US975313A - Metallic rod-packing. - Google Patents

Description

n?. BADEKER. MBTALLIG ROD PAQKING. APPLIOATION EILED MAY 11, 190s.

Patented Nov. 8, 1910.

2 SHEETS-SHEET 1.

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J. BADEKER,

METALLIC ROD PAGKIN G. APPLICATION FILED MAY 11, 1909.

975,31 3. Patnted Nov.8,1910.

2 SHEETS-SHEET 2.

'ci/wr f To all whom it may concern:

mara sans rara FFf@.

JOHN BADEKER, OF OMAHA, NEBRASKA, ASSIGNOR OF ONE-HALF TO N. W. QANDEBSON,

' 0F OMAHA, NEBRASKA.

MnrALLc nonracxrne.

Specication of Letters latent.

Patented nav. e, raro.

Application filed May 11, 1909. Serial No. 495,363.

` 'Be it known that I, J oHN Bananen, a. citi- `Zen ofy the Umted States, and a resident of "Qmaha, in the county of ADouglas and State i`of'Neb1aska, have mvented` certain new and useful Improvements in Metallic Rod-Packinggof which the following is a specifican tion.

` My invention relates to metallic rod packing, and it is the object thereof to provide a simple, inexpensive and eiiicient metallic packing for use especially on the piston-rodsv and valve-stems of steam engines.

My invention consists in the particular constructions, combinations and arrangements of parts hereinafter described and claimed.

Constructions enibodying my invention are illustrated in the accompanying drawings, in which-J Figure l is a longitudinal section through a packing gland havingmy packing arranged therein, Fig. Q is a front elevation of the packing ring, Fig. 3 is a similar view with the segments separated, Fig. 4 is a detail side elevation of one of the segments, Fig. 5 is a similar view showing a slightly different form 'for the reduced ortions of the ring, Fig. 6 is a. detailfshowmg the ar rangement ofthe packing when a cone-cup is used for pressing the segments toward the rod, Fig. 7 is a similar view showing the cone type of the packing as arranged on rods of varying diameter, Fig. 8 is a similar detail of the spring-retained type of the packing, Fig. 9 is a. perspective View showl stuliing-boxB by studs 4, the packing being engaged at the inner side by a followerring 5, and saidffollower-ring being' pressed toward the gland by a spring G which encircles the rod and extends back into the shifting-box and bears against the neckring 7 I prefer to employ a single packing ring,A

which may be divided intoa plural number of segments S. Any suitable means may be employed for holding the segments in engagement with each other and for pressing themin toward the rod to con'ipensate wear between the same. I have illustrated in the drawings two different ways for so holding the segments in engagemcait with the rod. ln the. first method, which is illustrated in Figs. l to 5 and Fi 8 to 10, the segments are made substantially rectangular in section and are provided on their outer surfaces with circumferential grooves 9 in which are placed the annular coil springs l0. In this form of the packing the packing ring is pressed against the inner face of the gland 2 by the pressure of the spring 6 upon the follower-ring 5, and the segments are pressed toward the rod by the annular coil springs 9. The packing ring is also pressed against both the gland and rod by the pressure of the steam which enters the stuil'ing-boX and gland, and the packing serves to close, and prevent the escape of steam through, the opening between the. rod and the gland. ln the second method, which is illustrated in Figs. 6, 7 and 11, the segments are made substantially triangular in section, and are inclosed by an integral ring ll having a conical bore into which the segments are pressed by the spring-impressed followerring 5. In this form of the packing the .front face of the cone-ring 11 fits against the inner face of the gland Q, making a stea1n-tight joint therewith, and the packing ring serves to-close the opening and prevent the escape of steam between the rod and cone-ring. The pressure of the followerspring G and of the steam in the gland are both exerted on the rearward face of the packing ring which. owing to the triangular section thereof, is thus held in engagement with both the rod and cone-ring.

To enable the packing ring to close upon esl the ringto the outer or forward face thereof. The said abutting ridges may extend diagonally across the ends of the segments in either straight or arcuate lines, as shown in Figs. l and 5, or, in the ring of triangular section, the ridges may extend radially to the rod, as shown in Figs. 6, 7 and ll. In every case one end of the ridge engages the rod and the other end engages the other member with which the packing must form a joint in order to prevent the escape of steam from the gland, the latter member being either the cone-ring 1l, or the inner face of the gland 2. It is essential that the reduced portions of the ring be made of a relatively soft material, the exact nature of which may vary according to the temperatures and pressures to which the packing is exposed. The remainder of the packing ring may be of a material dilierent from and .harder than thatwhich forms the reduced portions or ridges l2, but the latter must be of a material capable of being distorted by compression, or upset, in or er to permit the ring to close upon the rod.

For rods having a uniform travel and which, therefore, maintain a uniform diameter, the abutting ridges between the ends of the segments are sufficient to maintain the joint and` prevent the escape of steam; but

on rods such as the valve-stems of loccmotives, having a variable travel and which, therefore, Wear hollow at the center, or spindle-shaped, the packing ring may close down to the smallest part of the rod so that when the larger portions thereof pass through the ring the segments separate slightly and permit a leakage of steam between the ends thereof. In packing for use in such cases as the latter, the segments are provided at one end with overlapping tongues lor flanges 14 and at the opposite end with recesses or rabbets into which the ilanges of the adjoining segments tit. In the cone type ofthe packing the flanges 14 need be provided only at the rearward side of the segments, as shown in Figs. 7 and ll. In the packing ring of rectangular section the ianges '14.- are provided at both the rearward and outer sides of the ring, as shown in Figs. S and 9. It will be obvious that when the overlapping flanges are employed, any slight opening between the upset abutting ridges l2 will not permit a leakage, since thejoints between the segments will still be closed by the said flanges.

It will Vbe observed that by the use of 'metallic packing constructed in accordance with my. invention, the friction and wear between the packing and rod will be reduced to a minimum, since the greater part oi the compressive. or closing-pressure exerted by the 'retaining-springs and steam upon the packing-ring will be received by and utilized in compressing and upsetting the reduced 5 portions of theY ring instead ot' causing an cx cessive and unnecessary pressure between the segments and rod.

Nowdiaving described my invention.what I claim and desire to secure by Letters Pal',- cnt is:

l. lin a metallic rod-packing, a gland, a packing ring having the transverse sectional area thereof reduced at a plural number ot points therein, and means embracing the ring to press the same toward the rod, the reduced portions of the ring being of material capable ol being upset by the pressure thereon and being adapted to conipletc a steam-tight connection between the rod and gland. Y

2. In a metallic rod-packing, a grind, a packing ring comprising a` pluralii'umber of segments, means embracing the ritig for A pressing the segments toward the rod,` and abutting ridges formed on the ends of the segments, the said ridges being of material capable of being upset by the compressive pressure thereon and being adapted to complete a steam-tight connection between the rod and gland.

3. In a metallic rod-packing, a packing ring comprising a plural number of segments, means arranged to press the segments toward the rod, ridges tormed across the ends of the segments, the said ridges being normally in abutment with each other, and flanges at one end of each of the segments, the said anges overlapping the ends olf the adjoining segments.

4.-. In a metallic rod-packing, the combination with a gland, and a sning-imnrcssed follower arranged therein, ol a packing ring arranged between the gland and follower, and means embracing the ring lo hold the same in cngagel'l'lent with the rod, the ring having portions therein of reduced transverse sectional area capable of being upset by the pressure of the embracing means together with the steam pressure within the gland.

In a metallic rod-packing, the combi nation with an inclosing gland, ot' a packing ring arranged therein and encircling the rod, the said 'packing ring consisting ol` a plural number of segments divided on lines radial to the rod, the ends ollhe segments having ridges formed thereon ol relatively soft material capable ol distortion by prcssure, and means arranged to press the segments toward the rod and hold said ridges normally in engagemci'lt with cach other.

G. In a. metallic rod-packing, the combination with an inclosing gland, ot' a. packing ring arranged within the gland and cn-` circling the rod, the said ring consisting of a plural number of segments. the ends of each of the segments haring ridges across the same of material capable ol distortion by pressure, each olI the segments ha ving at one end u flange extending bevond the ridge thereon and at the opposite end :1 rabbet i Subscribed my name in the presence of two adapted to receive the lunge of hondjoin ing segment, and resilient means arranged to press the segments toward the rod and hold the said ridges normally in engage-- ment with euch other.

In testimony whereoii` I have hereunto witnesses.

JOHN BADEKER.

ftnesses D. O. BARNELL, ROY G. KRATZ.

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