US739859A - Metallic packing for pistons, rods, &c. - Google Patents

Description

No. 739,859. PATENTED SEPT, 29; 1903.

W. S. HALSEY.

METALLIC PACKING FOR PISTONS, RODS, &0.

APPLICATION FILED ran. 14. 1902.

no MODEL.

FIGJ.

'- iio. 759355. I UNITED S' fg rss WILLIAM s. HALSEY, or Pin-sense, PENNSYLVANIA.

METALLiC PAcKme FORPISTONS, nous, are."

. intent ed epteruber 29, 1908.

srnctirtcarrorr forming part of Letters Patent No. 739,869,.dated September 29, 1bos.

musical ma mm u. 19oz. s nt No. .084. on model.)

To all whom it may cancel-1i:

Be it known that I, WILLIAM S. HALSEY, 0t Pittshurg, in the county of Allegheny and State of Pennsylvania, have invented a cer- 5 tain new and useful Improvement in Metallic Packing for Pistons, Rods, &c., of which improvement the following is a specification.

My present invention is an improvement upon-that for which Letters Patent ot the :0 United States, No. 671,651, were granted and issued to me under date of April 9, 1901; and its object is to provide a packing-ring by means of which, as in the device of latent No. 671,551 aforesaid, a fluid-tight joint may I 5 be made and maintained without undue friction between a cylinder and a piston, pistonrod, or plunger working therein, and which shall, further, be of such construction as to enable the expanding forces acting upon it so to be more effectively exerted and to be conveniently adapted for location and retention in operative position. The "improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a longitudinal central section through a portion of a cylinder fitted with a plunger or ram, illustrating an application of my invention; Fig. 2, a similar section through acylinder and piston with my invention applied to the latter; Fig, 8, a view in elevation of a packing-ring detached; Fig. 4, a diametral section through the same; Fig. 5, a view in elevation, showing'a modified form adapted 5 for application in a piston-rod etching-Jinn;

and Fig. 6, a diametral section through the same.

In the practice ofmy invention I provide a packing-ring which is formed of light sheet 0 metal possessing a greater or less degree of clasticity -a's soft steel, copper, or brasssaid packing-ring beiugmade by drawing a 'tiat annular plate of such metal into the form of an annulus of. U or'channel section. 'Ihe. 's inner shell 1 and outer shell 2 of the packingring are tapered orinclined from the intermediate annular connecting-body'otmetal-fi -oppositcly-that is to say, in the directions of the-fixed and the moving members, against 5 50 which, respectively, the shells are designed to abut, and the diameter of each shell at its end farther from' the connecting-body 3 is the here or the cylindrical body, as the case may As'shown in Fig. -11, my improvement is.

to the cylinder by bolts 7. The packing-ring 6c is fitted in a recess or counterbore at the end of the cylinder, with the openend of theannnlus facing the latter and the closed end resting on the cap 6. The fluid under pressure tween the inner and ontershells ot the packing-ring through ports 8, formed in the wall of the cylinder, and the pressure of said fluid and outer shells forces said shells against the recess in which the packing-ring is held and effects and maintains a fluid-tight jointbetween the plunger and cylinder without in- 75 ducing excessive friction or und'ue resistance to the movement of the plunger.

Fig. 2shows the application of myinzproved packing-ring toa piston 9, which is fixed upon.

in a fluid-pressure cylinder 11. The pistonrod works through a stufiing-hox provided with a gland 15. The packing-ring is fitted l in a circumferential recess on the piston 9 and is held in position by a follower 12, se- 83 cured to the piston by follower-bolts 13. Fluid under pressure is admitted to the space between the inner and outer shells of the packing-ring through ports 14, formed in the piston.' The shells are forced and held '0 against the bore of the cylinder and the circumferential bearing on the piston and tight joints with these surfaces made and mainiessdiameter than the piston-rod 10, against which it is pressed by its own elasticity and- 8 1 gr ater thanthe' diametsr o! 5 be, against which it isdesigned to abut.

illustrated asappliedior packing'the jointbe tween a plunger or ram 4, working in a 051- inderfi, and a head or cup 6, which is secured in the cylinder is admitted to the space he- 6:,

periphery of the plunger-and the bore of the tained by fluid-pressure and the elasticity of the shells, as in the instance first described. 5

actiugin unison with the-expansive-tendency of the oppositely-tapered or inclined-inner 7c a piston-rod 10 and is adapted to reciprocate 8c of packing-ring adapted" for application in piston-rod smiling-boxes. in this instance FL the outer shell 2 is; omitted and theiuuer 'f" shell 1 is inclined inwardly from theaterire};

the pressure of the fluid in the cylinder, i

- g which acts upon it thronghaloose fit between the piston-rod and the head of the cylinder. The packing-ring is held in position by clamping itsbodyhetween the cylinder-head and the gland 15.

' It will be seen that myimproved packingring is simple, light, and inexpensive in construction and that it may be readily inserted in-and removed from operative position relaro tive to a piston, plunger, or piston-rod. A

substantial advantage is attained in the capability of presenting a double obstruction toleakageoffluid withoutinvolvingincreased friction or additional members, this being I5 due to the expansion of the shells against both an inner and an outer surface and their connection by an integral and unbroken body, which forms with the shellsa chamber in which the expansive action of fluid under so pressure may be effectively exerted.

I claim as my invention and desire to secure by Letters" Patent- 1. A packing-ring formed of light sheet metal, possessing elasticity, drawn into an :5 integral and unbroken annular body and a.

shell and projecting from the innerside thereof, said shell being tapered or inclined away from the body to a diameter slightly less than that of the surface against which it is to abut when placed in operative position.

2. A pnckingring formed of lightv sheet metal possessing elasticity, drawn into an integral and unbroken annular body and inner and outer shells, said inner and .outer shells being slightly tapered or inclined in opposite directions from the intermediate annnlar connecting-body and forming therewith a-chamber of U or channel section.

3. The combination of a cylinder, a movable member, as a piston or plunger, fitted 40 to traverse therein, and an integral and unbroken packing-ring of elastic sheet metal, interposed between and bearing on the cylinder and the movable member, said packing-ring being of U or channel section and 4; having its inner and outer shells slightly tapered or inclined in opposite directions from the intermediate annular connecting-body, and abutting against the cylinder and movable member, with the annular chamber beso tween said shells open to the pressure in the cylinder.

4:- The combination of a cylinder, a piston fitted to reciprocate therein, an integral and unbroken annular packingring of elastic Q5 sheet metal of U or channel section fitted in a circumferential recess on the piston and having its inner and outer shells slightly tapered or inclined in opposite directions from an intermediate connecting-body, and bear ing, respectively, on the piston and the cylinder, a follower connected to the piston on the side of the recess thereof adjoining the body of the packing-ring, and a port in the piston for the admission of pressure to the chamber between the inner and outer shells or the packing-ring.

.. WILLIAM S. HALSEY.

Witnesses:

J. Snowman BELL, Cnannncn A.--Wtr.maus.

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