US1977806A - Valve - Google Patents

Description

9 1934- M. F. llcHARosow r 1,977,806

VALVE Filed Oct. 26, 1952 3 Sheets-Sheet .1

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1934- I M. F. RICHARDSON 1,977,806

VALVE Filed Oct. 26, 1932 3 Sheets-Sheet 2 WITNESSES: 22 INKENTOR: w&fl F Rtchgrdson, BY 7 v WW W i v m A TTORNEYS.

Oct. 23, 1934. M. F. RICHARDSON 1,977,306

VALVE 7 Filed Oct. 26. 1952 3 Sheets-Sheet 3 FIG. I.

WITNESSES: INVENTOR:

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Patented Oct. 23, 1934 UNITED STATES VALVE Maurice F. Richardson; Berwyn, 'Pa.

Application October 26,

4 Claims.

This invention relates to valves and more particularly to aligned alternatingly-operative' lift valves, such as the combination suction and discharge type commonly employed inpiston pumps,

The primary object of my improvements is the provision of a novel means whereby valve units of the typified character may be accurately aligned, positively adjusted to the spacing of their respective seats, and rigidly secured against service canting orothe-r derangement.

Another object is the provision of an adjustable stem for aligned combination valve units wherebytheir respective seats are spacially positioned in definite relation with incidental ensurement of proper balance between the valve elements, to the avoidance of frictional and other operating losses normally obtaining with similar types of such valves. 1 I

A further object is to provide a combination valve ofthe stated characterthat is simple and inexpensive of construction;andwhichmay be quickly and easily applied, adjusted, or removed for repair with a minimum expenditure of time and labor.

To the attainment of the foregoing and other objects, this invention consists of an adjustable valve stem and in certain structural refinements in valves of the aforesaid type and the combinations of parts, all as will be hereinafter more fully described, while the novel features are more specifically pointed out in the claims at the end of this specification.

In the accompanying drawings, I have illustrated practical embodiments of the invention, and in all of the views corresponding parts are designated by similar reference characters.

Fig. I is an axial vertical section of one practical form of suction and discharge valve combination including the instant improvements' Fig. II is a similar secticnal view of a modified form of the invention; and,

Fig. III is a corresponding illustration of a further modification.

Referring more in detail to the drawings, the numerals 5, 6 respectively indicate fragmentary opposed-portions of the decks of a conventional piston pump; and 7 is a similar section of the discharge passage or chamber Wall. As shown, each of the pump decks 5, 6 is formed with a tapering orifice for reception of the customary ported seat members 8, 9, respectively, under a force-fit; Whereas the discharge chamber Wall 7 is provided with a screw-threaded aperture 1.0,

for a purpose later on explained.

1932, Serial No. 639,553

As shown, the suction and discharge valve units are, generally designated in all the views as 11, 12 respectively, and they include, in addition to the aforementioned seat members 8, 9, movable valve discs 13, 14 for free passage over the valve stems or connecting members comprehensively designated at 15 in said views, sleeves lfi'applied thereon, .or other adjunctive parts, as later on pointed out. Associated with the valve discs 13, 14 are overhanging guards 17, 18, with interposed springs 19, 20, in compression, all of the aforementioned parts being in conformity with known practice except as hereinafter indicated.

Referring more specifically to Fig. I, it will be remarked that the suction valve guard 17 embodies an integrally-formed shank 21 that is screwed into a correspondingly-threaded axial hole 22 in the ported seat member 8, and further locked against displacement by an interposed sleeve 16, in the known manner. On the other hand,'the valve stem 15 passes through an orifice 23 centrally of the discharge valve ported seatmember said orifice being counter-bored at 24 to accommodate an appropriate medium for" frictionally retaining said seat member in position afteradjustment of the stem 15 relative to the suction valve 11; while said stem is screw-threaded at 25 into the overhanging guard 18. Now, it will be readily understood that by suitably manipulating the valve stem 15, the fixture of the valve units 11, 12 in proper spacial relation relative to their seats in the decks 5, 6, may be accurately determined but that, when so positioned, any loosening of either or both ported seat members 8, 9 may be readily compensated for. This adjustment or drifting of the ported seat members 8, 9 subsequent to initial force-fitment into the pump decks 5, 6 is conveniently accommodated by the conventional locking means 26 shown only in the upper part of Fig. II. This locking means 26 comprises a couplereclosure 27 for the aforesaid screw-threaded aperture 10, in the discharge chamber wall 7, said coupler-closure being fitted with an axial screw 28 having thereon a lock nut 29; said screw being forced into engagement with the upper end of the stem 15, or the top of the guard 18, in an obvious manner.

Referring now, specifically, to Fig. II, it will be seen that the valve stem 15 differs from the disclosure of Fig. I in that its lower section 30 is reduced in diameter relative to the upper portion 31, and that the end of said reduced section is screw-threaded at 32 into a head extension 33 of the suction valve overhanging-guard 17. The

' shank 34 of the discharge valve overhanging-' guard 12 is of tubular formation for free passage of the valve stem section 30, while the orifice 23 in the ported seat member 9 is not counterbored to accommodate axial adjustments of the valve stem. In this form of the invention, it will be clearly apparent that spacial positioning of the valve units 11, 12 relative to their seats in the decks 5, 6, is effected by coactive engagement set up by contact of the upper end of guard tubular formation 34 with the shoulder 35 of the valve stem 15, and the extent of threaded engagement of the stem end 32 in the suction-valve guard extension 33. In the form of my invention shown by Fig. III, which is more particularly devised for valve combinations wherein the ported seat members 8, 9, are flanged at their upper ends 8, 9' for ultimate forced seating-engagement on the respective decks 5, 6; it is to be noted that the valve stem 15 differs somewhat from the types of Figs. I and II, in that it embodies an intermediate portion 36, a diametrically-reduced lower part 37, and a correspondingly-reduced upper section 38, screw-threaded at 39 for engagement in the threaded axial bore 40, of the discharge-valve overhanging-guard 18. Still further, it will be observed that the reduced lower part 37, of the stem 15, passes through a central aperture 41 in the suction-valve overhanging-guard 17, and associated sleeve 16, for socket-reception in an axial boring 42 in the boss 43 of the ported seat member 8', with capacity for longitudinal adjustment to accommodate accurate spacial positioning of the respective valve units 11, 12 in the pump decks 5, 6, as hereinbefore set forth.

From the foregoing description it is thought the merits and advantages inherent to my improved stem 15, for aligned valve combinations of the type described will be self-evident. It is desired, however, to herein emphasize the advantage of my device in eifecting accurate spacing adjustments between the valves'll, 12 relative to the respective decks 5, 6, and the ease with which the associated seat members 8, 9 can be initially forced into firm engagement in said pump decks;

the positive and accurate alignment of all the movable and immovable parts; as well as the facility with which subsequent adjustments may be effected to compensate for displacements or derangements incident to heavy service, whereby the efficiency of such valves become impaired.

Furthermore, it is believed the foregoing descriptive matter fully establishes all the features of advantage inhering to my invention; while it is obvious minor structural changes of variations therein may be resorted to without departing from the scope of the following claims.

Having thus described my invention, what I claim is:

1. A connecting stem for aligned alternatinglyoperative lift valve units for pumps and the like having threaded engagement at one end in one of the units and axially engaging the top of the other, said stem being capable of axial adjustment to accommodate accurate spacing of the valve units relative to each other and their seats, and means coacting with the stem for rigidly securing the valve units after spacing.

2. A common connecting stem for aligned alternatingly-operative upper and lower valve units each including a stationary overhanging-guard to limit lift of the movable member, said stem having threaded engagement in one of the stationary guards and headedly coacting with the other guard to effect aligned accurate spacing of the valve units relative to their seats, and means for locking said stem after adjustment.

3. A connecting stem of the type claimed in claim 2 embodying an enlarged portion for shouldering abutment with the upper guard and" threaded engagement at its lower end in an axial boring of the lower guard.

4. A connecting stem of the type claimed in claim 2 embodying a medially-enlarged portion,

a lower plain extension for socket connection with the lower valve unit seat, and an upper section for threaded engagement in the upper unit stal tionary guard.

MAURICE F. RICHARDSON.

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