US1698073A - Device for reducing piston slap in internal-combustion engines - Google Patents

Description

Jan, 8, 1929.

D. M. SOLENBERGER DEVICE FOR REDUCING PISTON SLAP IN INTERNAL COMBUSTION ENGINES Original Filed March 1926 avwzulo'a 647? N 5026771 676)" Patented Jan. 8, 1929.

UNITED DEAN M. SOLENBERGER, OF CLEVELAND, OHIO, ASSIGNOR TO THE SIMPLEX PISTON RING COMPANY OF AMERICA, INC., A CORPORATION OF OHIO.

DEVICE FOR REDUCING PISTON SLAP IN INTERNAL-COMBUSTION ENGINES.

Original application filed March 1, 1926, Serial No. 91,601, new Patent No. 1,662,544, dated March 13, 1928. Divided and this application filed September 26, 1927. Serial No. 222,094.

The. invention relates to devices for preventing piston slap in internal combustion engines and forms subject matter of my former application a divisional of .part of the Ser.

No. 91,601, filed March 1, 1926. In this earlier application a. numberof different specific constructions were shown all including aradial- 1y expansible piston ring in a groove in the piston together with means for exerting a preponderance of'radial pressure between the ring and one side of the piston whereby said piston is held in closer contact with the opposite side of the cylinder.

The present invention is a construction of this general character in which the piston is provided with an eccentric groove being of greater depth on one side than the other and the invention consists in the novel construe tion and combination of parts as hereinafter se tforth.

In the drawings; I Figure 1 is a horizontal section through an engine cylinder and piston constructed in accordance with my invention.

I Figure 2 is a vertical section therethrough. In the present state of the art piston rings are frequently provided with expanders located between the inner face of the ring and the bottom of the ring groove to increase the radial pressure and to distribute the same about the axis of the cylinder. Such a. construction will not always prevent piston slap as the radial pressures on opposite sides are in exact balance and therefore may not: under some conditions overcome the alternately oposite angular thrust of the connecting rod. f, however, the clearance between the inner face of the ring and the bottom of the ring groove is greater on one side of the piston than the diametrically opposite side this will cause a preponderance of resilient pressure in the shallow will tend to hol cylinder.

ort-ion of the groove which the piston to one wall of the To produce the construction just described all that is necessary is to deepen the groove on one side of the piston which may be practically accomplished by the use of a suitable grooving tool. The same or similar piston rings and reinforcingexpanders are then inserted in the groove with the result that a differential radial pressure is applied to di ametrically opposite sides of the ring. This, as previously stated, will cause the piston to travel in closer contact with the cylinder wall on the low pressure side and will thereby lessen piston sla In detail A is the piston having the eccentric groove B therein having the greatest depth at the point C and the least depth at the diametrically opposite point C. B is a transsplit piston ring located in said groove and E is a corrugated ribbon expanderinscrted between the inner face of the ring and the bottom of the groove. By properly selecting the expander E any desired differential pressure may be placed upon the piston;

What I claim as my invention is:

1. The combination with a cylinder. of a piston loosely fitting the same provided with a ring groove of greater depth on one side of said piston than upon the diametrically opposite side, a. trans-split ring engaging said groove and a corrugated ribbon expander located between the inner face of the ring and the bottom of the groove,

2. The combination with a cylinder, of a piston loosely fitting the same provided with an eccentric ring groove having the greater depth on one side of the piston than upon the diametrically oppositeside, a trans-split ring ofuniform radial depth engaging said groove and a uniformly corrugated ribbon expander located bet-ween the inner face of the ring and the bottom of the ring groove.

In testimony whereof I aifix my signature.

DEAN M. SOLENBERGE-R.

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