US734633A - Stuffing-box. - Google Patents

Description

No. 734,633. PATENTED JULY 28, 19013; i R. TITU'S. y

STUFFING BOX. 4

APPLICATION FILED FEB. 16, 1903.

H0 MODEL.

if? w wiigzsee s UNITED STATES Patented July 28, 190

: ATENT FFICE.

SPECIFICATION forming part of Letters Patent No. 734,633, dated July 28, 1903. Application filed February 16, 1903- Serial 143,621. (No model.)

To aZZ whom it may concern:

Be itknown that I, RICHARD TITUs, a citizen of the United States, residing at Bowling Green, in the county of Wood and State of Ohio, have invented a new and useful Stuffing-Box, of which the following is a specification.

1 This invention relates to stuffing-boxes em control the pressure thereon.

.In the drawings illustrative of the invention, in which corresponding parts are de noted by like designating characters, Figure 1 is asectional elevation of the device applied. Fig. 2 is a transverse section on the line 2 2 of Fig. 1. i

The improved device, as above stated, is

more particularly applicable to the stufti ng-.

boxes of the polish-rodsemployed in oil well operations and for the purpose of illustration is shown thus applied, representing a section of an ordinary oil-well tube, and 11 a section of the polish-rod operating therein.

The improved device consists of a box or base portion 12, having a threaded preferably reduced lower portion 13 adapted to be screwed into the internallythreaded upper end of the tube 10 and withthe upperend ofthe part 12 enlarged and externally threaded,

as at 14. The portion 12 will be formed with hexagonal wrench-surface (indicated at 15).

to provide for itsforcible connection with the tube 13. nular packingcavity in which the yieldable packing (indicated at 16) is supported, the

lower end of the cavity being inclined in the.

usual manner. The packing employed is the usual he.mp,rubber, or other'suit-able material employed for this purpose.

Movably engaging the upper end of the packing-cavity is a follower-gland 17, having inclined lower end operating in contact with the yieldable packing and with its upper end laterally extended to increase its upper bean.

Within the box portion 12 is an an leakage at all times.

tant feature of the invention and adds ma- ,teriallyto the value and efficiency of the infvention,*as it insures the constantandautomatic adaptation of the device to the rod no box portion 12 is an internally-threaded cap 7 19, engaging the threaded portion 14 and provid ed with a central aperture 20 in its upper end, through which the rod 11 passes loosely, as shown, the aperture being considerably larger than the rod, so that the latter will not contact with the cap. The cap portion 19 will be provided with a laterally-extended upper.

end 21, provided with spaced cavities to form ahand-gripto enable it to be readilyrotated for vertical adjustment upon the portion 14 and will likewise be preferably provided with a hexagonal wrench-rim (indicated at 22) to provide means for forcible rotation, if required. Between the inner surface of the cap member'l9 and the enlarged upper end 18 of the follower-gland 17 is .a spring 24, preferably of the cone spiral form, so that when completely com pressed it will occupy no more 7 space than one thickness of the wire of which it is composed. The spring thus exerts a constant force upon the follower-gland and maintains a corresponding uniform pressure upon the yieldable flexible packing l6 and automatically takes upany inequality in the wear and maintains a constant liquid-tight joint between the rod 11 and tube 10.

If by any chance inequalities occur in the rod 11, the spring acting constantly will yield -if the inequality is a protuberance and compress the packing into the depression if the inequality is in that form, and thus constantly and automatically adapt the packing to the outlines of .the rod and automatically follow up all the inequalities therein and prevent This is a very impormatter what its contour may be.

The cap 19 is formed with spaced vertical apertures 25 to provide means for the escape of any leakage around the rod and prevent it from being carried through the top of the cap or from flooding the cap. This is also an important feature of the'invention, as it obviates what has heretofore been a source of annoyance in connection with devices of this character.

The device may be adapted to any size of tube and polish-rod or to rods employed for other purposes, and I do not, therefore, wish to be limited in the use of the device to any particular form of rod or to rods employed for any specific purpose and reserve the right to the use of the device for all purposes for which it is adapted.

Having thus described the invention, What I claim is- A stuffing-box comprising a base or box portion externally threaded and surrounding the rod, and having an internal cavity be-

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