CA1087532A - Hose construction and method of making same - Google Patents
Hose construction and method of making sameInfo
- Publication number
- CA1087532A CA1087532A CA296,017A CA296017A CA1087532A CA 1087532 A CA1087532 A CA 1087532A CA 296017 A CA296017 A CA 296017A CA 1087532 A CA1087532 A CA 1087532A
- Authority
- CA
- Canada
- Prior art keywords
- tube
- hose construction
- hose
- strip
- set forth
- 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
Links
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
- F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
- F16L11/115—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements not embedded in the wall
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/24—Hoses or pipes; Hose or pipe couplings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A reinforced flexible outwardly convoluted smooth bore hose con-struction and method of making the same are provided herein. The hose con-struction comprises a thermoplastic inner tube having a smooth cylindrical inside surface defining the smooth bore of the hose construction and rein-forcement disposed in helically coiled relation around and against the tube free of embedment in such tube thereby defining the outwardly convoluted configuration of the hose construction. The reinforcement means consists of a rectangular thermoplastic strip portion having an enlarged, substantially semicircular bead portion in the central portion thereof. The inner tube has a wall thickness which assures flexibility yet the reinforcement enables carrying of a fluid in the hose construction at a substantial differential pressure from ambient pressure. Moreover, the hose construction is of suf-ficiently low cost to enable wide usage.
A reinforced flexible outwardly convoluted smooth bore hose con-struction and method of making the same are provided herein. The hose con-struction comprises a thermoplastic inner tube having a smooth cylindrical inside surface defining the smooth bore of the hose construction and rein-forcement disposed in helically coiled relation around and against the tube free of embedment in such tube thereby defining the outwardly convoluted configuration of the hose construction. The reinforcement means consists of a rectangular thermoplastic strip portion having an enlarged, substantially semicircular bead portion in the central portion thereof. The inner tube has a wall thickness which assures flexibility yet the reinforcement enables carrying of a fluid in the hose construction at a substantial differential pressure from ambient pressure. Moreover, the hose construction is of suf-ficiently low cost to enable wide usage.
Description
~ is inv~ntion relates lo reinEorcec1 Elexib:Le outwardly convolutecl smooth bore hose constructions, and me-thoc1s for mak~1g -the s~lme.
E`lexible elastc~ ric smooth bo;re hose construetions or h~es æ e wideLy used t~hl-oucJhout indus-try to convey varic)us types o 1uic1s. Ilowever, each applica-tion usually has the need for a particular type of hose c~nstrue-tion. For exclmple, in vacuum clec~ning appara-tlls the need exists or a flexi-ble vacuum hose which has a smooth inside surface free of inside convolutions to prev~nt air turbuLance and the trapping and accumulAtion oE dirt, ancl the like, within the inside convolutions while having a convDluted outer por-tion which provides reinforc~lment for khe hose and enables eas:ier gliding ofsuch hose over a floor, earpet, or the like.
Many of the previously proposed vacuum hoses are made of ~elieally wound strips to ass-1re each of such hoses has op-timum flexibility; however, inherently each hose made frc~n such a helically ~und strip has an inside surface which has numerous m side convolutions whieh cause turbulanee and trap dirt as mentioned above. ~thers of previously proposed vacuum hoses employ a cc~paratively thick tube having a smooth kore, however, inherently a hose using a comparatlvely thiek tube has limited flexibility. Still ;
others of previously proposed vaeuum hoses are too expensive to gain wide
E`lexible elastc~ ric smooth bo;re hose construetions or h~es æ e wideLy used t~hl-oucJhout indus-try to convey varic)us types o 1uic1s. Ilowever, each applica-tion usually has the need for a particular type of hose c~nstrue-tion. For exclmple, in vacuum clec~ning appara-tlls the need exists or a flexi-ble vacuum hose which has a smooth inside surface free of inside convolutions to prev~nt air turbuLance and the trapping and accumulAtion oE dirt, ancl the like, within the inside convolutions while having a convDluted outer por-tion which provides reinforc~lment for khe hose and enables eas:ier gliding ofsuch hose over a floor, earpet, or the like.
Many of the previously proposed vacuum hoses are made of ~elieally wound strips to ass-1re each of such hoses has op-timum flexibility; however, inherently each hose made frc~n such a helically ~und strip has an inside surface which has numerous m side convolutions whieh cause turbulanee and trap dirt as mentioned above. ~thers of previously proposed vacuum hoses employ a cc~paratively thick tube having a smooth kore, however, inherently a hose using a comparatlvely thiek tube has limited flexibility. Still ;
others of previously proposed vaeuum hoses are too expensive to gain wide
2~ usage. Accordingly, previously proposed vacuum hoses are deficient because of one or more of the above-mentioned items.
It i5 an objeet of one aspect of this invention to provide a sim-ple and economical hose construetion partieularly adapted for vaeuum appara-tus whieh overcomes the above-mentioned defleiencies.
An ohjeet of ano-ther aspect of this inven-tion is to provide a re-inforced flexible hose construetion of the eharacter mentioned which employs a co~aratively thin-walled elastomerie inne~ tube which has a sm~oth inside surface and which has helically wound reinforeing means disposed around the inner tube providing the re~uired reinforeement for ~he overall hose eon struetion yet without impairing the ~lexibility of such hose c~nstruction.
: . . .
. ,, .. . ., , :: , , , , .. , , -53~
An ob~ect of yet another nsptc:t of t~l:Ls Lnvent-ion is to prov:Lde a reinforced flexible o~twar~lly convol.llttd c;mooth bore hosc constrllct:lon ~here:Ln such hose construct:Lon compri.ses a tllermopln~stlc :Lnner tube havlng a smooth inside surfflce clefining the smooth bore ~herein and reL~orc~d dis-posed in helically co-Lled rela~lon aro~lrld an(l against the tube free of em-bedment ln tlle tube with the reLnEorcement hav:l.ng at :Leas~ a portion there-of made of a thermoplastic material and with the reinforcement defining the outwardly convoluted configuration of the hose construct:Lon; and, the lnner tube has a wall thickness which assures flexibi]ity wlth the reinEorcelllent enabling carrying a fluid in the hose construction at a substantially dif-ferential pressure from ambient pressure.
An object of still another aspect of this invention is to provide an improved method of making a hose construction of the character mentioned.
By one aspect of this invention, a reinforced flexible outwardly convoluted smooth bore hose construction is provided comprising a thermo-plastic inner tube having a smooth cylindrical inside surface defining the smooth bore, and reinforcing means disposed in helically coiled relation around and against the tube.free of embedment in the tube, thereby defining :
the outwardly convoluted configuration of the hose construction, the rein-forcing means consisting of a rectangular thermoplastic strip portion having an enlarged, substantially semicircular bead portion in the central portlon thereof, the tube having a wall thickness which assures flexibility and the reinforcing means providing reinforcement enabling carrying of a fluid in the hose construction at a substantial differential pressure from ambient pressure.
By a variant thereof, the hose construction further includes means bonding the strip against the tube.
, By another aspect of this invention, a reinforced flexible out-wardly convoluted smooth bore hose construction is provided comprising, a thermoplastic inner tube having a smooth cylindrical inside surface defining . . . , ... ~ . . . . .
: . : , . . .
~7S3Z
the sloooth bore, nnd r~lnrorclng ne;lllg dtspusecl -In helic~lly colled rell~t~on rol~nd alld ngainst the tllbe free of elnbedinent Ln the t~lbe, tllereby defLIllllg the outt~rdly convolllted conflgllr~ lon of the hose collstructloll, the rein-~orcing means havlng at least a portLon theIeoE ma(le of fl thermOplflStlC
material and comprisLng a relnrorclng Inom`ber di~Yposed in hel-lcally coiled re]at-lon aro-llld ~nd agalnst tlle ~ube, the relnforcillg member having an o-lter portion definlng the portion made of a thermoplastic material, and a strip helically wrapped around the member and bonded to the tube, holdlng the mem-ber against the tube, wherein the tube has a wall thickness ro-lghly equal to the maximum thickness of the reinforcing member.
By one variant thereof, the reinforcing nlember is precoiled to an inside diameter substantially equal to an outside diameter of the tube, and the hose construction is in a heat set condition9 which assures retention of the smooth bore.
By a variation, the reinforcing member is comprised of a metallic wire.
By another variation, the reinforcing member is in the form of a metallic wire having a plastic sleeve disposed therearound, and the hose further includes means bonding the plastic sleeve against the tube.
By a further variation the bonding means comprises adhesive means.
By yet another variation the bonding means comprises a heat fused area between the outside surface of the sleeve and the tube.
By a further variant, the strip is in the form of a plastic tape.
By a variation thereof, the plastic tape is helically wrapped so that it extends over a plurality of adjoining turns of the reinforcing mem- ;
ber, and the outwardly con~oluted configuration in the hose construction is defined by a double thickness of the tape disposed around each helical turn of~the reinforcing member.
~ By yet another variation, the tape is a single thicknes6 tape hav-:
- 4~
753~ .
ing opposed edges ar~ange(l Ln abuttlrlg relatLon.
By a further varlallt, the strlp ls Ln tlle Eorm of a prefc1rmed plastic strlp having a rollghly selnLcLrcular cross-sectiona] con~:lguration ad~oined at opposite ends thereoE by out~clrdly taperLIlg extensions.
By ~nother aspect oE this Lllventlon, a Tnetllod :Ls prov:Lded for mak-ing a reinforced Elexlble outwardly col~voluted smooth bore hose construction the method comprising the steps of: for~ing a thermoplastic inner tube hav-ing a smooth cylindrical inside surEace which defines the smooth cylindrical bore; and disposing reinforcing means in heiically coiled relation around and against the tube free of embedment in the tube,thereby defining the out-wardly convoluted configuration of the hose construction, the reinforcing means having at least a portion thereof made of a thermoplastic material, the reinforcing means consisting of a rectangular thermoplastic strip por-tion having an enlarged substantially semicircular bead portion in the cen-tral portion thereof, the tube having a wall thickness which assures flexi-bility and the reinforcing means providing reinforcement enabling carrying of a fluid in the hose construction at a sub~stantial differential pressure ;~
from ambient pressure;
By a variant thereof the method includes the further step of bonding the strip against the tube, By a further variant, the disposing step comprises: helically coil- ;
ing a reinforcing member around and against the tube, the reinforcing mem- ;
ber having an outer portion comprising the portion made of a thermoplasti~c material; and helically wrapping a strip around the member to hold the mem ber against the tube.
By a variation thereof, the helically coiling step comprises:
precoiling the member so that it has an inside diameter substantially equal to an outside diameter of the tube.
"~ ~ ~
,..~/
.
.
:,: :.: ~ .: :
: :: - , 53;~ ~
By another vartation, the method Lncllldes the further step of heat setting the hose constr~lct:i.on to asYllre retentlon of the smooth cyl:Ln-. dr:ical bore.
In the accompanyLng draw:ing, FIG. 1 is a prLmar:Lly schematic prese~ltntLon illustrating the 1~7~3~
generally by the reference numeral 20 ~nd such hose construction 20 may be made utillzing any sllltable technLque known :Ln the art and preferably made utillzlng the method illustrated ln FIG. l of the drawing and Cuch method is designated ~enerally by the reference numeral 21. The hose construction 20 i5 a reinforced comparatively highly flexible hose construction whlch has a smooth cylindrical bore 22 and an outwardly convoluted configuration as indicated by the plurality of outwardly proJecting convolutions 23.
The hose construction 20 is made primarily of one or more elas-tomeric materials and preferably thermoplastic materials and comprises a thermoplastic inner tube 24 having a smooth in~ide surface, also designated 22, which defines the smooth bore 22 of the overall hose construction. The hose construction 20 also has reinforcing means designated generally by the reference numeral 25 disposed in helically coiled relation around and against the inner tube 24 in a non-embedded manner~ i.e., free of embedment in the tube 24, as will be readily apparent at a few representative loca-tions 26; and, the manner in which the reinforcing means 25 is provided to give the hose construction optimum reinforcement free of embedment in the lnner tube 24 will be readily apparent from the following description.
The inner tube 24 has a comparatively small wall thickness 30, as compared with the inside diameter of the . . ~ . . . : . . , : ~ - , . :
tube 24, whlch ~ssllres optlm~D fle~ibilLty for the overall hosc constructlon.
Further, the reinforcing means 25 enables carrying of fl.lid in the hose construction 20 without lmpalring the -flexlbility thereof yet at a substan-tial dlfferentlal pressure from ambient pressur~. Accordin~ly, the hose construction 20 is capable of carrying a Eluld, e.g. air, under partial vacuum and is also capable of carrying a fluid under substant1al pressure.
The fluid whlch may be contained or conveyed ln hose construction 20 may be in the form of a gas, a liquid, or a combination of gas and liquid.
The reinforcing means 25 of the hose construction 20 is in the form of an unstressed reinforcing member 31 disposed in helically coiled relation around and against the outside surface 32 of the tube 24 and a strip 33 helically wrapped around the member 31 and holding such member firm-ly against the tube 24. The member 31 and strip 33 are disposed such that nelther of these components is embedded in the tube and these components are disposed to assure that there is no inward bulging of the ilmer tube 24.
It will be app~eciated that the reinforcing means 25 defined by the rein-forcing member 31 and the strip 33 defined the outwardly con~oluted con- ~
figuration of the overall hose construction 20. ~;
The reinforcing member 31 of this example is in the form of a 2Q wire, preferably a metal wire 34 which has a sleeve 35 prefarably made of a thermoplastic material disposed th~rearound and the thermoplastic material of sleeve 35 is compatable with the thermoplastic material employed to make the lnner tube 24 whereby th= memb~r 31 may be : ~:
. ' . . - ., . -: . :. . ~ . .
suitably bonded agnll~st the lnner t~be 24 by heat: fuslon or slJitable ad-hesive ~ean~ as lndicated by th~ bondln~ means 36 between th~ c~le~ve 35 and the inner tube 24 at a few representative locatlons ln FIG. 2.
The strip 33 is an elastomeric strip prefcrably mada of a thermo-plastic ~terlal. The strip 33 has a width indicated at 37 whi~ch enables each helical turn of such strip to be disposed about a plurality of two .. immediately adjacent turns of the reinforcing member 31.
The reinforcing member 31 18 a preformed helical coil which has been pre-coiled so that the resulting helix has an inside diameter sub-stantiall~ equal to the outside diameter 40 of the inner tube 24. Further, the inner tube 24 is a heat set inner tube and the portions of components 31 and 33 capable of being heat set are also heat set. Accordingly, thc pre-coiled reinf~rcing member 31 cooperating primarily with the heat set inner ~
tube 24 assure retention of tha smooth bore of the overall hose constructio~ .
20; and, such smooth bore or inside surface 22 is free of inward bulges or .
inward convolutions to assure unrestricted fluid flow in a non-turbulent manner.
As indicated earlier, the outer convolutions of the hose construc-tion 20 are defined by the reinforcing member 31 co.operatin~ with the strip .
33. Further, it will be seen that the inner tube 24 has minimum thickness 30 which is approximately equal to the maximum thickness of the reinforcing member 31 and in this exemplary embodiment is roughly equal to the diameter of the sleeve 35. The hose construction 20 is preferably made employing the method 21 showl~ in FIG. l whlch ls a con.inoou: method.
1:
~ 7~i3~
In such method a plurality oE rectilLn~ar mandrels, indicatecl s~hematlcally by arrows 43, of substantial length gen~rally of the ordcr o~ 50 feet, and more, are moved continuously through various stations. In particular, each mandrel 43 ls moved through a crossh~ad extrusion apparatus 44 of known construction and operation where a thin-walled tube, also designated 24, i9 extruded therearound as a seamless tube to define a tube-covered mandrel 45.
The tube covered mandrel 45 is suitably cooled in the area indl-cated at 46 and moved into a wire coiling station 47 where the reinforcing member 31 is pre-coiled in a helical configuration so that the inside dia-meter of the helical coil is substantially equal to the outside diameter 40 of the inner tube 24. Any suitable apparatus known in the art may be employed for this purpose and such apparatus is employed continuously to apply the reinforcing member around the tube-covered mandrel 45 so-that the reinforcing member 31 is disposed agains~ the outside surface 32 of the tube 24 in a non-embedding manner.
The tube-covered mandrel 45 wi-hh thc reinforcing member 31 dis-posed therearound is then moved to a wrapping station 50 where the strip 33 is disposed therearound; and, any suitable known apparatus may be used for this purpose. The resulting construction is, in essence, the hose con-struction 20 illustrated in FIG. 2, and such construction emerges the wrapping station at 52.
The hose construction 20 is then moved into an oven 54 in a con~
tinuous manner causing heat setting thereof and in particular heat setting such that the inner tube 24, in essence, rigidifies and retains its smooth bore 22 free ~,, .
.. ~ . . .
z oE convolu~Lons, in~ rcl b~iLgcs, ol: the Like. S~ taneously, w:i,th -the heat-setting action ~e oven 5~ provic`les h~t boncL~ly or Eus:ion o~ the sleeve 35 ac3ainst the outslde surEace 32 oE the .inner tuve 2~ clS shcwn at 36 ar~l heat fusion oE the strip 33 against such s~lrface 32.
The now hP,at set hose constmction is suitcibly ccx~lecl at a cooLing s~tion 55 -to deEine -the c,~pleted hose construc-tion 20; and, the c~mpleted hose cons-truction ls o,E ~xtendecl length over a plurality of ~nclrels whereby i-t is then cut at opposite ends of each ~andrel ~3 to define such hc~se con-struction 20 corresponding in length to its manc,lrel. I~ach ma~drel 43 is then suitably re~ioved frc~n wi-thin i~s length of hose construction 20 using techniclues which a~-e known in the ar-t and each of such rem4ved mandrels is returned as indicated by the arrow 56 upstre~n of the extrusion apparatus 44 to repeat the formation of a hose c~nstruction 20 therearound in a continu-ous ~anner and as described akove.
Other exemplary e~kodiments of the hose construction of other aspects of this invention are illus-trated in FIGS. 3~ 4 and 5 of the clrawing.
The hose cons-tructions illustrated in FIGS. 3, 4, and 5 are very similar to the hose construction ?; there~ore, such hose constructic~s will ke desig-nated generally by the reference numerals 20A, 20B, and 2GC respectively and com~onen-t parts of each hose construction 20A, 20B, and 20C whic.h are sili-lar to corresponding parts of the hose construction 20'will be designated by the same reference numeral as in the hose cons-truction 20 also followed ' by the associated let-ter designation either A, B, or C and not describe~
again in detail.
The hose construction 20 has an inner tube 24A, .
: . . . . .
~.~ 517~3~
a reinforcing member 31A, and a strlp 33A. The strip 33A is h~llcally wound so that each turn of such strip 33A :Ls dlsposed around and aga.lnst an associ-ated correspondlng helical turn of the member 3:LA; and, the strip 33A has oppos~d side edges 60A disposed such that ~ach turn has each of lts opposed side edges disposed in abutting rclation with an edge of an adjoining turn as shown at 61A. In the hose construction 20A the o~ltwardly convoluted configuration of such hose construction is def:Lned by th~ helically coiled reinforcing member 31A cooperating with the single thickness strip 33A.
With this construction as each turn of the strip 33 is viewed in cross sec-tion it will be seen that it has a U-shaped center portion 62A ad~oined at the opposite edges of the U-shaped portion by lateral extensions 63A. The .
member 3LA is disposed with the U-shaped portion 62A. ~ ~:
The hose construction 20B has an inner tube 24B, reinforcing member 31B and strip 33B; however, the strip 33B thereof is in the form of a preformed strip which when viewed in cross sertion or from an end thereof has a roughly semicircular central portion 64B adjoined at opposite end edges thereof by outwardly tapering extensions 65B. The: length of each ex-tension is such that uncovered spaces 66B are defin~d between ad~oining turns of the strip 33B. :~
Hose construction 20C of FIG. 5 iB also comprised of an inner : tube 24C and has the reinforcing means 25C thereof in the form of a single member designated generally by the reference numeral 67C. The member 67C ~ -~
is helically wrapped around and against the inner tube 24C~ The member 67C
is defined by a rectangular strip portion 70C which has an enlarged sub- -stantially semicircular bead portion 71C
'~,'" , .`: . , .
O, ~
.,. .~ .
: : . .: ,. - . : :
S3~ ~
.
in the cen~ral portion thereoE and the ~ ber 67C ls preferably made cn-tirely of a thermoplastic material.
T~le strip portion 70C also has oppose~d end edges 72C and when the me~ber 67C is helically wound around the inner tube 24C the end edges 72C
oE each helical turn of the str:Lp portion 70C are dlspo3ed Ln abutting relation with adjoining end edges 72C of ad~oinLng turns of each strip.
The strip portion 70C and thus member 67C is bonded against the outside sur-face 32C of the tube 24C by heat fustion or adhesive means as shown at 73C.
It will be apprieciated that the enlarged semi-circular bead portions 71C
of the member 67C when helically would around the inner tube 24C define the outer conv~lutions of the hose construction 20C.
Each hose construction 20A, 20B, and 20C is preferably defined in a similar manner and basically in a similar manner as the hose construc-tion 20 and each may be defined employing the method 21 disclosed in FIG. 1.
Further, each reinforcing member 31A, 31B, and 67C is pr~ferably bonded against the outside surface of its associated inner tube by heat fusion.
However, it will be appreciated that suitable ad~esive means in the form of an adhesive, solvent, Qr the l~ke may be provided where each reinforcing member contacts its inner tube to adhesively bond the reinforcing member 20- and its associated tube.
Each hose construction 20, 20A, and 20B is shown employing an associated reinforcing member 31~ 31A, and 31B respectively which has a central metal wlre with a preferably thermoplastic sleeve therearound and the wire of each member may be simply a reinforcing wire or such wire may be in the "`
' ' .
". ~ .
- 11 -- . ' - .. - ;- . . - ~
. , . : ,; ~ ~ : . . .. ,: , .. .
S3;2 form of an electrical conductor which may be used wlth a ground wire, not shown, and for a purpose wh:Lch is well known in the art. ~lso, lnstead of having a single wire disposed helically around the inner tube a pl-lrality of insulating sleeve covered clectrical wires (such as two wires) may be hel:L-cally disposed in position around the associate.d inner tube for the purpose of carrying electricity as well as providing reinf.orcement and as :Ls well known in the art. The electrical wires are also helically wrapped with an outer strip or tape to arrive at a hose construction similar to the hose construction 20.
The strip -disposed around the reinforcing members 31, 31A, or 31B
may also be in the form of a thermoplastic strip which may also be bonded in position by heat Eusion or suitable adhesive means.
Each exemplary hose constructlon disclosed herein has optimum flexibility, has a smooth inside surface free of inward convolutions or bul~
ges, and has an inner tube of minimum wall thickness for optimum flexibility yet because of the utilization of a helically coiled reinforcing menas dis- ~;
posed around the inner tube in a non-imbedding manner each of such hose ~ .
constructions is capable of containing and conveylng fluid either under partial vacuum or under substantial pressure. In addition, the outwardly projecting convolutiong of each hose construction provide spaced corruga- :
tions enabling sliding of each hose construction over any surface with .
minimum friction and wear. :
Reference has been made in this disclosure to the utili~ation of a thermoplastic material to define each lnner tube, each sleeve disposed ~.
around each wire of each reinforcing member, and the reinforcing means 67C .
of the hose . . , ... , . ,. : : ..
s3æ
construction 20C; and, :It i5 to be und~rstood that any suitable thcrmo-plastlc materlal known ~in the art may be used for this p~rpose.
, .
.
.
It i5 an objeet of one aspect of this invention to provide a sim-ple and economical hose construetion partieularly adapted for vaeuum appara-tus whieh overcomes the above-mentioned defleiencies.
An ohjeet of ano-ther aspect of this inven-tion is to provide a re-inforced flexible hose construetion of the eharacter mentioned which employs a co~aratively thin-walled elastomerie inne~ tube which has a sm~oth inside surface and which has helically wound reinforeing means disposed around the inner tube providing the re~uired reinforeement for ~he overall hose eon struetion yet without impairing the ~lexibility of such hose c~nstruction.
: . . .
. ,, .. . ., , :: , , , , .. , , -53~
An ob~ect of yet another nsptc:t of t~l:Ls Lnvent-ion is to prov:Lde a reinforced flexible o~twar~lly convol.llttd c;mooth bore hosc constrllct:lon ~here:Ln such hose construct:Lon compri.ses a tllermopln~stlc :Lnner tube havlng a smooth inside surfflce clefining the smooth bore ~herein and reL~orc~d dis-posed in helically co-Lled rela~lon aro~lrld an(l against the tube free of em-bedment ln tlle tube with the reLnEorcement hav:l.ng at :Leas~ a portion there-of made of a thermoplastic material and with the reinforcement defining the outwardly convoluted configuration of the hose construct:Lon; and, the lnner tube has a wall thickness which assures flexibi]ity wlth the reinEorcelllent enabling carrying a fluid in the hose construction at a substantially dif-ferential pressure from ambient pressure.
An object of still another aspect of this invention is to provide an improved method of making a hose construction of the character mentioned.
By one aspect of this invention, a reinforced flexible outwardly convoluted smooth bore hose construction is provided comprising a thermo-plastic inner tube having a smooth cylindrical inside surface defining the smooth bore, and reinforcing means disposed in helically coiled relation around and against the tube.free of embedment in the tube, thereby defining :
the outwardly convoluted configuration of the hose construction, the rein-forcing means consisting of a rectangular thermoplastic strip portion having an enlarged, substantially semicircular bead portion in the central portlon thereof, the tube having a wall thickness which assures flexibility and the reinforcing means providing reinforcement enabling carrying of a fluid in the hose construction at a substantial differential pressure from ambient pressure.
By a variant thereof, the hose construction further includes means bonding the strip against the tube.
, By another aspect of this invention, a reinforced flexible out-wardly convoluted smooth bore hose construction is provided comprising, a thermoplastic inner tube having a smooth cylindrical inside surface defining . . . , ... ~ . . . . .
: . : , . . .
~7S3Z
the sloooth bore, nnd r~lnrorclng ne;lllg dtspusecl -In helic~lly colled rell~t~on rol~nd alld ngainst the tllbe free of elnbedinent Ln the t~lbe, tllereby defLIllllg the outt~rdly convolllted conflgllr~ lon of the hose collstructloll, the rein-~orcing means havlng at least a portLon theIeoE ma(le of fl thermOplflStlC
material and comprisLng a relnrorclng Inom`ber di~Yposed in hel-lcally coiled re]at-lon aro-llld ~nd agalnst tlle ~ube, the relnforcillg member having an o-lter portion definlng the portion made of a thermoplastic material, and a strip helically wrapped around the member and bonded to the tube, holdlng the mem-ber against the tube, wherein the tube has a wall thickness ro-lghly equal to the maximum thickness of the reinforcing member.
By one variant thereof, the reinforcing nlember is precoiled to an inside diameter substantially equal to an outside diameter of the tube, and the hose construction is in a heat set condition9 which assures retention of the smooth bore.
By a variation, the reinforcing member is comprised of a metallic wire.
By another variation, the reinforcing member is in the form of a metallic wire having a plastic sleeve disposed therearound, and the hose further includes means bonding the plastic sleeve against the tube.
By a further variation the bonding means comprises adhesive means.
By yet another variation the bonding means comprises a heat fused area between the outside surface of the sleeve and the tube.
By a further variant, the strip is in the form of a plastic tape.
By a variation thereof, the plastic tape is helically wrapped so that it extends over a plurality of adjoining turns of the reinforcing mem- ;
ber, and the outwardly con~oluted configuration in the hose construction is defined by a double thickness of the tape disposed around each helical turn of~the reinforcing member.
~ By yet another variation, the tape is a single thicknes6 tape hav-:
- 4~
753~ .
ing opposed edges ar~ange(l Ln abuttlrlg relatLon.
By a further varlallt, the strlp ls Ln tlle Eorm of a prefc1rmed plastic strlp having a rollghly selnLcLrcular cross-sectiona] con~:lguration ad~oined at opposite ends thereoE by out~clrdly taperLIlg extensions.
By ~nother aspect oE this Lllventlon, a Tnetllod :Ls prov:Lded for mak-ing a reinforced Elexlble outwardly col~voluted smooth bore hose construction the method comprising the steps of: for~ing a thermoplastic inner tube hav-ing a smooth cylindrical inside surEace which defines the smooth cylindrical bore; and disposing reinforcing means in heiically coiled relation around and against the tube free of embedment in the tube,thereby defining the out-wardly convoluted configuration of the hose construction, the reinforcing means having at least a portion thereof made of a thermoplastic material, the reinforcing means consisting of a rectangular thermoplastic strip por-tion having an enlarged substantially semicircular bead portion in the cen-tral portion thereof, the tube having a wall thickness which assures flexi-bility and the reinforcing means providing reinforcement enabling carrying of a fluid in the hose construction at a sub~stantial differential pressure ;~
from ambient pressure;
By a variant thereof the method includes the further step of bonding the strip against the tube, By a further variant, the disposing step comprises: helically coil- ;
ing a reinforcing member around and against the tube, the reinforcing mem- ;
ber having an outer portion comprising the portion made of a thermoplasti~c material; and helically wrapping a strip around the member to hold the mem ber against the tube.
By a variation thereof, the helically coiling step comprises:
precoiling the member so that it has an inside diameter substantially equal to an outside diameter of the tube.
"~ ~ ~
,..~/
.
.
:,: :.: ~ .: :
: :: - , 53;~ ~
By another vartation, the method Lncllldes the further step of heat setting the hose constr~lct:i.on to asYllre retentlon of the smooth cyl:Ln-. dr:ical bore.
In the accompanyLng draw:ing, FIG. 1 is a prLmar:Lly schematic prese~ltntLon illustrating the 1~7~3~
generally by the reference numeral 20 ~nd such hose construction 20 may be made utillzing any sllltable technLque known :Ln the art and preferably made utillzlng the method illustrated ln FIG. l of the drawing and Cuch method is designated ~enerally by the reference numeral 21. The hose construction 20 i5 a reinforced comparatively highly flexible hose construction whlch has a smooth cylindrical bore 22 and an outwardly convoluted configuration as indicated by the plurality of outwardly proJecting convolutions 23.
The hose construction 20 is made primarily of one or more elas-tomeric materials and preferably thermoplastic materials and comprises a thermoplastic inner tube 24 having a smooth in~ide surface, also designated 22, which defines the smooth bore 22 of the overall hose construction. The hose construction 20 also has reinforcing means designated generally by the reference numeral 25 disposed in helically coiled relation around and against the inner tube 24 in a non-embedded manner~ i.e., free of embedment in the tube 24, as will be readily apparent at a few representative loca-tions 26; and, the manner in which the reinforcing means 25 is provided to give the hose construction optimum reinforcement free of embedment in the lnner tube 24 will be readily apparent from the following description.
The inner tube 24 has a comparatively small wall thickness 30, as compared with the inside diameter of the . . ~ . . . : . . , : ~ - , . :
tube 24, whlch ~ssllres optlm~D fle~ibilLty for the overall hosc constructlon.
Further, the reinforcing means 25 enables carrying of fl.lid in the hose construction 20 without lmpalring the -flexlbility thereof yet at a substan-tial dlfferentlal pressure from ambient pressur~. Accordin~ly, the hose construction 20 is capable of carrying a Eluld, e.g. air, under partial vacuum and is also capable of carrying a fluid under substant1al pressure.
The fluid whlch may be contained or conveyed ln hose construction 20 may be in the form of a gas, a liquid, or a combination of gas and liquid.
The reinforcing means 25 of the hose construction 20 is in the form of an unstressed reinforcing member 31 disposed in helically coiled relation around and against the outside surface 32 of the tube 24 and a strip 33 helically wrapped around the member 31 and holding such member firm-ly against the tube 24. The member 31 and strip 33 are disposed such that nelther of these components is embedded in the tube and these components are disposed to assure that there is no inward bulging of the ilmer tube 24.
It will be app~eciated that the reinforcing means 25 defined by the rein-forcing member 31 and the strip 33 defined the outwardly con~oluted con- ~
figuration of the overall hose construction 20. ~;
The reinforcing member 31 of this example is in the form of a 2Q wire, preferably a metal wire 34 which has a sleeve 35 prefarably made of a thermoplastic material disposed th~rearound and the thermoplastic material of sleeve 35 is compatable with the thermoplastic material employed to make the lnner tube 24 whereby th= memb~r 31 may be : ~:
. ' . . - ., . -: . :. . ~ . .
suitably bonded agnll~st the lnner t~be 24 by heat: fuslon or slJitable ad-hesive ~ean~ as lndicated by th~ bondln~ means 36 between th~ c~le~ve 35 and the inner tube 24 at a few representative locatlons ln FIG. 2.
The strip 33 is an elastomeric strip prefcrably mada of a thermo-plastic ~terlal. The strip 33 has a width indicated at 37 whi~ch enables each helical turn of such strip to be disposed about a plurality of two .. immediately adjacent turns of the reinforcing member 31.
The reinforcing member 31 18 a preformed helical coil which has been pre-coiled so that the resulting helix has an inside diameter sub-stantiall~ equal to the outside diameter 40 of the inner tube 24. Further, the inner tube 24 is a heat set inner tube and the portions of components 31 and 33 capable of being heat set are also heat set. Accordingly, thc pre-coiled reinf~rcing member 31 cooperating primarily with the heat set inner ~
tube 24 assure retention of tha smooth bore of the overall hose constructio~ .
20; and, such smooth bore or inside surface 22 is free of inward bulges or .
inward convolutions to assure unrestricted fluid flow in a non-turbulent manner.
As indicated earlier, the outer convolutions of the hose construc-tion 20 are defined by the reinforcing member 31 co.operatin~ with the strip .
33. Further, it will be seen that the inner tube 24 has minimum thickness 30 which is approximately equal to the maximum thickness of the reinforcing member 31 and in this exemplary embodiment is roughly equal to the diameter of the sleeve 35. The hose construction 20 is preferably made employing the method 21 showl~ in FIG. l whlch ls a con.inoou: method.
1:
~ 7~i3~
In such method a plurality oE rectilLn~ar mandrels, indicatecl s~hematlcally by arrows 43, of substantial length gen~rally of the ordcr o~ 50 feet, and more, are moved continuously through various stations. In particular, each mandrel 43 ls moved through a crossh~ad extrusion apparatus 44 of known construction and operation where a thin-walled tube, also designated 24, i9 extruded therearound as a seamless tube to define a tube-covered mandrel 45.
The tube covered mandrel 45 is suitably cooled in the area indl-cated at 46 and moved into a wire coiling station 47 where the reinforcing member 31 is pre-coiled in a helical configuration so that the inside dia-meter of the helical coil is substantially equal to the outside diameter 40 of the inner tube 24. Any suitable apparatus known in the art may be employed for this purpose and such apparatus is employed continuously to apply the reinforcing member around the tube-covered mandrel 45 so-that the reinforcing member 31 is disposed agains~ the outside surface 32 of the tube 24 in a non-embedding manner.
The tube-covered mandrel 45 wi-hh thc reinforcing member 31 dis-posed therearound is then moved to a wrapping station 50 where the strip 33 is disposed therearound; and, any suitable known apparatus may be used for this purpose. The resulting construction is, in essence, the hose con-struction 20 illustrated in FIG. 2, and such construction emerges the wrapping station at 52.
The hose construction 20 is then moved into an oven 54 in a con~
tinuous manner causing heat setting thereof and in particular heat setting such that the inner tube 24, in essence, rigidifies and retains its smooth bore 22 free ~,, .
.. ~ . . .
z oE convolu~Lons, in~ rcl b~iLgcs, ol: the Like. S~ taneously, w:i,th -the heat-setting action ~e oven 5~ provic`les h~t boncL~ly or Eus:ion o~ the sleeve 35 ac3ainst the outslde surEace 32 oE the .inner tuve 2~ clS shcwn at 36 ar~l heat fusion oE the strip 33 against such s~lrface 32.
The now hP,at set hose constmction is suitcibly ccx~lecl at a cooLing s~tion 55 -to deEine -the c,~pleted hose construc-tion 20; and, the c~mpleted hose cons-truction ls o,E ~xtendecl length over a plurality of ~nclrels whereby i-t is then cut at opposite ends of each ~andrel ~3 to define such hc~se con-struction 20 corresponding in length to its manc,lrel. I~ach ma~drel 43 is then suitably re~ioved frc~n wi-thin i~s length of hose construction 20 using techniclues which a~-e known in the ar-t and each of such rem4ved mandrels is returned as indicated by the arrow 56 upstre~n of the extrusion apparatus 44 to repeat the formation of a hose c~nstruction 20 therearound in a continu-ous ~anner and as described akove.
Other exemplary e~kodiments of the hose construction of other aspects of this invention are illus-trated in FIGS. 3~ 4 and 5 of the clrawing.
The hose cons-tructions illustrated in FIGS. 3, 4, and 5 are very similar to the hose construction ?; there~ore, such hose constructic~s will ke desig-nated generally by the reference numerals 20A, 20B, and 2GC respectively and com~onen-t parts of each hose construction 20A, 20B, and 20C whic.h are sili-lar to corresponding parts of the hose construction 20'will be designated by the same reference numeral as in the hose cons-truction 20 also followed ' by the associated let-ter designation either A, B, or C and not describe~
again in detail.
The hose construction 20 has an inner tube 24A, .
: . . . . .
~.~ 517~3~
a reinforcing member 31A, and a strlp 33A. The strip 33A is h~llcally wound so that each turn of such strip 33A :Ls dlsposed around and aga.lnst an associ-ated correspondlng helical turn of the member 3:LA; and, the strip 33A has oppos~d side edges 60A disposed such that ~ach turn has each of lts opposed side edges disposed in abutting rclation with an edge of an adjoining turn as shown at 61A. In the hose construction 20A the o~ltwardly convoluted configuration of such hose construction is def:Lned by th~ helically coiled reinforcing member 31A cooperating with the single thickness strip 33A.
With this construction as each turn of the strip 33 is viewed in cross sec-tion it will be seen that it has a U-shaped center portion 62A ad~oined at the opposite edges of the U-shaped portion by lateral extensions 63A. The .
member 3LA is disposed with the U-shaped portion 62A. ~ ~:
The hose construction 20B has an inner tube 24B, reinforcing member 31B and strip 33B; however, the strip 33B thereof is in the form of a preformed strip which when viewed in cross sertion or from an end thereof has a roughly semicircular central portion 64B adjoined at opposite end edges thereof by outwardly tapering extensions 65B. The: length of each ex-tension is such that uncovered spaces 66B are defin~d between ad~oining turns of the strip 33B. :~
Hose construction 20C of FIG. 5 iB also comprised of an inner : tube 24C and has the reinforcing means 25C thereof in the form of a single member designated generally by the reference numeral 67C. The member 67C ~ -~
is helically wrapped around and against the inner tube 24C~ The member 67C
is defined by a rectangular strip portion 70C which has an enlarged sub- -stantially semicircular bead portion 71C
'~,'" , .`: . , .
O, ~
.,. .~ .
: : . .: ,. - . : :
S3~ ~
.
in the cen~ral portion thereoE and the ~ ber 67C ls preferably made cn-tirely of a thermoplastic material.
T~le strip portion 70C also has oppose~d end edges 72C and when the me~ber 67C is helically wound around the inner tube 24C the end edges 72C
oE each helical turn of the str:Lp portion 70C are dlspo3ed Ln abutting relation with adjoining end edges 72C of ad~oinLng turns of each strip.
The strip portion 70C and thus member 67C is bonded against the outside sur-face 32C of the tube 24C by heat fustion or adhesive means as shown at 73C.
It will be apprieciated that the enlarged semi-circular bead portions 71C
of the member 67C when helically would around the inner tube 24C define the outer conv~lutions of the hose construction 20C.
Each hose construction 20A, 20B, and 20C is preferably defined in a similar manner and basically in a similar manner as the hose construc-tion 20 and each may be defined employing the method 21 disclosed in FIG. 1.
Further, each reinforcing member 31A, 31B, and 67C is pr~ferably bonded against the outside surface of its associated inner tube by heat fusion.
However, it will be appreciated that suitable ad~esive means in the form of an adhesive, solvent, Qr the l~ke may be provided where each reinforcing member contacts its inner tube to adhesively bond the reinforcing member 20- and its associated tube.
Each hose construction 20, 20A, and 20B is shown employing an associated reinforcing member 31~ 31A, and 31B respectively which has a central metal wlre with a preferably thermoplastic sleeve therearound and the wire of each member may be simply a reinforcing wire or such wire may be in the "`
' ' .
". ~ .
- 11 -- . ' - .. - ;- . . - ~
. , . : ,; ~ ~ : . . .. ,: , .. .
S3;2 form of an electrical conductor which may be used wlth a ground wire, not shown, and for a purpose wh:Lch is well known in the art. ~lso, lnstead of having a single wire disposed helically around the inner tube a pl-lrality of insulating sleeve covered clectrical wires (such as two wires) may be hel:L-cally disposed in position around the associate.d inner tube for the purpose of carrying electricity as well as providing reinf.orcement and as :Ls well known in the art. The electrical wires are also helically wrapped with an outer strip or tape to arrive at a hose construction similar to the hose construction 20.
The strip -disposed around the reinforcing members 31, 31A, or 31B
may also be in the form of a thermoplastic strip which may also be bonded in position by heat Eusion or suitable adhesive means.
Each exemplary hose constructlon disclosed herein has optimum flexibility, has a smooth inside surface free of inward convolutions or bul~
ges, and has an inner tube of minimum wall thickness for optimum flexibility yet because of the utilization of a helically coiled reinforcing menas dis- ~;
posed around the inner tube in a non-imbedding manner each of such hose ~ .
constructions is capable of containing and conveylng fluid either under partial vacuum or under substantial pressure. In addition, the outwardly projecting convolutiong of each hose construction provide spaced corruga- :
tions enabling sliding of each hose construction over any surface with .
minimum friction and wear. :
Reference has been made in this disclosure to the utili~ation of a thermoplastic material to define each lnner tube, each sleeve disposed ~.
around each wire of each reinforcing member, and the reinforcing means 67C .
of the hose . . , ... , . ,. : : ..
s3æ
construction 20C; and, :It i5 to be und~rstood that any suitable thcrmo-plastlc materlal known ~in the art may be used for this p~rpose.
, .
.
.
Claims (17)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A reinforced flexible outwardly convoluted smooth bore hose construction comprising, a thermoplastic inner tube having a smooth cylin-drical inside surface defining said smooth bore, and reinforcing means dis-posed in helically coiled relation around and against said tube free of em-bedment in said tube thereby defining the outwardly convoluted configuration of said hose construction, said reinforcing means consisting of a rectangu-lar thermoplastic strip portion having an enlarged, substantially semicircu-lar bead portion in the central portion thereof, said tube having a wall thickness which assures flexibility and said reinforcing means providing reinforcement enabling carrying of a fluid in said hose construction at a substantial differential pressure from ambient pressure.
2. A hose construction as claimed in claim 1 and further includ-ing means bonding said strip against said tube.
3. A reinforced flexible outwardly conboluted smooth bore hose construction comprising, a thermoplastic inner tube having a smooth cylin-drical inside surface defining said smooth bore, and reinforcing means dis-posed in helically coiled relation around and against said tube free of embedment in said tube, thereby defining the outwardly convoluted configura-tion of said hose construction, said reinforcing means having at least a portion thereof made of a thermoplastic material and comprising a reinforc-ing member disposed in helically coiled relation around and against said tube, said reinforcing member having an outer portion defining said portion made of a thermoplastic material, and a strip helically wrapped around said member and bonded to said tube, holding said member against said tube, where-in said tube has a wall thickness roughly equal to the maximum thickness of said reinforcing member.
4. A hose construction as set forth in claim 3 in which said reinforcing member is precoiled to an inside diameter substantially equal to an outside diameter of said tube and said hose construction is in a heat set condition which assures retention of said smooth bore.
5. A hose construction as set forth in claim 3 in which said reinforcing member is comprised of a metallic wire.
6. A hose construction as set forth in claim 3 in which said re-inforcing member is in the form of a metallic wire having a plastic sleeve disposed therearound and further comprising means bonding said plastic sleeve against said tube.
7. A hose construction as set forth in claim 6 in which said bonding means comprises adhesive means.
8. A hose construction as set forth in claim 7 in which said bonding means comprises a heat fused area between said outside surface of said sleeve and said tube.
9. A hose construction as set forth in claim 3 in which said strip is in the form of a plastic tape.
10. A hose construction as set forth in claim 9 in which said plastic tape is helically wrapped so that it extends over a plurality of adjoining turns of said reinforcing member and the outwardly conboluted configuration in said hose construction is defined by a double thickness of said tape disposed around each helical turn of said reinforcing member.
11. A hose construction as set forth in claim 10 in which said tape is a single thickness tape having opposed edges arranged in abutting relation.
12. A hose construction as set forth in claim 3 in which said strip is in the form of a preformed plastic strip having a roughly semicir-cular cross-sectional configuration adjoined at opposite ends thereof by outwardly tapering extensions.
13. A method of making a reinforced flexible outwardly convoluted smooth bore hose construction, said method comprising the steps of: forming a thermoplastic inner tube having a smooth cylindrical inside surface which defines said cylindrical smooth bore; and disposing reinforcing means in helically coiled relation around and against said tube free of embedment in said tube, thereby defining said outwardly convoluted configuration of said hose construction, said reinforcing means having at least a portion thereof made of a thermoplastic material, said reinforcing means consisting of a rectangular thermoplastic strip portion having an enlarged substantially semicircular bead portion in the central portion thereof, said tube having a wall thickness which assures flexibility and said reinforcing means pro-viding reinforcement enabling carrying of a fluid in said hose construction at a substantial differential pressure from ambient pressure.
14. A method as set forth in claim 13 and including the further step of bonding said strip against said tube.
15. A method as set forth in claim 15 in which said disposing step comprises: helically coiling a reinforcing member around and against said tube, said reinforcing member having an outer portion comprising said portion made of a thermoplastic material; and helically wrapping a strip around said member to hold said member against said tube.
16. A method as set forth in claim 15 in which said helically coiling step comprises: precoiling said member so that it has an inside dia-meter substantially equal to an outside diameter of said tube.
17. A method as set forth in claim 16 and including the further step of heat setting said hose construction to assure retention of said smooth cylindrical bore.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US76467377A | 1977-02-02 | 1977-02-02 | |
| US764,673 | 1977-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1087532A true CA1087532A (en) | 1980-10-14 |
Family
ID=25071417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA296,017A Expired CA1087532A (en) | 1977-02-02 | 1978-02-01 | Hose construction and method of making same |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA1087532A (en) |
| DE (1) | DE2804251A1 (en) |
| FR (1) | FR2379746A1 (en) |
| GB (1) | GB1574284A (en) |
| IT (1) | IT1092149B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8621683B2 (en) | 2008-03-31 | 2014-01-07 | Coflex S.A. De C.V. | Flexible drainage trap |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4283594A (en) * | 1979-12-17 | 1981-08-11 | Dayco Corporation | Vacuum apparatus having protective device for operator and method |
| GB8608972D0 (en) * | 1986-04-12 | 1986-05-14 | Cambrian Plastics Ltd | Stiffening of containers |
| EP1031311A1 (en) * | 1999-02-16 | 2000-08-30 | Flexible Ducting Limited | Suction hose comprising rigid and flexible portions |
| DE102006019562B4 (en) * | 2006-04-21 | 2014-07-31 | Masterflex Ag | Provided with reinforcing element hose line and method and apparatus for their preparation |
| DE202009009809U1 (en) * | 2009-07-17 | 2010-11-25 | Schonath, Andreas | Composite hose consisting of an outer hose and an inner hose |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE503984A (en) * | 1950-07-06 | |||
| US3047026A (en) * | 1959-09-23 | 1962-07-31 | Acme Hamilton Mfg Corp | Flexible hose |
-
1978
- 1978-01-26 IT IT19660/78A patent/IT1092149B/en active
- 1978-01-26 GB GB3209/78A patent/GB1574284A/en not_active Expired
- 1978-02-01 CA CA296,017A patent/CA1087532A/en not_active Expired
- 1978-02-01 FR FR7802768A patent/FR2379746A1/en not_active Withdrawn
- 1978-02-01 DE DE19782804251 patent/DE2804251A1/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8621683B2 (en) | 2008-03-31 | 2014-01-07 | Coflex S.A. De C.V. | Flexible drainage trap |
| US9932727B2 (en) | 2008-03-31 | 2018-04-03 | Coflex S.A. De C.V. | Flexible drainage assembly |
| US10151086B2 (en) | 2008-03-31 | 2018-12-11 | Coflex S.A. De C.V. | Flexible drainage trap |
| US11066818B2 (en) | 2008-03-31 | 2021-07-20 | Coflex S.A. De C.V. | Flexible drainage trap |
| US11629485B2 (en) | 2008-03-31 | 2023-04-18 | Coflex S.A. De C.V. | Flexible drainage trap |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1574284A (en) | 1980-09-03 |
| FR2379746A1 (en) | 1978-09-01 |
| IT1092149B (en) | 1985-07-06 |
| IT7819660A0 (en) | 1978-01-26 |
| DE2804251A1 (en) | 1978-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4800928A (en) | Flexible pipe | |
| US4383555A (en) | Helically wound hose from co-extruded profile with reinforcing ribs interlocked at adjacent convolutions | |
| CA2066257C (en) | Flexible hose constructions and methods of making the same | |
| US5383497A (en) | Flexible hose construction having an inner corrugated hose made of polymeric material | |
| EP0246360A1 (en) | Flexible hard pipe | |
| US4587145A (en) | Flexible hose | |
| CA2066255C (en) | Hose construction, coupling therefor and methods of making the same | |
| CA1167535A (en) | Electrical current-carrying flexible hose | |
| US4259991A (en) | High pressure hose construction and method of and apparatus for making the same | |
| US5573038A (en) | Pressure-resistant helical corrugated pipe including a thin metal reinforcing plate | |
| US4233097A (en) | Method of making a flexible plastic tube | |
| CN1420973A (en) | Flexible pipe and method of mfg. same | |
| US4471813A (en) | Hose construction | |
| JP2003503996A (en) | Multi-channel duct assembly for cable | |
| CA1087532A (en) | Hose construction and method of making same | |
| US4302266A (en) | Method for making high pressure hose | |
| US5145545A (en) | Flexible hose construction and method of making the same | |
| US4062380A (en) | Hose construction | |
| US5385174A (en) | Pressure-resistant helical corrugated pipe | |
| EP0539429A1 (en) | Composite pipe with one or more layers of strip material wound around an inner pipe and reel provided with such a composite pipe wound onto it. | |
| EP0841072A3 (en) | Angiographic catheter with unitary body and tip sections and method for making same from a continuous feedstock | |
| KR850001098Y1 (en) | Doubled-walled corrugated synthetic resin pipe | |
| US4490200A (en) | Flexible, non-kinkable hose and method for making the same | |
| JPS59121216A (en) | Outer casing of control cable | |
| JPH0518548Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |