US2670254A

US2670254A - Piston skirt stabilizer

Info

Publication number: US2670254A
Application number: US187790A
Authority: US
Inventors: Melvin W Marien
Original assignee: Ramsey Corp
Current assignee: Ramsey Corp
Priority date: 1950-09-30
Filing date: 1950-09-30
Publication date: 1954-02-23
Anticipated expiration: 1971-02-23

Description

Feb. 23, 1954 M. w. MARIEN 2,670,254

PISTONV sKRT STABILIZER Filed Sept. 30, 1950 IIIIIIIIIIA ,o 34 zz z3 INVENTOR.

ATTORNEY.

MELLVIN W. MARIEN Patented Feb. 23, 1954 PISTON SKIRT STABILIZER Melvin W. Marien, Richmond Heights, Mo., as-

signor to Ramsey Corporation, St. Louis, Mo., a corporation of Delaware Application September 30, 1950, Serial No. 187,790

8 Claims.

My invention has relation to improvements in piston skirt stabilizers (sometimes -called piston skirt expanders) and it consists in the novel features of construction more fully set forth in the specication and pointed out in the claims.

Piston skirt stabilizers (or expanders) have generally been used heretofore for the rehabilitation of worn engines in order to overcome excessive clearance between the piston and the cylinder due to wear. The present invention is concerned more particularly with stabilizers to be initially inserted in the pistons so as to prevent any ycollapse of the piston skirt and compensate for wear between the piston and cylinder as it occurs. mounted within the piston skirt so as not to become displaced during the operation thereof and at the same time should be of a construction that will permit easy and quick application.

These advantages, together with others inherent in the invention, will be better -apparent from a detailed description of the invention in connection with the accompanying drawings, in which:

Fig. 1 is a combined side elevation and middle longitudinal section of a typical piston showing my improved stabilizer mounted therein; Fig. 2 is a bottom plan of the lpiston showing the stabilizer in place; Fig. 3 is a vertical longitudinal section taken on a plane indicated by the line 3--3 in Fig. l; Fig. 4 is a cross-sectional detail through my improved stabilizer taken on the line 4--4 in Fig. 1; Fig. 5 is a fragmentary view of the piston skirt showing one of the bosses between which the stabilizer is mounted; Fig. 6 is a section similar to that shown in Fig. 4, but of a modified form of construction; Fig. 7 is a side elevation of the modification shown in Fig. 6 contracted prior to insertion Within the piston skirt; Fig. 8 is a cross section of a further modied form of the invention; Fig. 9 is a side elevation of the modification shown in Fig. 8; and Fig. 10 is a still further modified form of the invention shown in longitudinal section.

Referring to the drawings, P represents a niston connected to a connecting rod R, (dotted in Figs. 1 to 3 inclusive) by a Wrist pin W. There are a pair of my improved stabilizers (or expanders) E, E inserted within the piston skirt S for the purpose of exerting pressure thereon in a di rection at right angles to the axis of the wrist pin. This is the direction of the thrust during the operation of the lpiston and if the latter is to collapse it will do so in this plane. The use of a stabilizer (or expander) to prevent piston collapse is not new. However, the stabilizer form- `Obviously the stabilizer must be securely 4 ing the subject of the present invention is to my knowledge novel both in its general construction and in the manner of its application to the piston. 'Since each stabilizer E of the pair is identical, only one will be described.

It will be noted that there are two pairs of bosses I, I disposed in opposing relation within the piston skirt S and spaced suiiciently so :that when the expanders E, E are mounted between opposing bosses they will straddle the connecting rod R (Fig. 3).

Each of the bosses I, I is provided with a socket 2, in which socket vthe expander E is mounted in the following manner: The expander E comprises a tube 3 provided with threads 4 at one end of which is passed an adjusting nut 5. Disposed within the threaded end of the tube 3 is a cylindrical plug 5 terminating in a flange l from which extends a pin 8. The pin 8 is lodged in one of the sockets 2. A second plug 9 is disposed in the opposite end of the tube 3, said plug also having a ange I0 and a pin II which fits in socket 2. There is a coiled spring I2 disposed over the tube 3 and conned between flange I0 and adjusting nut 5 so as to exert tension expansively against the plug 6 and plug 9. By adjusting the position of the nut '5 the tension on spring I2 may be varied either to exert greater pressure on the piston skirt or lesser pressure as the requirements demand.

`It is apparent from the foregoing that consid-y to the necessary degree thereafter.

In Figs. 6 and 7 I show a somewhat modied form of invention in which three Cylinders I5, It, and Il are arranged in telescopic relation, the terminal cylinders IS and I'I having openings I8 and I9 formed in their extremities so as to receive the bosses 2li and '2l within the piston skirt S'. The inner margins of the cylinders I6 and i? are swaged over as indicated at 22 and '23 so that they may be held together by hooks 24 to overcome the tension of spring 25 prior to the insertion of expanders in the piston skirt lS. Of course, after the expanders have been inserted in position the hooks 2t may be snipped so as to permit the spring 25 to expand the cylinders I6 and I'I against opposite surfaces of the skirt S.

In Fig. 8 I show a modification wherein two identical cylinders 25, 26, having their inner ends closed and their outer ends open to receive bosses 21, 2'! formed in the piston skirt S, are connected by a nut 28. Obviously the

cylinders

26, 26 are provided with right and left hand threads and the nut is similarly threaded so as to operate as a turnbuckle. In the modincation shown in Fig. lthere are but two

cylinders

30, 3| telescopically arranged, the outer cylinder Si! having

slots

32, 32 formed in it. The purpose of the slots is to permit pins 33, 33 fixed in cylinder 3| to project upwardly for cooperation with

lugs

34, 34 formed on cylinder 30, wherebythe cylinders may be contracted to permit of easyuinsertion within the piston skirt S".' I

It should be readily apparent that the invention is readily susceptible of many modifications, and I do not wish to be restricted to any of the specic forms herein shown.

Having described my invention, I claim:

l. A piston stabilizer comprising a pair ci tubular housings.' a third tubular member in tele scopic relation therewith, al Vcoiled spring disposed within the'assembled housings and suitable forn'iations on inner extremities ci said pair of housings to receive, a tool whereby said housings may be contracted over the pressure ci said spring.

2.,A A piston stabilizer comprising telescopically arranged tubular members, a coiled spring disposed within said tubular members and tool receiving elements projecting from the periphery of said members whereby they may be compressed over the tension of said springs.

3. A self-contained piston stabilizer comprising a capsule having extensible and contractible end portions, end faces on `said end portions shaped and sized for engagement with piston retainers to hold the capsule in spanning relation across the skirt of a piston, spring means in said capsule urging said end portions out- Wardly for causing said end faces to `exert an expanding force on the piston skirt, peripheral protuberances on the end portions, and means coacting with said protuberances for retaining the end portions in assembled capsule forming relation` 4. A piston stabilizer to be mounted within and transversely cf the skirt of the piston to expand the piston skirt comprising teleseopingly arranged members with end portions arranged i ranged members and retained so arranged by i means forming part of theend portions of said members and end portions of said coil spring.

contacting only said last mentioned means.

5. A piston stabilizer to be mounted within and transversely of the skirt of the piston to expand said skirt comprising telescopingly arranged members with outer end portions arranged and `disposed to associate and cooperate with stabilizer retaining portions on said piston skirt, a coil spring concentrically and telescopingly arranged within said telescopingly arranged members and retained and so positioned by means forming part of the said outer end portions of the members, the ends of said coil spring contacting only said last mentioned means, and tool receiving means on the periphery of said a members whereby they may be compressed over the tension of said spring.

6. A piston stabilizer to be mounted within and transversely of the skirt of the piston to expand the said skirt comprising a pair of telescopingly arranged members with swedged-in outer end portions arranged and disposed to associate and cooperate with stabilizer retaining portions on said piston skirts, a coil spring concentrically and telescopingly arranged within said pair of telescopingly arranged members and retained and so positioned by said swedged-in outer end portion of said members, the ends of said coil spring contacting only said sWedged-in outer end portion, and tool receiving elements projecting from the periphery of said members whereby they may be compressed over the tension of said spring.

'7.v A piston stabilizer to be mounted within and transversely of the skirt of the piston to expand the said skirt comprising a pair of telescopingly arranged members with swedged-in outer end portions arranged and disposed to associate and cooperate with stabilizer retaining portions on said piston skirt, a third member telescopingly arranged and disposed Within said pair of members, said pair of members and said third member forming a housing containing a coil spring ooncentrically and telescopinglyarranged therewithin and retained so positioned by said swedged-in end portions of said pair of members, the ends of said coil springs contacting only said swedged-in end portions and suit'- able formations on the inner extremities of said housing to receive a tool whereby said housing may be contracted over the pressure of said spring.

8. A piston stabilizer to be mounted within and transversely of the skirt of the piston to expand the said skirt comprising a pair of telescopingly arranged members with swedged-in outer` end portions arranged and disposed to associateV and cooperate with stabilizer retaining portionson said piston skirts, a third member telescopingly arranged within said pair of members, said pair of members on said thirdmember forming a housing including therewithin a coil spring con,` centrically and telescopingly associated 'therewith, said coil spring retained so associated and positioned by said swedgedfin outer end portions of said pair of members, the ends of said coil spring contacting only said swedged-inouter end portions, said pair of members having swedgedout inner extremities receiving hooks retaining the parts of the housing and stabilizer in 4proper association and in capsule form against the tension of the spring.

MELVIN W. MARIEN.

References Cited in the file of this patent UNITED STATES PATENTS .Great Britain Mar.` 26, 1925 1... a sin