| Patent Number |
Title Of Patent |
Date Issued |
| 6905286 |
Porous pipe and apparatus and method of producing the same |
June 14, 2005 |
| A porous pipe having an excellent absorbing and draining function, a producing apparatus capable of producing a porous pipe at high speed and low cost, and a method of producing a porous pipe are provided. The porous pipe is a pipe formed by spirally winding a tape. The pipe is formed by |
| 6659510 |
Pipe-end-connecting joint |
December 9, 2003 |
| A pipe-end-connecting joint comprisse a nipple 1 inserted in the pipe end, a holder 2 for tightening the outer circumference of the pipe end, and an elastic packing 3 divided into half parts and attached in the holder 2. The nipple 1 includes a tubular portion 11 provided in one longitud |
| 6659136 |
Flexible hose |
December 9, 2003 |
| A flexible hose having air-permeability is formed by either: sandwiching an air-permeable tape between tape end edge portions, as leading and trailing in a hose longitudinal direction, of a soft resin tape that is helically wound integrally with the air-permeable tape; or by helically wi |
| 6581979 |
Joint for spiral pipe and connecting method |
June 24, 2003 |
| The spiral pipe joint comprises a nipple 1, a caulking ring 2 and a flexible string-shaped pressure contact member 3. After an inserting portion 11 of the nipple 1 is inserted into a pipe body P, the pressure contact member 3 is wound once or more times around the outer peripheral su |
| 6471251 |
Spirally corrugated pipe elbow and method for manufacturing same |
October 29, 2002 |
| A spirally corrugated pipe elbow according to the present invention is constructed in such a manner that after a bend forming portion of a pipe body P having a given length and including a spirally corrugated pipe wall 1, with a partial portion a of the pipe wall 1 existing in the periph |
| 6435567 |
Coupling structure for tube |
August 20, 2002 |
| A coupling structure for a tube having first and second tube members coupled to each other includes a come-out preventing member adapted to be held at an outer periphery of the first tube member and restricted in its movement in a longitudinal direction of the first tube member at a tip |
| 6398270 |
Corrugated pipe joint |
June 4, 2002 |
| A corrugated pipe joint for coupling corrugated pipes includes at least two joint components, each of which includes a joint main body made of a synthetic resin and including an arc-shaped portion and tightening projecting edges which are outwardly projected from circumferential end |
| 6367849 |
Joint for corrugated pipe |
April 9, 2002 |
| A joint (and method) connects synthetic resin corrugated pipes, each of the corrugated pipes including a pipe wall having sectionally rectangular wall portions and sectionally circular wall portions disposed alternately in a longitudinal direction of the corrugated pipe. The sectionally |
| 6347646 |
Flexible hose |
February 19, 2002 |
| A flexible hose having a sufficient strength while ensuring the air permeability is provided. In a hose formed by winding a soft resin tape helically such that leading tape end brim portions and trailing end brim portions extending in the hose longitudinal direction are overlapped to |
| 6340181 |
Bellmouth with joint block body with the bellmouth and hand hole with the bellmouth |
January 22, 2002 |
| A bellmouth with a joint including a cylindrical-shaped portion having a first opening disposed at its one end so as to spread in a trumpet-like shape, a second opening disposed at the other end of the cylindrical-shaped portion, an inclined cylinder which is formed adjacent to the s |
| 6338507 |
Synthetic resin pipe with joint |
January 15, 2002 |
| A synthetic resin pipe with a joint, includes a first pipe end portion to be connected, having an open guide cylinder, a large-diameter cylindrical portion formed in a deep portion thereof continuous with the open guide cylinder and having a diameter larger than front and rear walls exte |
| 6250339 |
Sound-absorbing and heat-insulating duct |
June 26, 2001 |
| There is provided a sound-absorbing and a heat-insulating duct comprising a nonwoven cloth layer 1, a reinforcing core 2, a foam strip layer 3, a bonding resin 4 and resin-coating layer 5. The nonwoven cloth layer 1 is formed by wound spirally a nonwoven cloth 10 into a tube-like shape i |
| 6237969 |
Connector for connecting spirally corrugated pipe to wall |
May 29, 2001 |
| There is disclosed a spirally corrugated pipe-connecting connector which enables a pipe to be quite easily fixed rapidly to a handhole or the like, and maintains a sealed condition between the inside and outside of the pipe, and enables an electric cable or the like to be passed through |
| 6235232 |
Synthetic resin hose and method for producing the same |
May 22, 2001 |
| A producing method of a hose including, using a mold assembly constituted by a pair of semicylindrical molds each having a large number of intrusion grooves formed along the axial direction in the cylindrical surface of each of the semicylindrical molds substantially at regular intervals |
| 6227578 |
Corrugated resin elbow |
May 8, 2001 |
| A corrugated resin elbow comprises a corrugate-shaped synthetic resin pipe wall which includes a plurality of valley portions, a plurality of ridge portions and side surfaces respectively interposed between the valley portions and the ridge portions. At least one of the valley portions a |
| 6216742 |
Heat insulating hose |
April 17, 2001 |
| There is provided a heat insulating hose which comprises a seamless cylindrical inner tube formed of a synthetic resin, and a cylindrical heat insulating layer formed of a foamed synthetic resin for covering an outer peripheral face of the inner tube, characterized in that the inner tube |
| 6209929 |
Connector for mounting a spiral pipe onto a wall member |
April 3, 2001 |
| A connector for mounting a pipe member (P) having a spiral-shaped wall to a through hole (h) formed in a wall member (W), the connector comprises a bellmouth (1), a holder (2) and a waterproof packing member (3). The bellmouth (1) includes an engaging projection (13) which is formed on t |
| 6179009 |
Heat-insulating and noise reducing duct |
January 30, 2001 |
| There is provided a heat-insulating and noise reducing duct constituted by reinforcing core 1, a thick felt layer 2, a foamed resin strip layer 3 and a resin-coating layer 4. The reinforcing core 1 is made of hard polyolefin resin material and wound spirally at predetermined intervals. T |
| 6131616 |
Corrugated synthetic resin pipe |
October 17, 2000 |
| A corrugated synthetic resin pipe comprises a pipe wall including sectionally rectangular wall portions and sectionally circular wall portions disposed alternately in a longitudinal direction of the pipe. Each of the sectionally circular wall portions has an annular projected portion |
| 6103971 |
Cleaner hose with internal spiral wound steel and resin fibers |
August 15, 2000 |
| Two hard steel wire-made reinforcing wires and two synthetic resin wires which are harder than a soft synthetic resin pipe wall are alternately wound spirally on an inner side of the synthetic resin pipe wall while keeping predetermined intervals. |
| 6076992 |
Underdrain pipe |
June 20, 2000 |
| An underdrain pipe has a pipe wall in which wall portions rectangular in section and wall portions circular in section are disposed alternately in a longitudinal direction of the pipe, in which a number of water collecting small holes are formed in portions of the pipe wall, and in w |
| 6024130 |
Synthetic resin pipe |
February 15, 2000 |
| A pipe having a substantially square cross section portion and a substantially circular cross section portion are disposed alternately in the axial direction of the pipe. The thickness of the circular portion is set uneven in the circumferential direction. In particular, the thickness |
| 6007110 |
Bell mouth for annularly corrugated pipe |
December 28, 1999 |
| A tubular portion 1 of a bell mouth has on its outer peripheral surface one or a plurality of first projections 21 projecting radially and one or a plurality of second projections 22 projecting at a position phased differently from the first projection 21 in an axial direction and in a |
| 5981876 |
PC cable protective sheath for prestressed concrete |
November 9, 1999 |
| A sheath is provided with necessary conditions where inner and outer surfaces thereof are both formed in an uneven helical shape, where the outer surface of a trough is almost flat, where a width W of the trough between inflection points of a curve along the inner surface of the trough |
| 5950369 |
Connecting tubular body for handhole or manhole, block body for the tubular body, and handhole o |
September 14, 1999 |
| A synthetic resin tubular body is fitted into the pipe connecting hole of a handhole when used. The cut edge face at one open end side of the tubular body having square walls in cross section and circular walls in cross section which are alternately disposed in its axial direction is the |
| 5944059 |
Synthetic resin hose and method for producing the same |
August 31, 1999 |
| A synthetic resin hose includes a corrugated tube wall and an electrically conductive wire disposed substantially straight along the axial direction of the tube wall and configured so that the whole length of the electrically conductive wire on the inner circumferential surface side |
| 5887909 |
Joint for different-diameter pipes and method of connecting different-diameter pipes |
March 30, 1999 |
| A joint which is a cylindrical body having an inner circumferential surface, a diameter of which is larger than any of outer diameters of two pipes to be connected, the cylindrical body being provided with an annular projecting strip portion formed in an approximately axially intermediat |
| 5839477 |
Corrugated resin pipe |
November 24, 1998 |
| The external shape of a pipe wall is formed of sectionally rectangular wall portions and sectionally circular wall portions which are disposed alternately in an axial direction of the pipe, and the internal shape of the pipe wall is formed into a substantially linear circular-cylindrical |
| 5832960 |
Wire harness protector |
November 10, 1998 |
| In a wire harness protector, a pipe wall has a structure in which wall portions rectangular in section and wall portions circular in section are disposed alternately in the longitudinal direction, a cutting line used for insertion of the wire harness and passing substantially centers of |
| 5806567 |
Heat insulated hose |
September 15, 1998 |
| A heat insulated hose includes an approximately cylindrical inner layer having a helical cavity portion formed by unbonded overlapping of a part of a polyvinyl chloride band material, helical reinforcing wire of hard resin incorporated inside the cavity portion, a heat insulating layer m |
| 5795634 |
Heat insulating noise reducing duct |
August 18, 1998 |
| A heat insulating noise reducing duct includes: an internal layer formed by helically winding a flat fibrous band and integrally bonding outer circumferential faces of adjacent joint parts of the band by resin reinforcing bands to thereby form a substantially smooth cylindrical shape |
| 5778941 |
Cleaner hose |
July 14, 1998 |
| A cleaner hose includes a synthetic resin pipe and four reinforcing hard steel wires disposed spirally, at predetermined intervals, in the synthetic resin pipe wall. The reinforcing hard steel wires are coated wires which are coated with synthetic resin. The pipe wall includes inner |
| 5704401 |
Washing machine hose |
January 6, 1998 |
| With a desired intermediate portion as a boundary, in a hose, a corrugated wall is formed on one side of the boundary while a scalene-triangularly corrugated wall is formed on the other side of the boundary, the whole of a hose is formed of a soft synthetic resin material and a hard synt |
| 5647401 |
Reinforcing-thread-buried resin pipe |
July 15, 1997 |
| A reinforcing-thread-buried resin pipe has a structure in which, by using a device of burying reinforcing threads, one or more reinforcing threads different in color from a number of reinforcing threads are mixed in the reinforcing threads or one or more filaments different in color from |
