US1521220A - Internal-combustion engine - Google Patents

Description

Dec', 30, 19.24.. 1,521,220.

.E. H. FRIEND ET AL INTRNAL coMBusTroN ENGINE Filed April 12, 1924 /IIf Patented Bec. 30, 1924,

inn s l itt El tl EDWARD HENRY EEiENn, or xaTooMEn, NEW soUTn wenns, AND ALBERT GILEAD BENTLEY, or MELBoUENE, VICTORIA, .nusTnnLri-i, Assi-encres To THE FRIEND BENTLEY ELEMENTS coiurANY LIMITED. or isrELnojoza-NE, AUsTRALTA.

INTERNAL-COMBUSTEON ENGINE.

Application filed April 12, 1324. Serial No. 7065202.

To all whom t may concern.' v

Be it known that we, Enwiinn HENRY FRIEND and ALBERT GILEAD BENTLEY, both subjects of the liling` et Great Britainl residing, respectively, at liatcomba, nlew South l/Vales, Australia, and Reddam House, 409 Lonsdale Street, Melbourne, Victoria, Australia, have invented certain new and useiul improvements in or Relating to lnternal-Combustiou Engines, o1' which the following is a specilication.

This invention relates to internal conibus tion engines of the type in which theworin ing piston operates in conjunction withan abutment of fixed piston type extending into a sleeve on the working piston.

@ne objectief the invention is to provide u simplied and more efficient construction ot' engine in which the working stroke exerts pulling action on the connecting' rod so as to eliminate bending stresses. Another object is to improve the cooling ot' the abutment and the working piston. A. further object is to facilitate the ritt-ing of the abutment, piston and connecting rod and the assembling of the parts, A still -further object is to improve the supply ot the charge and the exhaust oit the products ot combustion.

The accompanying drawings illustrate one embodiment of the invention Figures l and 2 are, respectively, a vertical section and an inverted sectional plan ot the said embodiment.

A is the engine cylinder. B the moving piston with sleeve t upon or into the upper end of which the flange of the piston is screwed. C is the fixed abutment or stationar,7 piston carried by the limbs or supports c bolted at c1 to the cylinder through spacing; members' C* near the lower end. D is the connecting rod.

The piston or piston head B is screwed into the outer end of the piston sleeve o through the flange b1 provided with piston rings o2. At the lower end of the piston sleeve are the exhaust ports 5S adapted at the end of the outer piston stroke to regis` ter with the exhaust channel c1 of the cylnder. 1l `or lubrication a lubricating oil pipe G is shown as iitted at the top of the cylinder so that the oil can drop upon the outer face of the piston.

A pump compression space H is provided between the piston head and the top ot' vthe interior of the pistou, so that the charge compressed in the pump space l-l is more than suiiicient to fill the working space at the end ot' the working stroke when the products of combustion escape through the exhaust ports o8 and the compressed charge trom the pump space H enters through the ports 2,, driving' the products of combustion in front ot' it. The grudgeon pin ci, to which the upper end ot the connecting` rod (Z is attached7 is carried by a pair of bearing` brackets o5 integral with the piston extensions o which project downwardly on each side between the limbs c ot the abutment. Between the limbs (the outer faces of which are concentric with the cylinder) and the cylinder wall an annular space is left within which slides the piston sleeve o. The gudgeon pin d extends diametrically between the two limbs c.

The inlet channel itl leads from a carburetter and supplies the explosive mixture to the pumpspace H in the head ol' the cylinder. The cylinder inlet ports (1,2 are placed immediately above the abutment C1 at one side and the exhaust al is at the opposite side, the piston being provided with inlet and exhaust ports 712 228 at the opposite sides of the sleeve. The charge is admitted to the working space through the inlet channel 7a2 leading from the pump space l-l along the side of the cylinder and the abutment is provided with a deflector c3 to direct lthe iniiowinp; gases upwardly to drive the prod ucts of combustion out through the exhaust ports. i

The abutment C1 is shown with a water cooling space c4 and the cooling water is admitted and discharged through the channels @5in the limbs c.

What we claim and desire to secure by Letters Patent of the United States is tl. In .an internal combustion engine, a

'eylinden a sleeved reciprocating piston in f the said eylindei, a hollow abutment of fixed piston type extending into the piston sleeve', limbs earryingtl're said abutment and extending towards the lower end of the cylinder, which limbs are provided with watei` channels for supply of Cooling water to the bollo-w alnitment7 Spacing members between the said limbs at their loweil end and tbe cylinder and means for bolting tbe Said eylifnder, whereby the limbs provide a cleal space between them and tbe inner surface o the cylinder for the imssagge of the piston sleeve. v f

2. ln an intern-al1 coniibnstion engine, a cyl-indem a sleeved reciprocating pist-Ion in the said cylinder, an abutment of xed piston type extending into the piston sleeve, li'mibs @ari-ying the. Saiel abutment, and extending towards the lower end of the cylinder, a space for `tlne piston sleeve being; left between the' limbs and the cylinder, a connecting` rod, a niclgeon' pin lying between tbe abutment limbs and a pair of brackets. pirofi-eeting inwardly from the pis' ton sleeve between the. two abutment limbs to' enmity the said gndgeon pin.

3. ln an internal combustion engine as in claim L a connecting' reel. a glnelgigeonpin and integrali bearing* blfaekets for the gudgeon pine the piston sleeve, which bitadiets extend unfdfe' the lined water cooled nlnet ment.

EDWARD HENRY FRlEEND.. illbllll'l?L GIlbEi-MD BENTL"EY.

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