US1544180A - Piston ring - Google Patents

Description

June 30, 1925. 1,544.18()

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RALPH E. REITER, OF AKRON, OHIO.

rrs'roN RING.

Application :filed December 2, 1920. Serial No. 427,794.

To all whom 'it may conce/rn:

Be it known that l, RALPH H. REITER, a citizenY ofthe United States, residing at Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Piston Rings, of which the following is a specification.

This invention relates to improvements in metallic packing rings and has particular reference to a new and improved piston ring which may be used to advantage in explosive engines, on the pistons of pumps and, 1 n general, on devices wherein a tight joint 1s necessary between a piston and a cylinder wall.

It is well known that a piston tted with new rings will provide a tight joint between the piston and the cylinder wall only after a period of use and that an engine must be operated for some time with a considerable loss of compression before the rings are properly seated.

The main object of this invention is to provide a quick seating packing ring which in use will quickly adapt itself to Slight irregularities in a cylinder wall.

A further object is to provide a strong durable one-piece ring of simple construction which will edectually seal the joint between the piston and the cylinder wall.

The above and other objects are accomplished by the novel construction, hereinafter described and illustrated in the accompanying drawings in which I have shown a preferred embodiment of the invention, it being understood that the invention is capable of various adaptations and that changes and modifications may be re- Sorted to which come within the scope of the claim hereunto appended.

In the drawings in which similar numerals of reference are employed to designate corresponding parts throughout the severall views,

Figure 1 is a perspective view of a piston ring constructed in accordance with this invention.

Figure 2 is a side view of same.

Figure 3 is an enlarged perspective view of a portion of the ring shown in Figures 1 and 2.

Figure 4 is a transverse sectional view taken as indicated by the lines 4:-4 of Figure 1.

.Referring now to the drawings in detail, the numeral 5 is used to denote the ring body which, in the main, is of the usual rectangular cross section. The peripheral-face of the ring is provided, adjacent each edge, with a plurality of longitudinally directed, circumferentially extending ridges 7, which are of triangle cross section, disposed thereon base to base, so as to project outwardly from the central peripheral portions 6 of the ring. '.lhe ridges 7 are preferably minute, projectlng only about .O02 of an inch beyond the central circumferential surface 6 of the ring body 5; the size of said ridges 7 being greatly exaggerated in the drawing, to more clearly illustrate the invention. The ring 5 is cut as at 8 and is provided with abutting ends 9 and 10. The cut 8 extends vertically upward from the bottom of the ring body 5 to a point approximately central of the smooth surface 6, from which point it extends at a right angle to the said vertical out and parallel to the ridges 7. The cut is then directed at an acute angle to the last mentioned cut terminating'at a point in alinement with the 'lower or vertical part of the cut 8. This provides an oblique cut 12 through the upper part of the ring body 5 and a step cut 11 through the lower part of the ring body 5, thus providing a reliable and eifective juncture between the ends 12- and 13.

In use, a ring constructed in accordance with this invention is placed on a piston in the ordinary manner and the piston is operrated in the usual way in a cylinder. Inasmuch as each rib 7 presents a narrow surface to the cylinder wall, the said ridges quickly wear down in conformity with the contour of the cylinder and the engine need be operated only a short period of time until the .ring has adapted itself to every irregularity that may exist in the cylinder walls.

While I have shown and described a rin provided with a wearing face rovided wit a ridged area adjacent each e ge thereof, it is to be understood that a ring may be constructed with any desired number of pr"- jecting rid ed areas.

Having t us described my invention what I claim as new and desire to secure by Letters Patent is In a piston ring, a ring body provided on its peripheral face adjacent each edge thereof with a set of parallel outwardly projecting, longitudinally, directed circumferen- 'ti'ally extending ridges of triangular cross section, disposed thereon base to base, said sets of ridges spaced apart to provide a centrally disposed eircumferentially extending smooth, substantially cylindrical area of the same diameter as the base of said ridges, the outer face of each outermost ridge meeting 10 the axial face of the ring and disposed at an angle thereto. l In testimony whereof I have hereunto set

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