US1235187A - Lubrication of cam-shafts for internal-combustion engines. - Google Patents

Lubrication of cam-shafts for internal-combustion engines. Download PDF

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Publication number
US1235187A
US1235187A US12749116A US12749116A US1235187A US 1235187 A US1235187 A US 1235187A US 12749116 A US12749116 A US 12749116A US 12749116 A US12749116 A US 12749116A US 1235187 A US1235187 A US 1235187A
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United States
Prior art keywords
cam
lubrication
combustion engines
internal
shafts
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Expired - Lifetime
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US12749116A
Inventor
Louis Coatalen
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SUNBEAM MOTOR CAR CO Ltd
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SUNBEAM MOTOR CAR CO Ltd
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Priority to US12749116A priority Critical patent/US1235187A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/16—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and oscillating motion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/1828—Cam, lever, and slide

Definitions

  • the surfaces of the cams and the valveoperating mechanism for internal combustion engines are generally lubricated by splash, but this entails the presence of a comparatively large quantity of oil in the various casings, which is often objectionable. It is the object of the present invention to obviate this, particularly in the case of an engine in which the cam shaft is arranged above the cylinders.
  • the oil which is fed to the interior of the hollow cam shaft, chiefly for the lubrication of the shaft bearings, is caused to issue through a number of holes one of which lies in the plane of each cam.
  • the hole is made through what may be termed the back of the cam, that is to say, some part which is not on the swell of the cam.
  • the cam shaft A is hollow, lubricant being supplied along the interior B.
  • a radial oil passage D At the back of each cam C is formed a radial oil passage D so that a continuous stream of oil is thrown out in the plane of the cam, lubricating the rocker E at both ends, and the tappet F and its guide which all lie in the same plane. If the hole D were made upon the operative portion of the cam it would tend slightly to weaken a part which is under stress, and further the hole would be closed by the tappet once every revolution.
  • valve operating mechanism for an internal combustion engine, the combination of a cam shaft, an oil passage along said shaft, a cam on said shaft, a valve tappet, a rocker interposed between said cam and said tappet and said cam having an oil outlet formed in the back thereof through which oil is thrown out from said passage onto said rocker and said tappet, substantially as set forth.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

L. COATALEN.
LUBRICATION OF CAM SHAFTS FOR INTERNAL COMBUSTION ENGINES.
APPLICATION FILED 061224, l916.
1,235, 1 87; Patented July 31, 1917.
UNITED STATES PATENT OFFICE.
LOUIS COATALEN, 0F WOLVERI-IAMPTON, ENGLAND, ASSIGNOR OF ONE-HALF TO SUNBEAM MOTOR CAR COMPANY LIMITED, OF WOLVERHAMPTON, ENGLAND.
LUBRICATION OF CAM-SHAF'I'S FOR INTERNAL-COMBUSTION ENGINES.
Specification of Letters Patent.
Patented July 31, 1917.
Application filed October 24, 1916. Serial N 0. 127,491.
To all whom it may concern:
Be it known that I, LOUIS COATALEN, a subject of the King of Great Britain, and resident of Wolverhampton, in the county of Stafford, England, have invented certain new and useful Improvements in the Lubrication of Cam-Shafts for Internal-Combustion Engines, of which the following is a specification.
The surfaces of the cams and the valveoperating mechanism for internal combustion engines are generally lubricated by splash, but this entails the presence of a comparatively large quantity of oil in the various casings, which is often objectionable. It is the object of the present invention to obviate this, particularly in the case of an engine in which the cam shaft is arranged above the cylinders.
According to this invention, the oil which is fed to the interior of the hollow cam shaft, chiefly for the lubrication of the shaft bearings, is caused to issue through a number of holes one of which lies in the plane of each cam. The hole is made through what may be termed the back of the cam, that is to say, some part which is not on the swell of the cam.
The accompanying cross section through a cam shaft casing containing a cam shaft and lower parts makes clear how the invention may be carried out.
In this construction the cam shaft A is hollow, lubricant being supplied along the interior B. At the back of each cam C is formed a radial oil passage D so that a continuous stream of oil is thrown out in the plane of the cam, lubricating the rocker E at both ends, and the tappet F and its guide which all lie in the same plane. If the hole D were made upon the operative portion of the cam it would tend slightly to weaken a part which is under stress, and further the hole would be closed by the tappet once every revolution. By making the hole at the back of the cam a continuous stream of oil is thrown out rapidly, lubricating those parts in this plane, such as the tappet, rocker, or the like, and the hole is not closed by the rocker as there is a slight clearance between this and the part of the cam in which the hole is made.
Thus the oil supplied to the interior of the cam shaft, in addition to lubricating the cam shaft bearings in a known manner, is caused to be thrown on all the valve actuating parts without necessitating the retention of a large quantity of oil in the casing. Suitable overflows and drains are provided where required, but these form no part of the present invention.
What I claim as my invention, and desire to secure by Letters Patent, is
In valve operating mechanism for an internal combustion engine, the combination of a cam shaft, an oil passage along said shaft, a cam on said shaft, a valve tappet, a rocker interposed between said cam and said tappet and said cam having an oil outlet formed in the back thereof through which oil is thrown out from said passage onto said rocker and said tappet, substantially as set forth.
In testimony whereof I have signed my named to this specification in the presence of two subscribing witnesses.
LOUIS COATALEN.
Witnesses:
JoHN MARSTON, W. M. HIFF.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G,
US12749116A 1916-10-24 1916-10-24 Lubrication of cam-shafts for internal-combustion engines. Expired - Lifetime US1235187A (en)

Priority Applications (1)

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US12749116A US1235187A (en) 1916-10-24 1916-10-24 Lubrication of cam-shafts for internal-combustion engines.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12749116A US1235187A (en) 1916-10-24 1916-10-24 Lubrication of cam-shafts for internal-combustion engines.

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