US2089773A - Oil seal - Google Patents

Description

ug. 10,:1937. R. J. vEDovELl. ET 1.

' OIL SEAL Filed NOV. 26, 1934 Patented Aug. 10, 1937 UNITED STAT-ES PATENT. OFFICE 2,089,773 on. SEAL Rudolph J. Vedovell, David B. Baker and Norman Ill.,v assigner: to Chicago Rawhide Manufacturing (Jompany,` Chicago,- Ill.. a corporation of Illinois v Appueauon November 26,1934, serial No. '154,750

4 claims.. (ci. 28an 'Ihe purpose ci this invention'ls to provide an improved sealing device of novel construction for use in closing oi the space present about a shaft between the end of a housing and some associated part which is capable of either end'- wise or sidewise movement relative to the hous- -ing.

Other more specific objects and advantages will be apparent to those skilled in the art` uponV a full understanding of the construction, arrangement and operation of the new seal.

Two different embodiments of the invention are presented herein for the purpose of exemplification, but it will of course be appreciated L that the invention is susceptible of embodiment in still other structurally modliied formsY coming equally within the scope of the appended ciaimsi.

In the accompanying drawing:

Iig. *1 is a diametric section through a seal constructed in accordance with the invention,

the section being taken through the seal on, the

.irregular line I-i of'Fig. 2;

Fig. 2 is a, partially broken away end Aview oi the seal shown in Fig. 1;

Fig. 3 is a diametrlc section thro-ugh a seal which embodies another form of the invention; Fig.- 4 isa partially sectioned fragnientaryend view of the seal shown in Fig. -3; and Y Fig. 5 is a fragmentaryl opposite end view of Y either the seal shownin Figs. l and e217 or'A the' seal shown in'Figs. 31and 4. n Y l.

The seal which'lsshown inFigs. 11and12 includes a sheet metal stamping lil t in the .form of a centrally apertur'ed cup. This jeun-*shapedv stamping is provided about-:theedgeof' the aperture therein with an Vinner. rim lVI-"jwhich procup. When so installed the cup, together' with the other hereinafterl described Vlttl'tsfilfthe seal, f are intended to close olf theopeningpresent-V about the shaft between'the end` of e the; housing.-

`l5 and some associated housing or shaft `part |1,"whichpart may have' some end"v play or vsidewise movement with respect'tothe housing, depending upon the nature of the paryticularj,assembly in which the seal is. used.A

of. the cup l0 inV the annular space` present between the inner and outer rimsl l l--and 'i3 there-v of, with' the plane ofrthezdiskparallelwith the bottom I2 of the cup. The disk'is maintained' `in concentric relation to the cup by. engagement with either theinner'rlm or the outer rim of the latter and is prevented from rotating with t respect vto the cup by means or projections I9 Lon the outer -edge of the'disk which ilt within axially extending notches 20 in the outer rimV of the cup.

A angedpacking ring 2| of leather or other suitable material ls secured to the inner face :of

Vthe disk i8, by means of rivets .22, and the ange 23 of the packing, which is positioned about the inner edge of the ring, is snugly sleeved over the inner 'rim Il of the cup' l0 in axially slidable but effectively sealed association with such rim.

The flange 23 oi' the packing ring is constricted v resiliently about the inner rim Il of. the cup by al tensioned garter 'spring 24 which ts about V,the ange 23 and is held in proper position by an inturned ange 25 on the inner edge of a thin sheet metal stamping 26, which stamping is clamped against the inner 'face 'of the packing ring 2l 'by the previously mentioned rivets 22.

'I'he disk i8 and the packing ring 2l are urged away from thebottom l2 ofthe cup I0 Aby a.

plurality of compressed coil springs 2l which are positioned at vregular intervals about the .seal in Vthe space present between the bottom i I2' of the cup and the opposed face of the springretaining' stamping 26. The springs 21 engage with the stamping l26 and are fastened thereto Inlthe vfully expanded position of the seal, the f disk i8 is prevented from moving out of the cup Vin -the edge of the outer rim I3 of the'cup and project Vinwardly into overlapped engagement the-edgeiof the outer rim- I3 of the cup.

g VFromthe foregoing description it willbe understoodV that the improved seal closes oi! the open- I1, in which position it is partially enclosed by f ingjabout'the. shaft which is present between the end of the housing'V l5 and the member l1 and K e Y i g serves toicompensat'e for any endwise or radial A metal disk I8 is positioned'ln the open end l0 by a. plurality of. studs 29 which are mounted movement of the member I'I relative to the housging without in any way disturbing the-effectiveness of zthe seal, the ilange 23 of the packing times by the spring 2d in snug'lysleeved'but readily slidable engagement with the innenrim Il oi' the cup I0, and the outside packing ring 30 being I maintained at all times in engagement with both 5 the end thrust disk i8 and the member l1 b the action of the pressure springs 2l.

This seal assembly, which can be inexpensively constructed and easily installed, will prevent oil or grease kfrom leaking out through the gap between the housing I5 and the member I'i and will at the same time prevent any foreign matter from f working its way in. K

rIn the modification whichis shown in Figs. 3 and 4, the iiange 3| of the inside packing ring l5 32, instead of being located about the inner edge of the ring in engagement with the inner rim 33 of the cup, is located about the outer edge of the ring in engagement with the outer rim 3d. The

. flange 3i of the packing ring is pressed against the rim 34 by an expansible spring metal ring 35 which contains a stepped split at 33. The spring ring 35 is heldin proper position relative to the ange 3| of the packing ring by anoutturned flange 31 on the outer edge of the stamping 38,

and the expansion springs 39 are secured to the stamping 38 by reversely bent anges 40 on the stamping, just as in the rst described lembodiment.-

As a further modification, the packing ring might be flanged about both its inner edge as shown in Fig. 1 and its outer edge as shown in Fig. 3, in a composite form of U-shaped radial section, with the inner flange pressed to form a sealed joint against the inner rim of the cup by any suitable spring means, such as the tensioned coil spring 24- of Fig. 1, and the outer flange pressed to form a second sealed joint against the Louter rim by any suitable spring means, such as the split expander ring 35 of Fig. 3, and with 40 both flange-engaging spring means held in'their proper positions by the oiiset formations on the inner and outer edges of the ring which is used to position the end-thrust springs.

. We claim:

l. In a seal of the character described, a. centrally apertured cup for pressed fit insertion in one end of a housing about a centrally located shaft, a centrally apertured end thrust disk which is positioned within the rim of the cup in axially spaced parallel relation to the bottom of the Y latter, a flanged packing ring which is secured to the inner face of the disk with the flange of the ring in snugly sleeved but slidable association .with a. portion .of the cup, spring means for pressing the iiange against the cup, spring means for moving the disk and packing ring away from the bottom of the cup without disturbingsuch sleeved association. and means on the cup for i limitingsaid movement.

\ 2. In a seal of the character described, a cen-- trally apertured cup for pressed fit insertion in one end of a housing about a centrally located shaft, which cup is flanged about such aperture to provide an inner rim in concentrically spaced relation to its outer rim, a centrally apertured end 5 thrust disk which is positioned between the inner and outer rims of the cup in axially spaced relation to the bottom of the latter, a flanged packing ring which is secured to the inner face oi the disk with the flange of the ring in snugly l0 sleeved but slidable association with the inner rim ofthe cup, spring means for pressing the flange against the cup, spring means for moving the disk and packing ring away from the bottom of the cup without disturbing such sleeved association, l5 means on the cup for limiting said movement.

`land a connection between the disk and the outer rim of the cu'pmfor preventing any relative rotation of the disk and cup without interfering with the movement of the disk toward or away from 20 the bottom of the cup.

3. In a seal of the character described, a centrally apertured sheet metal stamping provided *with a radially extending iiange and an axially extending flange, a centrally apertured end thrust 25 disk which is associated with the stamping in axially spaced parallel relation to thel radial flange thereof, 'a flanged packing ring which is positioned against the disk with the flange of the ring in snugly sleeved but slidable association 30 with the axial iiange of the stamping, spring means for pressing the flange of the packing ring against the axial ange of the stamping, spring means for moving the disk and packing ring away from the radial ange of the stamping without 35 disturbing such sleeved association, and means yon the stamping for limiting said movement.

4. In a seal of the character described, a centrally'apertured cup for pressed fit insertion in one end of a housing about a centrally located 4o shaft, a centrally apertured end thrust disk which is positioned within the rim of the cup. 'in axially spaced parallel relation to the bottom of the latter, a flanged packing ring which is secured` to the inner face of the disk with the flange of 45 the ring in snugly sleeved but slidable association with a portion of the cup, spring means for movf ing the disk and packing ring away from the bottom of the cup without disturbing such sleeved association, other spring means for pressing the 50 ange of the packing ring radially against the portion of the cup with which it is sleeved, and a spring-retaining member which is 'secured against the packing ring and is provided with means for positioning both said tlrst and second 55 mentioned spring' means. y

. RUDOLPH J. VEDOVELL.

DAVID B. BAKER. NORMIAN` O. PANZEGRAU. 60

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