US1764146A

US1764146A - Ring tool

Info

Publication number: US1764146A
Application number: US191329A
Authority: US
Inventors: Harry M Bramberry
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-05-14
Filing date: 1927-05-14
Publication date: 1930-06-17
Anticipated expiration: 1947-06-17

Description

June 17, 1930. M BRAMBERRY 1,764,146

RING TOOL Filed May 14, 1927 v 3 Sheets-Sheet 1 I I v1v OR 13 Y Q/ ATTORNEY June 17, 1930. H. M. BRAMBERRY 1,764,145

RING TOOL Filed May 14. 1927 s Sheets-Sheet 2 June 17, 1930. H, M, BRAMBERRy 1,764,146

RING TOOL Filed May 14, 1927 s Sheets-Sheet 5 k Y b &

' m E "3 5 m "3 "q Q w Patented June 17, 1930 HARRY M. BRAMBERRY,

RING

Application filed May 14,

This invention relates to a ring tool for use in applying piston rings to the ring grooves of a plston and in reniovlng the rings Cir from the piston.

Piston rings are made with their inner diameters smaller than the outer diameter of the piston on which they are to be used in order that they may fit properly into the ring grooves. It is therefore necessary to expand the rings beyond their normal diameter in order to slip them over the piston and place them in the ring grooves. This is done in ordinary practice by merely spreading the ring laterally, so that the bending action is limited to a small section of the ring directly opposite the cut, and as a result the metal of this section is often stretched beyond its elastic limit and the ring is thereby permanently deformed.

In order to overcome these defects the present invention provides a form which is placedaround the ring and in which the ring is expanded into substantially circular shape. The tool therefore provides adefinite limit to the amount of expansion permitted, and insures that the bending will be distributed practically uniformly around the ring, thereby eliminating distortion.

Fig. 1 is a plan view of the tool being applied to remove a ring from a piston groove;

Fig. 2 is a view similar to Fig. 1 after the ring has been partly expanded;

Fig. 3 is a section on line 3-3 of Fig. 1;

Fig. 4 is a fragmentary view similar to Fig. 1 showing the ring fully expanded, parts being broken away; and

Fig. 5 is a fragmentary perspective showing details of construction. J

Fig. 6 is a plan View partly in section of a ring tool for expanding a complete set of rings at one operation.

Fig. 7 is a section on line 77 of Figure 6 Fig. 8 is a section on line 8-8 of Figure 6.

Fig. 9 is a section on line .99 of Figure 7.

Referring to the drawings more specifically, the tool is composed chiefly of the grooved collar 10 and the two operating le-' vers 11. The main part 12 of each operating lever is semi-circular in shape and 1s of a thickness permitting it to fit slidably w.1th1n ?PATENT' oF'FIcE 1927. Serial No. 191,329.

a groove 13 formed in the outer face of the collar 10. The lower endof the semi-circular part 12 carries a projecting handle 14 and is formed with a slot 15 just above the base of the handle. A rivet or set screw 16 passes through the slot 15 and is stationarily secured to collar 10. j i

The upper end of the part -12 is provided with a finger 17 adapted to extend inwardly through a slot 18 formed in the bottom of the groove 13. An outwardly projecting ear 19 is formed on the upper end of the part 12, and a tension spring 20 is secured to each of the ears 19 and holds the operating le-Y vers in the position shown in Fig. 1 with the fingers 17 in contact, with the handles 14 separated. The face of each finger directly opposite the other finger is the operating face, and these operating faces are formed at an angle to each other, so that they are closer together at their roots than at their free ends.

The lower part of the collar 10 carries an inwardly projecting flange 21 upon which the ring is adapted to lie.

A notch 22 is formed in the upper rim of V the collarlO at a point between the handles to permit insertion of a finger to lift the ring into engagement with the fingers 17 when removing the ring froma piston.

Fig. 1 illustrates the use of a tool in removing a ring from a piston. The tool is placed over the piston in the position shown, andsince the fingers 17 lie outside the piston diameter, it is necessary to insert a finger into notch 22 and lift the ring until the fingers 17 extend into the gap of the ring as shown in Fig. 1. Pressure is then applied to handles 14, thereby spreading the fingers 17 and expanding the ring to the position illustrated in Fig. 2. In this position the major portion of the ring is in contact with the inner circular wall of the collar10, but the extreme ends of the ring are still curved inwardly away from the collar. With the application of slight. additional pressure upon the handles the ends of the ring are forcedto ride up the inclined faces of the fingers 17 andthe ring is forced into contact with the collar as indicated in Fig.4. The

ton.

vice for handling a single ring, as duplicate.

ring is now free of the slipped over the piston.

. It will be obvious that the operations are merely reversed in placing a ring on the pis- The invention is not limited to a degroove and may. he

sets of operating levers may be provided and operated simultaneously ito'remove or a 1 apply a lurality of rings.

By expanding the ring into contactvvit'h' a circular, or substantially circulan form the 7 amount of bending given the ring is reduced to a minimum and is evenly distributed around the ring, while the form provides a positive stop'and prevents careless workmen from opening the ring beyond the-necessary minimum V Y In the species of. Figs. 6-9, the ring tool comprises a 'cylindrical form,the upper part with the ring grooves of the

piston

31 and 25 of whichishinge'd at 26 to the lower half" 27.] Near its forward end the lower half 27 "iscu't away to form a groove 28, and a semi-circular guide-piece 29 is fitted into the, groove. The'innerface of the guide-piece is formed with grooves 30 arranged to mate the hinged section 25 carries similar grooves 32." I The pair'of expanding'members 33 are mounted between-the guide-piece '29 and the groove 28 and are'ada'pted to be spread apart cireumferentially to expand the rings. For this purpose they carry fingers 34 projecting j" inwardly through the slots 35 formed. in the bottom of each ring groove '30fand have portions-36'arranged to .slid'ein lguideways 37 formed in the guide piece 29$ An operating I ear 38- 'extends downwardly". from each expending member 33' and a cam wedge; 39 is mountedin' t-he base 27 and adapted; to'slide' between the ears 38. ;Theforward part of cam-39fcarries a narrow flat'portion lO'thatremains. between the ears '88 at all times and the members 33ijin expanding position.

I actsfias astop to holdthe ears in'neutra'l posi- 7 tion, while the wide part of the cam is formed with'fla'ts '41 tli'atfact as stops to hold Handle 42 provides means for operating the cam. 39."- Spring- 'pressed- "pl'unger's ,43- are mounted'in the. base" 27 transversely of its axisand engage the ears 38 ,to' normally press themtoward each other;

A "transverse bar 44 extends across the front-endof' the base 27 and an adjustable stop screw .t5' provides means foraccurately positioningthe'piston in the holder."

The'hinged section 25isjprovided with an and locked and the wedge 39 is moved to spreadthe ears 38 and expand the rings into the form. A piston is then inserted in the form to the position of Fig. 7, and upon releasing the'wedge, the rings will be per-f grooves of the mitted to seat in the ring piston. V

Iclaim': p 1. A ring tool comprising a grooved'collar 'adaptedto surround a split ring, a pair of operatingleversmounted'ln the groove of the collar, each lever having an outwardly, projecting handle and an inwardly extending finger adapted toeXtend into the gap of the 2. A ring tool comprising a collar, there being a slot foi'med'radially through'the wall of the collar and an operating lever mounted for sliding movement about the-collar; said;

lever having a 7 part projecting inwardly through the slot.

7 3. A ring tool comprising a'collar, adaptedf to surround a split ring, afingerprojecting} inwardly from the collar and adapted to en gage one end or the rlng, a second finger projecting inwardly from the collar and adapted to engage the other end of the ringrmeans for.

moving the second finger away from the first finger toth'ereby expand the ring into contact.

. with the collar, and resilient means normally" pressing the fingers toward each other.

4. A ring tool comprising a collar, there being a slot formed radially through the wall of the collar, a groove formed in the outer wall of the collar, a pair of operating levers mounted for sliding movement in the groove, ahandle formed on each operating lever, and

a finger formed on each operating lever and V projecting inwardly through the slot.

7 5. A ring tool'comprising a collar, there being a slot formed radially through the wall ofthe collar, a groove formed in the outer f wall of the collar a flange extending'inw'ardly through the lower edge of the collar, a pair of operating levers mounted for sliding movement in the groove, a handle formed" on each operating lever, a finger formed on each operating lever and projecting inwardly through the slot, an ear projecting outwardly from each of the operating levers, a' spring;

having its opposite ends attached toeach ear,

and there being a notch'formed side of the collar. g i H 6. A ring toolzconiprisinga collaradapted' to surround a split ring, a fi'n ger projecting. inwardly from the collar andadapted to engage one end ofthe ringja second fingerpro jecting inwardly from the collar and adapted to engage the jotherend-of the ring, the face 1 of each finger which, engages the ring being tool is in its initial operating position:

- 7; A ringtoolcomprisinga body of a hol low cylindricalform' adapted to receive a 130 plurality of piston rings a single me ans operin the upper I inclined away fromthe other-finger when'tlie 3 p i able to expand the rings simultaneously into contact with the body, and means for locating a piston within said body.

8. A ring tool comprising a rigid collar adapted to surround a split ring, a finger pro jecting inwardly from the collar and adapted to engage one end of the ring, a second finger projecting inwardly from the collar and adapted to engage the other end of the ring, a handle extending outwardly from the collar, said handle being secured in fixed relation to the first finger, and a second handle extending outwardly fromthe collar and connected to the second finger, the parts being so arranged that when the two handles are pressed together the fingers are separated to expand the ring into contact with the collar.

9. A ring tool comprising a rigid collar adapted to surround a split ring, a finger projecting inwardly from the collar and adapted to engage one end of the ring, a second finger projecting inwardly from the collar and adapted to engage the other end of the ring, a handle extending outwardly from the collar, said handle being secured in fixed relation to the first finger, and a second handle extending outwardly from the collar and connected to the second finger, a spring member normally pressing the fingers toward each other, the parts being so arranged that when the two handles are pressed together the fingers are separated to expand the ring into contact with the collar.

10. A ring tool comprising a rigid collar adapted to surround a split ring, a pair of semi-circular members adapted to slide about the collar, each of the semi-circular members carrying at one end a handle and at the opposite end a finger adapted to extend within the collar to engage a split ring, and a resilient member normally pressing the fingers toward each other, the handles lying in close proximity to each other so that theoperator can compress them with one hand to expand the ring into contact with the collar.

11. A ring tool comprising a rigid collar adapted to surround a split ring, a pair of fingers adapted to extend within the collar to engage the ends of the ring, means to separate the fingers to expand the ring into contact with the collar, the collar having a portion cut away at a point opposite the fingers to permit the operator to move the ring into engagement with the fingers.

In testimony whereof I aflix my signature.

HARRY M. BRAMBERRY.