US1374405A - Self-alining piston-valve - Google Patents

Description

`SELF AUNING PlsToN' VALVE.' l APPLICATION-'FILED DEC. H, 1,919.

yat-ema Apr. 12, 1921.

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PHILIP HENRY sTEINi-:Iaor SAN FRANCISCO, CALIFORNIA.

SELF-ALINING PISTON-VALVE.

Be it known that I, PHILIP HENRY STEINER, a citizen of the United `States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Self-'filming Piston-Valves, of which the following is a specification, reference being had to the accompanying drawings.V f

This invention relates to an improved piston valve and an object of the invention .is to provide a device of this kind which.V is very simple and practical in construction and which is capable of alining itself .during its operations with relation to the interior of the valve chest.

Another object of the invention is to provide a piston valve, so mounted upon the valve rod that it is capable to movements relatively to the rod, so that it may easily aline itself with the wall of the chamber, in which it reciprocates, there being means mounted upon the rod to prevent laxial movement of the valve. j

A further object of ,the invention is to provide a piston valve structure, particularly adapted to eliminate all uneven weai` on the working `surface of the valve, that is to say, the worlng surface ofl the valves and the wall of the steam chamber in which the valve operates and also to provide a speciiic novel construction, whereby the valve may accurately aline itself, in order to reduce the wear to a minimum.

While the design and construction at present illustrated and set/forth is deemed preferable, it is obvious that as a result of a reduction of the inventionv to a more practical form for commercial purposes, the 1nvention maybe susceptible to changes, and the right to these changes is claimed, provided they are compreliended Vwithin the scope of what is claimed. v

The invention comprises further features and combination of parts, as will be hereinafter `set forth, shown in the drawings and claimed.

In the drawings:

Figure l is a view in side elevation of the improved piston valve constructed in accordance with the invention, showing the same engaging the walls of the chamber in which the valve operates.

Fig. 2 is a longitudinal sectional view through-the piston valve, more clearly showing the detail construction of the same and Specification of Iietters Patent.

Pateiiteii Ap1-.12, 1921.

Application led December 17, 1919. Serial No. 345,562.

lar 2 and an extension3, which extends beyond the collar, and is of smallerdiameter than the valve rod, the piston valve is mounted upon the extension 3 and isl'preferably constructed aswshowmthough not necessarily. In the presentform of construction the piston valve comprises a body 5, which is liollow and is provided exteriorly with cylindrical enlargements 6. In fact the greater portion ofthe center of the body `5 is of less diameter ythan the enlargements 6,.so as to provide a steam exhaust space 7, between the enlargements, whereby as the enlargements coperate with the usual steam ports 2l and exhaust ports 22 of the steam chamber (not shown) steam will be allowed to ,enter the cylinder, so as to enter the piston chamber `of the steamcylinder (not shown). u

The piston valve at its opposite ends is provided with head members 8 and 9,which are preferably cylindrical, though not necessarily and are connected to the inner portions of the enlargements 6 of the valvefby the radial parts l0. yIn fact the heads 8 and 9 together with theradial partslO constitute head webs for thevalve. It is to be noted that while the extension 3 passes throughthe head members 8 and 9,.there vis Y considerable looseness or play, so as to permitthe piston valve to move orrock relatively to the extensionV 3.

Mounted upon the extension 3 are adjustable collars o'r washers ll` and 12. Y The washer or oollar'll is arranged adjacent the collar 2 Vwhich is integral with the valve. rod.

curved bearings l5. The opposite ends of l Y the' head 8 and 9 of the piston valve are convexed spherically, as shown at 16. These concaved and convexed engaging faces are constructed on a radius equal to one-half of the total distance between the outer faces of the outer spherical convexed faces of the heads 8 and 9, For instance, the radius ofY the spherical ends of the heads 8 and 9 extend from the center 17 of the piston valve. The adjustable collarsor washers 11 and 12 have their openings of such diameters as to permit the collars to passover the extension 3, and yet allowed to neatly fit the extension so as to prevent movement of the 'collars radially with relation to the extension 3, which will be allowed sufficient movement vertically or'horizontally to permit adjust mentof the piston. The collar or washer 11 is. first placed in position against the integral collar 2, afterward the collar 12 is arranged in position, the concaved faces of bothfcollars facingl each other. After applying the collar or washer 12 a lnut 1X8 is threaded to thev extension 3, afterward a lock nut 19 is threaded on the extension, and having a transverse pin 20 to hold the nut 19 in place. l

It will be noted that while the piston valve s is in its reciprocating movements, the valve is capable of rocking between the spherically concaved faces of the collars 11 and 12, whereby the valve may aline itself to the walls of the lchamber in which the valve operates, therebyV reducing the wear upon the inter-engaging partsl of the valve and y the wall ofthe chamber.

A piston valve constructed along these lines. may have a prolonged life, and furthermore the cost of repairs may be reduced to a minimum, since the wear upon the cony tacting part of the valve, is considerably reduced.

The invention having been set forth, what Vis claimed as new is:

1. In a device as set forth, a reciprocating` rod having a piston valve carrying end, a slide piston Vvalve unit provided with opposite head members having axially alined openings, through which thevalve carrying end passes, the exterior opposite ends of the head members having spherical convexed portions concentric with the center of the piston valve, said rod having a collar integral with one end of the valve carrying` end, aremovable collar on the valve carr 1- ingr end adjacent said integral collar, a

second'removable collar on the opposite end of the valve carrying end of the rod, means for holding the Vsecond collar in position,

said removable collars being axially alined and having their adjacent faces spherically concaved concentric'with and coperatively engaging the spherical convexed portions of thehead members, the axially alined open ings of the head members being of diameters larger relatively to the diameter of the valve carrying end, whereby the valve is capable ments, the outer end yfaces'of which being spherically convexed conforming concentrically to and operatively engaging the spherical concaved faces of said collars, thereby preventing axialy movement of the unit, said head members having axially alined openings through which the valve carrying end` passes, said openings being larger in diameter relatively than the valve carrying end, thereby permitting the unit tc roclr in a plane at right angles to the valve carrying end on a radius from said approximate center of the valve carrying end.

3. In a self-alining piston valve, a reciprocating rod having a valve carrying end, spaced collars removably and operatively mounted on said valve carrying endand having adjacent sphericallyk concaved surfaces whose radii extend from an approximate center of the valve carrying end of the rod, a piston slide valve unit on the valve carrying end between the spaced collars which act to prevent axial movement of the unit, said slide valve unit having opposite axially alined head elements having axially alined openings of larger diameters than the valve carrying end of the rod and through which the rod passes, in combination with the remote outer end faces of the head elements being spherically convexed conforming concentrica'lly to and operatively engaging the spherical concaved faces of the collar whereby the unit may rock 'upon planes at right angles to the valve PHILIP HENRY. STEINER.v

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