摘要:
An exhaust muffler disposed in proximity to a cylinder of a general-purpose engine is provided, in which an exhaust muffler for a general-purpose engine is formed from a muffler main body connected to a cylinder of a general-purpose engine via an exhaust pipe and disposed adjacent to the cylinder, a partition member that divides the interior of the muffler main body into a first muffler chamber communicating with the exhaust pipe and a second muffler chamber communicating with an exhaust outlet of the muffler main body, and an exhaust cooling pipe exposed outside the muffler main body while providing communication between the first muffler chamber and the second muffler chamber. This enables exhaust gas to be cooled effectively by passing though the exhaust cooling pipe when moving from the first muffler chamber to the second muffler chamber, thus enhancing muffling by reducing the pressure of the exhaust gas.
摘要:
In a working 4-cycle engine including a crankcase, a cylinder block inclined with respect to the crankcase, and an oil pan located in a lower portion of the crankcase. An auxiliary oil tank is disposed below the cylinder block in the direction of inclination of the cylinder block. The auxiliary oil tank communicates with the inside of the oil pan and normally assumes a position higher than the level of oil stored in the oil pan. However, when the engine is tilted down in the direction of inclination of the cylinder block, the oil stored in the oil pan flows into and is accumulated in the auxiliary oil tank. Thus, even if the engine is tilted down in the direction of inclination of the cylinder block, the oil stored in the oil pan is prevented from flowing into the cylinder.
摘要:
A process for preparing a fired-retardant polyamide, which comprises polymerizing a carboxylic acid component consisting essentially of at least one naphthalene-dicarboxylic acid selected from the group consisting of naphthalene-2,7-dicarboxylic acid and naphthalene-2,6-dicarboxylic acid and/or its amide-forming derivative, and a halogen substituted-carboxylic acid and/or its amide-forming derivative, and an aliphatic diamine, the amount of said naphthalene dicarboxylic acid and/or its derivative being at least 40 mol% of the total acid component, and the amount of said halogen-substituted carboxylic acid being such that the halogen atom content of the polyamide is at least 0.13% by weight.
摘要:
Improvement in adhesion of articles, e.g. tire cord of ethylene terephthalate or 2,6-naphthalate polyester to rubbers. The article is coated with a polyester polyurethane polymer containing segments derived from an ethylene terephthalate or 2,6-naphthalate polyester. Ratio of said segments to the balance in the polyurethane is 1:6 to 6:1. The article is then baked. Preferred coating agents for articles of an ethylene terephthalate polyester contain ethylenical unsaturations unsaturations and/or segments derived from an ethylene terephthalate polyester modified by a chain branching agent, e.g. pentaerythritol, and having a reduced viscosity of 0.1 to 0.3. Introduction of alkali metal sulfonate groups to the polyurethane is advantageous.
摘要:
Provided is a coating apparatus that suppresses the phenomenon in which a semisolid film is retained on the upper-end edge portion of the coating bath even after the circulation of the coating liquid is resumed, resulting in the occurrence of coating defects, and a method for producing an electrophotographic photosensitive member using the coating apparatus. The upper-end portion of the coating bath includes a first upper-end surface, a second upper-end surface that is positioned below the first upper-end surface and has an outer diameter larger than that of the first upper-end surface, and a step surface that interconnects the first upper-end surface and the second upper-end surface. The coating liquid is capable of overflowing from the coating bath, flowing along the second upper-end surface, and flowing while wetting the whole area of the step surface when the circulation is resumed.
摘要:
An exhaust muffler disposed in proximity to a cylinder of a general-purpose engine is provided, in which an exhaust muffler (M) for a general-purpose engine is formed from a muffler main body (15) connected to a cylinder (3) of a general-purpose engine (E) via an exhaust pipe (10) and disposed adjacent to the cylinder (3), a partition member (19) that divides the interior of the muffler main body (15) into a first muffler chamber (16) communicating with the exhaust pipe (10) and a second muffler chamber (17) communicating with an exhaust outlet (35) of the muffler main body (15), and an exhaust cooling pipe (31) exposed outside the muffler main body (15) while providing communication between the first muffler chamber (16) and the second muffler chamber (17). This enables exhaust gas to be cooled effectively by passing though the exhaust cooling pipe (31) when moving from the first muffler chamber (16) to the second muffler chamber (17), thus enhancing the muffling effect due to a reduction in the pressure of the exhaust gas.
摘要:
Provided is a coating apparatus that suppresses the phenomenon in which a semisolid film is retained on the upper-end edge portion of the coating bath even after the circulation of the coating liquid is resumed, resulting in the occurrence of coating defects, and a method for producing an electrophotographic photosensitive member using the coating apparatus. The upper-end portion of the coating bath includes a first upper-end surface, a second upper-end surface that is positioned below the first upper-end surface and has an outer diameter larger than that of the first upper-end surface, and a step surface that interconnects the first upper-end surface and the second upper-end surface. The coating liquid is capable of overflowing from the coating bath, flowing along the second upper-end surface, and flowing while wetting the whole area of the step surface when the circulation is resumed.
摘要:
A heat-and-moisture exchanger including a thin film-like porous material as a partitioning element for heat and moisture exchanges between two gases, said porous material containing numerous pores having an average diameter of not more than 5 microns and opened to both surfaces thereof, and having a thickness of not more than 500 microns, a specific surface area of at least 0.3 m.sup.2 /g, and a gas permeability having a value of at least 50 seconds/100 cc. This heat-and-moisture exchanger is used in a ventilating device and an air-conditioner.
摘要:
A process for preparing polyesters, which comprises reacting (A) a difunctional carboxylic acid component containing at least 50 mol% of a naphthalene dicarboxylic acid and/or its ester-forming derivative, (B) a diol component containing an aromatic group and at least 50 mol% of a 4,4'-bis-(.omega.-hydroxyalkoxy)diphenylsulfone and (C) an aliphatic or alicyclic diol component, the molar ratio of component (B) to component (A) being 0.05-1, and the molar ratio of the sum of components (B) and (C) to component (A) being 1.1-3.0; and then polymerizing the resulting reaction product in the presence of a catalyst while distilling off the excess of the component (C) out of the reaction system, thereby to form a polymer having a reduced viscosity of at least 0.5.