US845033A - Stuffing-box. - Google Patents

Description

PATENTED FEB. 19, 1907.

P. GIBLOW, SE.

STUFPING BOX.

APPLICATION FILED JULYSI, 1905.

' FREDERICK GIELOW, SR.

un on.

, or cnIoAeo, ILLINOIS.

s 'uFFme-Box,

No. sas es.

Specification of Letters Patent.

Application filed July 31, 1905, Serial Nb. 271,972-

To all whom it may concern.-

, Be it known that I, FREDERICK GIELow,

Sr., a citizen of the-United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new ,and useful Improvementsin Stuffing-Boxes, of

. which the following is a specification, and

which are illustrated in theaccompanying drawings, forming a part thereof.

The invention relates to a device for securing a joint impervious to fluids between a movable rod and the wall of a vessel through which it leads.

More particularly the invention relates to such a device in which a tight joint is obtained by compressing a quantity of packing material into. a chamber or cavity formed in the wall of the vessel about the rod.

The object of 'the invention is to simplify the construction and operation of devices of this kind, to increase the efiiciency and duraing-boxes.

bility, and to provide a joint affording less frictional resistance to the movement of the rod than has heretofore been obtained;

The invent-ion consists in-the improved structure to be hereinafter more particularly described and claimed, and which providesachamber for receiving the packing material,

having lateral openings through which suitable followers are adjustably and yieldingly advanced to compress such material upon therod.

A further detail of the invention consists in the use of flake graphite moistened with water or oil as a packing material in stuff- In the accompanying drawings, Figure 1 is an elevation, partly in vertical sectlon,

" showing one form of the device applied to the power-cylinder of a fluid-motor. Figs. 2 and 3 are-sectional viewson the lines 2 2 and 3 3,respectively, of Fig. 1. Fig. 4- is a longitudinal section showing a modified form of the device 'fFi-g. 5 is a vertical sectionon the line 55 of Fig. 4, and Fig. 6 is a sectional detail showing another modification-in the construction.

In Figs. 1, 2, and 3 a detail of the rod of a fluid-motor appears at 10, the device of the invention being shown as employed for pre venting the escape of the actuating. fluid.

, from the power-cylinder 11 betweenthis rod head 12, through which it leads.

and the walls of an aperture inthe cylinder- A steampoi't 13 is provided for the power-cylinder, and the usual piston-head appears at 14.

On the outer face of the cylinder-head is a box-like casing 15, which is pierced by the piston-rod 1'0. As-shown in the drawings, the walls of this casing are formed integral with the material of the cylinder-head 12 and are apertured at 16 and 17 to receive the pie,- ton-rod. The casing is chambered, as indicated at 18, the chamber being preferably of rectangular cross-section and extending rod from end to end of the casing.

A quantity of packing material 19, preferably graphite, is introduced in the chamber 18 and is compressed upon the sides of the rod by suitablefollowers 20, shown as twoin number and operating from opposite. directions. Each-of the followers has a rectangular body portion 21, adapted to slide within the chamber 18, and a tapering or wedgelike'face 22 for bearing upon the packing .gages the hollow interior of the shank of the corresponding set-screw for maintaining the correct alincmentof the parts.

To form a seat for the packinghmaterial designed to efficiently prevent leakage between the packing and the side walls of the chamber18, there is provided upon the in 'terior of each of these walls an annular shoulder 28, surrounding the aperture, as 16 The followers 20 are admated Feb. 19, 1907. 1

in a direction perpendicular to the axis of the 17. This shoulder is conveniently formed by introducing a sleeve or collar'29 into eachof the apertures, such sleeve being of sufficient length to extend a short distance into the interior of the chamber 18 and being of too the required size to loosely receive the rod 10. They are preferably secured in place by having a threaded engagement with the walls of the chamber, as most clearly shown in Fig; 1. I

In settilu, up the device for use the caps packing material introduced into the chamber 18 in front of the followers 20. The caps 23 are thenreplaced and the set-screws 25 *23 wilL-beremovedand a quantity of the 1 turned so as to bear on the springs 26 with the rod and the packing material.

one or both of the set-screws 25. Preferably there is provided a lock-nut upon each of the set-screws for engaging the outer face of the cap 23 to maintain any desired adjustv ment of the parts.

By employing a packing material 19 of mineral graphite, which is preferably-used in flake form and prepared by moistening with water or oil until it assumes a pliable consistency, a durable joint is obtained, affording but little ,frictional resistance to the movement of the rod.

If desired, the casing 15 may be formed independently of the walls of the chamber or vessel out of which the movable rod which it is intended to pack leads, as shown in Figs. 4 and 5. It is then preferably provided with a threaded nipple 31, by means of which it may be attached to a correspondinglythreaded boss 32, formed on the wall 33 of such. a chamber. When the device -is constructed in. this form, the cap 23 mostconveniently has a threaded engagement with the casing 15, asindicated at 34.

In Fig. 6 the device-is shown as provided with adeaf-spring 35 for advancing the followers 20 this form ofspring being preferably emp oyed when the device is constructed in the largersizes. By providim the followers ,with the tapering or wedge like face described a spreading effect is. produced upon the packing material, the tendency being to crowd it toward the intersection of the inner wall of. the packingchamber and the movable rod, where otherwise leakage would be most likely to occur. Leakage between i the wall of the packing-chamber and the packing material is further avoided "by means of the shoulder 28, against which the packing material is forcibly compressed by the s reading action of the follower.

I c aim as my invention p 1. The combination with a movablerod, of a stuffing-box therefor having a chamber crossed by the rod, a packing material within the chamber and a follower operating upon the packing material at an angle. to the axis of the rod and having a wedge-like face, the

rod.

2. The combination with a'movable rod, of a stuffing-box therefor having an oblong rectangular chamber crossed by the rod, the longer axis of {the chamber being transverse to the rod and the chamber having openings at its ends, a removable cap-plate for each of such openings, a plastic acking material within the chamber, oppositely-disposed followers bearing on the packing material, each of the followers having awed-ge l-ike face,the edge of the wedge being transverse to the axis of the rod, and a spring reacting between each of the followers and one of thecap-plates.

3. The combination with a movable rod, of a stuffing-box therefor having a chamber crossed by the rod, a packing material within the chamber and a follower operating upon FREDERICK GIELOW, SR.

Wi nesses':

CHARLES B. GmLson,

E. M. KLATOHER.

edge'of the wedge being transverse to the the packing material at an angle to the axis 7'5

Images