Toyoda Gosei Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Kenichi Mitsui

Norio Watanabe

Koji Ito

Naomi Nakashima

Tatsuo Suzuki

Kaoru Ito

Yasunori Uchida

Shigeki Takeo

Yoshiaki Kameda

Yoshiki Shimoda

Tadanobu Ota

Hiroshi Yamaguchi

Katsuhisa Ota

Terumitsu Shigeki

Tomohisa Imaeda

Kimio Tsubaki

Shoji Murakawa

Kaoru Itou

Hiroshi Onaka

Hajime Ogawa

Seiji Takada

Isao Fukuzono

Kunihiro Matsuo

Kazumi Korenaga

Satoshi Fukamachi

Provided is a boot seal for a variable compression ratio engine having an inner layer free from tears or creases. The boot seal comprises a boot body having a cylinder-attaching part, a crankcase-attaching part and a connecting part for connecting these parts, and a rigid plate disposed in at least one of the cylinder-attaching part and the crankcase-attaching part and having a through hole. The boot body comprises an outer layer formed by injection molding a rubber material, and an inner layer formed of fluorine-containing rubber. An injection gate for the outer layer is located at a portion of the outer layer opposing the rigid plate. Both an outer surface and an inner surface of at least a portion of the rigid plate having the through hole are covered with the rubber material supplied from the injection gate.

Boot seal for variable compression ratio engine

A boot seal for variable compression-rate engine includes a boot-seal element, and a reinforcement member. The boot-seal element includes an inner layer, and an outer layer. The inner layer is disposed on the inner face of the boot-seal element, and is composed of a fluorinated rubber. The outer layer is disposed on a more outer side of the boot-seal element than is the inner layer. Moreover, the boot-seal element is formed in a circumferentially developed state so as to have circumferential ends, and is then completed by joining the circumferential ends with each other. Thus, the boot-seal element makes an elastically deformable cylindrical bellows shape having a root that dents inward diametrically. In addition, the reinforcement member is disposed in the root of the cylindrical bellows-shaped boot-seal element at least.

Boot seal for variable compression-rate engine

A battery assembly includes single-battery cells, and thermally-conductive members. The thermally-conductive members are formed of a soft material as a plated configuration. The soft material exhibits thermal conductivity and electric insulatability. The single-battery cells, and the thermally-conductive members are adhered to each other, and are disposed one after another alternately in a row, thereby interposing the thermally-conducive members between the single-cell batteries. The thermally-conductive members include a radiation surface respectively from which heat that the single-battery cells produce radiates. The single-battery cells are cooled indirectly by cooling the radiation surfaces of the thermally-conductive members.

Battery assembly

A hose coupling assembly wherein a hose 20 having a corrugated portion 22 is coupled to a fitting block 24 by a socket 50. The fitting block 24 has a block engagement catch 25projecting from the outside rim of the block body 25. The socket 50 comprises a socket body 51 elastically expandable and contractible by being divided by a slit 51, and a socket engagement catch 51engages the block engagement catch 25. To detach the socket 50 from the fitting block 24, force is applied in a rotation direction to a push operation portion 51to cause the socket body 51 to undergo diametrical expansion, releasing the socket engagement catch 51from the block engagement catch 25.

Hose coupling assembly

A plastic pipeis a pipe utilized in a cooling water systems, and the bonding strength of each layer is heightened, and resistance capabilities of the antifreeze solution are enhanced. The plastic pipecomprises an inner layerformed from either a polyphenylene sulfide or an aromatic polysulfide, which is a denatured substance thereof, an intermediate layerwhich is a mixture of PPS resin and a polyamide resin, and an outer layerincluding a polyamide resin. The inner layeris formed such that permeation of an antifreeze, which has mainly ethylene glycol, is less than 3.0 g/mper day. The resistance capabilities of the antifreeze solution can be achieved by making the thickness of the inner layer0.2 mm or greater.

Plastic pipe and manufacturing method therefor

A fuel hose should reduce noise during fuel injection into an engine, and should not interfere with other engine components. The fuel hose supplies fuel drawn up from a fuel tank to the fuel injection valves of the engine, and is formed from a resin material which is resistant to fuel. The fuel hose comprises a hose main body having a fuel passage, and an non-circular component formed as a result of at least part of the cross sectional shape of the hose main body being non-circular. The non-circular component has a plurality of ribs running in the axial direction along the hose main body, and absorbs pulsation by the varying of the cross sectional shape of the ribs in response to variations in the pressure on the fuel flowing through the fuel passage, thereby resisting alterations to the shape in the axial direction.

Fuel hose and method for manufacturing fuel hose

A hose connecting assembly of the present invention ensures a tight seal even when a hose,is bent and laid out in a narrow space and repeatedly is subject to vibrations under a low-temperature condition. The hose connecting assembly includes a connection tube,, which is pressed into the hose,. The hose,is designed to have an inner diameter change rate Dc of no greater than 23% under application of an inner pressure of about 0.49 MPa. Ring-shaped projections,, and,are formed on the outer circumferential surface of the connection tube,. The ring-shaped projections,, and,are designed to make a diameter expansion rate T, which is defined by an inner diameter d1 of the hose,and an outer diameter D2 of the ring-shaped projections,, and,, at least 25%. A hollow cylindrical end,is further formed on an end portion of the connection tube,. It is preferable that the hollow cylindrical end,has a length of at least about 3 mm.

Hose connecting assembly

A radiator hose is provided with an inner tube rubber and a cover rubber. The inner tube rubber is coiled on the outer circumference with filament yarns made of nylon 6,6 separating predetermined spaces each other. The filament yarns are twisted at predetermined twist number before coiling, and pass through an adhesive agent supplying step, a dry-heating step while applying tension to the filament yarns and reel-hank steps, and goes into a wet-heating step. For the wet-heating step, the filament yarns are given temperature equivalent to a vulcanizing temperature, applying no tension to the filament yarns. By the wet- and dry-heating, the filament yarns are prevented from biting into the inner tube rubber. Since the filament yarns are immersed into the solution of an adhesive agent before the dry-heating, the solution attached on the filament yarns is dried off rapidly by the dry-heating thereafter.

Method of processing a filament yarn for a rubber hose

A hose connector connects a hose with a pipe which projects through a mounting member, and includes a connector body, an intermediate member and a grommet. The connector body includes a hose connector member, and a pipe connector member. The intermediate member is detachably engaged with the connector body, and includes a second engager and an engager claw. The intermediate member can be assembled with the connector body by simply engaging the second engager with the first engager of the connector body, and can be assembled with the mounting member by simply engaging the engager claw with a mounting hole of the mounting member. The grommet is held on the intermediate member so as to seal a periphery of the mounting hole of the mounting member. The hose connector enables not only to connect a hose with a pipe by snap action, but also to project a pipe through the mounting member by a reduced length.

Hose connector

A hose connecting assembly comprises a connecting tube 1 made of a resin, flexible hoses 21, 22 and 23 each having a reinforced layer which is braided with reinforcing threads, into which the connecting tube 1 is inserted, and a resin cover 3 which covers coupling portions between the hoses and the connecting tube integrally therewith. The cover 3 is formed by molding and includes a reinforcing filler and has a post-shrinkage factor of 0.2 to 0.9%. The hoses have inner diameters which have been increased 10 to 30% by the insertion of the connecting tube 1 thereto. Stress cracks are prevented from occurring and high sealing pressure is provided.

A branched hose connector includes a branched inner pipe substantially made from a suitable lightweight material, a plurality of hoses connected onto the branched inner pipe, a cover covering the branched inner pipe and a portion of the hoses to join the branched inner pipe and the hoses, and an integrally formed flange projecting outwardly. The branched hose connector is lightweight so that it can be installed with ease via the flange, and it can be manufactured easily and less expensively. Further, the branched hose connector can include a valve member, and a convexity and a concavity provided on opposing end surfaces of the branched inner pipe and the valve member. With these extra features, the valve member can be tightened into the branched inner pipe with a predetermined appropriate torque by a manual operation alone, and it can resist loosening by vibrations, or the like.

Branched hose connector

A process for producing a hose having a connecting portion includes the steps of a connecting step, and a molding step. In the molding step, a dividable mold is employed in which a first sealing member and a second sealing member are retained so as to form a sealing ring. The sealing ring firmly retains a hose in the mold without pinching and damaging it. Further, the mating surfaces of the first sealing member and the second sealing member are disposed so as to deviate from the center of the sealing ring. Furthermore, a chucking member adapted for locally pressing the hose is disposed adjacent to the sealing ring. Moreover, a recessing portion communicating with the cavity of the mold by way of a narrow passage is formed and the first minimum pressure of the molding material, enabling to pass through the narrow passage, is set less than the sealing pressure exerted between the sealing ring and the hose and is set more than the second minimum pressure thereof, enabling to inhibit the short shot failures.

Process for producing hose having connecting portion

In order to easily automate the coupling work of a pipe and a hose without damaging the mechanical strength of the structure, a hose with a coupling portion includes a nipple, a hose inserted into the end portion of the nipple, and a resin covering portion integrally covering the coupled portion of the hose and the pipe, the hose being previously configured to include a general part having an inner diameter equal to that of the nipple, a first enlarged part having a diameter enlarged at the fore end of the general part, the inner diameter of the enlarged part being smaller than the outer diameter of the nipple, and a second enlarged part having an inner diameter which gradually increases starting from the fore end of the first enlarged part and becoming larger than the outer diameter of the nipple, the first and second enlarged parts being applied to the nipple.

Hose coupling structure

In a hose fitting fixing construction according to this invention, an engagement member having restoring force of gravity or elastic force is disposed in an engagement space of a bracket. The engagement member engages with an engagement dent of a hose fitting flange inserted into the engagement space, thereby engaging the hose fitting flange with the bracket. A detachment hole may be provided on the bracket to enable easy detachment of the hose fitting flange from the bracket. A detachment jig is inserted into the detachment hole to deform the engagement member against the restoring force and disengage the engagement member from the engagement dent of the hose fitting flange, thereby enabling to detach the hose fitting flange from the engagement space. Accordingly, the hose fitting flange can be installed to the bracket by snap-action even in a limited work space, and detached with ease.

Hose fitting fixing construction

In an apparatus for manufacturing a reinforced hose, a reinforcing layer-forming device is arranged so as to be concentric with the material efflux port of an outer tube extruder and an inner tube extruder so that inner tube formation, the reinforcing layer formation and the outer tube extruding can be performed continuously and nearly at the same time on a torpedo projected beyond the top end of an inner die of the inner tube extruder. A plurality of extrusion passages into which screws of the extruder is inserted are formed in a cylinder of the inner tube extruder along the extended axial line of an inner head for investing an inner tube of the reinforced hose with a multi-layer structure.

Growing community of inventors

Aichi-ken, Japan

Kenichi Mitsui