US435141A - Metallic steam-packing - Google Patents

Description

(No Model.)

DQ HANNBY. METALLIC STEAM PACKING.

No. 435,141. Patented Aug. 26. 1890.

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UivrTEn STATES PATENT Ormea..

DAVID IIANNEY, OF TURNER, ILLINOIS.

METALLIC STEAM-PACKING.

SPECIFICATION forming part of Letters Patent No. 435,141, dated August 26, 1890.

Application led December 24,1889. Serial No. 334,889. (No model.) A

To @ZZ whom t may concern.-

-Be it known that I, DAVID HANNEY, a citi- Zen of the United States, and a resident of Turner, county of Du Page, and State of Illinois, have invented certain new and useful Improvements in Metallic Steam-Packing, of which the following is a specification.

This invention relates to improvements in metallic steam-packing for piston-rods, valvestems, and the like, and has for its prime object to dispense with the employment of springs interposed between the packingrings and the casing, and to have the packingrings held in close contact with the rod by a spring y force independent of the walls of the Stuffing box or casing.

A further object is to combine with the packing-rings a metallic packing of such a character as to close the passage between the packing-ring and rod on the side opposite to nat to which pressure is applied, and which so renders the joint between the rings steamight.

AFliese objects are attained by the devices D lustrated in the accompanying drawings,in

f eichv Figure 1 represents a central vertical sectffw through a stuffing-box, showing a metalli steam-packing therein embodying my invention; Fig. 2, a transverse vertical section or the line 2 2 of Fig. l; and Fig. 3, a similar view on the line 3 3 of Fig. l, looking in the direction indicated bythe arrows.

t imiilar letters of reference indicate the same parts in the several iigures of the drawings.

Referring by letter to the drawings, A indicates the stuffing-box of a steam chest or cylinder provided with the usual annular chamberB,surrounding the piston-rod forreception of the packing, the outer end of which chamber is closed by a gland O, secured by boltD or otherwise to the flange of the stuffing-box. In, this case the gland is also recessed around the piston E, except toward the inner .end thereof, and screw-threaded for reception of a plug F, tting snugly upon the piston-rod, between which and the end of the recess is confined a packing G of waste or any other suitable material, such as is commonly used for this purpose.

lVithin the chamber of the stuffing-box, oc-

cupying about one-half the length thereof,is a series of packing-rings H, eccentric in form and sleeved upon the piston-rod. These rings are encompassed, preferably, by a single flat band-spring I, which, by reason of the peculiar form of the rings, bears only upon the eccentric portion of each ring, but has no contact with the walls of the stuffing-box, depending solely upon the contractile force thereof foi-binding the ringsagainst thepistonrod, which force willbe equally distributed between all the rings upon which it bears. Obviously two or more springs might be employed, according to the number of rings, which may also vary as desired; but; preferably only four are employed, as illust-rated in the drawings, the eccentric portion of two of which extends to one side of the piston, while the eccentric portion of the other two extends to the diametricallybpposite side of the piston-rod. These rings are maintained in fixed relation to each other, so that they will have no tendency to rotate upon the piston-rod, and thus destroy their effectiveness under the influence of the band-spring,by means of a dowel-pin J, extending through or partially through all of the rings, acting in conjunction with the piston-rod, upon which the rings are Sleeved, or a pin-and-socket connection between each pair of rings may be substituted for this dowel-pin. As a result of this construct-ion, each ring will be caused to press or bear tightly against the half of the`piston-rod on the side on which the eccentric portion thereof is located under the influence ol' the spring, which will also cause the wear of the rings to be automatically taken up, and leave the rings in effect suspended freely within the stuffing-box out of contactA with the walls thereof and free to move laterally with the piston-rod in its play.

Opposing the end of the innermost ring and iitting snugly upon the piston-rod is a split metallic ring K, the split portion of which lies upon the same side of the piston-rod as the eccentric portion of the ring H, over which iits a sectional ring O, into one section ot' which projects the end of the dowel-pin, and the whole is bound together tightly upon the piston-rod by a second and smaller bandspring M similar to the spring I. Sleeved upon the pist0n-rod next these packing de- IOO vices is a flanged collar N, between which and the inner end Wall of the stufingsbox is confined a powerful coiled spring O under considerable compression When the gland is secured in position. This spring e'tfectually serves to render the joints between the packing-rings stea1n-tight,while the split and sectional rings serve to seal the small and tortuous passage between the packing-rings and piston-rod on the side opposite to the eccentric portions of the rings.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

In a metallic steam-packing for piston and valve rods, the combination, with the rod and the stufling-box provided with an annular chamber surrounding said rod, of two or more eccentric packing-rings sleeved upon said rod at one end of the chamber, a band-spring encircling and bearing upon the eccentric portions of said rings, a split ri n g sleeved upon the rod opposing the inner eccentric ring, a sectional ring tting thereon, and a bandspring binding said split and sectional rings together and against the piston-rod, a collar also sleeved upon the piston-rod, opposing the split and sectional rings, and a coiled spring sleeved upon the rod and confined between said collar and the inner end Wall of the stuffing-box, substantially as described.

DAVID HANNEY. Witnesses:

R. C. OMOHUNDRO, W. R. OMoHUNDRo.

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