US770016A - Metallic piston-rod packing. - Google Patents

Description

No. 770,016. PATENTED SEPT. 13, 1904.

F. S. MILLER.

METALLIC PISTON ROD PACKING.

APPLICATION FILED MAY 18, 1904.

NO MODEL.

ll/zf'izegses; M Ivdazgfar:

UNITED STATES Patented September 13, 1904.

FRANK s. MILLER, OF GRESTON, IOWA.

METALLIC PISTON-ROD PACKING- SPECIFICATION forming part of Letters Patent No. 770,016, dated September 13, 1904.

' Application filed May 18, 1904. $erial No. 208,543. (No model.)

To all whom it may concern.-

Be it known that I, FRANK S. MILLER, a citizen of the United States, residing at Creston, in the county of Union and State of Iowa, have invented certain new and useful Improvements inMetallic Piston-Rod Packings; and I -do hereby declare the following to be a full,

. clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a novel construction in a metallic packing for piston-rods and the like and means for mounting same, the object being to provide a packing which is simple and eflicient and in which all wear will be readily taken up without the exercise of undue friction; and it consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings, illustrating my invention, Figure 1 is an end elevation of the piston-rod packing constructed in accordance with my invention. Fig. 2 is a section of same on the line 2 2 of Fig. 1. Fig. 3 is a similar section of a slightly-modified form of construction. Fig. 4: is a central longitudinal section of the stufling-box end of a cylinder, showing the manner of mounting my said packing therein.

My said packing consists, primarily, of an outer ring A, composed, preferably, of three segmental sections, each of which is slightly less than one-third of a complete circle, so as to leave free spaces between the meeting ends of said segments. In their outer faces said segments are provided with peripheral grooves B, adapted to receive a spring-wire C, by means of which said segments are held in relative position, said spring being adapted to exert a contracting pressure on said segments. On their inner faces at one end the said segments are provided with grooves or recesses D, forming an annular groove in the complete ring, the bottom of which is curved and is adapted to receive the segmental sections of one or more packing-rings E and F, the latter being likewise made of three sections, which break joint with the segments of said ring A and with each other. The said rings E and F are of such size as to entirely fill the groove or recess D and so that the outer end of the ring F is flush with the outer end of said ring A, such outer end being spherical. The rear corner of said ring A is beveled, as at G. It will be noted that the wire C, while exerting a contracting pressure on the segments of the ring A, also exerts a similar pressure on said rings E and F, and it will be further noted that the groove D is made flaring, the bottom of same being so disposed that pressure of same on the outer faces of the rings E and F will tend to throw the latter out of said groove. As shown in Fig. 3, a single ring H may be substituted for the rings E and F, particularly if it is considered advisable or desirable to decrease the length of the entire packing member.

My said packing-ring is mounted as follows: J, Fig. 4, indicates the stuffing-box end of a cylinder, which constitutes a cylindrical sleeve contracted, as at K, at its inner end and through which the piston-rod L passes centrally. Secured to the end of said sleeve J is a collar M, provided with an internal annular flange N. Bearing against the inner face of said flange N is a ring 0, which is L-shaped in cross-section and receives a similar ring P of smaller diameter, which is made in sections to enable same to be slipped over the collar Q of the piston-rod L, said rings 0 and P being adapted together to close the mouth of the collar M and form a bearing member against which the packing member abuts, such rings 0 and P being beveled on their inner faces to accord with the beveled outer face of the pack ing'member. The latter embraces the pistonrod L and is engaged at its rear end by a follower-ring R, which is made of a plurality of segmental sections and has a flaring mouth S, in which the beveled corner G of the packing member is received. The said follower-ring R is provided with an external annular recess T, the bottom of which is tapered and receives a ring U, the inner face of which is also tapered, so that when it is forced over said ring R it will tend to contract the latter. Abutting against a shoulder V in said sleeve J is a ring W, which fits in an annular groove in a ring X, composed of a plurality of sections :and between which and said ring U a spring Y is interposed, which serves to force said ring U upon said follower-ring R and the latter against said packing member, thereby exerting a contracting strain on the latterand holding same in contact with the rings 0 and P.

The said ring 0 is of slightly less diameter than the inner diameter of said collar M, and said follower-ring R, ring U, and rings Vii and X are of slightly less diameter than the portion of the sleeve J in which they are con tained, thus permitting considerable lateral play of said parts, which obviously is advantageous, inasmuch as it prevents any of said parts from binding the piston-rod L if the movements of same should not be exactly true, as is often the case. It will be noted that the parts of said packing member wear the spring-wire C and follower-ring R will cause the same to be contracted to take up such wear, so that, a steam-tight joint is always assured. I desire further to call attention to the fact that the steam-pressure exerted internally will act to further produce a tightening of all joints, the pressure being exerted against the rings 0 and P to hold same more closely against the flange N and being exerted on the periphery of the packing member to further contract the latter.

My said packing is very simple and eflicient.

I claim as my invention 1. The combination with the cylinder and piston of an engine, of a sleeve mounted on one end of said cylinder through which said piston-rod passes, an inwardly-extending annular flange on the outer end of said sleeve having a greater diameter than said pistonrod to allow the latter lateral play, a packing-ring of less diameter than said sleeve disposed around said piston-rod and bearing against the inner face of said flange, a springactuated follower on said piston-rod having a flaring mouth, and a metallic packing member interposed between said follower and said packing-ring, said member comprising an outer sleeve composed of a plurality of segmental sections and provided with an internal annular groove, and a beveled outer face, and adapted to be received in and engaged by the flaring mouth of said follower, and a ring within said internal annular groove composed of a plurality of segmental sections adapted to bear on the piston-rod and breaking joint with the segments of said outer sleeve, said follower and packing member being of smaller diameter than said first-named sleeve.

2. The combination with the cylinder and piston of an engine, of a sleeve mounted on one end of said cylinder through which said piston-rod passes, an inwardly-extending annular flange on the outer end of said sleeve, having a greater diameter than said piston-rod to allow the latter lateral play, a packingring of less diameter than said sleeve disposed around said piston-rod and bearing against the inner face of said flange, aspring-actuated follower on said piston-rod having a flaring mouth, and a metallic packing member interposed between said follower and said packingring, said member comprising an outer sleeve composed of a plurality of segmental sections and provided with an internal annular groove, and a beveled outer face and adapted to be received in and engaged by the flaring mouth of said follower, and a ring within said inter' nal annular groove composed of a plurality of segmental sections adapted tobear on the piston-rod and breaking joint with the segments of said outer sleeve, and a split spring-ring disposed around and engaging said outer sleeve of said packing'member to contract the same.

3. The combination with the cylinder and piston-rod of an engine, of a metallic packing device on said piston-rod comprising a ring composed of a plurality of segmental sections and provided with an internal annular recess enlarged at its mouth, and having a peripheral groove, a split spring-ring lying in said last-named groove and exerting a contracting pressure on said segments of said sleeve, a plurality of rings each composed of segmental sections breaking joint with each other and with the segments of said outer sleeve disposed around said piston-rod and lying within said annular recess, and means engaging said packing member and a part of said cylinder for holding said member yieldingly in proper relative position on said piston-rod.

4. The combination with the cylinder and piston-rod of an engine, of a metallic packing device on said piston-rod comprising a ring composed of a plurality-of segmental sections and provided with an internal annular recess enlarged at its mouth, and having aperipheral groove, a split spring-ring lying in said lastnamed groove and exerting a contracting pressure on said segments of said sleeve, a plurality of rings each composed of segmental sections breaking joint with each other and with the segments of said outer sleeve disposed around said piston-rod and lying within said annular recess, and means engaging said packing member and a part of said cylinder for holding said member yieldingly in pro er relative position on said piston-rod, said means including a follower having a flaring mouth in which the said packing member is adapted to be received and exerting a contracting pressure thereon.

5. A packing-ring composed of a plurality of segmental sections and. provided with an internal annular recess of tapering annular form and having a peripheral groove, a split spring-ring lying in said last-named groove, and a plurality of rings each composed of segmental sections and disposed in the annular recess in said outer sleeve, substantially as described.

In testimony whereof I aifix my signature in presence of two Witnesses.

FRANK S. MILLER.

Witnesses:

RUDOLPH WV M. Lorz, F. SoHLo'rFELD.

Images