US1623710A - Piston ring - Google Patents

Description

April 1927' D. c. TEETOR PISTON RING Filed Feb.

- In carr ing out my invention, I

' Patented Apr. 5,

" 1 UNI-TED STATES 1,623,110 PATENT OFFICE. 7

' name; .0. matron, or TIPTQF, momma.

PISTON RING.

'Application filed Fehrnary 25, 1926. Serial No. 90,560.

two para lel series of contiguous c annels that are elongated'and distrlbuted circumferentially of and pass through thering, thechannels of etch set being in staggered 5 relation to the channels of the other, one

I end wall of each channel of each set converging toward the other end wallof such channe and crossin an end wall of a con ti one channel in e other set.

' the preferred embodiment of the inventioli, the channels of each series are disconnected in the ring itself although lubri "cant may flow between the channels of both and each series in the actual use of the rin the lubricant flowing between the channe throu h the space between the ring and the cylin er and through the space between the ring and piston. In the ring of my invention, the volume of lubricant conducting space passing therethrough is increased without weakening'the ring integral bridge por=- tions of the ring at the inner cfylindrical side thereof extending widthwise o the ring from flat faceto fiat face. Both end walls of each channel of one set desirably cross the adj acentend wall of two contiguous channels in the other set whereb suchtan' integral bridge 4 portion is provided. etween each of the two contiguous ends of adjacent channels-in; the

40 two series, a construction which renders the ring substantiallyi-nflexible widthwise, especially at its inner c lindrical side.

' The invention will more fully explained in connection with the accompanying drawing in which'Fig. 1 is a view partially in section and partially-in elevation. illustrating a ring of my invention, a piston furnished with the ring and a cylinder in which the piston reciprocates; Fig.2 is a sectional view on line 2-2 of Fig. 1'; Fig. 3 is a sectional view on line 3-3 of Fig. 4; Fig, 4 is a view of-a part of the structure appearing in Fig. 2, but on a larger scale; and Fig. 5 is a perspective View of a part of the ring with portions shown in section.

My invention is of particular service in connection with internal combustion hydrovcarbon engines, though the'invention is not to be thus restricted.

The engine cylinder 1 ma be of any suitable type, the engine cylind er "usually communicating at its inner end with a crank case containing a 'bath of lubricating oil from whichworking parts of the engine are sup-' d plied. The piston 2 is of any-suitable or rov1 ev usual form, having one or more annular piston ring firooves 3, 4 that receive piston rings 5, 6. e piston tring groove 4 is nearest the crank case and this groove contains a piston ring'of my invention, it being unnecessary to provide such a 'piston ring in-the other piston ring grooves'of the piston. I The innermost piston ring 6 is formed witlf two parallel. series of contiguous channels, channels 7 being included in one series and channels8 in the other. These channels are elonated circumferentially of the ring and are istributed circumferentially of the ring 'andextend from the inner cylindrical side of the rin to the outer cylindrical side thereof, where y" passages for lubricant are af- -forded through the ring to conve lubricant between its outer and inner cylin rical side's.

The channels of-each set are in staggered relation tovthe channels ofthe other and the end walls of each channel of one set conver e inwardly and cross the adjacent end wa s oftwocontiguous channels in-the other set. Integral bridge portions 9, extendingwidthwise of the ring, are left upon the inner side of the ring and each between the conti ous ends of two'contiguous channels ins e two series, the ring'thus being .sufliciently solid and massive at its inner side to be there inflexible. Tapering bridge portions 10 are also left, these tapering .bridge port-ionsinterveningbetween the contiguous channels in each series. ,The bridge portions 10 between the channels of each series preferably terminate atthe outer cyof the close endwise proximity-of the channels in eachseries, no passages are required in the exterior cylindrical side of the ring to bring the channels into communication, there being suflicient outward and circumferential flow of lubricant at the ends of the channels to properly lubricate the exterior ring surface portions between the ad'acent channels of each series. The channe define inwardly conver 'ng spaces inwhich taperin these lu ricant bodies being constantly replenished by lubricant flowing into the channels that is caught from the inner surface of ,the cylinder to 'replace the lubricant which flows through the reduced inner ends ofth e channels at the interior of the ring, the channels, by virtue of their shape, sufliciently retarding the inward flow of the lubricant to permit it to properly erform its function. The outer or apex end of the bridge portions. 10 serve to cut through the lubricant oroil film with ease to promote the flowof the lubricant, between thechannels of each series and over 'theiunchan bodies of In ricant are contained,-

neled portions of the outer cylindrical side of the ring. The tool employed for formmg the channels is desirably a milling tool in the form of a disc wheel having suitable cutting teeth uponits periphery and of a diameter to produce the desired converging of the end walls of the channels.

Having thus described my invention, I claim:

A piston ring having two parallel series of contiguous and disconnected channels that are elongated and distributed circumferentially of and pass through the ring, the'channels of each ,set being in staggered relation to the channels of the other, the end walls of each channel of one set converging inwardly and crossing the adjacent end'iwalls of two contiguous channels in the other set, thereby to provide a pluralit of spaced solid bridge portions extending rom end to end of the ring parallel to the axis of the latter.

In witness whereof, I hereunto subscribe my name.

--DANIEL o. TEETOR.

Images