US619468A - John w - Google Patents

Description

I Patented Feb. l4, I899. J. W. DUDLEY. PISTON ROD PACKING.

(Application filed D c. 28,

(No Model.)

NITED STATES JOHN W. DUDLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO JOHN C. WILLIAMS,

OF SAME PLACE.

PISTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent No. 619,468, dated February 14, 1899.

Application filed December 28, 1897. serial No. 663,870. (No model.)

To all whom it may concern:

Be it known that 1, JOHN W. DUDLEY, of Chicago, Illinois, have invented certain new and useful Improvements in Piston Rod Packings, of which the following is a specification.

My invention relates to certain improvements in rod-packings, and is shown in the accompanying drawings in the preferred form of construction,which may,however, be modified as to structural details without departing from the spirit of my invention.

The object of my invention is to provide a packing which shall be economical in construction, durable in use, efficient, and which will not introduce or occasion undue friction.

To this end my invention consists in a piston-rod packing preferably made up in the form of a ring or annulus, the body of which is composed of a soft metal, such as lead, substantially of U or horseshoe shapein cross-section, and inclosing within such bodya filling material,preferably a lubricant, such as plumbago. To retain the ring in itsimparted form and the filling material in place, I may wrap or incase the ring with a fabric or other covering in the form of a tube or tape.

In the accompanying drawings, Figure 1 is a plan view of abroken portion of a rod sectional through a stuffing-box, showing three of the rings applied thereto, one of the latter being in broken section. Fig. 2 shows the ring in an incomplete stage of manufacture; Fig. 3, a completed ring, and Fig. 4 one of the rings with its ends separated and its body twisted to enable it to be applied to the rod intermediate the ends of the latter.

In the drawings let A represent the head of a stuffing-box, and B the gland thereof.

C is the rod.

The packing-ring is composed of the softmetal body D, which may be obtained in the form of a sheet and bent into U shape in cross-section.

E represents a body of filling material, preferably a lubricant, such as plumbago, and F the fabric, jacket, or wrapper, which is most conviently applied in the form of a tube, but which may be wound spirally around the metal body and its core in the forrnof a tape.

The ring when completed has a flattened side, the edges of the metal bodyD presented toward the rod or other moving part. As the wear progresses the rings will be laterally compressed, thus causing their sides to approximate, and as the lubricant and the edges of the metal body wear away the transverse diameter of the ring will be decreased by the pressure of the gland of the stuffing-box,while a suitably tight joint will be at all times maintained by the corresponding elongation of the opposite diameter of the ring. The cross-section which I prefer to employ is substantially U-shaped, so that the edges of the ring, as well as the lubricant inclosed therein, contact with the rod.

I have found in use that this packing-ring is highly efficient and economical.

I claim- A piston-rod packing comprising essentially a metal body of annular'form curved in cross-section, the edges of the section being separated to provide an opening between them and adapted to contact with the rod, and a suitable filling material embraced within the cavity of the body and also adapted to contact with the rod, substantially as described.

JOHN W. DUDLEY. WVitnesses:

C. 0. LINTHIOUM, E. L. HUBER.

Images