Abstract: An exhaust system for a watercraft with an engine includes an upstream exhaust pipe including an end portion with an outlet, a water lock including an inner space accommodating the end portion, a downstream exhaust pipe connected to the water lock, and a flow direction diverter, such as a baffle. The upstream exhaust pipe guides exhaust gas from the engine to the end portion. The inner space of the water lock receives the exhaust gas from the outlet of the end portion. The downstream exhaust pipe exhausts the exhaust gas from the inner space to an outside of the watercraft body. The flow direction diverter changes a flow direction of the exhaust gas at the outlet to a cross direction which intersects a pipe axis of the end portion.

Abstract: An exhaust system for a watercraft with an engine includes an upstream exhaust pipe including an end portion with an outlet, a water lock including an inner space accommodating the end portion, a downstream exhaust pipe connected to the water lock, and a flow direction diverter, such as a baffle. The upstream exhaust pipe guides exhaust gas from the engine to the end portion. The inner space of the water lock receives the exhaust gas from the outlet of the end portion. The downstream exhaust pipe exhausts the exhaust gas from the inner space to an outside of the watercraft body. The flow direction diverter changes a flow direction of the exhaust gas at the outlet to a cross direction which intersects a pipe axis of the end portion.

Abstract: An exhaust system for a watercraft with an engine includes an upstream exhaust pipe including an end portion with an outlet, a water lock including an inner space accommodating the end portion, a downstream exhaust pipe connected to the water lock, and a flow direction diverter, such as a baffle. The upstream exhaust pipe guides exhaust gas from the engine to the end portion. The inner space of the water lock receives the exhaust gas from the outlet of the end portion. The downstream exhaust pipe exhausts the exhaust gas from the inner space to an outside of the watercraft body. The flow direction diverter changes a flow direction of the exhaust gas at the outlet to a cross direction which intersects a pipe axis of the end portion.

Abstract: An engine exhaust system has an exhaust gas passage and a coolant passage. The coolant passage surrounds at least a portion of the exhaust passage. The system is also equipped with an exhaust conduit, which mixes exhaust gases and coolant and then releases the mixture outside of a watercraft. A perforated plate has an array of holes. A central portion of the perforated plate is curved and projects downstream within the exhaust conduit. This curved central portion enables the exhaust gas and the coolant to mix after passing through the perforated plate. A guide tube is positioned downstream of the perforated plate, so that the exhaust gases pass through the guide tube after passing through the holes of the perforated plate. The coolant passes through outer holes of the perforated plate and then passes around the circumference of the guide tube and is ultimately mixed with the exhaust gases.

Abstract: A variable displacement pump has a cam ring, a rotor, a plurality of vanes, a pressure plate and a rear body. The cam ring is accommodated within a pump body. The rotor rotates within the cam ring. The plurality of vanes are inserted retractably into slits formed at regular intervals circumferentially in the rotor. The pressure plate and the rear body carry the cam ring and the rotor. A circular groove communicating to a back pressure inlet bore on a bottom portion of the slits is formed in a suction area on a face of the rear body on a side of the rotor. The groove is communicated via a communication passage to a passage between a power steering gear and a tank T to introduce a working oil after used in the power steering gear.

Abstract: An engine exhaust system has an exhaust gas passage and a coolant passage. The coolant passage surrounds at least a portion of the exhaust passage. The system is also equipped with an exhaust conduit, which mixes exhaust gases and coolant and then releases the mixture outside of a watercraft. A perforated plate has an array of holes. A central portion of the perforated plate is curved and projects downstream within the exhaust conduit. This curved central portion enables the exhaust gas and the coolant to mix after passing through the perforated plate. A guide tube is positioned downstream of the perforated plate, so that the exhaust gases pass through the guide tube after passing through the holes of the perforated plate. The coolant passes through outer holes of the perforated plate and then passes around the circumference of the guide tube and is ultimately mixed with the exhaust gases.

Abstract: A method of assembling a paper box, comprising a 1st step of carrying a paper box (10a) with unfolded both side wall members (26) and (27) into a clearance between a fixed stand (101) and a guide member (100) in the condition that the positions of folded parts (22) and (23) aligned with the positions of both outer end parts of the guide member (100) at a folding station (47) where the guide member (100) is disposed with a slight clearance provided above the fixed stand (101) and a clearance at both end parts thereof set equal to a clearance at the folded parts (22) and (23), a 2nd step of driving a folding member (105) so as to fold both side wall members (26) and (27) to the inside with reference to the outer end part of the guide member (100) in contact with the folded parts (22) and (23), and a 3rd step of extracting the paper box (10a) with bent both side wall members (26) and (27) from the folding station (47) by holding the front side of the paper box (10a) in its moving direction.

Abstract: A variable displacement pump has a cam ring, a rotor, a plurality of vanes, a pressure plate and a rear body. The cam ring is accommodated within a pump body. The rotor rotates within the cam ring. The plurality of vanes are inserted retractably into slits formed at regular intervals circumferentially in the rotor. The pressure plate and the rear body carry the cam ring and the rotor. A circular groove communicating to a back pressure inlet bore on a bottom portion of the slits is formed in a suction area on a face of the rear body on a side of the rotor. The groove is communicated via a communication passage to a passage between a power steering gear and a tank T to introduce a working oil after used in the power steering gear.

Abstract: A method of assembling a paper box, comprising a 1st step of carrying a paper box (10a) with unfolded both side wall members (26) and (27) into a clearance between a fixed stand (101) and a guide member (100) in the condition that the positions of folded parts (22) and (23) aligned with the positions of both outer end parts of the guide member (100) at a folding station (47) where the guide member (100) is disposed with a slight clearance provided above the fixed stand (101) and a clearance at both end parts thereof set equal to a clearance at the folded parts (22) and (23), a 2nd step of driving a folding member (105) so as to fold both side wall members (26) and (27) to the inside with reference to the outer end part of the guide member (100) in contact with the folded parts (22) and (23), and a 3rd step of extracting the paper box (10a) with bent both side wall members (26) and (27) from the folding station (47) by holding the front side of the paper box (10a) in its moving direction.

Abstract: An internal gear oil pump made of Al alloys having less mutual damage property and superior wear resistance is provided. The internal gear oil pump has a casing with a gear compartment, a drive gear, and a driven gear, all of which are the structural members of the internal gear oil pump. The casing is constituted of an Al-alloy casting. The drive gear and the driven gear are constituted of a hot plastic working material of Al—Si alloy powder. The hot plastic working material is constituted of an Al—Si alloy having a structure in which unit crystal phases are dispersed in a base matrix by 10 to 40 area percent. by the structural observation with an optical microscope, the unit. crystal phases being harder than the base matrix. The base matrix is constituted of an Al—Si alloy which contains, on weight basis, 10% to 18% Si, 4% to 8% Fe, 1% to 3% Ni, 1% to 3% Cr, and the balance being Al and incidental impurities.

Abstract: A box container having a bottom plate on which a rift is formed through one pair of opposite angles and a fold is running through each center of the other pair of opposite angles and having side plates each of which is connected in one piece to the periphery of said bottom plate, wherein the box container is pressed to be flat so as not to be bulky in transportation and storage and, in the case of assembling this box container, the bottom plate is unfolded to be flat along the folds which were provided on the bottom plate of said box container and, further, the whole of the bottom plate is fixed by sticking a quadrangular back plate thereto.

Abstract: A flow-control valve exhibits a flow-drooping characteristic such that the liquid supply into an oil pressure mechanism is decreased in response to an increase of the amount of liquid discharge from a pump. The pump outlet passage forms branches into a fluid supply passage communicating with an oil pressure mechanism and a recirculating passage back to an oil tank. A control valve located in the recirculating passage is opened in response to the fluid increase from the pump to recirculate a part of the fluid into the tank. An orifice not receiving large influences of the pressure variation is disposed either at the pump outlet passage or the recirculating passage and a variable orifice valve is disposed in the fluid supply passage. The variable orifice is controlled by the pressure differential existing between the upstream and downstream portions of the orifice at either location.

Abstract: The invention provides a novel method for manufacturing fused quartz glass by the decomposition and oxidation of a vaporizable silicon compound such as silicon tetrachloride in a plasma flame according to which the quartz glass rod produced contains a controlled amount of hydroxy groups with high reproducibility. The principle of the inventive method consists in the admixture of gaseous hydrogen chloride into the gaseous reactant mixture or in the plasma-supporting gas as the source for the hydrogen atoms to be converted to the hydroxy groups in place of hydrogen gas or water vapor as the hydrogen source. Good proportionality is established between the concentration of the hydrogen chloride in the gaseous feed and the hydroxy content in the resultant fused quartz glass rod.

Abstract: The invention provides a method for molding a block of a fused quartz glass by the plastic deformation of a starting block with smaller dimensions at a high temperature. The molding procedure is carried out in a graphite mold under compression at a temperature of 1700.degree. C. or higher in an atmosphere of helium at a pressure in the range, preferably, from 50 to 500 Torr. The cooling schedule as specified is also of importance in order that the molded quartz glass block is freed from any strain or cracks.

Abstract: A flow-control valve exhibits a flow-drooping characteristic such that the liquid supply into an oil pressure mechanism is decreased in response to an increase of the amount of liquid discharge from a pump. The pump outlet passage forms branches into a fluid supply passage communicating with an oil pressure mechanism and a recirculating passage back to an oil tank. A control valve located in the recirculating passage is opened in response to the fluid increase from the pump to recirculate a part of the fluid into the tank. An orifice not receiving large influences of the pressure variation is disposed either at the pump outlet passage or the recirculating passage and a variable orifice valve is disposed in the fluid supply passage. The variable orifice is controlled by the pressure differential existing between the upstream and downstream portions of the orifice at either location.

Abstract: An ethylenic hydrocarbon is reacted with carbon tetrachloride in the presence of an alkyl phosphite, an iron chloride and a nitrile compound. According to this process, tetrachloroalkanes having more than two carbon atoms can be obtained in high yields.

Abstract: Cyclic polydiorganosiloxanes, in particular, cyclic trisiloxanes are continuously prepared from mixed polydiorganosiloxane, the starting material, by subjecting them to thermal cracking and rectification in a reactor composed of a column, vertically held, comprising a catalyst zone at the lower part in which the thermal cracking takes place to produce cyclic polydiorganosiloxanes and a rectification zone at the upper part in which the cyclic polydiorganosiloxanes are rectified into several fractions and a still positioned below the column. The cyclic polydiorganosiloxanes have structures different from the starting polydiorganosiloxanes.