft mounted in the casing. an eccentric on said shaft, and a connecting rod provided with an eccentric strap formed integral therewith and cut-away to clear the shaft, whereby the cylinder, piston and connecting rod may be removed from the casing withoutdisturbing said shaft.

In a pump, the combination with a cylinder, of a piston working therein, actuating means, a connecting rod having loose and separable connection with said means, and a cylinder head provided with guides for the connecting rod and detachably connected to the cylinder.

3. In a pump, the combination with a cylinder, of a piston working therein actuating means, a connecting rod having loose and separable connection with saidv means, a onepiece cylinder head provided with gnid for the connecting rod and detachably connected to the cylinder, and a detachable connection between the piston and connecting rod.

4. In a pump, the combination with a cylinder, of a piston working therein, an operating shaft, an eccentric thereon, a. connecting rod provided with an eccentric map cnc` away to clear the shaft, a one-piece cylinder head provided with guides for the connecting rod and detachably connected to the cylinder, and a detachable connection between the piston and connecting rod.

5. In a pump, the combinaon with a casing and a shaft mounted therein, of an eccentric on said shaft, a cylinder mounted on said casing, a piston for said cylinder, a connecting rod, and a guide for the connecting rod having an opening 'therein ose't rom the axis of the cylinder, said connect ing rod having a portion thereof adapted to be arranged in said opening, whereby the guide and connecting rod can be assembled in but one relative arrangement..

6. In a pump, the combination with a casing having a cylinder mounted thereon, of a piston working in slid cylinder, a head for said cylinder provided with a paage, an outlet connected to the passage, a connecton between the cylinder and the pesage, a check valve in mid connection, a relief valve for the paage., a pipe connedzngt-he relief valve with the interior of the caslng,

and said cylinder having a passage extending longitudinally thereof and adapted to connect the interior of the cylinder with the interior of the 0.

7. In a' pump, the co ination with a cylinder, of a piston working therein, a connecting rod, and a cylinder had detachably connected to the cylinder and provided with guides for the connecting rod arranged in oisetrelation to the axis of the cylinder, for the purpose described.

8. In a pump, the combination with a cylinder, of a piston working therein, a connecting rod, a cylinder head detachably connected to the cylinder and provided with guides for the connecting rod a in offset relation to the axis of the cylinder,

'and a detachable connection between the piston and connecting rod.

9. In a pump, the combination with a cylinder, of a piston working therein, an operating shaft, an eccentric on said shaft, a connecting rod provided with an eccentric trap having a cutaway portion adapted to permit the strap to be removed from said shaft laterally, a cylinder head detachably Copiesdthispatentmaybeobtainedtorvecentseachby connected with the cylinder, and a detach- 13 able connection between the piston and connecting rod.

In testimony whereof I aix my signature in the presen of two witnesses.

RUSSELL HUFF. Witnx'fei F .1

mom., r., F. A. SMITH.

addressing the Commissioner of Patents,

washington, n. c.

It is hereby certified that in Letters Patent No. 1,160,411, grunted November 16, 1915, upon the application of Russell Huff, of Detroit, Michigan, for an improvement in Pressure-Pumps, an error appears in the printed specification reqniring correction as follows: Page 3, line 7, claim 9, for the word "trap" read strap; and

that the said Letters Patent should be read with this correction therein that the seme may conform to the record of the euse in the Patent OfEce.

Signed and sealed this 14th day of December, A. D., 1915.

R. F. VYHITEHEAD,

Acting Commissioner of Patents.

[SEAL] Cl. 23o-27.

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