摘要:
To provide a variable valve driving device which can accurately control the lift amount of valves and can be manufactured at a low cost. The device has: valves (10) serving as intake valves or exhaust valves of an engine; springs (11) for biasing the valves (10) in the valve closing direction; a cam (12) for pressing the valves (10) in the valve opening direction against a biasing force of the springs; a piston (19) joined to the valves (10); a control chamber (21) configured by a piston insertion hole (20) into which the piston (19) is inserted; and a control mechanism (24) for changing the valve closing timing of the valves (10) by controlling the introduction and discharge of a working fluid into and from the control chamber (21).
摘要:
The present invention relates to a method for reinforcing a structure comprising the steps of forming a primer layer on the surface of a structure to be reinforced; forming if necessary a putty layer on the primer layer; applying an impregnating resin on the formed primer layer provided that the putty layer in case where the putty layer is formed on the primer layer, before, after or before and after cladding with the fiber sheets, to allow the resin to penetrate into the spaces in the fiber sheets; and curing the resin,the said primer, putty and impregnating resin comprising a resin composition which can cure at a temperature not more than 5.degree. C.
摘要:
This invention provides a heat-sensitive transfer layer which comprises a substrate and a heat-melting ink layer provided to one surface of said substrate, characterized by providing, between said substrate and heat-melting ink layer, an interlayer which breaks away within itself by separation under heat at the time of heat transfer.
摘要:
A diaphragm for loudspeakers comprises chitin as a natural high polymeric material having a large value of Young's modulus and kraft pulp having large mechanical internal loss. Therefore, the deformation and the partial vibrations of the diaphragm during diaphragm operation do not come out due to the use of the chitin, because the flexural rigidity of the diaphragm is considerably large. Mechanical internal loss is also large owing to the use of the kraft pulp. As a result, it is possible to obtain a loudspeaker which has little fluctuation in frequency response, and which provides a superior sound pressure-frequency response, a superior distortion factor and a superior phase response.
摘要:
A heat-sensitive transfer sheet comprising a base film, a first hot melt layer composed mainly of wax, a coloring layer comprising at least one colorant and at least one a resin as a vehicle, and a second hot melt layer composed mainly of wax, these layers being formed on said base film in this order.
摘要:
In a vane pump, a pump housing contains a cam ring having an internal cam surface, in which a rotor carrying eight vanes is rotatable by a drive shaft. A pair of side plates positioned in the receiving bore in contact engagement with the opposite end surface of the cam ring, the internal cam surface and the rotor define a pump chamber. Each of the side plates is formed at its inside surface contacting the cam ring with a pair of intake ports, a pair of exhaust ports and a vane back pressure groove. This groove is always filled with pressurized fluid supplied from the exhaust ports such that the pressurized fluid is directed into vane support slits formed in the rotor. The angular width between the start point of each of the intake ports and the start point of one of the exhaust ports is chosen to an angle of 90 degrees which is twice the pitch of the vanes, and the angular width of each of the exhaust ports is chosen to be not larger than or angular width which outer end surfaces of two successive vanes make, whereby the volume of pressurized fluid which leaks from the vane back pressure groove towards the intake ports through a clearance between the rotor and each side plate can be maintained constant.
摘要:
A photoconductive material comprising a phthalocyanine and a phthalocyanine derivative in which the phthalocyanine molecule has benzene nuclei substituted with at least one member selected from nitro and cyano groups, and an electrophotographic plate comprising a photoconductive layer of the photoconductive material dispersed in a binder resin.
摘要:
In an X-ray film cassette, a front cover and a bottom cover are severally formed of carbon fiber reinforced plastics. A grid member for the removal of scattered X-rays is bonded to the inside of a panel of the front cover, and a coating layer for protection is provided to cover the whole surface of the grid member on the exposed side thereof. The coating layer is also formed of carbon fiber reinforced plastics.
摘要:
Three-dimensional structures having a suitable geometrical configuration are directly formed on one major surface of a substrate so that an epitaxial molecular beam may be incident on preselected regions, and the angles of incidence of epitaxial molecular beams are varied. As a result the arrival rates of molecular beams are varied from one region to another on the substrate so that a three-dimensional epitaxial layer in which the physical properties are different from one region of a submicron across to another may be grown.