US1744775A - Compressor or the like - Google Patents

Compressor or the like Download PDF

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US1744775A
US1744775A US233927A US23392727A US1744775A US 1744775 A US1744775 A US 1744775A US 233927 A US233927 A US 233927A US 23392727 A US23392727 A US 23392727A US 1744775 A US1744775 A US 1744775A
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connecting rod
crank
engine
crank case
opening
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US233927A
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Philip K Lindsay
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/18Mechanical movements
    • Y10T74/18056Rotary to or from reciprocating or oscillating
    • Y10T74/18208Crank, pitman, and slide
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/21Elements
    • Y10T74/2142Pitmans and connecting rods
    • Y10T74/2143Radial

Definitions

  • This invention pertains to pumping, coinpressing, or similar apparatus and has for its principal object the provision of apparatus of this type which is of very compact form and li ht weight, and which can be constructed quickly and at low cost by the employment of units which are of substantially standard type.
  • I have herein selected a portable air compressor as illustrative of one desirable embodiment of my invention, but with the understanding that in its broader aspects the invention is of more general application.
  • Fig. 1 is a fragmentary side elevation of a one cylinder internal combustion engine of standard type but modified in accordance with the present invention, the usual accessory parts being omitted;
  • Fig. 2 is a fragmentary vertical section on the line 2-2 of Fig. 1;
  • FIG. 3 is a fragmentary side elevation, to somewhat larger scale, illustrating the modified connecting rod forming a part of my present invention
  • Fig. 4 is an elevation illustrating a removable cover plate forming a desirable feature of the invention
  • Fig. 5 is a side elevation of a secondar connecting rod adapted to be attached to the connecting rod shown in Fig. 3 when the engine is to be used for direct driving of a reciprocating part;
  • Fig. 5 is a fragmentary elevation showmg the upper part of the connecting rod of Fig. 5 viewed from the left-hand side of the latter figure;
  • Fig. 6 is a composite view showing in side and end elevation a wrist pin for uniting the secondary connecting rod to the main rod;
  • Fig. 7 is an elevation illustrating a gasket adapted to be interposed between the crank case of the engine and an air compressor cylinder attached thereto;
  • Fig. 8 is a vertical section substantially on the same plane as Fig. 2, but showing the engine having an air compressor cylinder associated therewith.
  • the engine unit here disclosed is of internal combustion type and comprises the power or drive cylinder 1 mounted upon the crank case 2.
  • This crank case is of closed type and is here shown as having the integral bottom 8, although a bottom of other type may be employed.
  • the engine employs the splash system of lubrication in which the crank case normally contains a considerable amount of lubricant.
  • the engine has a crank shaft 4 provided with a crank having the crank pin 5.
  • a trunk piston (5 reciprocates in the cylinder 1 and is provided with a wrist pin 7 to which the upper end of the main connecting rod 8 is secured.
  • the lower end of this connecting rod 8 is provided with a journal opening 9 (Fig. 3) for the reception of the crank pin 5.
  • the connecting rod 8 which in other respects may be of usual construction, is provided with an outstanding boss 10 near its lower end.
  • This boss is furnished with a transverse opening 11 and is preferably split at 12 and furnished with one or more bolts 13 so that a wrist pin or other connecting element, hereinafter described, may be clamped within the opening 11.
  • the crank case 2 has one side wall 141 which is provided with a substantially vertical and flat outer surface 15.
  • the wall 14 is provided with a vertically elongate slot 16 in the vertical plane of movement of the crank-pin 5, and is also furnished with a plurality of screw-threaded openings 17.
  • the openings 17 are adapted to receive bolts 18 for securing a removable cover 19against the face 15 If desired a gasket 20 may be interposed between the cover 19 and the face 15 so as to provide a tight oint through which oil will not leak.
  • the face 15 of the crank case is substantially parallel to the axis of the crank shaft 4 and the wall 1d of the crank case having this outer flat surface 15 is preferably at that side of the crank case at which the crank moves downwardly.
  • the engine thus constructed may be manufactured by makers of standard engines and may be sold as a standard engine and used for ordinary purposes but it is easily assembled with an air compressor cylinder for direct driving of the compressor piston without taking down the engine.
  • a secondary connecting rod is indicated at 21, such connecting rod being forked at the end to provide a slot 22 and having a transverse opening 23 at such end for the reception of a wrist pin 24 (Fig. (3).
  • This wrist pin is of. a size adapted to fit in the opening 11 of the main connecting rod 8 and may be furnished with slots 25 or other elements for cooperation with a special tool or fixture by means of which it may be introduced into the opening 11.
  • the slot 16 is preferably of a minimum width sufficient to permit the smallest dimension of the end 22 the secondary connecting rod 21 to be passed through it, such narrow slot beingodesirable in order to avoid excess delivery of the lubricating material from the crank case outwardly through the slot. For the same reason it is desirable, as already pointed out, to have this slot at that side of the crank case at which the crank moves downwardly so that the lubricating medium will not be splashed or thrown violently through the slot.
  • a gasket 30 such as shown in Fig. 7 may now be slipped over the connecting rod 21, such gasket usually being of flexible or resilient material and having a narrow elongate slot 31 which may be of a width substan tially equal to the central or web portion of the connecting rod 21.
  • This gasket is also provided with openings 31 corresponding to the openings 17 in the wall 14 of the crank case.
  • a trunk piston 28 of usual type is new connected to the free end of the connecting rod 21 by means of a wrist pin 29 passing through a suitable opening 26 in the connecting rod.
  • This piston 28 is slipped into the cylinder 27 of the air compressor and the cylinder is sccured to the crank case 2 by means of bolts or rods entering the openings 17.
  • the parts new occupy the position shown in F ig. 8
  • auxiliary parts of the compressor may now be assembled in place and the apparatus completed, it being noted that the same crank case constitutes a base for both engine and air compressor, thus making a very considerable saving in weight, material and space, all of which are highly important in small portable devices of this type where it is necessary to provide a compact structure which may readily be moved from place to place and which may be sold at a low price.
  • the ease of assembly of the compressor or other driven unit with the engine permits the manufacture, on relatively small. scale, of portable air compressors and the like so that they may be sold in competition with devices of similar character made in great quantities upon a production bases, since it permits the builder to employ standards parts without requiring disassembly of such parts to permit the driving and driven units to be associated.
  • Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank pin, said connecting rod having an opening adj acent to said journal opening for the reception of means for uniting a secondary connecting rod to the main rod, the crank case having a slot in the plane of movement of the main rod, and a removable cover normally closing said slot.
  • Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal .opening for the reception of the crank pin,
  • connecting rod having means pivotally uniting a secondary connecting rod thereto, the crank case having a substantially flat outer face, and means for alternatively clamping a cover plate or a compresser cylinder against said flat face, the flat face of the crank case having an opening through which a secondary connecting rod may pass.
  • Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, the crank case being of closed type adapted to contain oil for splash lubrication, the main connecting rod having provision for uniting a secondary connecting rod thereto, the crank case having an opening in its wall through which a secondary connecting rod may be introduced and united to the main rod while the engine parts are in assembled relation, and a removable cover normally closing said opening.
  • Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case
  • said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, said connecting rod having a transverse opening for the reception of a wrist pin adapted to unite a secondary connecting rod to the main rod, the crank case having a substantially fiat outer face parallel to the axis of the crank shaft and at that side of the case at which the crank-pin moves downwardly, said flat face having a vertical slot substantially in the plane of rotation of the crank pin, said slot being of a width just suflicient to permit the passage of a secondary connecting rod therethrough.
  • Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case
  • said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, said connecting rod having a projecting boss at a point adjacent to the crank-pin receiving opening, said boss having a transverse opening therethrough, means for securing a wrist pin in the opening in the boss, the crank case having a vertical wall substantially perpendicular to the plane of rotation of the crankpin, said wall having a slot therethrough to permit a. secondary connecting rod to be connected to the main connecting rod without disassembling the engine, and means for alternatively attaching a cover plate or a compressor cylinder to said vertical wall.
  • Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, said connecting rod having a projecting boss provided with a transverse opening whose axis is parallel to the axis of the crank shaft, the boss being split and provided with means for clamping a wrist pin in said transverse opening, the crank case having a slot in its side Wall of a width substantially just sulficient to permit entry of a secondary connecting rod and the union of said secondary rod with the first rod by means of a wrist pin disposed in said transverse opening, the slotted wall of the crank case having an outer surface finished to receive the end of a secondary cylinder.

Description

Jan. 28, 1930. P. K. LINDSAY COMPRESSOR OR THE LIKE 2 Sheets-Sheet 1 Filed Nov. 17, 1927 I 171L367: i0)" 1 fyfliimsa Jan. 28, 1930. P. K. LINDSAY COMPRESSOR OR THE LIKE Filed Nov. 17, 1927 2 Sheets-Sheet 2 Patented Jan. 28, 1930 PATENT OFFICE PHILIP K. LINDSAY, OF SOMERVILLE, MASSACHUSETTS COMPRESSOR OR THE LIKE Application filed November 17, 1927. Serial No. 233,927.
This invention pertains to pumping, coinpressing, or similar apparatus and has for its principal object the provision of apparatus of this type which is of very compact form and li ht weight, and which can be constructed quickly and at low cost by the employment of units which are of substantially standard type. I have herein selected a portable air compressor as illustrative of one desirable embodiment of my invention, but with the understanding that in its broader aspects the invention is of more general application.
Small portable air compressors, such as are now commonly used for driving compressed air tools, applying liquid sprays or abrasive blasts, etc. as well as other devices having reciprocating parts, are now commonly driven by means of internal combustion engines. Usually a belt or chain drive is employed, the engine and compressor units being disposed in spaced relationship upon a wheeled platform or other suitable support. Such an arrangement occupies a considerable space; both the engine and compressor unit must be complete in itself; and the assemblage is heavy and difficult to move. In accordance with the present invention I take advantage of the general similarity in structure and mode of operation of the engine and com pressor units and greatly simplify and cheapen the combined apparatus by mounting the engine and compressor cylinders upon the same crank case, directly driving the compressor piston from the engine piston. In this way the apparatus may be made in very compact form and of decreased weight as compared with the assemblage of separate units commonly employed.
40 Since it is cheaper to employ an engine unit of substantially standard type than it would be to build the entire engine in the relatively small quantities required for this particular purpose, I provide for a very slight modification of the standard engine, such as may without difficulty and with little additional expense be made by the manufacturer of the standard engine, and when thus modified the assembled engine may be employed for gen oral purposes, if desired, or quickly connected (without disassembling it) to an air compressor or other unit for directly driving the latter.
In the accompanying drawings I have illustrated a standard type of engine, modified in accordance with my present invention, and have also shown the same engine associated with a compress r unit.
In the drawings,
Fig. 1 is a fragmentary side elevation of a one cylinder internal combustion engine of standard type but modified in accordance with the present invention, the usual accessory parts being omitted;
Fig. 2 is a fragmentary vertical section on the line 2-2 of Fig. 1;
Fig. 3 is a fragmentary side elevation, to somewhat larger scale, illustrating the modified connecting rod forming a part of my present invention;
Fig. 4 is an elevation illustrating a removable cover plate forming a desirable feature of the invention;
Fig. 5 is a side elevation of a secondar connecting rod adapted to be attached to the connecting rod shown in Fig. 3 when the engine is to be used for direct driving of a reciprocating part; Fig. 5 is a fragmentary elevation showmg the upper part of the connecting rod of Fig. 5 viewed from the left-hand side of the latter figure;
Fig. 6 is a composite view showing in side and end elevation a wrist pin for uniting the secondary connecting rod to the main rod;
Fig. 7 is an elevation illustrating a gasket adapted to be interposed between the crank case of the engine and an air compressor cylinder attached thereto; and
Fig. 8 is a vertical section substantially on the same plane as Fig. 2, but showing the engine having an air compressor cylinder associated therewith.
The engine unit here disclosed is of internal combustion type and comprises the power or drive cylinder 1 mounted upon the crank case 2. This crank case is of closed type and is here shown as having the integral bottom 8, although a bottom of other type may be employed. As illustrated the engine employs the splash system of lubrication in which the crank case normally contains a considerable amount of lubricant.
The engine has a crank shaft 4 provided with a crank having the crank pin 5. A trunk piston (5 reciprocates in the cylinder 1 and is provided with a wrist pin 7 to which the upper end of the main connecting rod 8 is secured. The lower end of this connecting rod 8 is provided with a journal opening 9 (Fig. 3) for the reception of the crank pin 5.
In accordance with this invention the connecting rod 8, which in other respects may be of usual construction, is provided with an outstanding boss 10 near its lower end. This boss is furnished with a transverse opening 11 and is preferably split at 12 and furnished with one or more bolts 13 so that a wrist pin or other connecting element, hereinafter described, may be clamped within the opening 11. v
The crank case 2 has one side wall 141 which is provided with a substantially vertical and flat outer surface 15. The wall 14 is provided with a vertically elongate slot 16 in the vertical plane of movement of the crank-pin 5, and is also furnished with a plurality of screw-threaded openings 17. The openings 17 are adapted to receive bolts 18 for securing a removable cover 19against the face 15 If desired a gasket 20 may be interposed between the cover 19 and the face 15 so as to provide a tight oint through which oil will not leak. The face 15 of the crank case is substantially parallel to the axis of the crank shaft 4 and the wall 1d of the crank case having this outer flat surface 15 is preferably at that side of the crank case at which the crank moves downwardly.
The engine thus constructed may be manufactured by makers of standard engines and may be sold as a standard engine and used for ordinary purposes but it is easily assembled with an air compressor cylinder for direct driving of the compressor piston without taking down the engine.
Referring to Figs. 5 to 8 inclusive, a secondary connecting rod is indicated at 21, such connecting rod being forked at the end to provide a slot 22 and having a transverse opening 23 at such end for the reception of a wrist pin 24 (Fig. (3). This wrist pin is of. a size adapted to fit in the opening 11 of the main connecting rod 8 and may be furnished with slots 25 or other elements for cooperation with a special tool or fixture by means of which it may be introduced into the opening 11.
In uniting the secondary connection rod 21 to the main rod it is simply necessary to remove the cover plate 19 and pass the end 22 of the secondary connecting rod through the slot 18 into the crank case of the engine, fitting the slot 22 in its end 22 over the boss 10 on the main connecting rod 8. By means of the special tool above referred to the wristpin 24': is also introduced through the slot 16 and is passed through the aligned openings 23 and 11. The bolt or bolts 13 are now tightened, thus securely clamping the wrist pin in the opening 11 and pivotally uniting the secondary connecting rod to the rod 8.
The slot 16 is preferably of a minimum width sufficient to permit the smallest dimension of the end 22 the secondary connecting rod 21 to be passed through it, such narrow slot beingodesirable in order to avoid excess delivery of the lubricating material from the crank case outwardly through the slot. For the same reason it is desirable, as already pointed out, to have this slot at that side of the crank case at which the crank moves downwardly so that the lubricating medium will not be splashed or thrown violently through the slot.
If desired a gasket 30 such as shown in Fig. 7 may now be slipped over the connecting rod 21, such gasket usually being of flexible or resilient material and having a narrow elongate slot 31 which may be of a width substan tially equal to the central or web portion of the connecting rod 21. This gasket is also provided with openings 31 corresponding to the openings 17 in the wall 14 of the crank case.
A trunk piston 28 of usual type is new connected to the free end of the connecting rod 21 by means of a wrist pin 29 passing through a suitable opening 26 in the connecting rod. This piston 28 is slipped into the cylinder 27 of the air compressor and the cylinder is sccured to the crank case 2 by means of bolts or rods entering the openings 17. The parts new occupy the position shown in F ig. 8
where the piston 28 of the air compressor unit I is directly connected to the engine unit. As above noted, this assembly of the parts is accomplished without taking down the engine or in any way disturbing or interfering with the normal position of the engine parts or its accessories. Obviously, by a relatively slight modification, the secondary connecting rod might be secured directly to the crank pin rather than to the main rod.
The auxiliary parts of the compressor may now be assembled in place and the apparatus completed, it being noted that the same crank case constitutes a base for both engine and air compressor, thus making a very considerable saving in weight, material and space, all of which are highly important in small portable devices of this type where it is necessary to provide a compact structure which may readily be moved from place to place and which may be sold at a low price. Moreover, the ease of assembly of the compressor or other driven unit with the engine permits the manufacture, on relatively small. scale, of portable air compressors and the like so that they may be sold in competition with devices of similar character made in great quantities upon a production bases, since it permits the builder to employ standards parts without requiring disassembly of such parts to permit the driving and driven units to be associated.
While I have herein illustrated certain desirable details of construction it is to be un derstood that the invention is not necessarily limited to these exact details, except as delined by the appended claims, and that while the invention has been illustrated as applied to air compressor apparatus, it is of broader utility and may be found valuable wherever a reciprocating part is to be driven directly from the crank shaft of an engine of the type herein disclosed.
I claim:
1. Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank pin, said connecting rod having an opening adj acent to said journal opening for the reception of means for uniting a secondary connecting rod to the main rod, the crank case having a slot in the plane of movement of the main rod, and a removable cover normally closing said slot.
2. Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal .opening for the reception of the crank pin,
said connecting rod having means pivotally uniting a secondary connecting rod thereto, the crank case having a substantially flat outer face, and means for alternatively clamping a cover plate or a compresser cylinder against said flat face, the flat face of the crank case having an opening through which a secondary connecting rod may pass.
3. Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, the crank case being of closed type adapted to contain oil for splash lubrication, the main connecting rod having provision for uniting a secondary connecting rod thereto, the crank case having an opening in its wall through which a secondary connecting rod may be introduced and united to the main rod while the engine parts are in assembled relation, and a removable cover normally closing said opening.
4. Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, said connecting rod having a transverse opening for the reception of a wrist pin adapted to unite a secondary connecting rod to the main rod, the crank case having a substantially fiat outer face parallel to the axis of the crank shaft and at that side of the case at which the crank-pin moves downwardly, said flat face having a vertical slot substantially in the plane of rotation of the crank pin, said slot being of a width just suflicient to permit the passage of a secondary connecting rod therethrough.
5. Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin, and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, said connecting rod having a projecting boss at a point adjacent to the crank-pin receiving opening, said boss having a transverse opening therethrough, means for securing a wrist pin in the opening in the boss, the crank case having a vertical wall substantially perpendicular to the plane of rotation of the crankpin, said wall having a slot therethrough to permit a. secondary connecting rod to be connected to the main connecting rod without disassembling the engine, and means for alternatively attaching a cover plate or a compressor cylinder to said vertical wall.
6. Apparatus of the class described having a power cylinder, a piston in the cylinder, a crank shaft provided with a crank and crankpin and a crank case, said apparatus comprising a connecting rod having a journal opening for the reception of the crank-pin, said connecting rod having a projecting boss provided with a transverse opening whose axis is parallel to the axis of the crank shaft, the boss being split and provided with means for clamping a wrist pin in said transverse opening, the crank case having a slot in its side Wall of a width substantially just sulficient to permit entry of a secondary connecting rod and the union of said secondary rod with the first rod by means of a wrist pin disposed in said transverse opening, the slotted wall of the crank case having an outer surface finished to receive the end of a secondary cylinder.
Signed by me at Boston, Mass, this fourteenth day of November, 1927.
PHILIP K. LINDSAY.
US233927A 1927-11-17 1927-11-17 Compressor or the like Expired - Lifetime US1744775A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572711A (en) * 1945-03-27 1951-10-23 Ruth M Fischer Air compressor
US20040031458A1 (en) * 2002-04-15 2004-02-19 Snyder Dale D. Modular internal combustion engines
US20080017450A1 (en) * 2006-07-20 2008-01-24 Liquid Combustion Technology, Llc. Lubrication system for a part in an internal combustion system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572711A (en) * 1945-03-27 1951-10-23 Ruth M Fischer Air compressor
US20040031458A1 (en) * 2002-04-15 2004-02-19 Snyder Dale D. Modular internal combustion engines
US6904883B2 (en) 2002-04-15 2005-06-14 Tecumseh Products Company Modular internal combustion engines
US20080017450A1 (en) * 2006-07-20 2008-01-24 Liquid Combustion Technology, Llc. Lubrication system for a part in an internal combustion system
US7975806B2 (en) 2006-07-20 2011-07-12 Liquid Combustion Technology, Llc Lubrication system for a part in an internal combustion system

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