US1410776A - Piston for internal-combustion engines - Google Patents

Piston for internal-combustion engines Download PDF

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Publication number
US1410776A
US1410776A US309325A US30932519A US1410776A US 1410776 A US1410776 A US 1410776A US 309325 A US309325 A US 309325A US 30932519 A US30932519 A US 30932519A US 1410776 A US1410776 A US 1410776A
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United States
Prior art keywords
piston
internal
combustion engines
pistons
aluminium
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US309325A
Inventor
Thomas Louis Victor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LA DU MOTEUR L THOMAS SA
Moteur L Thomas SA Du
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Moteur L Thomas SA Du
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Application filed by Moteur L Thomas SA Du filed Critical Moteur L Thomas SA Du
Priority to US309325A priority Critical patent/US1410776A/en
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Publication of US1410776A publication Critical patent/US1410776A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/24—Pistons  having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Definitions

  • MOTE'UR EL THQHIAS, 01 LYGIX, ERA-MGR LOU IS VICTOR THOMAQ; F LYON, FRANCE, ASSIGNOR T0 LA. SOGIETE ANONYLZE D m PISTON FOR INTERNAL-CQHEBUSTION ENGINES.
  • the pistons have, hitherto been comparatively large and complicated, which makes the manufacture thereof diilicult and involves considerable weight, especially in the case of two-stroke cycle pistons and pistons shaped at the base to form a deflector, and the conditions are unfavorable for obtaining perfect balance and high speeds.
  • the piston is constructed in three parts. 7
  • a ()ne of these parts, of aluminiumor equivalent light metal or alloy, forming the body of the piston is of perfectly cylindrical shape, open at both ends, all its arts.
  • Anot ier part also of aluminium or equivalent light metal or-alloy, formsthe bot tom, and is screwed to the first part: this second part can also beworked throughout.
  • the third part is'of steel and is forced onto'the two other parts: it hasthe grooves or channels for the piston rings.
  • the cylindrical part f of the piston is open at both ends: it is screwthreaded internally at g, in order to receive the head it, also of'aluminium.
  • the latter with the deflector e which forms part of it, can be easily worked throughoutbefore mounting the part.
  • head with the body can be completed by a band of autogenous solder. 'After joining reduced in diameter over a suitable'part of their length to receive a. steel sleeve jpreviously bored. the piston is finished and the grooves for the rings are cut in the sleeve
  • the sleeve y has the orifices a and b.
  • the invention allows of first opening the port of the cylinder, discharging products of combustion before theadmission of the fresh gases, and closing the exhaust port during a large part of the period of supply. The two parts are only-open together for a very short time.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Description

L. V. THOMAS.
PISTON FOR INTERNAL COMBUSTION ENGINES.
APPEICATION FILED JULYB, I919.
Patented Mar. 28,
MOTE'UR EL. THQHIAS, 01 LYGIX, ERA-MGR LOU IS VICTOR THOMAQ; F LYON, FRANCE, ASSIGNOR T0 LA. SOGIETE ANONYLZE D m PISTON FOR INTERNAL-CQHEBUSTION ENGINES.
Applicatlonflled July 6, 1919. serial No. 309,325.
To all 'uihom it may, concern:
Be itknown that I, LOUIS VICTOR Tnonas,
a citizen of the French Republic, of Lyon,
France, have invented certain new anduse- ,ful Improvements in Pistons for-Internal- Combustio'n Engines, of which the following is a specification.
In explosion motors in which the piston I controls the distribution, including twostroke cycle motors with or without valve,
the pistons have, hitherto been comparatively large and complicated, which makes the manufacture thereof diilicult and involves considerable weight, especially in the case of two-stroke cycle pistons and pistons shaped at the base to form a deflector, and the conditions are unfavorable for obtaining perfect balance and high speeds.
In order to partly obviate these drawbacks, such pistons have been made of aluminium, (but. this in no way facilitates the manufacture of the piston. any more than it enables thev piston to be exactly balanced.
- On the other hand, the aluminium, being 25' comparatively-soft, especially at high temperatures, is liable to become worn at the ciently gas-tight I I I The object of this invention is to olwiate these disadvantages. 'According' to the invention the piston is constructed in three parts. 7
a ()ne of these parts, of aluminiumor equivalent light metal or alloy, forming the body of the piston is of perfectly cylindrical shape, open at both ends, all its arts.
Anot ier part, also of aluminium or equivalent light metal or-alloy, formsthe bot tom, and is screwed to the first part: this second part can also beworked throughout. The third part is'of steel and is forced onto'the two other parts: it hasthe grooves or channels for the piston rings.
The various parts are designed in detail as required to fulfil thedistributive funcrings, and for that reason is-not always sulfi- 'tions of the piston in the particulartype of motor in which it is used.
T he invention will now be described with reference to the accompanying drawing,
. showing one form of construction, by way giving access to arranged to register at the proper times with the supply port 0 and the exhaust port ti respectively. It also has a deflector e directing the admitted gases to the top of the cylinder to prevent their mingling with the burnt gases.
The cylindrical part f of the piston, of aluminium, is open at both ends: it is screwthreaded internally at g, in order to receive the head it, also of'aluminium. The latter, with the deflector e which forms part of it, can be easily worked throughoutbefore mounting the part. head with the body can be completed by a band of autogenous solder. 'After joining reduced in diameter over a suitable'part of their length to receive a. steel sleeve jpreviously bored. the piston is finished and the grooves for the rings are cut in the sleeve The sleeve y has the orifices a and b. and the shape of the valve renders it very easy to properly adjust these orifices and to regulate exactly, with respect tothe ports 0 and (I of the cylinder, the times of opening and closing the inlet and the exhaust. The invention allows of first opening the port of the cylinder, discharging products of combustion before theadmission of the fresh gases, and closing the exhaust port during a large part of the period of supply. The two parts are only-open together for a very short time.
What I claim as my invention and desire to secure by Letters Patent of the United States is 1 In an internal combustion engine piston the combination of a cylindrical piston body of light metal externally reduced in diameter at its upper part, a piston head of light metal screwed into the upper part of said cylindrical body, a gas deflector on said piston head, integral therewith, and a steel sleeve fitted upon the reduced upper part of said body, said sleeve extending upwardly around said piston head and said deflector and having ports.
In witness whereof I have signed this specification in the presence of two witnesses.
LOUIS VICTOR THOMAS.
The junction of the Then the outer surface of Specification of Letters r atent. Pmm t fl .ltg 2% 1922 these two members they are turned down or
US309325A 1919-07-06 1919-07-06 Piston for internal-combustion engines Expired - Lifetime US1410776A (en)

Priority Applications (1)

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US309325A US1410776A (en) 1919-07-06 1919-07-06 Piston for internal-combustion engines

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127096A (en) * 1974-07-15 1978-11-28 Townsend Engineering Company Internal combustion engine
US4129101A (en) * 1976-04-19 1978-12-12 Townsend Engineering Company Internal combustion engine
WO1980001094A1 (en) * 1978-11-17 1980-05-29 Townsend Engineering Co Internal combustion engine
US9945319B1 (en) * 2015-06-25 2018-04-17 Richard Truhill Method and fuel supply system for a progressive impulse internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127096A (en) * 1974-07-15 1978-11-28 Townsend Engineering Company Internal combustion engine
US4129101A (en) * 1976-04-19 1978-12-12 Townsend Engineering Company Internal combustion engine
WO1980001094A1 (en) * 1978-11-17 1980-05-29 Townsend Engineering Co Internal combustion engine
US9945319B1 (en) * 2015-06-25 2018-04-17 Richard Truhill Method and fuel supply system for a progressive impulse internal combustion engine

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