USRE43942E1 - Reinforced flexible hose - Google Patents

Reinforced flexible hose Download PDF

Info

Publication number
USRE43942E1
USRE43942E1 US13/295,084 US29508497A USRE43942E US RE43942 E1 USRE43942 E1 US RE43942E1 US 29508497 A US29508497 A US 29508497A US RE43942 E USRE43942 E US RE43942E
Authority
US
United States
Prior art keywords
stitches
lines
layer
rows
outside diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US13/295,084
Inventor
Rinaldo Mezzalira
Valentino Vigolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fitt SpA
Original Assignee
Fitt SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fitt SpA filed Critical Fitt SpA
Priority to US13/295,084 priority Critical patent/USRE43942E1/en
Application granted granted Critical
Publication of USRE43942E1 publication Critical patent/USRE43942E1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/20—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting articles of particular configuration
    • D04B21/205—Elongated tubular articles of small diameter, e.g. coverings or reinforcements for cables or hoses
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/02—Reinforcing materials; Prepregs

Definitions

  • the present invention relates to a flexible hose made of plastic or reinforced rubber, with a tubular braiding made of fabric which can be used in the field of irrigation or in the field of the delivery of pressurized fluids in open or closed circuits.
  • Conventional flexible hoses of the above described type are generally formed by a first tubular inner layer, made of plastic or rubber, on which a tubular fabric is applied for increasing the pressure resistance of the flexible hose, reducing its deformation and increasing its performance.
  • tubular reinforcement fabric is constituted by a series of threads spirally wound on the flexible hose in parallel and equidistant rows and superimposed on an equal number of transverse threads along likewise parallel and equidistant lines which are arranged symmetrically with respect to the axis of the hose so as to form a mesh with diamond-shaped cells.
  • the fabric surrounding the outer surface of the inner layer of plastic is then covered by a further outer layer of plastic or rubber which is generally but not necessarily transparent and fixes the meshed fabric to the flexible hose and protects it.
  • a further outer layer of plastic or rubber which is generally but not necessarily transparent and fixes the meshed fabric to the flexible hose and protects it.
  • a drawback of the above described mesh-reinforced hose is the fact that its flexibility is relatively limited; that is to say, the bending radiuses to which the hose can be subjected are rather wide with respect to knit hoses.
  • Another conventional type of flexible hose is the one in which the braiding that surrounds the outer part of the hose is formed by knitting instead of weaving.
  • EP-A-0 527 512 in the name of this same Applicant, discloses a hose provided with a particular knit reinforcement in which the individual stitches are shaped like trapezoidal loops with filaments which interweave in the corners. This type of knit reinforcement has the virtue of making the hose stronger than similar knit flexible hoses.
  • knitting is a special weaving which is obtained by means of one or more threads which are mutually linked with more or less complex turns, also known as loops or basic stitches, which give the knit fabric great elasticity.
  • So-called chain knitting is constituted by a series of mutually parallel threads which are fed by multiple spools and are curved so as to form an equal number of lines of stitches which are interlocked both in the weft direction and in the chain direction; their interweaving produces a transverse series of rows of stitches and a longitudinal series of lines of stitches or cords.
  • One of the commercially most frequent flexible hoses is the one in which the knitting is of the tricot chain type, where this term describes a stitch in which each thread forms the stitch by interweaving with one or more threads to its right and with one or more threads to its left.
  • the flexible hose with tricot knitting is more flexible, since notoriously the knitting yields as the diameter of the hose increases because of the pressure increase, on the other hand the shortcoming of knitted fabric, and especially of tricot-knitted fabric, is that as the pressure increases, the hose is subjected to a torsional effect by the fluid which flows under pressure inside it. This is due to the helical orientation of the rows of stitches which, by contrast with the substantially longitudinal orientation of the lines, cause an unbalanced reaction, and particularly torque, in the hose.
  • EP-A-0 623 776 in the name of this same Applicant discloses a hose which includes, from the inside outward: an inner layer of plastic or rubber which has an outer surface; a chain-knit part, which has rows and lines of stitches, and has a tubular shape and is wound in a single layer around the outer surface of the inner layer; and an outer stitch protection layer; wherein the lines and rows of stitches are inclined in opposite directions with substantially the same inclination with respect to the longitudinal axis of the hose in order to eliminate the effects of the torque produced by the pressure loads inside the hose.
  • An aim of the present invention is to eliminate the above described drawbacks.
  • a further aim of the invention is to provide a correlation between the various parameters of the braiding and those of the inner layer, such as to eliminate the torque produced on the knitted fabric by the pressure of the fluid, without thereby renouncing flexibility and bursting pressure resistance characteristics.
  • a flexible hose according to the invention which in accordance with the content of the first claim includes: at least one inner tubular layer of plastic or rubber which has an outside diameter and a longitudinal axis; a knitted reinforcement of the chain type, which has rows of substantially parallel stitches and lines of substantially parallel stitches with respective stitch counts per unit length in a longitudinal direction, the knitted reinforcement layer being provided in the form of a single tubular layer and being wrapped-around the outer surface of the inner tubular layer coaxially thereto, the rows and lines of stitches being substantially helical with respective longitudinal pitches and inclinations which are mutually opposite with respect to the longitudinal axis, so as to eliminate the torque applied by the pressure of the fluid inside it; and an outer layer which is superimposed on the reinforcement layer to protect it; characterized in that the longitudinal pitch of the lines of stitches is substantially proportional to the square of the outside diameter of the inner layer.
  • the pitch of the lines of stitches must increase as the inner diameter but not according to a linear relation but rather according to a quadratic relation, in order to effectively contrast the rotation induced by the uncoiling of the helical threads of the stitches.
  • the longitudinal pitch of the rows of stitches can be kept substantially constant and independent of the outside diameter of the inner layer.
  • the number of lines of stitches per unit length of the hose is directly proportional to the outside diameter of the inner layer.
  • FIG. 1 is a view of a portion of the flexible hose according to the invention.
  • FIG. 2 is a sectional view of the hose of FIG. 1 ;
  • FIG. 3 is a diagram showing the main parameters of the chain knitting of the reinforcement braiding according to the invention with respect to the outside diameter of the inner layer.
  • the flexible hose according to the invention is formed by an inner layer 2 made of polymeric or elastomeric material such as PVC, natural or synthetic rubber, which is essentially tubular and has a longitudinal axis Y which coincides with the axis of the flexible hose, an inner surface which has an inside diameter ⁇ i , and an outer surface which has a diameter ⁇ o .
  • an inner layer 2 made of polymeric or elastomeric material such as PVC, natural or synthetic rubber, which is essentially tubular and has a longitudinal axis Y which coincides with the axis of the flexible hose, an inner surface which has an inside diameter ⁇ i , and an outer surface which has a diameter ⁇ o .
  • a chain-knitted part is knitted on the inner layer 2 and is formed by substantially helical rows 4 of stitches, which are mutually parallel and have an inclination angle ⁇ with respect to the axis Y of the hose 10 of FIG. 2 , and by lines 5 which are also substantially helical and have an inclination angle B with respect to the axis Y, but in the opposite direction with respect to the rows 4 .
  • the rows and lines have respective longitudinal pitches P m and P r . Furthermore, the linear count or number of lines per unit length (100 mm) of the rows or stitches is respectively N m and N r .
  • the constant K of formula (1) is generally between 0.35 and 0.50 mm ⁇ 1 and is preferably equal to approximately 0.45 mm ⁇ 1 .
  • the knitted reinforcement of the hose of FIG. 1 is formed by chain stitches of the tricot type. These stitches are formed directly on the hose by so-called knitting machines which are commercially available and whose stitch-forming method is well-known.
  • the longitudinal pitch P m of the rows of stitches can be kept substantially constant and independent of the outside diameter ⁇ o of the inner layer.
  • the number N r of lines of stitches per unit length of the hose is substantially directly proportional to the outside diameter ⁇ o .
  • angles ⁇ and ⁇ are generally mutually different, but their sum is approximately constant and equal to, or slightly smaller than, 90° as the value of the outside diameter ⁇ o of the inner layer 2 varies.
  • the inclination angle ⁇ of the lines of stitches 5 is substantially proportional to the square root of the outside diameter ⁇ o of the inner layer 2 .
  • N m is substantially constant and is between 30 and 40 rows per 100 mm, with an average value of 35 rows per 100 mm.
  • the number of lines per unit length N r is substantially proportional to the outside diameter ⁇ o of the inner layer 2 and is between 10 and 16 rows per 100 mm.
  • an outer layer 6 made of plastic or rubber locks the chain knitting thus formed on the surface of the hose, as occurs besides in all known flexible hose structures.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Knitting Of Fabric (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

A reinforced flexible hose includes at least one inner tubular layer (2) of plastic or rubber, a knitted reinforcement (3), which has substantially, parallel rows (4) and lines (5) of substantially parallel stitches, with respective stitch counts per unit length of the hose (Nm, Nr); and an outer layer (6) which is superimposed on the reinforcement layer (3) to protect it. The knitted reinforcement layer (3) is provided in the form of a single tubular layer and is wrapped around the outer surface of the inner tubular layer (2); the rows (4) and lines (5) of stitches are substantially helical, with respective longitudinal pitches (Pm, Pr) and inclinations which are mutually opposite with respect to the longitudinal axis (Y). The longitudinal pitch 2 (Pr) of the lines (5) of stitches is substantially proportional to the square of the outside diameter (φo) of the inner layer (2), whilst the number of lines (Nr) of stitches per unit length of the hose is directly proportional to the outside diameter (φo) of the inner layer (2).

Description

The present invention relates to a flexible hose made of plastic or reinforced rubber, with a tubular braiding made of fabric which can be used in the field of irrigation or in the field of the delivery of pressurized fluids in open or closed circuits.
Conventional flexible hoses of the above described type are generally formed by a first tubular inner layer, made of plastic or rubber, on which a tubular fabric is applied for increasing the pressure resistance of the flexible hose, reducing its deformation and increasing its performance.
One of the most widespread and most suitable conventional hose is the so-called “mesh-reinforced” type, in which the tubular reinforcement fabric is constituted by a series of threads spirally wound on the flexible hose in parallel and equidistant rows and superimposed on an equal number of transverse threads along likewise parallel and equidistant lines which are arranged symmetrically with respect to the axis of the hose so as to form a mesh with diamond-shaped cells.
The fabric surrounding the outer surface of the inner layer of plastic is then covered by a further outer layer of plastic or rubber which is generally but not necessarily transparent and fixes the meshed fabric to the flexible hose and protects it. With this type of braiding, the flexible hose is suitable to withstand a higher pressure than the hose without braiding and to reduce its deformation, because the weaving is of the non-stretch type and therefore prevents the inner layer from deforming.
A drawback of the above described mesh-reinforced hose is the fact that its flexibility is relatively limited; that is to say, the bending radiuses to which the hose can be subjected are rather wide with respect to knit hoses.
Another conventional type of flexible hose is the one in which the braiding that surrounds the outer part of the hose is formed by knitting instead of weaving.
EP-A-0 527 512, in the name of this same Applicant, discloses a hose provided with a particular knit reinforcement in which the individual stitches are shaped like trapezoidal loops with filaments which interweave in the corners. This type of knit reinforcement has the virtue of making the hose stronger than similar knit flexible hoses.
It is known that knitting is a special weaving which is obtained by means of one or more threads which are mutually linked with more or less complex turns, also known as loops or basic stitches, which give the knit fabric great elasticity.
So-called chain knitting is constituted by a series of mutually parallel threads which are fed by multiple spools and are curved so as to form an equal number of lines of stitches which are interlocked both in the weft direction and in the chain direction; their interweaving produces a transverse series of rows of stitches and a longitudinal series of lines of stitches or cords.
One of the commercially most frequent flexible hoses is the one in which the knitting is of the tricot chain type, where this term describes a stitch in which each thread forms the stitch by interweaving with one or more threads to its right and with one or more threads to its left.
Although, on one hand, the flexible hose with tricot knitting is more flexible, since notoriously the knitting yields as the diameter of the hose increases because of the pressure increase, on the other hand the shortcoming of knitted fabric, and especially of tricot-knitted fabric, is that as the pressure increases, the hose is subjected to a torsional effect by the fluid which flows under pressure inside it. This is due to the helical orientation of the rows of stitches which, by contrast with the substantially longitudinal orientation of the lines, cause an unbalanced reaction, and particularly torque, in the hose.
EP-A-0 623 776 in the name of this same Applicant discloses a hose which includes, from the inside outward: an inner layer of plastic or rubber which has an outer surface; a chain-knit part, which has rows and lines of stitches, and has a tubular shape and is wound in a single layer around the outer surface of the inner layer; and an outer stitch protection layer; wherein the lines and rows of stitches are inclined in opposite directions with substantially the same inclination with respect to the longitudinal axis of the hose in order to eliminate the effects of the torque produced by the pressure loads inside the hose.
This prior patent provides no correlation among the various parameters of the knit reinforcement part, such as the pitch, the inclination and the thread count per unit length, neither among them or with respect to the dimensional parameters of the inner layer. Accordingly, due to the large number of parameters involved and to their large number of possible combinations, the person skilled in the art does not have all the information required to assuredly achieve the intended results or at least optimize the anti-torque effect of the hose.
An aim of the present invention is to eliminate the above described drawbacks.
A further aim of the invention is to provide a correlation between the various parameters of the braiding and those of the inner layer, such as to eliminate the torque produced on the knitted fabric by the pressure of the fluid, without thereby renouncing flexibility and bursting pressure resistance characteristics.
This aim and other objects which will become apparent hereinafter are achieved by a flexible hose according to the invention, which in accordance with the content of the first claim includes: at least one inner tubular layer of plastic or rubber which has an outside diameter and a longitudinal axis; a knitted reinforcement of the chain type, which has rows of substantially parallel stitches and lines of substantially parallel stitches with respective stitch counts per unit length in a longitudinal direction, the knitted reinforcement layer being provided in the form of a single tubular layer and being wrapped-around the outer surface of the inner tubular layer coaxially thereto, the rows and lines of stitches being substantially helical with respective longitudinal pitches and inclinations which are mutually opposite with respect to the longitudinal axis, so as to eliminate the torque applied by the pressure of the fluid inside it; and an outer layer which is superimposed on the reinforcement layer to protect it; characterized in that the longitudinal pitch of the lines of stitches is substantially proportional to the square of the outside diameter of the inner layer.
Surprisingly, it has been found that in order to eliminate the torque induced by the internal pressure of the fluid, the pitch of the lines of stitches must increase as the inner diameter but not according to a linear relation but rather according to a quadratic relation, in order to effectively contrast the rotation induced by the uncoiling of the helical threads of the stitches.
At the same time, the longitudinal pitch of the rows of stitches can be kept substantially constant and independent of the outside diameter of the inner layer.
Preferably, the number of lines of stitches per unit length of the hose is directly proportional to the outside diameter of the inner layer.
Further characteristics and advantages of the present invention will become apparent from the following description of a preferred embodiment of the invention, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
FIG. 1 is a view of a portion of the flexible hose according to the invention;
FIG. 2 is a sectional view of the hose of FIG. 1;
FIG. 3 is a diagram showing the main parameters of the chain knitting of the reinforcement braiding according to the invention with respect to the outside diameter of the inner layer.
With reference to the above figures, the flexible hose according to the invention, generally designated by the reference numeral 1, is formed by an inner layer 2 made of polymeric or elastomeric material such as PVC, natural or synthetic rubber, which is essentially tubular and has a longitudinal axis Y which coincides with the axis of the flexible hose, an inner surface which has an inside diameter φi, and an outer surface which has a diameter φo.
A chain-knitted part, generally designated by the reference numeral 3, is knitted on the inner layer 2 and is formed by substantially helical rows 4 of stitches, which are mutually parallel and have an inclination angle α with respect to the axis Y of the hose 10 of FIG. 2, and by lines 5 which are also substantially helical and have an inclination angle B with respect to the axis Y, but in the opposite direction with respect to the rows 4.
The rows and lines have respective longitudinal pitches Pm and Pr. Furthermore, the linear count or number of lines per unit length (100 mm) of the rows or stitches is respectively Nm and Nr.
It is known that if the outside diameter φo of the inner layer 2 on which the braiding 3 is wound increases, it is necessary to increase the pitch of the lines in order to be able to contain the torque. However, until now a precise correlation between these parameters had not been established. Surprisingly, tests and experiments have allowed to verify that the relation between these parameters is not linear but is instead quadratic.
In other words, this relation can be expressed by the general formula:
Pr=Kφ2   (1)
where the parameter K depends on the materials and units of measure used.
In the case of PVC and if all parameters are expressed in mm, the constant K of formula (1) is generally between 0.35 and 0.50 mm−1 and is preferably equal to approximately 0.45 mm−1.
It is noted that the knitted reinforcement of the hose of FIG. 1 is formed by chain stitches of the tricot type. These stitches are formed directly on the hose by so-called knitting machines which are commercially available and whose stitch-forming method is well-known.
With this crossed and inclined arrangement with respect to the axis Y of the hose, the torque which occurs on the hose in case of normal chain stitches, for example with substantially longitudinal lines, is canceled out. On the contrary, by arranging the lines transversely instead of longitudinally the rotary force component which appeared due to the coiling of the spiral-shaped rows 5 is compensated.
With this type of knitting, the forces produced by the lines and rows of stitches mutually compensate until they cancel each other out, thus making the hose 1 substantially insensitive to the torque induced by the pressure of the fluid inside the hose.
It is noted instead that the longitudinal pitch Pm of the rows of stitches can be kept substantially constant and independent of the outside diameter φo of the inner layer.
Furthermore, the number Nr of lines of stitches per unit length of the hose is substantially directly proportional to the outside diameter φo.
The angles α and β are generally mutually different, but their sum is approximately constant and equal to, or slightly smaller than, 90° as the value of the outside diameter φo of the inner layer 2 varies.
In particular, it has been observed that the inclination angle β of the lines of stitches 5 is substantially proportional to the square root of the outside diameter φo of the inner layer 2.
When using values between 12 and 37 mm for the outside diameter φo and between 10 and 32 mm for the inside diameter φi, it has been observed that the number of rows per unit length Nm is substantially constant and is between 30 and 40 rows per 100 mm, with an average value of 35 rows per 100 mm.
In the same conditions, the number of lines per unit length Nr is substantially proportional to the outside diameter φo of the inner layer 2 and is between 10 and 16 rows per 100 mm.
Some of the above parameters have been plotted in the chart of FIG. 3.
Finally, an outer layer 6 made of plastic or rubber locks the chain knitting thus formed on the surface of the hose, as occurs besides in all known flexible hose structures.
It is important to note that the inclination of the lines and rows of stitches can be slightly modified with respect to the above indicated values according to the material of the hose, its diameter, the type of knitting, the number of spools, the pitch of the rows and lines, and the type and/or count of the thread.

Claims (8)

1. Reinforced flexible hose, comprising:
at least one inner tubular layer (2) of plastic or rubber which has an outside (φe) diameter and a longitudinal axis (Y);
a chain knitted-type reinforcement layer (3), which has rows (4) of substantially parallel stitches and lines (5) of substantially parallel stitches, with respective stitch counts per unit length (Nm, Nr) in a longitudinal direction;
said knitted reinforcement layer (3) being provided in the form of a single tubular layer and being formed on the outer surface of said inner tubular layer (2) coaxially thereto;
said rows (4) of stitches and said lines (5) of stitches being substantially helical with respective longitudinal pitches (Pm, Pr) and inclinations (α, β) which are mutually opposite with respect to the longitudinal axis (Y), so as to eliminate the torque applied by-the pressure of the fluid inside it; and
an outer layer (6) which is superimposed on said reinforcement layer (3) to protect it;
characterized in that the longitudinal pitch (Pr) of said lines (5) of stitches is substantially proportional to the square of the outside diameter (φo) of said inner layer (2).
2. Flexible hose according to claim 1, characterized in that the number of lines of stitches per unit length (Nr) is substantially directly proportional to the outside diameter (φo) of said inner layer (2).
3. Flexible hose according to claim 1, characterized in that the longitudinal pitch (Pm) of the rows of stitches is substantially constant and independent of the outside diameter (φo) of said inner layer (2).
4. Flexible hose according to claim 1, characterized in that said rows (4) and said lines (5) of substantially helical stitches have different inclination angles (α, β) whose sum is substantially constant and equal to, or slightly lower than, 90° as the value of the outside diameter (φo) of said inner layer (2) varies.
5. Flexible hose according to claim 4, characterized in that the angle of inclination (β) of the lines (5) of stitches is substantially proportional to the square root of the outside diameter (φo) of said inner layer (2).
6. Flexible hose according to claim 1, characterized in that in said inner layer (2) the outside diameter (φo) is between 12 and 27 mm and the inside diameter (φi) is between 10 and 32 mm.
7. Flexible hose according to claim 1, characterized in that the number of rows per unit length (Nm) is substantially constant as the outside diameter (φo) of said inner layer (2) varies, and is between 30 and 40 rows per 100 mm, with an average number of 35 rows per 100 mm.
8. Flexible hose according to claim 1, characterized in that the number of lines per unit length (Nr) is substantially proportional to the outside diameter (φo) of said inner layer (2) and is between 10 and 16 lines per 100 mm.
US13/295,084 1997-02-20 1997-04-25 Reinforced flexible hose Expired - Lifetime USRE43942E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/295,084 USRE43942E1 (en) 1997-02-20 1997-04-25 Reinforced flexible hose

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
IT97VI000031A IT1292955B1 (en) 1997-02-20 1997-02-20 STRUCTURE OF REINFORCED FLEXIBLE HOSE.
ITVI97A0031 1997-02-20
US13/295,084 USRE43942E1 (en) 1997-02-20 1997-04-25 Reinforced flexible hose
PCT/EP1997/002155 WO1997041719A2 (en) 1997-02-20 1997-04-25 Reinforced flexible hose
US09/367,519 US6199594B1 (en) 1997-02-20 1997-04-25 Reinforced flexible hose

Publications (1)

Publication Number Publication Date
USRE43942E1 true USRE43942E1 (en) 2013-01-29

Family

ID=11426278

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/295,084 Expired - Lifetime USRE43942E1 (en) 1997-02-20 1997-04-25 Reinforced flexible hose
US09/367,519 Ceased US6199594B1 (en) 1997-02-20 1997-04-25 Reinforced flexible hose

Family Applications After (1)

Application Number Title Priority Date Filing Date
US09/367,519 Ceased US6199594B1 (en) 1997-02-20 1997-04-25 Reinforced flexible hose

Country Status (12)

Country Link
US (2) USRE43942E1 (en)
EP (1) EP0960297B1 (en)
JP (3) JP2001511232A (en)
AT (1) ATE219825T1 (en)
AU (1) AU732003B2 (en)
DE (1) DE69713624T2 (en)
DK (1) DK0960297T3 (en)
ES (1) ES2179325T3 (en)
IL (1) IL130955A0 (en)
IT (1) IT1292955B1 (en)
PT (1) PT960297E (en)
WO (1) WO1997041719A2 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856815A1 (en) 1998-12-09 2000-06-15 Siemens Ag Method and device for braiding cables, cable cores and hoses.
ITPN20000030A1 (en) * 2000-05-18 2001-11-18 Uniflex Utiltime Spa FLEXIBLE HOSE, IN PARTICULAR FOR IRRIGATION
DE20010082U1 (en) * 2000-06-06 2001-07-19 REHAU AG + Co., 95111 Rehau tube
US20050120471A1 (en) * 2003-12-09 2005-06-09 Lim Howard T.S. Toilet system attached a multi-purpose hand held water sprayer
US20070051418A1 (en) * 2005-09-02 2007-03-08 Rowles Brian A Multilayer tubes
DE102006022675A1 (en) * 2006-05-16 2007-11-22 Bayerische Motoren Werke Ag Pressure hose, has carrier between core and outer corner, where reinforcing angle of carrier in armature area is arranged differently to reinforcing angle in central area such that total movement of hose in hose fitting area is minimized
IT1368875B (en) 2006-06-13 2009-12-30 Fitt Spa FLEXIBLE HOSE WITH NON-PHTHALIC PLASTICIZING ADDITIVES FOR THE TRANSPORT OF FOOD LIQUIDS
ITVI20060185A1 (en) 2006-06-16 2007-12-17 Fitt Spa FLEXIBLE TUBE IN THERMOPLASTIC MATERIALS WITHOUT LIQUID PLASTICIZING AGENTS
US7957698B2 (en) * 2008-03-11 2011-06-07 Mediatek Inc. Demodulator with output level calibration
ITVI20080188A1 (en) 2008-08-05 2010-02-06 Fitt Spa FLEXIBLE HOSE WITH METALLIC APPEARANCE.
KR20100033457A (en) * 2008-09-20 2010-03-30 정인선 Resin hose
AU2010247012A1 (en) 2009-05-12 2011-11-03 Fitt S.P.A. Reinforced flexible hose with high pressure strenght and method for its manufacturing
EP2375118B1 (en) 2010-04-08 2012-12-19 Fitt Spa Use of a thermoplastic PVC compound with vegetables fillers for manufacturing flexible hoses and method thereof
ITVI20100217A1 (en) * 2010-07-30 2012-01-31 Fitt Spa STRUCTURE OF FLEXIBLE HOSE WITH INTERLACED REINFORCEMENT
KR101283425B1 (en) * 2011-04-18 2013-07-08 권순일 Joint of pipe with earthquake-resistant forced constitution
US9945054B2 (en) 2011-06-24 2018-04-17 Federal-Mogul Powertrain, Llc High temperature resistant weft knit textile sleeve and method of construction thereof
DE102011108971A1 (en) * 2011-07-29 2013-01-31 Marcus Greger Flexible pipe for transmission of gases, liquids or solid material, has two resting threads that run with different orientations, where resting threads are connected with each other at intersection point in fixed manner
US9046201B1 (en) 2012-01-04 2015-06-02 Schieffer Co. International L.C. High pressure highly flexible, stable in length, thermoplastic hose and method of making the same
RU2649742C1 (en) 2013-11-27 2018-04-04 Селл-Фаст Сп. З О.О. Flexible hose
DE202015104050U1 (en) 2015-08-03 2016-11-04 Rehau Ag + Co Hose, in particular garden hose
IT201700002927A1 (en) * 2017-01-12 2018-07-12 Fitt Spa FLEXIBLE REINFORCED TUBE, AS WELL AS APPARATUS AND METHOD FOR REALIZING THE SAME
IT201700071472A1 (en) * 2017-06-27 2018-12-27 Fitt Spa ULTRALIGHT REINFORCED HOSE
AU201810541S (en) * 2017-09-20 2018-02-19 Fitt Spa Flexible pipe or hose of indefinite length
IT201900021978A1 (en) * 2019-11-22 2021-05-22 Fitt Spa FLAT FLEXIBLE HOSE MADE OF THERMOPLASTIC ELASTOMER FOR THE TRANSPORT OF FLUIDS

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253618A (en) * 1963-10-28 1966-05-31 Raychem Corp Reinforced article and process
US3682202A (en) * 1970-01-22 1972-08-08 Goodyear Tire & Rubber Reinforced hose
US3921674A (en) * 1974-03-18 1975-11-25 Dayco Corp Hose construction and method of making same
US4044799A (en) * 1968-04-29 1977-08-30 The Gates Rubber Company Cellular wall hose and method for making same
US4091063A (en) * 1974-07-11 1978-05-23 Dayco Corporation Hose construction and method of making same
US4308896A (en) * 1979-12-31 1982-01-05 Burlington Industries, Inc. Fabric reinforced hose
DE3408241A1 (en) * 1983-03-28 1985-01-31 VEB Gummiwerke Thüringen, DDR 5812 Waltershausen Bottle closure made of flexible plastic
DE3408251A1 (en) * 1984-03-07 1985-09-12 Phoenix Ag, 2100 Hamburg Hose of rubber or rubber-like material
US4553568A (en) * 1983-12-19 1985-11-19 The Goodyear Tire & Rubber Company Shape restoring hose
US4679599A (en) * 1985-02-08 1987-07-14 The Gates Rubber Company Safety hose
US4989643A (en) * 1988-12-20 1991-02-05 Chase-Walton Elastomers, Inc. High performance composite hose
US5264262A (en) * 1991-08-30 1993-11-23 Tokai Rubber Industries, Inc. Refrigerant transporting hose having inner tube including resin layer
US5477888A (en) * 1993-05-13 1995-12-26 Fitt Spa Chain mesh network hose

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2151652A1 (en) * 1995-02-10 1996-08-11 Douglas Bruce Wood Helically knit hose product

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253618A (en) * 1963-10-28 1966-05-31 Raychem Corp Reinforced article and process
US4044799A (en) * 1968-04-29 1977-08-30 The Gates Rubber Company Cellular wall hose and method for making same
US3682202A (en) * 1970-01-22 1972-08-08 Goodyear Tire & Rubber Reinforced hose
US3921674A (en) * 1974-03-18 1975-11-25 Dayco Corp Hose construction and method of making same
US4091063A (en) * 1974-07-11 1978-05-23 Dayco Corporation Hose construction and method of making same
US4308896A (en) * 1979-12-31 1982-01-05 Burlington Industries, Inc. Fabric reinforced hose
DE3408241A1 (en) * 1983-03-28 1985-01-31 VEB Gummiwerke Thüringen, DDR 5812 Waltershausen Bottle closure made of flexible plastic
US4553568A (en) * 1983-12-19 1985-11-19 The Goodyear Tire & Rubber Company Shape restoring hose
DE3408251A1 (en) * 1984-03-07 1985-09-12 Phoenix Ag, 2100 Hamburg Hose of rubber or rubber-like material
US4679599A (en) * 1985-02-08 1987-07-14 The Gates Rubber Company Safety hose
US4989643A (en) * 1988-12-20 1991-02-05 Chase-Walton Elastomers, Inc. High performance composite hose
US5264262A (en) * 1991-08-30 1993-11-23 Tokai Rubber Industries, Inc. Refrigerant transporting hose having inner tube including resin layer
US5477888A (en) * 1993-05-13 1995-12-26 Fitt Spa Chain mesh network hose

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
European Patent Application 0623776 Rinaldo Mezzalira, Sep. 1994. *
European Patent Application 0726416 Douglas Bruce Wood, Aug. 1996. *

Also Published As

Publication number Publication date
EP0960297B1 (en) 2002-06-26
AU732003B2 (en) 2001-04-12
ES2179325T3 (en) 2003-01-16
AU2638897A (en) 1997-11-26
WO1997041719A3 (en) 1997-12-24
JP2013166375A (en) 2013-08-29
DE69713624D1 (en) 2002-08-01
IL130955A0 (en) 2001-01-28
US6199594B1 (en) 2001-03-13
JP2010100062A (en) 2010-05-06
WO1997041719A2 (en) 1997-11-13
DK0960297T3 (en) 2002-10-14
IT1292955B1 (en) 1999-02-11
DE69713624T2 (en) 2003-02-06
PT960297E (en) 2002-11-29
EP0960297A2 (en) 1999-12-01
JP2001511232A (en) 2001-08-07
ATE219825T1 (en) 2002-07-15
ITVI970031A1 (en) 1998-08-20

Similar Documents

Publication Publication Date Title
USRE43942E1 (en) Reinforced flexible hose
EP0623776B1 (en) Mesh, network hose
CN106170588B (en) Knitting sleeve do not twist together, reelable and its construction method
US4522235A (en) Hose structure
CA2802327C (en) Flexible hose structure with an interlaced reinforcement
JP5835323B2 (en) Flexible hose with knit reinforcement and method of manufacturing the same
CN103109008A (en) Non-kinking self-wrapping woven sleeve and method of construction thereof
US4679599A (en) Safety hose
EP0032352B1 (en) Hose structure
CA1045058A (en) Hose structure
US4100770A (en) Process and nonraveling knit tubular products having axial stretch
US4071647A (en) Rubber goods
US6082144A (en) Circular warp knit packing material
EP1156252B1 (en) Flexible hose, in particular for watering applications
EP0726416A1 (en) Hose having knitted reinforcement
RU2172444C2 (en) Armored flexible hose
GB2369170A (en) Hose with elastomeric and textile layers
RU2649742C1 (en) Flexible hose
CA1154390A (en) Hose structure
AU2012101840A4 (en) Flexible Hose Structure with a Interlaced Reinforcement
DE2339475C3 (en) Suction and discharge hose
JPH0448994B2 (en)
WO2001038624A1 (en) Compression packing products using interwarp knit construction techniques