US1016689A - Annular metallic packing. - Google Patents

Description

J..HORT0N & T. W. KEEN.

ANNULAR METALLIC PACKING.

APPLICATION FILED 11111.4, 1911.

Patented Feb. 6, 1912.

2 SHEETS-SHEET l.

WITNEVSSES INVENTOFIS w'e m.

J. HORTON & T. W. KEEN.

.ANNULAR METALLIC PACKING.

APPLIGATION FILED JANA, 1911.

Patented Feb. 6, 1912.

2 SHEETS-SHEET 2.

I v I I l l l l L I I x I X I.

' WITNESSES [21,. 41W aha/M4.

v iwv vnl i W i in .nl ill. N no Elf-LIKES ft-IOHIUILI, OF MUNHALL, AND THOMAS W. KEEN, F SVIISSVAL'E, PENNSYLVANIA.

ANNULAB METALLIC? PACKING.

v Specification of Letters Patent.

Patented Feh. ti, 1912.

Application filed January 4. 1911. Serial No. 800,701.

had to the accompai'iying drawings, part of this specification, in

a. side elevation, partly in sectly broken away, showing one lVQlltlOIl as applied to a piston;

low of the some partly s 3 and lere detail views is a sectional. side elevar invention 41S applied to the i 12 pi a pla n view or the packing ring orrangement; Fig. 7 is an edge view of Fig.

: n u w h; and Figs. 8 and 9 are detail views of parts of the metallic packing.

@ur inv ntion relates to the packing of oircui'er annular ports in reciprocating innings. 510., wherein one circular p. re iprocotes post another. It. is ofespe ciui use in cv eve where :i comparatively l'llLf'l) measure is developed such nsin gas or other KU OSIVB engines, whether or double-a ti ln in c of pistons in explosive engines,

it tonne that the high pressure developee, fcspecitdly at, or near the beginning of the ignition stroke, .vlll enter in the rear of the ordinary springqi acliinp' rii'ig's and force them out with such pressure that the wear causes shoulders to form in the cylinder at the or ls of the stroke. T iis excessive wear 9 and shouldering grives'sueh cylinders n coni- }'):.irutivelv short; life and cause trequent rebor'. The same effect also seen on the rods of engines, this being portly t e interior of the cylinder. in

(luv 0. on is desgned to lessen. or n rcl'nr this diilienlty and lhl'jO sists 1n tiling a. fluid-pressed clamping devi which will hold the packing ring or rules sive outward pressure; as Well .c'vent this pressure from enter- ;ieh rings.

wings. referring to-the form of Figs. 1. to 4:.in'eluslve, in which We show. a preferred ziorm of the invention asepconnty Pennsylvnnia, have invented it full, clear, and exact description reference ton rod in the c 'linder head caused hy the paelrings in the head which.

he of the ordinary. elastic spring type; and

before these are inserted we snap into this annullnvrecess the split clamping ring 7, 0 which. is shoull'lcred :is Shown at. 8 so that the base portion wider than the exposed portion. This ring is split at one point in'its iieriphery, that it may be snapped into the annular groove, and. is m'efernhly of such length that when expanded under the heat of working its ends will substantially abut and prevent the entrance of fluid pres: sure at this ahiltting joint. These ends may also, of course, he scarted or otherwise joined, hut {UK} preferably arranged so to substantially prevent the inlet of fluid.

The face of the piston is providml with a, series of inlet holes 9, of which any desired number may be used, these leading into the 8 face of the clamp ng ring opposite to that. face contacting with the packing ring 6. inch face is preferably provided with an annular recess lO to allow the fluid entering through the holes to pass around and contact 50 with this cntir "face of the clmnpiug ring. We have shown five of these holes through each face, though any desired number may he used.

In the operation of the device. the fluid pressure in the cylinder enters the holes 9, by acting; upon the recessed face of the clamping ring, ill fo ce this clamping ring against the packing 'rinp; G and thereby clamp it against the opposite wall of its con 1% tnining recess. The clamping ring is made it careful nesit fit. so that little. it any, sure will pass underneath the clamping; ring: and. packing ring to force the nching; ring only Such a small amount of pressure creep ing in. is so much smaller than the pressure exerted upon. the clamping. ring to chimp the packing ring in place, that the packing ring will he held against excessive forcing out takes place alternately, first on one side of are located between the outer-packingv the piston and then upon the other at the explosion strokes. As the intermediate packing rings 4 and rings, there is little or no need of arranging these with the clamping rings and supply orts as above described, though they may e so arranged if desired. In Figs. 5 to 9, inclusive, we show the invention as applied to the packing gland in the head of a cylinder and surrounding the piston rod. In this case 11 is' the piston rod,

12 the head of the: cylinder, and 13 the gland which is removably' tap-bolted to the head. This'gland may "contain a series of metallic packing rings 16' and 16' of any usual or desirable type, and especially for the rings in the groove nearest to the interior of the cylinder we applyour invention as above disclosed. In this case 14 is the, twopiece clamping ring, which is otherwise similar to the ring of the first form, and 15- are the pressure holes leading to the recessed fac'eof' this ring. These holes allow fluid topass through the head ,of the cylin der and to the face of the ring so as to clamp the packing rings 16 firmly in place.

We have shown three sets of these rings, one

set containing three, and 'the, other two sets containing two each, in the gland, these being pressed against the dividing. wall 17 of the gland, by the fluid pressure on the clamping ring. The'packing rings 16 in the form shown, each comprise'two shapes, one shown'at 18 in Fig, 8, and the other at 19 in 'Fig. 9. The annulus is made up of these alternate shapes, and the joints of one annulus are arranged instaggered relation to those'of the next and heldby the encircling spring ring 20. In this case, a relatively stationary packing around a relatively movable cylinder, the action is, of course, the same as in the case of the movable piston carrying the rin except that the packing action is a con racting-one around the piston rod. By the word expansible in our claims we intend to cover either outward expansion orinward expansion; as for example, in the two forms shown.

The advantages of our invention will be obvious to those skilled in this art, since excessive outward pressure on the packing rings 1s avoided, and thereby excessive wear and shoulderin of the cylinders or piston rodsis;lessene or avoided.

The system is simple, may be cheaply made, and is not liable to get out of order. The amount of pressure upon the clamping rings will .be'proportionate to the presstlre exerted by the explosive charge.

The invention may be applied to single or double-acting cylinders, the form and arrangement of. the fluid-pressure-actuated clamping device may be varied; and other changes may be made without departing from our invention.

We claim 1. A packing device-for piston heads having an annular groove onveach end thereof,

a split packing ring seated in each groove, a sectional clamping ring seated .in each of .said grooves for clamping the rings against the walls of the grooves, there being ports leading outwardly through the walls of the piston heads from the grooves, said ports being arranged to permit fluid pressure to act upon the clamping rings to force them in a longitudinal direction to clamp the packing rings against the walls of the groovesto prevent expansion of the packing rings byfluid pressure, each of said clamping rings being arranged to be acted upon by the fluid pressure when the piston -is moved in one direction and free from the actionof the fluid pressure during its movement in the other direction and means for preventing radial movement of the clamping ring sections; substantially as described.

'2. A pacln'ng device for fluid pressure cylinders having an annular groove, a split packing ring seated in said groove, a sectional clamping ring seated withln said groove, there being ports from said groove to admit fluid pressure to the side of the clamping'ring to clamp the packing ring against the wall of the groove to prevent expansion of the packing ring by fluid pressure, and means for preventing the expansion of the clamping ring by the fluid pressure; substantially as described;

:3. A packing devicefor piston heads, having an annular groove, a'split packing ring seated in said groove, an annular flange have hereunto A ES non'ron, THOMAS w. KEEN.

Witnesses: l

J. A. HAMILTON, W. H. Comsr'rr.

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