US1737658A

US1737658A - Piston

Info

Publication number: US1737658A
Application number: US217719A
Authority: US
Inventors: Fred M Howe
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-09-06
Filing date: 1927-09-06
Publication date: 1929-12-03
Anticipated expiration: 1946-12-03

Description

10 cumulated oil Patented Dec. 3, 1929 arm u. now,

OF WELLSBORO, PENNSYLVANIA PISTON Application filed September 6, 1927. Serial No. 217,718.

This invention aims to provide a novel piston construction for an internal combustion engine, and, specifically, to improve the construction of the groove for the piston ring,

the groove being widened at its inner end or side to form a chamber for oil, novel means being provided for conducting oil into the chamber as the piston reciprocates, and novel means being supplied for conducting the acawa thereby preventing the oil from working into the combustion space of the internal combustion engine and fouling the engine with carbon.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combina tion and arrangement of parts and in the de-' talls of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed,may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings Figure 1 shows in longitudinal section, a portion of the cylinder of an internal combustion engine, and a portion of a piston wherein the device forming the subject mat ter of this application has been embodied;

Figure 2 is asection 0n the line 22 of Figure 1;

Figure 3 is a longitudinal sectionshowing a modification;

Figure 4 is a section on the line 4-4 of Figure 3;

Figure 5 is a sectioncut like Figures 1 and 3, but showing a modification.

As to the form depicted in Figures 1 and 2, there appears the cylinder 1 of an internal combustion engine, wherein the piston 2 is mounted for reciprocation. The piston 2 has a ring groove 3, and oppositely

slanting walls

4 and 5, the walls forming a widened chamber 6 at the inner side of the ring groove. A ring 7 of the usual expansion type, or of any desired construction, is mounted in the ring groove 3 and has contact with the wall of, the cylinder 1. The piston 2 has a transverse passage 8 of approximately semi-circular orm, the passage opening into the ring groove 3 and being located immediately adjacent to the ring 7 and on the crank case side thereof, that is, on that side of the piston ring which is remote from the combustion chamber of the internal combustion engine. The inner end of the passage 8 is in communication with the chamber 6, as the drawings clearly show. The piston 2 is cut away, by beveling, as at 9, at one corner of the ring groove 3, to collect oil and carry it into the passage 8. The piston 2 is supplied with an oil outlet for the chamher 6, the oil outlet being in the form of a bore 10 inclined with respect to the axis of reciprocation of the piston and discharging into the piston at the inner edge of the slanting wall 5. In practical operation, the oil which finds its way toward the combustion chamber, be tween the piston and the cylinder, moves over the beveled surface at 9 and is carried by the passage .8 into the chamber 6, and as the piston reciprocates, the surplus oil is shaken out through the outlet 10, much as a liquid can be shaken out of an inverted and uncorked bottle that is reciprocated vertically in the hand of an operator. The operation is such that the oil is disposed of before it has an opportunity to work past the ring 7 and into the combustion chamber of the engine. There may be as many of the passages 8, and as many of the outlets 10 as is considered expedient, the same being distributed circumferentially around the piston 2 in spaced relation.

In Figures 3 and 4, parts hereinbefore described have been designated by numerals previously used, with the sufiix a. The oil outlet is in the form of a slot 11 formed in the piston 2 and intersecting the base of the passage 8*}, there being an undercut supplemental groove 12 in the iston 2" at the outer end of the slot 11. T ere may be as many of the slots 11 as desired, and as many of the passages or recesses 8, and the groove '12 extends unbrokenly around the piston 2.

In Figure 5, parts hereinbefore described have been designated by numerals previously used, with the suffix b. The form under discussion is like the form shown in Figure 1, aside from the fact that the inclined wall 4 is done away with, and the beveling at 9 is replaced by a rectangular recess 14 which extends unbrokenly around the piston, like the beveling shown at 9.

What is claimed is 1. In a device of the class described, a piston having a ring groove and oppositely slanting wallsv forming a widened chamber at the inner side of the ring groove, a ring in the ring groove, the piston having a transverse passage of approximately semi-circular form, the passage opening into the ring groove and being located immediately adja cent to the ring, on the crank case side thereof, the inner end of the passage being in communication with the chamber, the piston being supplied with an oil outlet for the chamber.

2. In a device of the class described, a piston having a ring groove and oppositely slanting Walls forming a widened chamber at the inner side of the ring groove, 9. ring in the ring groove, the piston having a transverse passage of approximately semi-circular form, the passage opening into the ring groove and being located immediately adjacent to the ring, on the crank case side thereof, the inner end of the passage being in communication with the chamber, the piston being supplied with an oil outlet for the chamber, the oil outlet being in the form of a slot fashioned in the piston and intersecting the base of the passage.

3. In a device of the class described, a piston having a ring groove and oppositely slanting walls forming a widened chamber at the inner side of the ring groove, a ring in the ring groove, the piston having a trans--' verse passage, the passage opening into the ring groove and being located immediately adjacent to the ring, on the crank case side thereof, the inner end of the passage being in communication with the chamber, the piston 7 being supplied with an oil outlet for the chamber.

4;. In a device of the class described, a piston having a ring groove and oppositely slanting walls forming a widened chamber at the inner side of the ring groove, a ring in the ring groove, the piston having a transverse passage, the passage opening into the ring groove and being located immediately adjacent to the ring, on the crank case side thereof, the inner end of the passage being in communication with the chamber, the piston being. supplied with an oil outlet for the chamber, the oil outlet being in the form of a slot fashioned in the piston and intersecting the base of the passage.

In testimony that I claim the foregoing as niy own, I have hereto aflixed my signature.

FRED M. HOWE.