CA1044620A - Hose construction - Google Patents
Hose constructionInfo
- Publication number
- CA1044620A CA1044620A CA266,024A CA266024A CA1044620A CA 1044620 A CA1044620 A CA 1044620A CA 266024 A CA266024 A CA 266024A CA 1044620 A CA1044620 A CA 1044620A
- Authority
- CA
- Canada
- Prior art keywords
- strip
- hose construction
- set forth
- hose
- connecting means
- 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
- F16L11/111—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall with homogeneous wall
-
- 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
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands
Abstract
ABSTRACT OF THE DISCLOSURE
An elongated easily flexed convoluted hose construction is provided. It includes an elongated elastomeric strip and has first and second connecting portions defining opposite side edge portions thereof.
The strip is disposed or wound in a helical pattern with the first and second connecting portions connected together to define the hose con-struction having alternating crests and troughs and the strip when viewed in cross section has a free or unrestrained outwardly convex U-shaped portion of substantial vertical height and uniform wall thickness which defines the crests. The hose construction is easily flexed from a rectilinear configuration upon applying a flexing force thereagainst due to its unrestrained U-shaped portion and uniform wall thickness. More-over, the hose construction is resilient and returns substantially to its rectilinear configuration upon removal of the flexing force.
An elongated easily flexed convoluted hose construction is provided. It includes an elongated elastomeric strip and has first and second connecting portions defining opposite side edge portions thereof.
The strip is disposed or wound in a helical pattern with the first and second connecting portions connected together to define the hose con-struction having alternating crests and troughs and the strip when viewed in cross section has a free or unrestrained outwardly convex U-shaped portion of substantial vertical height and uniform wall thickness which defines the crests. The hose construction is easily flexed from a rectilinear configuration upon applying a flexing force thereagainst due to its unrestrained U-shaped portion and uniform wall thickness. More-over, the hose construction is resilient and returns substantially to its rectilinear configuration upon removal of the flexing force.
Description
~ 104'1620 1~
This invention relates to elongated convoluted hose construc- ~
tions~ t Numerous hose constructionsmade of one or more strips of ;
helically wound elastomeric material have bee~ proposed heretofore. ~
Examples of such hose constructions are presented in United States ~.
"
Patent Nos. 3,199,541 and 3,255,780. .
However. some of the previously proposed hose constructions of the character mentioned, including the one mentioned above, do not pro-vide optimum stress-free'flexibility, and/or are comparatively expensive to manufacture. Others of such'previously proposed hose constructions ,:: ~
do not have optimum structural integrity. ~ :
It is an object of one aspect of this invention to provide an ..
elastomeric hose oE simple construction made from a single strip of 1.~
elastomeric material. '~t`:' ' An object of another aspect of this invention is to provide a ~ hose construction of the'character mentioned having optimum stress-free : flexibility yet'having optimum structural integrity. ~
~;~ . An ob~ect of yet another aspect'of this invention is the pro- ~ .. ~ .
vision of a hose construction of the character mentioned which is of ~:. .
20. inexpensive construction. .~
An ob~ect of another aspect of this invention is the.provision ' '.;
of an elongated convoluted hose construction comprising an elongated . ...
elastomeric strip having first and second connecting means defining ~: ' i~ opposite side edge portions-thereof with the strip being disposed in a : ~. .
j helical pattern with the first and second connecting means connected .
- together to define the hose construction having alternating crests and . ~
~: troughs. The strip when viewed in cross section has a free outwardly :'''~. .
convex U-shaped portion of un'iform wall thickness which defines the .- ' ' .
crests and the hose construction is easily flexed from a rectilinear con- ~ :
figuration upon applying a flexing force thereagainst due to its free ~ .
~ .
U-shaped portion and uniform wall thickness; and, the hose construction ls resilient and returne su~-tantially to its rectilinear confi~ratlon ¦~
This invention relates to elongated convoluted hose construc- ~
tions~ t Numerous hose constructionsmade of one or more strips of ;
helically wound elastomeric material have bee~ proposed heretofore. ~
Examples of such hose constructions are presented in United States ~.
"
Patent Nos. 3,199,541 and 3,255,780. .
However. some of the previously proposed hose constructions of the character mentioned, including the one mentioned above, do not pro-vide optimum stress-free'flexibility, and/or are comparatively expensive to manufacture. Others of such'previously proposed hose constructions ,:: ~
do not have optimum structural integrity. ~ :
It is an object of one aspect of this invention to provide an ..
elastomeric hose oE simple construction made from a single strip of 1.~
elastomeric material. '~t`:' ' An object of another aspect of this invention is to provide a ~ hose construction of the'character mentioned having optimum stress-free : flexibility yet'having optimum structural integrity. ~
~;~ . An ob~ect of yet another aspect'of this invention is the pro- ~ .. ~ .
vision of a hose construction of the character mentioned which is of ~:. .
20. inexpensive construction. .~
An ob~ect of another aspect of this invention is the.provision ' '.;
of an elongated convoluted hose construction comprising an elongated . ...
elastomeric strip having first and second connecting means defining ~: ' i~ opposite side edge portions-thereof with the strip being disposed in a : ~. .
j helical pattern with the first and second connecting means connected .
- together to define the hose construction having alternating crests and . ~
~: troughs. The strip when viewed in cross section has a free outwardly :'''~. .
convex U-shaped portion of un'iform wall thickness which defines the .- ' ' .
crests and the hose construction is easily flexed from a rectilinear con- ~ :
figuration upon applying a flexing force thereagainst due to its free ~ .
~ .
U-shaped portion and uniform wall thickness; and, the hose construction ls resilient and returne su~-tantially to its rectilinear confi~ratlon ¦~
- 2 - :~
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upon removal of the flexing force.
sy one broad aspect of this invention, an elongated convoluted hose construction is provided comprising an elongated elastomeric strip having first and second connecting means defining opposite side edge portions there-of, the strip being disposed in a helical pattern with the first and second connecting means connected together to define the hose construction having alternating crests and troughs, the strip having a free unobstructed out-wardly convex U-shaped portion of uniform wall tkickness which is the only part of the strip defining the crests, the outwardly convex U-shaped portion being defined by a bight and by a pair of parallel legs extending from PF-site ends of the bight, the hose construction being easily flexed from a rectilinear configuration upon applying a flexing force thereagainst due to the free U-shaped portion and uniform wall thickness, the free U-shaped p~r-tion being defined by the bight together with a part of one of the pair of parallel legs and the entire other leg of the pair of parallel legs, the strip further comprising a lateral extension extending perpendicularly out-wardly from one of the parallel legs and away from koth of the legs, the lateral extension having an outer end portion provided with a rectangular .
channel therein, the rectangular channel com~rising the second aonnecting means and the other of the parallel legs of the outwardly oonvex U-shaped portion of the strip having a substantially straight terminal end portion which also has the uniform thickness and defines the first connecting means, the channel extending into the outer end portion with the open end thereof opening in a direction opposite from the direction of opening of the out-wardly convex U-shaped portion, the hose construction being resilient and. .
returning substantially to the rectilinear configuration upon removal of the flexing force.
.
... , .. - -- -- -. .. ... . ~, .. .. . .. .. . .
By one mDdification, thereof the outer end portion has a thickness which is substantially greater than the thickness of the lateral extension and the channel extends into the substantially greater thickness outer end portion.
By a further modification, thc channel has a pair of parallel sides interconnected by a ~ottom wall which extends substantially perpendicular to the bottom edges of ~1e parallel sides, especially where the parallel sides are planar sides and the bottom wdll is a planar bottom wall.
By a still further m~dification, the thickness of the outer end portion is approximately equal to one-half the height of the one leg of the U-shaped portion.
By another variant, the lateral extension with the rectangular channel therein defines a roug~ly U-shaped connector at the terminal end of the extension which defines the second connecting means, the U-shaped con-nector being defined by a bight having a surface which is a continuation of a surface of the lateral extensi~l and a pair of parallel arms extending perpendicular to the bight.
By modifications, thereof the parallel arms ~ay be of equal length, or may be of unequal length.
By a further modification, one of the parallel arms is arranged within the confines of an associated crest when viewing a wall of the hose construction in cross section and the one arm is shorter than the other arm, while in a still further modification, one of the parallel arms is arranged wi thin the confines of an associated crest when viewing a wall of the hose oonstruction in cro.ss section and the one arm is longer than the other arm.
By yet a further modification, the elongated elastomeric strip is a strip of thermoplastic material.
104~20 By a further mt~dificatic)n, the strip is a continuous extruded strip having substantially the sc~ne cross-sectional configuration at each location throughout the entire length.
Ey a still further modification, the lateral extension of the strip defines a substantially s~.ooth inside surface of the hose construction.
By yet another aspect, the hose construction includes atIhesive means bonding the first and second connecting means together in a tenacious manner.
Ey a variation thereof, the adhesive means comprises a molten ad-hesive of the same elastomeric ~aterial as the strip.
By another variant thereof, the adhesive means ca~prises a solventtype adhesive.
By another aspect of this invention, the hose construction includes adhesive means konding the first and second connecting means together, the adhesive means also ex*ending in a substantially U-shaped configuration and serving as the sole means bonding opposite side edge portions of the strip together.
By another aspect of this invention, an elongated convoluted hose constr~lction is provided camprising an elongated elastomeric strip of thermL-plastic material having first and second connecting means defining oppositeside edge portions thereof, the strip being disposed in a helical pattern with the first and second connecting means connected together to define the hose construction having alternating crests and troughs, the strip having a free unobstructed outwardly convex U-shaped portion of substantial vertical height and of uniform wall thickness which is the only part of the strip defining the crests, the outwardly convex U-shaped portion of the strip being defined by a bight and a pair of parallel legs extending from opposite - 4 ~ _ ., .
.... , :: ., , : . . . ., ., . ~ . ; . ,, -1~ 20 ends of the bight, the strip having a lateral extension extending perpendicu-larly outwardly from one of the parallel legs and away from both of the legs, the lateral extension having an outer end portion provided with a rec-tangular channel therein, the rectangular channel cc~prising the first con-necting means and the other of the parallel legs of the outwardly convex portion of the strip having a substantially straight terminal end which also has the uniform thickness and defines the second connecting means, the hose oonstruction being easily flexed from a rectilinear configuration uFon apply-ing a flexing force thereagainst due to the free U-shaped portion and uniform wall thickness, the free U-shaped portion being defined by the bight together with a part of one of the pair of parallel legs and the entire other leg of the pair of parallel legs, the channel extending into the outer end portion with the open end thereof opening in a direction opFosite from the direction ~-of opening of the outwardly convex U-shaped portion, the hose construction being resilient and returning substantially to the retilinear oonfiguratiQn upon removal of the flexing force.
By a variant thereof, the strip is in the form of an extruded strip and the lateral extension of the strip defines a substantially smooth inside surface for the hose CQnStrUCtiOn.
By another aspect, the elongated convoluted hose construction above noted includes adhesive means bonding the first and second connecting means -~
in a tenacious manner.
By one variant thereof, the adhesive means camprises a molten ad-hesive of the same elastomeric material as the strip.
In the acccmpanying drawings, Figure 1 is a view with parts in cross section, parts in elevation, and parts broken away of one exemplary embodiment of a flexible hose cQn-struction of an aspect of this invention~made from an elongated strip of - 4 bA~-~ I~e .
104~6Z0 ., ~
elastomeric material which has been wDund in a helical pattern with op~osed side edge portions thereof sui~ably connected together;
Figure 2 is a perspective view of a short length of the strip used to m~ke the hose construction of Figure;
Figure 3 is an enlarged fragmentary cross-sectional view particu-larly illustrating the manner in which opposite side edge portions of the strip of Figure 2 are connected together;
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Figure 4 is an enlarged cross-sectional view particularly illustrating in an exaggerated'manner'the stretching action that occurs ,;
, along one side of the'hose construction of Figure 1 upon sharply bending ' -or flexing such hose construction;
Figure 5 is a fragmentar~ cross-sectional view illustrating another form of adhesive which may be employed to connect opposite side '., edge portions of the elastomeric strip of Figure 2 to define the hose .
construction of Figure l;
Figure 6 is a fragmentary cross-sectional view similar to the i :
':"- :.
right side portion of Figure 3 and illustrating the manner in which opposite side portions of a modified elastomeric strip are connected together to define another embodiment of the hose construction of another aspect of this invention; and Figure'7 is a fragmentary cross-sectional view similar to ' .
Figure 6 and illustrating the manner in which opposite side portions of ,' :
another modified elastomeric st~ip are connected together to define still .' ' ~.
another embodiment of the hose construction of yet another aspect of this invention.
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. . 1 10~46Z0 Reference is now made to FIG. 1 of the drawing which illustrates one exemplary embodiment of an elongated con-voluted hose construction or hose 20 of one aspect of this invention and, such hose construction is made of a single elongated elastomeric strip which is designated generally by the reference numeral 21 and as best seen in FIGS. 2 and 3 the strip 21 has first connecting means 22 and second connecting mean~ 23 defining opposite side edge portions thereof. The strip 21 is disposed or wound in a helical pattern with the first 22 and second 23 connecting means connected together as best illustrated in FIG. 3 to define the hose construction 20 which has alternating crests 24 and troughs 25.
The strip 21, when viewed in cross section, has an outwardly convex substantially U-shaped portion, also desig-nated by the reference numeral 24, of uniform wall thickness 26 throughout which defines the crests 24 and such U-shaped portion has a free or unstrained portion 27 of substantial - - ~ertical height 28 with the free portion 27 and uniform wall thickness 26 cooperating to enable the hose construction 20 to be easily flexed from a rectilinear configuration thereof, such as is shown in FIG. 1, for example, upon applying a flexing force thereagains*. The hose construction 20 is resilient in character due to the so-called elastic memory of the elastomeric material used to make the hose construction whereby such hose construction will return to its substantially rectilinear configuration upon removal of any flexing force ; applied thereagainst.
As best seen in FIG. 2 the outwardly convex U-shaped portion 24 is defined by a bight 29 and a pair of ' -_5~
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lU~iZ~) parallel legs 30 and 31 extending from opposite ends nf the bight 29 and the strip 21 has a lateral extension 32 extend-ing perpendicularly outwardly from one of the parallel legs 31-31 and in this example the extension 32 extends perpen- ;
dicularly outwardly from leg 30 away from both of the legs 30 and 31. The lateral extension 32 has an outer end portion which is designated generally by the reference numeral 33 ,~
and the outer end portion 33 has a rectangular channel 34 defined therein; and, the channel 34 comprises the connecting means 23. The channel 34 is defined by a pa-r of substantially planar parallel sides each designated by the same reference numeral 35 and the sides 35 have bottom edge's which are inter-connected by a substantially planar bottom 360f such channel 34.
The channel 34 in the outer end portion 33 defines a roughly U-shaped eonnector which may be considered the con-necting means 23 and such U-shaped connector or connecting means also is designatéd by the reference numeral 23. The U-shaped connector or connecting means 23 at the terminal end - of the extension 32 is defined by a b-ight 42 and a pair of parallel arms each designated by the same reference numeral 43 extending from opposite ends of the bight 42 and with the arms 43 extending perpendicular to the bight 42. In the embodiment of FIG. 2 the arms 43 have an approximately equal extension or height and the outer end portion 33 of the extension 32 has a height 40 which is roughly equal to one half of the overall height or thickness 41 of the strip 21. Further, the height 40 is approximately equal to the height 28 of the free or un- ~ v restrained portion 27.
The bight 42 has an outside surface 44 shown coplanar 30 with and asa continuation ofa planarsurface 450f extension32 ' and the -6_ ''~ ~ ~
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adjoining surfaces 45 and 44 of the extension 32 and bight 42 respectively define the inside surface of an asso-ciated trough 25 when the strip 21 is wound in helical form to define hose construction 20.
S The strip 21 is perferably made by extrusion process and inasmuch as such process is well known in the -art a detailed description thereof will not be presented herein. The strip is perferably made of a thermoplastic material and it will be seen that adhesive means designated by the reference numeral 47 in FIG. 3 is provided for bond-ing the first 22 and second 23 connecting means together in a tenacious manner. /
The adhesive means 47 of FIG. 3 is in the form of a plastic adhesive 47 which is preferably made of the same lS material used to makc the elongated helically wound strip 21.
The plastic adhesi~ve 47 may be suitably disposed between the -.~ :
-terminal end portion of the leg 31 and the channel 34 using any technique known in the art. For example, plastic material 47 in molten form may be disposed in channel 34 whereupon the terminal end portion of leg 31, which may be regarded as connecting means 22, is placed therewithin and allowed to -cool and set to define à high strength tenacious bond between connecting means 22 and 23. It will also be noted that the . , .
plastic adhesive 47 assumes a substantially U-shaped con- -figuration around the entire terminal end portion of leg 31.
~ .................. . . . ~ .. ..
ln the present disclosure the ~lastic adhesive means 47 is shown as having a substantial thickness ; and a roughly U-shaped configuration while being disposed around the entire terminal end portion of the leg 31; however, it will be appreciated that such U-shaped adhesive means 47 .' ' . ...
.. ' ~ :
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may be comparatively thinner than shown. Further, for '`' , illustrative purposes, the adhesive means 47 is shown cross ~!
hatched as plastic in different directions from the plastic ~ ~
component portions of the strip 21 that it bonds together; '~ -and, the adhesive means 47 defines a single piece unitary mass of plastic resulting in connections of exceptionally high strength.
The hose construction 20 has optimum flexibility as previously mentioned and such flexibility is due to a ~0 comparatively free or unobstructed portion of the U-shaped ~
,~ portion with such comparatively free portion having the : , -substantial height 28 defined by the bight 29, about half ~' , of leg 31, and the entire other leg 30. This arrangement ~' ' - ' - enables easy stretching of the U-shaped portion 24 from ',~
its normal U-shaped'configura*ion to the exaggerated stretched , configuration illustrated at 51 in ~I6. 4 whereby the hose 20 '~' , defined from strip 21 is easily flexed. Further~ with the ,~'hose construction 20 being made of a thermoplastic resilient material having elastic memory, once the flexing force is removed the hose construction quickly returns to its ori-~; ginal configuration independently of external forces.
Instead of utilizing adhesive means in the formof the molten plastic adhesive 47 illustrated and described in connection with FIG. 3, commercially available adhesive '~
means of any suitably type may be used and such adhesive means is indicated by dots and designated generally by the reference numeral 52 in FIG. 5. Such commercially -available adhesive 52 may be a suitable adhesive composi-tion or may be in the form of a solvent of any type well known in the art which ca,uses softening of the thermoplastic ~ . ., .. . .. . : , : . ., . :. .: . : ; .
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material and upon evaporation of the volatile constituents of the solvent and setting a single-piece unitary mass is prov;ded similar to the single-piece unitary mass provided -by bonding utilizing the molten adhesive means 47 of FIG. 3.
Other exemplary embodiments of the hoseconstruction - of aspects of this invention are illustrated in FIGS. 6 and 7 of .
the drawing. The hose constructions illustrated in FIGS. 6 and 7 are very similar to the hose construction 20; there-fore, such hose constructions will be designated generally by the reference numerals 20A and 20B respectively and com-. . r ~ .
ponent parts of each hose construction 20A or 20B which are similar to corresponding parts of the hose construction 20 1 will be designated by the same numeral as in hose construc- i - tion 20 also followed by the associated letter designation either A or B and not described again. Only those component parts of each hose construction 20A ansl 20B which are dif-ferent from corresponding parts of the hose construction 20 :
will be designated by a new numeral also followed~by their associated letter designation and described in detail.
The hose construction 20A of FIG. 6 is also defined from a single-piece helically wound elastomeric strip 21A of ~, ., substantially uniform thickness 26A throughout; however, in - this embodiment the connecting means 23A at the terminal end of the extension 32Ais defined by a bight 42A and a pair of parallel arms 53A and 54Aof unequal èxtension or height extending from opposite sides of the bight 42A and perpendi-cular thereto.
In particular the arm 53A which is disposed within the confines of the crest 24A and hence against the inside 30 surfdoe of leg 3L~ has d greater hoight or xtencion th-n ',~
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,. .. . . . .
109~620 ~
the leg 54A which is arranged against the outside surface of leg 31A. However, in a similar manner as in the hose construction 20 the crest 24A has a free or unrestrained portion 27A of substantial vertical height 28A enabling the hose construction 20A to be easily flexed.
The stPip 21A is also preferably made by extru- i ~ion process and of a suitable thermoplastic material.
Adhesive means 47Ais provided for bonding together the -. . first.22A and second 23A connecting means of the strip 2h9 in a tenacious manner; and, such adhesive means 47Ais pre-ferably in the form of a suitable plastic adhesive 47A which -~ay be nade of the same material used to make the elongated ~
;~ helically wound strip 21A. .. ~: .
rhe hose construction 20B of FIG. 7is also defined .-from a single-piece helically wound elastomeric strip 21B;
- ~ d, in this embodiment the connecting means 23B at the ;
*er~inal end of the extension 32Bis defined by a bight 428 - and a pair of parallel arms 55B and 56B also of unequal ex- -tension or height qxtending from opposite sides of the bight J;
42B and perpendicular thereto.
However, the arm S5B which is disposed within the r.
-confines of the crest 24B and hence against the inside sur- ~--face of leg 31B has a lesser or smaller height or extension than the leg56a which is arranged against the outside sur-face of leg ~lB. Nevertheless, as in the hose construction 20 the crest 24B has a free or unrestrained portion 27B of substantial vertical height 28B which also enables the hose :: :
construction 20B to be easily flexed.
~he strip 21Bis also preferably made by extrusion process and of a suitable thermoplastic material. Adhesive neans 47B is provided for bonding together the first 2iB
.
. .
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1C~446ZO
and second 23B connecting means of the strip 21B in a tenacious manner; and, as described earlier for strip 21 and 21A such adhesive means 47B is preferably in the :
form of a suitable plastic adhesive 47B whic may be made ~, S of the same material used to make the elongated helically . wound strip 21B.
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upon removal of the flexing force.
sy one broad aspect of this invention, an elongated convoluted hose construction is provided comprising an elongated elastomeric strip having first and second connecting means defining opposite side edge portions there-of, the strip being disposed in a helical pattern with the first and second connecting means connected together to define the hose construction having alternating crests and troughs, the strip having a free unobstructed out-wardly convex U-shaped portion of uniform wall tkickness which is the only part of the strip defining the crests, the outwardly convex U-shaped portion being defined by a bight and by a pair of parallel legs extending from PF-site ends of the bight, the hose construction being easily flexed from a rectilinear configuration upon applying a flexing force thereagainst due to the free U-shaped portion and uniform wall thickness, the free U-shaped p~r-tion being defined by the bight together with a part of one of the pair of parallel legs and the entire other leg of the pair of parallel legs, the strip further comprising a lateral extension extending perpendicularly out-wardly from one of the parallel legs and away from koth of the legs, the lateral extension having an outer end portion provided with a rectangular .
channel therein, the rectangular channel com~rising the second aonnecting means and the other of the parallel legs of the outwardly oonvex U-shaped portion of the strip having a substantially straight terminal end portion which also has the uniform thickness and defines the first connecting means, the channel extending into the outer end portion with the open end thereof opening in a direction opposite from the direction of opening of the out-wardly convex U-shaped portion, the hose construction being resilient and. .
returning substantially to the rectilinear configuration upon removal of the flexing force.
.
... , .. - -- -- -. .. ... . ~, .. .. . .. .. . .
By one mDdification, thereof the outer end portion has a thickness which is substantially greater than the thickness of the lateral extension and the channel extends into the substantially greater thickness outer end portion.
By a further modification, thc channel has a pair of parallel sides interconnected by a ~ottom wall which extends substantially perpendicular to the bottom edges of ~1e parallel sides, especially where the parallel sides are planar sides and the bottom wdll is a planar bottom wall.
By a still further m~dification, the thickness of the outer end portion is approximately equal to one-half the height of the one leg of the U-shaped portion.
By another variant, the lateral extension with the rectangular channel therein defines a roug~ly U-shaped connector at the terminal end of the extension which defines the second connecting means, the U-shaped con-nector being defined by a bight having a surface which is a continuation of a surface of the lateral extensi~l and a pair of parallel arms extending perpendicular to the bight.
By modifications, thereof the parallel arms ~ay be of equal length, or may be of unequal length.
By a further modification, one of the parallel arms is arranged within the confines of an associated crest when viewing a wall of the hose construction in cross section and the one arm is shorter than the other arm, while in a still further modification, one of the parallel arms is arranged wi thin the confines of an associated crest when viewing a wall of the hose oonstruction in cro.ss section and the one arm is longer than the other arm.
By yet a further modification, the elongated elastomeric strip is a strip of thermoplastic material.
104~20 By a further mt~dificatic)n, the strip is a continuous extruded strip having substantially the sc~ne cross-sectional configuration at each location throughout the entire length.
Ey a still further modification, the lateral extension of the strip defines a substantially s~.ooth inside surface of the hose construction.
By yet another aspect, the hose construction includes atIhesive means bonding the first and second connecting means together in a tenacious manner.
Ey a variation thereof, the adhesive means comprises a molten ad-hesive of the same elastomeric ~aterial as the strip.
By another variant thereof, the adhesive means ca~prises a solventtype adhesive.
By another aspect of this invention, the hose construction includes adhesive means konding the first and second connecting means together, the adhesive means also ex*ending in a substantially U-shaped configuration and serving as the sole means bonding opposite side edge portions of the strip together.
By another aspect of this invention, an elongated convoluted hose constr~lction is provided camprising an elongated elastomeric strip of thermL-plastic material having first and second connecting means defining oppositeside edge portions thereof, the strip being disposed in a helical pattern with the first and second connecting means connected together to define the hose construction having alternating crests and troughs, the strip having a free unobstructed outwardly convex U-shaped portion of substantial vertical height and of uniform wall thickness which is the only part of the strip defining the crests, the outwardly convex U-shaped portion of the strip being defined by a bight and a pair of parallel legs extending from opposite - 4 ~ _ ., .
.... , :: ., , : . . . ., ., . ~ . ; . ,, -1~ 20 ends of the bight, the strip having a lateral extension extending perpendicu-larly outwardly from one of the parallel legs and away from both of the legs, the lateral extension having an outer end portion provided with a rec-tangular channel therein, the rectangular channel cc~prising the first con-necting means and the other of the parallel legs of the outwardly convex portion of the strip having a substantially straight terminal end which also has the uniform thickness and defines the second connecting means, the hose oonstruction being easily flexed from a rectilinear configuration uFon apply-ing a flexing force thereagainst due to the free U-shaped portion and uniform wall thickness, the free U-shaped portion being defined by the bight together with a part of one of the pair of parallel legs and the entire other leg of the pair of parallel legs, the channel extending into the outer end portion with the open end thereof opening in a direction opFosite from the direction ~-of opening of the outwardly convex U-shaped portion, the hose construction being resilient and returning substantially to the retilinear oonfiguratiQn upon removal of the flexing force.
By a variant thereof, the strip is in the form of an extruded strip and the lateral extension of the strip defines a substantially smooth inside surface for the hose CQnStrUCtiOn.
By another aspect, the elongated convoluted hose construction above noted includes adhesive means bonding the first and second connecting means -~
in a tenacious manner.
By one variant thereof, the adhesive means camprises a molten ad-hesive of the same elastomeric material as the strip.
In the acccmpanying drawings, Figure 1 is a view with parts in cross section, parts in elevation, and parts broken away of one exemplary embodiment of a flexible hose cQn-struction of an aspect of this invention~made from an elongated strip of - 4 bA~-~ I~e .
104~6Z0 ., ~
elastomeric material which has been wDund in a helical pattern with op~osed side edge portions thereof sui~ably connected together;
Figure 2 is a perspective view of a short length of the strip used to m~ke the hose construction of Figure;
Figure 3 is an enlarged fragmentary cross-sectional view particu-larly illustrating the manner in which opposite side edge portions of the strip of Figure 2 are connected together;
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Figure 4 is an enlarged cross-sectional view particularly illustrating in an exaggerated'manner'the stretching action that occurs ,;
, along one side of the'hose construction of Figure 1 upon sharply bending ' -or flexing such hose construction;
Figure 5 is a fragmentar~ cross-sectional view illustrating another form of adhesive which may be employed to connect opposite side '., edge portions of the elastomeric strip of Figure 2 to define the hose .
construction of Figure l;
Figure 6 is a fragmentary cross-sectional view similar to the i :
':"- :.
right side portion of Figure 3 and illustrating the manner in which opposite side portions of a modified elastomeric strip are connected together to define another embodiment of the hose construction of another aspect of this invention; and Figure'7 is a fragmentary cross-sectional view similar to ' .
Figure 6 and illustrating the manner in which opposite side portions of ,' :
another modified elastomeric st~ip are connected together to define still .' ' ~.
another embodiment of the hose construction of yet another aspect of this invention.
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. . 1 10~46Z0 Reference is now made to FIG. 1 of the drawing which illustrates one exemplary embodiment of an elongated con-voluted hose construction or hose 20 of one aspect of this invention and, such hose construction is made of a single elongated elastomeric strip which is designated generally by the reference numeral 21 and as best seen in FIGS. 2 and 3 the strip 21 has first connecting means 22 and second connecting mean~ 23 defining opposite side edge portions thereof. The strip 21 is disposed or wound in a helical pattern with the first 22 and second 23 connecting means connected together as best illustrated in FIG. 3 to define the hose construction 20 which has alternating crests 24 and troughs 25.
The strip 21, when viewed in cross section, has an outwardly convex substantially U-shaped portion, also desig-nated by the reference numeral 24, of uniform wall thickness 26 throughout which defines the crests 24 and such U-shaped portion has a free or unstrained portion 27 of substantial - - ~ertical height 28 with the free portion 27 and uniform wall thickness 26 cooperating to enable the hose construction 20 to be easily flexed from a rectilinear configuration thereof, such as is shown in FIG. 1, for example, upon applying a flexing force thereagains*. The hose construction 20 is resilient in character due to the so-called elastic memory of the elastomeric material used to make the hose construction whereby such hose construction will return to its substantially rectilinear configuration upon removal of any flexing force ; applied thereagainst.
As best seen in FIG. 2 the outwardly convex U-shaped portion 24 is defined by a bight 29 and a pair of ' -_5~
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lU~iZ~) parallel legs 30 and 31 extending from opposite ends nf the bight 29 and the strip 21 has a lateral extension 32 extend-ing perpendicularly outwardly from one of the parallel legs 31-31 and in this example the extension 32 extends perpen- ;
dicularly outwardly from leg 30 away from both of the legs 30 and 31. The lateral extension 32 has an outer end portion which is designated generally by the reference numeral 33 ,~
and the outer end portion 33 has a rectangular channel 34 defined therein; and, the channel 34 comprises the connecting means 23. The channel 34 is defined by a pa-r of substantially planar parallel sides each designated by the same reference numeral 35 and the sides 35 have bottom edge's which are inter-connected by a substantially planar bottom 360f such channel 34.
The channel 34 in the outer end portion 33 defines a roughly U-shaped eonnector which may be considered the con-necting means 23 and such U-shaped connector or connecting means also is designatéd by the reference numeral 23. The U-shaped connector or connecting means 23 at the terminal end - of the extension 32 is defined by a b-ight 42 and a pair of parallel arms each designated by the same reference numeral 43 extending from opposite ends of the bight 42 and with the arms 43 extending perpendicular to the bight 42. In the embodiment of FIG. 2 the arms 43 have an approximately equal extension or height and the outer end portion 33 of the extension 32 has a height 40 which is roughly equal to one half of the overall height or thickness 41 of the strip 21. Further, the height 40 is approximately equal to the height 28 of the free or un- ~ v restrained portion 27.
The bight 42 has an outside surface 44 shown coplanar 30 with and asa continuation ofa planarsurface 450f extension32 ' and the -6_ ''~ ~ ~
.
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adjoining surfaces 45 and 44 of the extension 32 and bight 42 respectively define the inside surface of an asso-ciated trough 25 when the strip 21 is wound in helical form to define hose construction 20.
S The strip 21 is perferably made by extrusion process and inasmuch as such process is well known in the -art a detailed description thereof will not be presented herein. The strip is perferably made of a thermoplastic material and it will be seen that adhesive means designated by the reference numeral 47 in FIG. 3 is provided for bond-ing the first 22 and second 23 connecting means together in a tenacious manner. /
The adhesive means 47 of FIG. 3 is in the form of a plastic adhesive 47 which is preferably made of the same lS material used to makc the elongated helically wound strip 21.
The plastic adhesi~ve 47 may be suitably disposed between the -.~ :
-terminal end portion of the leg 31 and the channel 34 using any technique known in the art. For example, plastic material 47 in molten form may be disposed in channel 34 whereupon the terminal end portion of leg 31, which may be regarded as connecting means 22, is placed therewithin and allowed to -cool and set to define à high strength tenacious bond between connecting means 22 and 23. It will also be noted that the . , .
plastic adhesive 47 assumes a substantially U-shaped con- -figuration around the entire terminal end portion of leg 31.
~ .................. . . . ~ .. ..
ln the present disclosure the ~lastic adhesive means 47 is shown as having a substantial thickness ; and a roughly U-shaped configuration while being disposed around the entire terminal end portion of the leg 31; however, it will be appreciated that such U-shaped adhesive means 47 .' ' . ...
.. ' ~ :
:
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may be comparatively thinner than shown. Further, for '`' , illustrative purposes, the adhesive means 47 is shown cross ~!
hatched as plastic in different directions from the plastic ~ ~
component portions of the strip 21 that it bonds together; '~ -and, the adhesive means 47 defines a single piece unitary mass of plastic resulting in connections of exceptionally high strength.
The hose construction 20 has optimum flexibility as previously mentioned and such flexibility is due to a ~0 comparatively free or unobstructed portion of the U-shaped ~
,~ portion with such comparatively free portion having the : , -substantial height 28 defined by the bight 29, about half ~' , of leg 31, and the entire other leg 30. This arrangement ~' ' - ' - enables easy stretching of the U-shaped portion 24 from ',~
its normal U-shaped'configura*ion to the exaggerated stretched , configuration illustrated at 51 in ~I6. 4 whereby the hose 20 '~' , defined from strip 21 is easily flexed. Further~ with the ,~'hose construction 20 being made of a thermoplastic resilient material having elastic memory, once the flexing force is removed the hose construction quickly returns to its ori-~; ginal configuration independently of external forces.
Instead of utilizing adhesive means in the formof the molten plastic adhesive 47 illustrated and described in connection with FIG. 3, commercially available adhesive '~
means of any suitably type may be used and such adhesive means is indicated by dots and designated generally by the reference numeral 52 in FIG. 5. Such commercially -available adhesive 52 may be a suitable adhesive composi-tion or may be in the form of a solvent of any type well known in the art which ca,uses softening of the thermoplastic ~ . ., .. . .. . : , : . ., . :. .: . : ; .
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material and upon evaporation of the volatile constituents of the solvent and setting a single-piece unitary mass is prov;ded similar to the single-piece unitary mass provided -by bonding utilizing the molten adhesive means 47 of FIG. 3.
Other exemplary embodiments of the hoseconstruction - of aspects of this invention are illustrated in FIGS. 6 and 7 of .
the drawing. The hose constructions illustrated in FIGS. 6 and 7 are very similar to the hose construction 20; there-fore, such hose constructions will be designated generally by the reference numerals 20A and 20B respectively and com-. . r ~ .
ponent parts of each hose construction 20A or 20B which are similar to corresponding parts of the hose construction 20 1 will be designated by the same numeral as in hose construc- i - tion 20 also followed by the associated letter designation either A or B and not described again. Only those component parts of each hose construction 20A ansl 20B which are dif-ferent from corresponding parts of the hose construction 20 :
will be designated by a new numeral also followed~by their associated letter designation and described in detail.
The hose construction 20A of FIG. 6 is also defined from a single-piece helically wound elastomeric strip 21A of ~, ., substantially uniform thickness 26A throughout; however, in - this embodiment the connecting means 23A at the terminal end of the extension 32Ais defined by a bight 42A and a pair of parallel arms 53A and 54Aof unequal èxtension or height extending from opposite sides of the bight 42A and perpendi-cular thereto.
In particular the arm 53A which is disposed within the confines of the crest 24A and hence against the inside 30 surfdoe of leg 3L~ has d greater hoight or xtencion th-n ',~
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. .
,. .. . . . .
109~620 ~
the leg 54A which is arranged against the outside surface of leg 31A. However, in a similar manner as in the hose construction 20 the crest 24A has a free or unrestrained portion 27A of substantial vertical height 28A enabling the hose construction 20A to be easily flexed.
The stPip 21A is also preferably made by extru- i ~ion process and of a suitable thermoplastic material.
Adhesive means 47Ais provided for bonding together the -. . first.22A and second 23A connecting means of the strip 2h9 in a tenacious manner; and, such adhesive means 47Ais pre-ferably in the form of a suitable plastic adhesive 47A which -~ay be nade of the same material used to make the elongated ~
;~ helically wound strip 21A. .. ~: .
rhe hose construction 20B of FIG. 7is also defined .-from a single-piece helically wound elastomeric strip 21B;
- ~ d, in this embodiment the connecting means 23B at the ;
*er~inal end of the extension 32Bis defined by a bight 428 - and a pair of parallel arms 55B and 56B also of unequal ex- -tension or height qxtending from opposite sides of the bight J;
42B and perpendicular thereto.
However, the arm S5B which is disposed within the r.
-confines of the crest 24B and hence against the inside sur- ~--face of leg 31B has a lesser or smaller height or extension than the leg56a which is arranged against the outside sur-face of leg ~lB. Nevertheless, as in the hose construction 20 the crest 24B has a free or unrestrained portion 27B of substantial vertical height 28B which also enables the hose :: :
construction 20B to be easily flexed.
~he strip 21Bis also preferably made by extrusion process and of a suitable thermoplastic material. Adhesive neans 47B is provided for bonding together the first 2iB
.
. .
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and second 23B connecting means of the strip 21B in a tenacious manner; and, as described earlier for strip 21 and 21A such adhesive means 47B is preferably in the :
form of a suitable plastic adhesive 47B whic may be made ~, S of the same material used to make the elongated helically . wound strip 21B.
.
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Claims (21)
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An elongated convoluted hose construction comprising an elongated elastomeric strip having first and second connecting means defining opposite side edge portions thereof, said strip being disposed in a helical pattern with said first and second connecting means connected together to define said hose construction having alternating crests and troughs, said strip having a free unobstructed outwardly convex U-shaped portion of uniform wall thickness which is the only part of said strip defining said crests, said outwardly convex U-shaped portion being defined by a bight and a pair of parallel legs extending from opposite ends of said bight, said hose construc-tion being easily flexed from a rectilinear configuration upon applying a flexing force thereagainst due to said free U-shaped portion and uniform wall thickness, said free U-shaped portion being defined by said bight together with a part of one of said pair of parallel legs and the entire other leg of said pair of parallel legs, said strip further comprising a lateral exten-sion extending perpendicularly outwardly from one of said parallel legs and away from both of said legs, said lateral extension having an outer end portion provided with a rectangular channel therein, said rectangular chan-nel comprising said second connecting means and the other of said parallel elgs of said outwardly convex U-shaped portion of said strip having a sub-stantially straight terminal end portion which also has said uniform thick-ness and defines said first connecting means, said channel extending into said outer end portion with the open end thereof opening in a direction op-posite from the direction of opening of said outwardly convex U-shaped por-tion, said hose construction being resilient and returning substantially to said rectilinear configuration upon removal of said flexing force.
2. A hose construction as set forth in claim 1 in which said outer end portion has a thickness which is substantially greater than the thickness of said lateral extension and said channel extends into said substantially greater thickness outer end portion.
3. A hose construction as set forth in claim 2 in which said channel has a pair of parallel sides interconnected by a bottom wall which extends substantially perpendicular to the bottom edges of said parallel sides.
4. A hose construction as set forth in claim 3 in which said parallel sides are planar sides and said bottom wall is a planar bottom wall.
5. A hose construction as set forth in claim 2 in which said thickness of said outer end portion is approximately equal to one-half the height of said one leg of said U-shaped portion.
6. A hose construction as set forth in claim 2 in which said lateral extension with said rectangular channel therein defines a roughly U-shaped connector at the terminal end of said extension which defines said second connecting means, said U-shaped connector being defined by a bight having a surface which is a continuation of a surface of said lateral extension and a pair of parallel arms extending perpendicular a to said bight.
7. A hose construction as set forth in claim 2 in which said parallel arms are of equal length.
8. A hose construction as set forth in claim 2 in which said parallel arms are of unequal length.
9. A hose construction as set forth in claim 8 in which one of said parallel arms is arranged within the confines of an associated crest when viewing a wall of said hose construction in cross section and said one arm is shorter than the other arm.
10. A hose construction as set forth in claim 8 in which one of said parallel arms is arranged within the confines of an associated crest when viewing a wall of said hose construction in cross section and said one arm is longer than the other arm.
11. A hose construction as set forth in claim 6 in which said elongated elastomeric strip is a strip of thermoplastic material.
12. A hose construction as set forth in claim 6 in which said strip is a continuous extruded strip having substantially the same cross-sectional configuration at each location throughout its entire length.
13. A hose construction as set forth in claim 6 in which said lateral extension of said strip defines a substantially smooth inside surface for said hose construction.
14. A hose construction as set forth in claim 6 and further comprising adhesive means bonding said first and second connecting means together in a tenacious manner.
15. A hose construction as set forth in claim 14 in which said adhesive means comprises a molten adhesive of the same elastomeric material as said strip.
16. A hose construction as set forth in claim 14 in which said adhesive means comprises a solvent type adhesive.
17. A hose construction as set forth in claim 6 and further comprising adhesive means bonding said first and second connecting means togehter, said adhesive means also extending in a substantially U-shaped configuration and serving as the sole means bonding opposite side edge portions of said strip together.
18. An elongated convoluted hose construction comprising an elongated elastomeric strip of thermoplastic material having first and second connect-ing means defining opposite side edge portions thereof, said strip being disposed in a helical pattern with said first and second connecting means connected together to define said hose construction having alternating crests and troughs, said strip having a free unobstructed outwardly convex U-shaped portion of substantial vertical height and of uniform wall thick-ness which is the only part of said strip defining said crests, said outward-ly convex U-shaped portion of said strip being defined by a bight and a pair of parallel legs extending from opposite ends of said bight, said strip having a lateral extension extending perpendicularly outwardly from one of said parallel legs and away from both of said legs, said lateral extension having an outer end portion provided with a rectangular channel therein, said rectangular channel comprising said first connecting means and the other of said parallel legs of said outwardly convex portion of said strip having a substantially straight terminal end which also has said uniform thickness and defines said second connecting means, said hose construct-ion being easily flexed from a rectilinear configuration upon applying a flexing force thereagainst due to said free U-shaped portion and uniform wall thickness, said free U-shaped portion being defined by said bight together with a part of one of said pair of parallel legs and the entire other leg of said pair of parallel legs, said channel extending into said outer end portion with the open end thereof opening in a direction opposite from the direction of opening of said outwardly convex U-shaped portion, said hose construction being resilient and returning substantially to said rectilinear configura-tion upon removal of said flexing force.
19. A hose construction as set forth in claim 18 in which said strip is in the form of an extruded strip and said lateral extension of said strip defines a substantially smooth inside surface for said hose construc-tion.
20. A hose construction as set forth in claim 19 and further comprising adhesive means bonding said first and second connecting means together in a tenacious manner.
21. A hose construction as set forth in claim 20 in which said adhesive means comprises a molten adhesive of the same elastomeric material as said strip.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63733775A | 1975-12-03 | 1975-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1044620A true CA1044620A (en) | 1978-12-19 |
Family
ID=24555501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA266,024A Expired CA1044620A (en) | 1975-12-03 | 1976-11-18 | Hose construction |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1044620A (en) |
| GB (1) | GB1527637A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4310946A (en) * | 1979-01-19 | 1982-01-19 | Plastiflex Company International | Electromagnetic energy-carrying tube and fabrication method therefor, and the combination thereof with suction cleaning apparatus |
| US4291728A (en) * | 1980-04-04 | 1981-09-29 | Dayco Corporation | Hose construction |
| GB2134620A (en) * | 1983-02-04 | 1984-08-15 | Lamson D D Ltd | Improvements in or relating to pneumatic tube carrier systems |
| KR20040009538A (en) * | 2002-07-24 | 2004-01-31 | 이현미 | Hose for vacuum cleaner |
| WO2007138780A1 (en) * | 2006-05-30 | 2007-12-06 | Tigers Polymer Corporation | Flexible hose |
-
1976
- 1976-11-18 CA CA266,024A patent/CA1044620A/en not_active Expired
- 1976-11-19 GB GB4841376A patent/GB1527637A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1527637A (en) | 1978-10-04 |
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