US2964364A

US2964364A - Pistons for internal combustion engines

Info

Publication number: US2964364A
Application number: US713670A
Authority: US
Inventors: William F Morgan
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-02-06
Filing date: 1958-02-06
Publication date: 1960-12-13
Anticipated expiration: 1977-12-13

Description

Dec. 13, 1960 I w. F. MORGAN 2,964,364

PISTONS FOR INTERNAL COMBUSTION ENGINES Filed Feb. 6, 195a William F. Morgen.

BY/a

ATTORNEY.

United States Patent PISTONS FOR INTERNAL COMBUSTION ENGINES William F. Morgan, 1401 S. Jefferson Ave., Saginaw, Mich.

Filed Feb. 6, 1958, Ser. No. 713,670

1 Claim. (Cl. 309-9) This invention relates to a piston for an internal combustion engine designed with the object in view, first to distribute the temperature as much as possible evenly throughout the structure of the piston; secondly to reduce the weight of the piston without impairing the required strength of same; thirdly to reduce friction caused by an uneven expansion, which would increase the flow of lubricating oil into the combustion chamber; and fourthly to provide adequate support of the wrist pin.

Thus the main object of the pillar straps support, which have the wrist pin afiixed and suspended from the celing, is to by-pass the excessive heat which has a tendency to effect the piston walls at the wrist pin section.

With the above and other objects in view, this invention consists of the novel features of construction, combination and arrangement of parts, hereinafter fully described, claimed and illustrated in the accompanying drawing forming part of this application, and in which similar characters of reference indicate corresponding parts in all views, and in which:

Figure 1 is a longitudinal sectional view of my invention.

Figure 2 is a sectional view of Figure 1.

Figure 3 is a partly sectional view.

Figure 4 is also a partly sectional view; while Figure 5 is a horizontal view of Figure 4.

In the customary construction of pistons in combustion engines, the wrist pin bosses are cast to the interior sides of the piston walls, or to cross struts which are supported by side walls of the piston when the connecting rod is assembled with the piston and wrist pin; this type of construction has the tendency to expand the piston into a non-cylindrical or out of round shape, as the temperature will flow directly to the wrist pin bosses, that is a mass of material, and accordingly expands more than the thin walled parts of the piston. My new construction of a piston for an internal reciprocating combustion engine is entirely different, as the aforesaid objects in view in regard to the construction of said piston are accomplished as hereinafter set forth.

The piston as shown in Figures 1 and 2 has on its inner ceiling head downwardly suspended two pillar metal struts 12 for each of the wrist pin bosses 14, which latter have no connection with the outer wall 16 of the piston. Both wrist pin boss struts 12 have a cross strap with the space clearance 18 from the ceiling and the connecting rod assembly. The strap 15 support the struts 12 to check vibration of said struts and piston.

The wrist pin bosses 14 are parallel to the wrist pin assembly. To the inner side of the piston wall 16 are cast under each wrist pin boss a block 22 serving as a support to the wrist pin bosses as at 26, so that the heat transfer to the piston wall and the vibration are considerably reduced.

As in this construction the mass of the material is separated, as shown in Figure 1 by the space 34, the heat from the celing of the piston is evenly transferred to the lower part of the piston, whereby is avoided a deformation of the piston wall 16 expanding unevenly and pressing against the cylinder walls on one side while giving room on the other side so as to permit oil to work itself upwardly to the combustion chamber; thus by eliminating such disadvantages a free working evenly spaced piston is operating within the cylinder, as shown herein.

A further advantage obtained for the combustion engine is that the piston is light of weight, as the wrist pin 28 is anchored to the connecting rod 36 by a bolt 30, and the bearings 38 are placed in the two wrist pin bosses 14, whereby the wrist pin bosses can be made shorter.

Another piston assembly whereby to obtain similar results, as above, is that the piston is made of two parts, an upper part 50 with the metal strap and bosses, and another lower and cylindrical part 52 which is fastened to the upper part by means of studs 54 and nuts 56.

It is obvious that changes may be made in the form, construction and arrangement of the several parts, as shown, within the scope of the appended claim, without departing from the spirit of the invention, and I do not, therefore, wish to limit myself, to the exact construction shown and described herein.

What I claim as new and desire to secure by Letters Patent of the United States, is:

A piston having wrist pin bosses connected to a connecting rod by a wrist pin, the head of said piston having -.an inner ceiling, a pair of two pillar metal struts suspended from said ceiling head, each connecting a wrist pin boss thereto, said wrist pin bosses having no connection with the inner wall of said piston, said wrist pin boss struts being connected by a cross strut having space clearance from said inner ceiling, said wrist pin being coaxially journalled in said bosses and blocks secured to the inner wall of the piston and arranged under the wrist pin bosses to support said bosses, whereby the heat transfer to the piston wall and the vibration are reduced.

References Cited in the file of this patent UNITED STATES PATENTS 1,427,930 Baker Sept. 5, 1922 1,494,483 Howe May 20, 1924 1,745,860 Noble Feb. 4, 1930 1,752,816 Sologaistoa Apr. 1, 1930 2,017,348 Long Oct. 15, 1935 2,494,748 Ernestus Jan. 17, 1950