U.S. patent number 3,928,715 [Application Number 05/519,909] was granted by the patent office on 1975-12-23 for vacuum cleaner hose assembly and apparatus and method used in making same.
This patent grant is currently assigned to Dayco Corporation. Invention is credited to Homer N. Holden.
United States Patent |
3,928,715 |
Holden |
December 23, 1975 |
Vacuum cleaner hose assembly and apparatus and method used in
making same
Abstract
A vacuum cleaner hose assembly and apparatus and method used in
making same is provided wherein such hose assembly comprises a
vacuum hose, and a plurality of electrical conductors extending
along the vacuum hose with each conductor having its opposite ends
arranged immediately adjacent the opposite ends of the vacuum hose;
and, electrical connectors are fixed to opposite end portions of
each conductor with each of the connectors comprising a knife-like
portion provided with opposed edges defining sides of a slot and
each knife-like portion is arranged generally transverse the
elongated dimension of the associated end portion of its conductor
with the conductor end portion wedged between the opposed edges to
provide a firm mechanical and electrical connection. A pair of hose
connectors are fixed to the opposite ends of the vacuum hose and
formed substantially as an integral part thereof and each of the
hose connectors has associated electrical connectors embedded
therein.
Inventors: |
Holden; Homer N. (Sylva,
NC) |
Assignee: |
Dayco Corporation (Dayton,
OH)
|
Family
ID: |
26218715 |
Appl.
No.: |
05/519,909 |
Filed: |
October 31, 1974 |
Current U.S.
Class: |
174/47; 138/103;
439/191 |
Current CPC
Class: |
H01B
17/58 (20130101); H01R 13/005 (20130101); F24F
7/06 (20130101); F24F 11/745 (20180101); F24F
13/04 (20130101); A47L 9/246 (20130101); F16L
11/1185 (20130101); H01R 13/05 (20130101); F24F
2007/002 (20130101) |
Current International
Class: |
A47L
9/24 (20060101); F24F 11/04 (20060101); F24F
13/04 (20060101); F16L 11/118 (20060101); H01B
17/58 (20060101); F24F 7/06 (20060101); F16L
11/11 (20060101); F24F 7/00 (20060101); F16L
011/12 (); H01B 007/00 () |
Field of
Search: |
;138/103 ;174/47
;339/97R,97C,15,16R,16C |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
862,660 |
|
Mar 1961 |
|
UK |
|
67,298 |
|
Feb 1951 |
|
NL |
|
869,299 |
|
Nov 1941 |
|
FR |
|
Primary Examiner: Aegerter; Richard E.
Assistant Examiner: Stearns; Richard R.
Attorney, Agent or Firm: Wolk; Reuben
Claims
What is claimed is:
1. A vacuum cleaner hose assembly comprising, an elongated vacuum
hose having opposite ends and a central longitudinal axis, a
plurality of electrical conductors extending in a helical pattern
along said vacuum hose with each conductor having opposite end
portions each disposed in a helical path about said longitudinal
axis and each said opposite end portion being arranged immediately
adjacent the associated opposite end of said vacuum hose, a
plurality of electrical connectors each fixed to an associated end
portion of each conductor while being disposed substantially
parallel to said longitudinal axis, each of said electrical
connectors comprising a knife-like portion provided with opposed
edges defining sides of a slot, each knife-like portion being
arranged generally transverse the helical path of the associated
end portion of its conductor with the conductor end portion being
wedged between said opposed edges to provide a firm mechanical and
electrical connection, and a pair of hose connectors fixed to said
opposite ends of said vacuum hose and formed substantially as an
integral part thereof, each of said hose connectors having
associated ones of said electrical connectors embedded therein and
providing the sole support therefor.
2. An assembly as set forth in claim 1 in which said electrical
connectors include a plurality of male electrical connectors each
fixed to an associated electrical conductor and embedded in one of
said pair of hose connectors and a plurality of female electrical
connectors each fixed to an associated electrical conductor and
embedded in the other of said hose connectors.
3. An assembly as set forth in claim 1 in which said plurality of
electrical conductors comprise a pair of electrical conductors
which also serve as reinforcing wires for said vacuum hose, said
electrical connectors include a pair of male electrical connectors
arranged in spaced parallel relation and each fixed to an
associated electrical conductor and embedded in one of said pair of
hose connectors and a pair of female electrical connectors arranged
in spaced parallel relation and each fixed to an associated
electrical conductor and embedded in the other of said hose
connectors.
4. An assembly as set forth in claim 3 in which said hose has
integral convolutions therein which extend in a helical pattern
between said hose connectors.
5. An assembly as set forth in claim 3 in which each of said pair
of integral hose connectors is made of a thermoplastic material
which provides said sole support for associated electrical
connectors as well as electrical insulation therefor.
6. An assembly as set forth in claim 3 in which said vacuum hose is
made of a thermoplastic material and said hose connectors are made
by injection molding and of a thermoplastic material which is
compatible with the material used to make said vacuum hose.
7. An assembly as set forth in claim 1 in which each of said
electrical conductors also serves as a reinforcing wire for said
vacuum hose and has its own plastic electrical insulating sleeve
therearound and said edges of said knife-like portion of each
connector extend through said insulating sleeve and wedge an
associated conductor therebetween.
8. An assembly as set forth in claim 1 wherein each of said
electrical connectors comprises another knife-like portion arranged
parallel to the first knife-like portion of each connector, said
other knife-like portion also being provided with opposed edges
defining sides of a second slot which is arranged in aligned
relation with said first-named slot, said other knife-like portion
also being arranged generally transverse the helical path of the
associated end portion, said knife-like portions cooperating to
provide a double mechanical and electrical connection of each
electrical connector on its associated conductor.
9. An assembly as set forth in claim 8 in which the wedging of each
conductor between opposed edges of an associated knife-like portion
is the sole means holding an electrical connector and conductor
together.
10. An assembly as set forth in claim 9 in which each of said
electrical connectors has a U-shaped portion defined by a bight and
a pair of outwardly extending legs and said knife-like portions of
each connector comprise the outwardly extending legs thereof.
11. An assembly as set forth in claim 10 in which each of said
slots in each knife-like portion is a keyhole shaped slot.
12. A method of making a vacuum cleaner hose assembly comprising
the steps of providing an elongated vacuum hose having opposite
ends and a central longitudinal axis, extending a plurality of
electrical conductors in a helical pattern along said vacuum hose
so that each conductor has opposite end portions each disposed in a
helical path about said longitudinal axis and each said opposite
end portion being arranged immediately adjacent the opposite ends
of said vacuum hose, providing electrical connectors at opposite
end portions of each conductor, each of said electrical connectors
comprising a knife-like portion provided with opposed edges
defining sides of a slot, arranging each knife-like portion
generally transverse the helical path of the associated end portion
of its conductor, relatively moving the conductor end portion and
associated electrical connector together to wedge said conductor
end portion between said opposed edges to provide a firm mechanical
and electrical connection wherein each electrical connector is
disposed substantially parallel to said longitudinal axis, and
forming a pair of hose connectors around said opposite ends of said
vacuum hose as an integral part thereof to thereby simultaneously
embed associated ones of said electrical connectors therein and
thereby provide the sole support for the associated electrical
connectors.
13. A method as set forth in claim 12 in which said step of
extending electrical conductors comprises extending a pair of
electrical conductors, and said step of providing electrical
connectors comprises providing a pair of male electrical connectors
at one set of end portions of said pair of electrical conductors
and a pair of female electrical connectors at the opposite set of
end portions of said pair of electrical conductors.
14. A method as set forth in claim 13 in which said step of
extending a pair of electrical conductors comprises the step of
extending a pair of electrical conductor wires having comparatively
high strength in said helical pattern along the length of said
vacuum hose whereby said electrical conductor wires also serve as
reinforcing wires preventing collapse of said vacuum hose.
15. A method as set forth in claim 12 in which said step of
providing a vacuum hose comprises providing a vacuum hose made of a
thermoplastic material and said step of forming a pair of hose
connectors around said opposite ends of said vacuum hose comprises
forming said hose connectors of a thermoplastic material which is
compatible with the thermoplastic material of the vacuum hose and
by injection molding process.
16. A method as set forth in claim 12 in which said step of
relatively moving the conductor end portion and associated
electrical connector together comprises moving each electrical
connector radially outwardly against its conductor end portion with
a hammer member and against a backup member.
Description
BACKGROUND OF THE INVENTION
Vacuum cleaners of the so-called tank or canister type often employ
a vacuum hose assembly which is connected to the tank at one end
and at its other end has a cleaning tool such as a rotatable
cleaning brush, or the like, which is usually powered by an
electric motor whereby it is necessary to provide necessary
electrical conductors and connectors along the assembly hose.
Because the vacuum cleaner hose industry is such a highly
competitive one there is a constant effort being made by hose
manufacturers to produce quality hose assemblies with the required
electrical conductors and connectors yet at minimum cost.
SUMMARY
This invention provides a high quality vacuum cleaner hose assembly
and apparatus and method used in making same wherein such hose
assembly is particularily adapted for use with a tank or canister
type vacuum cleaner and wherein such hose assembly is of simple,
economical and safe construction. The hose assembly comprises, a
vacuum hose, a plurality of electrical conductors extending along
the vacuum hose with each conductor having its opposite ends
arranged immediately adjacent the opposite ends of the vacuum hose,
electrical connectors fixed to opposite end portions of each
conductor with each of said connectors comprising a knife-like
portion provided with opposed edges defining sides of a slot and
each knife-like portion is arranged generally transverse the
elongated dimension of the associated end portion of its conductor
with the conductor end portion wedged between said opposed edges to
provide a firm mechanical and electrical connection; and a pair of
hose connectors are fixed to said opposite ends of the vacuum hose
and formed substantially as an integral part thereof with each of
the hose connectors having associated electrical connectors
embedded therein and providing the sole support therefor.
Other details, uses, and advantages of this invention will be
readily apparent from the exemplary embodiments thereof presented
in the following specification, claims, and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings show present exemplary embodiments of
this invention, in which
FIG. 1 is a perspective view with parts in elevation, parts in
cross section, and parts broken away illustrating a vacuum cleaning
apparatus together with an exemplary vacuum hose assembly of this
invention;
FIG. 2 is an enlarged fragmentary cross-sectional view illustrating
a male hose connector and associated male electrical connectors
provided at one end of the hose assembly;
FIG. 3 is an enlarged fragmentary cross-sectional view illustrating
a female hose connector and associated female electrical connectors
provided at the opposite end of the hose assembly;
FIG. 4 is a fragmentary view in elevation of one end of a vacuum
hose showing the manner in which such hose is cut initially
perpendicular to its longitudinal axis;
FIG. 5 is a view similar to FIG. 4 illustrating the manner in which
the vacuum hose and its integral electrical conductors are cut
further to define the configuration illustrated in FIG. 5;
FIG. 6 is a view similar to FIG. 5 illustrating a pair of female
electrical connectors installed in position at the end of the
vacuum hose after cutting thereof as shown in FIG. 5;
FIG. 7 is a view taken essentially on the line 7--7 of FIG. 6 and
illustrating the shorter one of the pair of electrical connectors
of FIG. 6;
FIG. 8 is a view taken essentially on the line 8--8 of FIG. 6 and
illustrating the longer one of the pair of electrical connectors of
FIG. 6;
FIG. 9 is a view taken essentially on the line 9--9 of FIG. 8;
FIG. 10 is a view similar to FIG. 8 illustrating a comparatively
long male electrical connector;
FIG. 11 is a view similar to FIG. 7 illustrating a male electrical
connector which is shorter in axial length than the electrical
connector of FIG. 10;
FIG. 12 is a perspective view with parts in cross-section, parts in
elevation, and parts broken away illustrating an exemplary
semi-automatic machine and certain method steps which may be used
in the making of the hose assembly of this invention;
FIG. 13 is a view illustrating a cutting apparatus and method steps
which may comprise the machine of FIG. 12 to cut each end of the
associated vacuum hose in the manner shown in FIG. 5 in one cutting
step;
FIG. 14 is a view illustrating a connector installing apparatus
which may comprise the machine of FIG. 12 and such apparatus is
used to install a pair of female electrical connectors on
associated electrical conductors in a single step; and
FIG. 15 is a plan view of a lower half of a mold apparatus which is
used to form hose connectors with electrical connectors embedded
therein at opposite ends of a vacuum hose as an integral part of
such vacuum hose to define the hose construction of FIG. 1.
DESCRIPTION OF ILLUSTRATED EMBODIMENTS
Reference is now made to FIG. 1 of the drawings which illustrates
an exemplary vacuum cleaner or vacuum cleaning apparatus which is
designated generally by the reference numeral 25 and which employs
one embodiment of a vacuum cleaner hose assembly of this invention
which is designated generally by the reference numeral 26. The
apparatus 25 has a canister or tank 27 provided with a suitable
vacuum tube 30 extending outwardly from the top portion thereof and
the apparatus 25 uses electrical power to operate its vacuum unit
and in a manner which is well known in the art.
The apparatus 25 has a female electrical receptacle 31 either
mounted on or provided as an integral part of its tank 27 and the
receptacle 31 is used to supply power through the hose assembly 26
of this invention to an electric motor 32 comprising the terminal
end of a cleaning instrument 33 which is suitably operatively
connected at 34 to the hose assembly 26 in accordance with
techniques which are well known in the art. The apparatus 25 has an
electrical cord assembly 35 provided with a male fitting 36 and a
female fitting 37 and the connector 36 is installed within the
electrical connector 31 while the connector 37 is suitably
electrically connected to the hose assembly 26 to provide an
electrical connection to the hose assembly 26. The apparatus 25 has
another electrical cord assembly 40 which has a male connector 41
at one end electrically connected to the hose assembly 26 and the
opposite end of the electrical assembly 40 is suitably electrically
connected to the motor 32 of the cleaning instrument 33. The
electrical connectors provided at opposite ends of the hose
assembly 26 and used to connect the cord assemblies 35 and 40 to
the hose assembly 26 will be described in detail subsequently.
As seen in FIGS. 1-3 and 6, the hose assembly 26 is comprised of a
flexible vacuum hose 42 which has a plurality of two wires 43 and
44 provided substantially as an integral part thereof and as is
well known in the art the wires 43 and 44 are dual function wires
which serve as reinforcing wires to assure that the vacuum hose 42
may be flexed or bent as required in normal use yet it retains its
tubular configuration throughout without collapse; and, the wires
also serve as electrical conductors. The wires or conductors 43 and
44 are insulated by tubular electrical insulating sleeves 45 and 46
respectively and in this example the wires with their sleeves
extend in substantially helical patterns along the hose 42 whereby
the hose 42 has helical convolutions along its length.
The hose assembly 26 has a pair of electrical connectors fixed to
each of its opposite ends and in this example each wire 43 and 44
has a male connector designated by the reference numeral 47 fixed
to one thereof and a female connector 48 fixed to its opposite end.
The male connectors 47 are electrically connected to the female
fitting 37 of the elctrical cord assembly 35 and the female
connectors 48 are suitably electrically connected to the male
connector 41 of the cord assembly 40 whereby once the apparatus 25
is suitably connected to an electrical source, power is provided to
the female connector 31 and an electrical circuit is completed to
the motor 32 through cord assembly 35, male connectors 47,
conductors 43 and 44, female connectors 48, and cord assembly 40.
It will be appreciated that, if desired, suitable controls
including on-off switches, and the like, may be provided at any
point in the abovementioned electrical circuit.
The electrical connectors 47 and 48 are of comparatively
inexpensive construction and easy to install with minimum time and
effort. The manner in which the electrical connectors 47 and 48 are
fixed to associated end portions of their conductors 43 and 44 will
be described in detail subsequently and unique apparatus and method
steps provided for this purpose will be described in detail
subsequently.
The hose assembly 26 has a pair of hose connectors 51 and 52 fixed
to its opposite ends and each hose connector 51 and 52 is provided
essentially as an integral part of the vacuum hose 42 in as much as
each hose connector is preferably formed or made in position
against an associated end portion of the vacuum hose 42. As shown
in FIG. 15, for example, the opposed end portions of a vacuum hose
42 may have the hose connectors 51 and 52 suitably molded in
position thereon using injection molding techniques by placing the
associated end portions 53 and 54 respectively in respective mold
cavities 55 and 56 in the lower half 57 of a mold apparatus 58. The
end portions 53 and 54 have their electrical connectors 47 and 48
suitably fixed in position on their conductors 43 and 44 and in the
showing of FIG. 15 the connectors are beneath their associated hose
end portions and suitably supported and aligned by fixtures, as is
well known in the art, whereupon the other half (not shown) of the
mold apparatus 58 is installed in position and a suitable
elastomeric or plastic material is injected through a channel 60 to
define the hose connectors 51 and 52 in a simultaneous manner while
simultaneously embedding the electrical connectors 47 and 48 in
their respective hose connectors 51 and 52.
The plastic material of the hose connector 51 serves as a matrix
for the male connectors 47 which are positioned so that their
terminal outer ends are arranged in coplanar aligned relation, with
the plane of the ends being parallel to a plane coinciding with the
end of the hose connector 51. The pins 47 are embedded in a
protected position as indicated at 62 in FIG. 2 while being readily
accessible through an access opening 63. Similarly, the female
connectors 48 are arranged in aligned parallel relation with their
terminal ends in a plane which is substantially parallel with a
plane coinciding with the end of the hose connector 52. The female
connectors 48 are embedded so that the elastomeric material of
connector 52 serves as a matrix for the connectors 48. The plastic
material of the hose connectors 51 and 52 provides the sole support
for the electrical connectors 47 and 48 respectively. Further, it
will be seen that the end of connector 51 is adopted to be received
within the vacuum tube 30 while the cleaning instrument 33 has an
end 64 which is adopted to be received in connector 52.
Having described the vacuum cleaner hose assembly 26 and associated
components the detailed description will now proceed with a
description of the unique electrical connectors 47 and 48 provided
at opposite ends of the vacuum cleaner hose assembly 26 and the
female connectors will be described first making particular
reference to FIGS. 6-9 of the drawings.
Each female electrical connector is designated by the reference
numeral 48 although one connector, the connector of FIG. 7, has a
shorter axial length than the connector of FIG. 8. Different length
connectors 48 are required and as will be readily apparent from
FIG. 6. In particular, the increased length of one female connector
48 is necessary to take into account the spacing between the
helically wound conductors 43 and 44 and such spacing is indicated
at 65 in FIG. 6. This length is taken into account by providing an
added length in the central portion of the longer electrical female
connector 48 of FIG. 8 whereby the detailed description will now
proceed with the remaining portions of each female connector
electrical which are substantially identical.
Each connector 48 is preferably made of a single-piece or sheet of
electrically conductive material (see FIGS. 7-9) and so that it has
a tubular end 66 which is adopted to receive an associated
electrical pin therein, and an approximately U-shaped attaching
portion 70 with the U-shaped portion 70 being defined by a bight 71
adjoined at its opposite ends by a pair of knife-like portions each
designated by the same reference numeral 72.
Each knife-like portion 72 is a double-thickness portion provided
with opposed double thickness edges 73 defining sides of a slot 74,
and, as will be readily apparent from FIG. 6 each knife-like
portion 72 is arranged generally transverse the elongated dimension
of the associated end portion of its electrical conductor or wire
43 or 44 with an exposed part of the wire end portion being wedged
between the opposed edges 73 to provide a firm mechanical and
electrical connection. The dimension of the lower portion of the
slot 74 is such that once a connector 47 is installed in position
its knife-like portions 72 serve to cut through the insulating
sleeve, either 45 or 46 depending upon whether the conductor 43 or
44 is being cut, and provide metal-to-metal contact as shown at 75
in FIGS. 7 and 8.
The slot 74 in this example is in the form of a keyhole shaped slot
having a substantially circular upper portion 76 and a lower
portion provided with flared surface portions 77 each of which
adjoins an associated double thickness edge portion 73 whereby
either sleeve insulated conductor 43 or 44 may be easily positioned
along a surface 77 which acts as cam surface or ramp toward edge
portions 73. Once the wire or conductor is forcefully urged toward
the large portion 76 the opposed edges 73 serve as knives cutting
the insulating sleeve, either 45 or 46, exposing the associated
wire to provide the firm mechanical and electrical connection. The
conductor wire is then further pushed within the enlarged portion
76 of the slot, which is shown enlarged in an exaggerated manner in
this example, whereby the wire is, in essence, trapped and held
within portion 76.
Having described the female electrical connectors 48 the
description will now proceed with a detailed description of the
male electrical connectors illustrated in FIGS. 10 and 11. The
connectors of FIGS. 10 and 11 are substantially identical to the
female electrical connectors 48 with the exception that instead of
each connector 47 having a tubular end for receiving a connector
pin therewithin each connector 47 has an end 80 in the form of a
pin with the pin 80 having a rounded end 81 which may have a
central opening 82 therein which enables easier fabrication
thereof. Each male electrical connector 47 also has a central
transition portion 67 similar to the transition portion 67 of each
female electrical connector 48 with the connectors 47 of FIGS. 10
and 11 having different lengths for similar reasons as the female
connectors 48 of FIGS. 7 and 8 respectively. Each male connector 47
also has a U-shaped portion 70 with its bight 71 and
double-thickness knife-like portions 72 provided with slots 74,
edge portions 73, as well as the other component portions of the
U-shaped portion 70.
It will also be appreciated that each electrical connector 47 or 48
instead of having a double thickness knife-like portion 72 may be
provided with a single thickness portion, as desired. Indeed the
edge portions 73 of such single thickness knife-like portions may
be sharp knife edges to facilitate cutting into the electrical
insulating sleeve as well as providing partial cutting into the
solid electrical conductor therebeneath.
The vacuum hose 42 of the hose assembly 26 may be made utilizing
any suitable technique known in the art and in this example the
vacuum hose 42 is shown having a helical outer surface defined by
outwardly convex helical convolutions having the supporting and
conductor wires 43 and 44 therein. The vacuum hose 42 is then cut
as will now be described to enable easy installation of the
connectors 47 and 48.
In particular, opposed ends of a given desired length of hose are
first cut so that each terminal end thereof has an edge 83 which
lies in a plane which is perpendicular to a longitudinal axis 85 of
such vacuum hose 42 and as shown in FIG. 4. The end of the vacuum
hose after having been cut as shown in FIG. 4 is then cut as is
illustrated in FIG. 5 so that its outside edge has a unique
configuration as illustrated at 86 in FIG. 5 and includes a pair of
cutouts 87 and 88. With the cut end of the hose 42 as shown in FIG.
5 an outermost wire 44 is arranged with its end further away from
the longitudinal axis 85 while the end of an adjacent turn of the
wire 43 is closer to the axis or center line 85. This arrangement
is provided so that upon fixing the shorter female electrical
connector 48 on wire 44 and the longer electrical connector 48 on
the wire 43 as shown in FIG. 6 the terminal ends of the electrical
connectors are in aligned relation.
The female electrical connectors are suitably installed in position
by forcing or urging each connector 48 against its associated
conductor wire while suitably backing up the wire so that the
forcing action results in simultaneous cutting through the sleeve
around the conductor wire while providing the firm mechanical and
electrical contact defined by edge portions 73 engaging the
diametrically opposed surfaces of conductor wire as explained
earlier.
Thus, it is seen that this technique does not require soldering,
twisting of wire end portions together, use of special connectors,
or the like, yet provides a mechanical and electrical connection of
high structural strength and optimum electrical conductivity. In
addition, once the hose connectors 51 and 52 are suitably formed or
molded into position against opposite end portions of the vacuum
hose 42 the electrical connectors 47 and 48 are supported in a
plastic matrix and the plastic surrounds while being in intimate
contact with the connector parts which are to be supported thereby
assuring that the electrical and mechanical connection is
maintained throughout the entire life of the hose assembly 26.
The above detailed description has been made with particular
reference to the installation of female electrical connectors 48 on
the terminal ends of the electrical conductor wires 43 and 44.
However, it will be appreciated that substantially the same
procedure is used in installing the male electrical connectors 47
in position whereby the vacuum hose 42 would be cut in a similar
manner as shown in FIGS. 4 and 5 and the male electrical connectors
47 then suitably installed in position and in a similar manner as
shown in FIG. 6.
It will be appreciated that the installation of connectors 47 and
48 on conductors 43 and 44 is achieved by arranging each elongated
connector 47 or 48 transverse the length of the conductor and
pushing or forcing wire and connector together.
The cutting of the end as shown in FIG. 5 may be achieved manually
in a plurality of steps and likewise installation of each
electrical connector 47 or 48, as shown in FIG. 6 for connector 48,
may be achieved manually or in a series of steps. Preferably,
cutting and installation is achieved either automatically or
semi-automatically. For example, FIG. 12 of the drawings
illustrates an exemplary semi-automatic apparatus or machine 95 a
part of which may be used to cut the opposite ends of a
predetermined length of vacuum hose 42 as shown in FIG. 5 after
having first cut such opposite ends square as illustrated in FIG.
4.
The cutting action may be achieved in a simultaneous manner by a
guillotine type cutting device 96, as shown in FIG. 13, and which
employs a central mandrel 97 and a pair of saddle-shaped cutters 98
(shown schematically) which are actuated by suitable actuating rods
99 and in one simultaneous stroke cut on end of the vacuum hose 42
to define the configuration illustrated in FIG. 5. The machine 95
has a pair of devices 96 provided therein on the left side thereof
as shown at 100 whereby both ends of a length of hose 42 after
having been cut as shown in FIG. 4 are slipped over mandrels 97 and
cut simultaneously upon actuating a foot pedal (not shown) of the
machine 95.
It will be appreciated that each mandrel 97 is preferably made of a
suitable material, which is a hard plastic material, which may be
repeatedly engaged a large number of times by the special
configuration cutters 98 without damage to such cutters and minimum
wear while providing the required back-up of the hose 42 to
facilitate cutting to define the cut configuration shown in FIG. 5
in both ends of the hose 42.
With each end of the vacuum hose 42 cut as shown in FIG. 5 the
electrical connectors 47 and 48 may then be suitably installed
thereon with a pair of connectors 47, (i.e., a short and a long
connector) at one end of the hose 42 and a pair of connectors 48
(again a short and a long connector 48) at the opposite end.
The machine 95 provides simultaneous installation of a long and
short female connector 48 at one end of the vacuum hose 42 as shown
at 102 and simultaneous installation of a long and short male
connector 47 in the opposite end of the vacuum hose 42 as shown at
103.
The female connectors 48 are fed through a two compartment conduit
105 at the rear of the machine 95 in spaced parallel relation and
in ribbon-like form with the short female connectors 48 being
attached on one ribbon 106 and the long female connectors being
attached on the opposite ribbon 107. Similarly, the male electrical
connectors 47 are fed through a two compartment conduit 110 at the
rear of the machine 95 in spaced parallel relation and in
ribbon-like form with the short male connectors 47 being attached
to one ribbon 111 and the long connectors attached on an associated
ribbon 112.
The machine 95 operates to install the two female connectors 48 at
one end of hose 42 and the two male connectors 47 at the opposite
end of hose 42 in a substantially simultaneous manner using a pair
of installing devices 113 as shown in FIG. 14.
Upon placing the opposed ends of the vacuum hose 42, cut as shown
in FIG. 5, in position within the apparatus 95 as illustrated at
103 the devices 113 are simultaneously turned on. Accordingly, each
device 113 has a hammer member 114 which is relatively urged toward
a backup member 115, after the ribbons have positioned or
interposed their associated connectors 47 or 48 between hammer 114
and anvil 115.
A device 113 is provided for installing a pair of female connectors
48 and a similar device is provided for installing a pair of male
connectors 47 and it will be appreciated that either member 114 or
115 or both may be moved to provide the installing action of
shoving the electrical connectors around their conductor wires.
After simultaneous installation of a plurality of four connectors
(47 at one end of hose 42 and 48 at the opposite end) the opposed
hose ends are positioned in accordance with techniques known in the
art in the mold of FIG. 15, as explained earlier, to define hose
connectors 51 and 52.
It will be appreciated that the machine 95 is provided with
suitable electrical power and suitable means to operate its devices
96 and 113. Further, the machine 95 has suitable switches,
controls, etc. as required to operate the machine 95.
The vacuum hose 42 comprising the hose assembly 26 of this
invention is preferably made of any suitable material which may be
in the form of a flexible plastic material. Further, while any
suitable plastic material may be used to define the hose connectors
51 and 52 at opposite ends of the hose assembly 42 a thermoplastic
material such as polyvinyl chloride, polyethylene, and the like, is
preferably utilized. In addition, the thermoplastic material is
preferably molded in position by injection molding to the hose
connectors as well as embed the associated electrical connectors in
position.
The thermoplastic material used to define the hose connectors 51
and 52 should be compatible with the flexible plastic material
comprising the vacuum hose 42 to thereby assure that the hose
connectors are formed at opposite ends of the vacuum hose
essentially as an integral part thereof. It will also be
appreciated that the electrical insulating sleeves 45 and 46 on the
electrical conductors 43 and 44 are also made of a suitable plastic
material which is compatible with the plastic material of both the
vacuum hose 42 and connectors 51 and 52.
In this disclosure of the invention the hose assembly 26 is shown
as having a male hose connector 51 at one end provided with male
electrical connectors and a female hose connector 52 at its
opposite end provided with female electrical connectors. However,
it will be appreciated that the concept of this invention utilizing
the unique electrical connectors 47 and 48 may be used to provide
an improved vacuum cleaner hose assembly similar to the hose
assembly 26, but which may have male hose connectors at both ends,
female hose connectors at both ends, and the like, and the
electrical connectors provided on each of these assemblies will be
selected as required in accordance with standard safe practices in
the industry.
In this disclosure each electrical connector 47 or 48 has a
U-shaped portion 70 provided with a bight 71 and a pair of
knife-like portions 72; however, it will be appreciated that each
connector 47 or 48 may be modified so that only a single knife-like
attaching portion 72 is provided and has a slot 74, edge portions,
etc., as desired.
While present exemplary embodiments of this invention and methods
of practicing the same have been illustrated and described, it will
be recognized that this invention may be otherwise variously
embodied and practiced within the scope of the following
claims.
* * * * *