US2727414A - Pump cylinder boring tool - Google Patents

Description

Dec. 20, 1955 .1. H. BADDERS, SR 2,727,414

PUMP CYLINDER BORING TOOL Filed June 5, 1953 2 Sheets-Sheet 1 'C/G- I 59 IN V EN TOR.

Jess/ H 1451400525 52.

Dec. 20, 1955 J. H. BADDERS, SR 2,727,414

PUMP CYLINDER BORING TOOL.

Filed June 5, 1953 2 Sheets-Sheet 2 V F/G 4 4 IN ENTOR Jose/ 14 H.5Ao0e/es Se.

United States Patent 3 2,727,414 PUMP CYLINDER some TOOL Joseph H. Badder's, Sr., Iiiberty, Tex. Application June s, 19ss,--seria1 No. 359,857 2 Claims. c1. vi 57 This invention relates to portable reaming or machim ing devices and more particularly to -a portablerearning device for reshaping the valve seat receptacles in sludge pump cylinders. v I I, H

Lt is amongth'e objects of the invention toprovidean improved portable reaming device which can be rigidly attached to the open end of a sludgepump cylinder and manually operated, if desired, to reshape the valve seat receptacle or receptacles in such apump cylinder after the receptacle has been repaired by building up the worn surface thereof with welded on materiahwhich is efiective to reshape the valve seat receptacles to the pi oper annular shape and longitudinal taper'to closely receive the associated tapered, annular valve seat; which is adjustable for variations in the diameter and taper of the valve seat receptacles of difierent pump cylinders; which can be easily mounted upon and removed from pump cylinder; and which is simple and durable in construction, economical to manufacture, easy to use, and accurate and elfective in operation.

Gther objects and advantages will become apparent from a consideration of the following descrip'tionand the appended claims in eon-junction -with the accompanying drawings wherein: W V a Figure l is a side elevatiohall view of a cylinder reaming device illustrative of the invention shown in association with a pump cylinder illustrated'in cross section;

Figure 2 is a cross sectional View 'o'n'the line 2 2 of Figure l; I e

Figure 3 is a top plan viewof the retaining device associated pump cylinder;

Figure 4 is a cross sectional View on'the line of Figure 1; and p I v p I M Figure 5 is a cross 'se'ctionalview on a somewhat en'- larged scaleon the line 5 5fof Figure 4; p v 7 With continued reference to the drawings, the pump cylinder, generally indicated at it), has'a'n open upper end normally closed by a cylindeiheadsecuredto the upper end of the cylinder by the holdidown'studs iatrnularly spaced apart around-the top ndef'the' cylirrder and has a downwardly tapered valve seatreceivingire} ceptacle' or chamber 1 2disp'osed coaxially'ofithe cylinder and spaced downwardly from the op'er'i'top' end of the cylinder, a discharge chamber 13 being disposed between the valve seat chamber 12 and the open top'end of the cylinder.

It frequently happens that thewalls of the valve seat chambers of cylinders of this character become worn, particularly where the valve 'seatsbecorne loose and abrasive containing sludge worksin'to the space between the outer wall of a valve seat and the corresponding wall of the valve seat chamber. After the valve seat chambers have become worn, and before a new valve seat is installed in the chamber, it is necessary to recondition a worn valve seat chamber by first building up the surface of the cham her with welded on material and then reshaping the surface of the chamber to closely receive the new valve seat, so that the new seat can be pressed into the valve seat 2,727,414 Patented Dec. 20, 1955 chamber and will tend to be fixed position in the pump cylinder.

The present invention provides a device for reaming or machining the built up surface of a valve seat chamber in a sludge pump cylinder to accurately reshape the wall of thecharnber to receive a new valve seat after the chamber has been repaired, as indicated above.

The device comprises a crossbar 15 having bifurcated end portions 16 and 17 which provide slots opening to the corresponding ends of the crossbar and in which corresponding hold down studs 11 projecting from the open, top end of the cylinder are received to firmly mount the crossbar on the top end of the cylinder, so that the crossbar extends diametrically across the open top end of the in proper operative cylinder.

At its mid-length location, the crossbar is provided with a hub formation 18 in the form of cylindrical sleeves 19 and 20 extending to respectively opposite sides of the crossbar and having'a common bore 21, the longitudinal center line of which is perpendicular to the longitudinal center line of the crossbar 15. When the crossbar is operatively mounted on the upper end of the'pump'cylinder 10, as illustrated in the accompanying drawings, the longer portion 19 of the hub formation extends upwardly from the crossbar, and the shorter portion 20 extends downwardly from the crossbar cylinder.

A tool bar 23 extends through and is journaled in the bore 21 of the hub formation 13 and extends outwardly of the opposite ends of the sleeve formation. Clamp collars24 and 25 are secured on the tool bar 23 at the upper and lower ends respectively, of the hub formation 18 to maintain the tool bar against longitudinal movement relative to the hub formation, and the portion of the 'tool bar below the lower clamp collar 25 has a wall thickness" materially greater than the remainder of the tool bar and is provided with a longitudinally extending slot 26 near the lower end thereof.

A Lil {shaped bracket 28 is mounted on the upper portion 19 of the hub formation 18 and extends upwardly from the" hub formation. A device operating shaft 30 is journaled 'in the bracket 28 with its rotational axis substantially at right angles to the rotational axis of the tool shaft 23 and a spur gear 31 is mounted on the shaft 30 between the spaced apart legs 32 and 33 of the 'U- shaped bracket. An idler shaft 34 is journaled in the bracket 28 below the shaft 30 with its rotational axis substantially perpendicular to the rotational axis of the gear 35, larger than the gear 31, is

into the upper end of the shaft 39', and a spur mounted on the shaft 34 and meshes with the gear 31. A beveled gear 36 is mounted on the shaft 34 adjacent the gear and a beveled gear 38 is mounted on the tool shaft 23 immediately above the upper clamp collar 34 and meshes with the beveled gear 36.

. With this arrangement, when the operating shaft 30 is rotated, the tool shaft 23 will be rotated at a reduced speed.

Various means may be used for rotating the operating 30, but in the accompanying drawings a hand crank -39 is shown mounted on this shaft for applying the operating power to the reaming device.

A grooved guideway 40 extends longitudinaliy of the lower portion of the tool shaft 23 and is provided with alongitu din ally extending slot registering with the slot F 26 in the tool shaft and with longitudinally extending grooves disposed one at each side of the slot therein. This guideway is pivotally connected at its lower end to the lower end of the tool shaft 23 by a pivotal connection 41 and is connected at its upper end to the tool shaft by a lost motion connection including a pin 42 extending between spaced apart gears disposed one at an eye formation 43 in the guideway having an aper..

ture transversely elongatedin a direction toward and away from the tool shaft 23. A set screw 45 extends through a tapped hole in the upper end portion of the guideway 40 and bears at one end against the adjacent surface of the tool bar 23 to vary the inclination of the guideway relative to the longitudinal center line or axis of the tool bar 23.

A carriage 48 is slidably mounted in the guideway for movements longitudinally of the guideway, and a cutting tool 49 is adjustably secured at one end in a tool receiving recess in the carriage 48 and projects outwardly from the carriage for engagement with the surface of the valve seat chamber 12 of the cylinder 10 on which the device is mounted.

The cutting tool 49 is secured in the carriage 48 by a set screw 50 threaded through a tapped hole in the carriage and bearing at its inner end against the cutting tool, so that the tool can be adjusted inwardly or outwardly relative to the carriage to adjust the device for variations in the radial dimensions of valve seat chambers to be reconditioned by the device.

A block 52.is slidably disposed in the lower portion of the tool shaft 23 and an arm 53 is secured at one end in a transverse aperture in the block 52 by a set screw 54 threaded through a tapped hole in the bottom end of the block and bearing at its inner end against the arm 53. The arm 53 extends through the slot in the guideway 40 and through a transverse aperture in the carriage 48 to transmit tonque from the tool shaft 23 to the carriage 48 and the cutting tool 49, so that the cutting tool will be carried around the valve seat chamber 12 in the associated pump cylinder when the tool bar 23 is rotated by the rotation of the operating shaft and the gear train connecting this shaft to the tool shaft.

A screw shaft 56 extends through the tubular tool shaft 23 and has at its lower end a rotatable connection with the upper end of the block 52, as indicated at 57, and at its upper end this screw shaft is threaded through a tubular ,nut or sleeve 60 secured in the upper end of the tool shaft 23 by a set screw 61. A hand crank 62 is mounted on the upper end of the screw shaft 56 and is effective to rotate the screw shaft relative to the tool shaft 23.

When the screw shaft 56 is rotated relative to the tool shaft 23 the block 52 is moved longitudinally of the tool shaft, upwardly or downwardly, and the tool carriage 48 and cutting tool 49 will also be moved in the same direction corresponding to the direction of rotation of the screw shaft relative to the tool shaft. With this arrangement, and with the guideway properly adjusted, and the tool 49 properly adjusted relative to the tool carriage 48, as the crank 39 is turned to rotate the tool shaft 23, the cutting tool will be moved around the wall of the valve seat chamber 12 and, as the screw shaft 56 is rotated relative to the tool shaft 23, the cutting'tool will be moved upwardly or downwardly, the two operations being preferably combined, so that a continuous cut is taken from the wall'of the valve seat chamber 12. After the first out has been taken from the wall of the chamber, additional cuts may be taken, if necessary, to reduce the chamber wall to the exact size and shape desired and properly condition the surface of the wall with a fine cut at the end of the cutting operation.

The device can be quickly and easily mounted on a pump cylinder and properly centered relative to the cylinder by the hold down studs 11 engaged in the bifurcated ends of the crossbar 15 of the device, and the cutting operation can be performed in a rapid, steady and accurate manner to recondition the valve seat chamber to exactly fit the valve seat to be inserted therein.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is, therefore, to be considered in' all respects as illustrative and not restrictive, the scope of the invention being indicated by' the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are, therefore, intended to be embraced therein.

What is claimed is:

1. In a device for boring valve seat chambers in sludge pump cylinders, a support adapted to engage across the open end of a pump cylinder, a hub formation on said support having a bore extending therethrough with the longitudinal center line of said bore perpendicular to the support, a tubular tool shaft journaled in said hub formation','said tool shaft having a longitudinally ex tending slot near one'end thereof, a guideway pivoted on said tool shaft at a point adjacent to said slot and adjustable to various inclinations relative to the longitudinal center line of said tool shaft, a tool carriage slidably mounted on said guideway for movement 1ongitudinally of the latter, a tool mounted in said carriage and extending therefrom for cutting the surface of the valve seat chamber in an associated pump cylinder when said tool shaft is rotated, a block slidably mounted in said tool shaft adjacent said slot and having a portion extending through said slot and engaging said tool carriage to transmit torque from said tool shaft to said tool carriage, a screw shaft extending through said tool shaft from the other end of the latter and having a rotatable connection with said block, means providing a screw thread connection between said screw shaft and said tool shaft for moving said tool carriage longitudinally of said guideway upon rotation of said screw shaft relative to said tool shaft, and means for rotating said screw shaft.

2. In a boring tool, a support, a tubular tool shaft journaled through said support, said tool shaft having a bore extending therethrough, and a side wall provided with a longitudinal slot located at one end of the tool shaft, an elongated guide pivoted at one end thereof on the exterior of the tool shaft at a point near one end of said slot, adjusting means acting between the tool shaft side wall and the remaining end of the guide for tilting the guide away from the tool shaft at different desired angles to the axis of the tool shaft, a tool carrier engaged with said guide, for movement longitudinally of the tool guide, a slide block in the bore of the tool shaft, an element on said slide block projecting outwardly through and engaging said slot, said element having a portion engaged with said tool carrier, first means for imparting end-wise movement of said slide block in the bore of the tool shaft for moving the tool carrier along said guide, and second means for rotating said tool shaft relative to the support.

References Cited in the file of this patent UNITED STATES PATENTS 1,091,914 Curtis Mar. 31, 1914 FOREIGN PATENTS 20,615 Great Britain Nov. 26, 189 1

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