U.S. patent number 3,781,941 [Application Number 05/219,688] was granted by the patent office on 1974-01-01 for vacuum intake safety means.
This patent grant is currently assigned to The Scott & Fetzer Company. Invention is credited to Charles H. MacFarland.
United States Patent |
3,781,941 |
MacFarland |
January 1, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
VACUUM INTAKE SAFETY MEANS
Abstract
A coupling is provided for a vacuum cleaner including a male
connector member adapted for sliding fit with an associated female
connector member. One of the connector members is integrally
connected to the vacuum intake tube or hose adjacent the intake end
thereof and forms a vacuum intake mouth having a notched or
apertured configuration adapted to prevent sealing engagement when
the intake mouth is pressed against portions of the human body
while the vacuum cleaner is running. The connector members are
designed to interfit and form a fluid-tight seal, closing off the
notched or apertured configuration, and transmitting the suction
effect of the vacuum cleaner.
Inventors: |
MacFarland; Charles H.
(Cleveland, OH) |
Assignee: |
The Scott & Fetzer Company
(Cleveland, OH)
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Family
ID: |
22820336 |
Appl.
No.: |
05/219,688 |
Filed: |
January 21, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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35490 |
May 7, 1970 |
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Current U.S.
Class: |
15/339; 15/421;
285/7; 285/328 |
Current CPC
Class: |
A47L
9/02 (20130101); A47L 9/242 (20130101) |
Current International
Class: |
A47L
9/24 (20060101); A47L 9/02 (20060101); A47l
009/24 () |
Field of
Search: |
;15/327R,420,421,339
;285/7,330 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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882,711 |
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Mar 1943 |
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FR |
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646,471 |
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Jul 1928 |
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FR |
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Primary Examiner: Wilhite; Billy J.
Assistant Examiner: Moore; C. K.
Attorney, Agent or Firm: Harold F. McNenny et al.
Parent Case Text
RELATED APPLICATION
This is a continuation-in-part of my copending application Ser. No.
35,490, filed May 7, 1970 and now abandoned.
Claims
What is claimed is:
1. In combination with a vacuum cleaner having means defining a
suction opening and sectionalized tube means fixed to said opening,
a coupling for joining sections of said tube means together
comprising a male connector member at the end of one tube section
and a female connector member at the end of a cooperating tube
section, said members being designed for sliding fit with each
other to be held together solely by friction, each section of said
tube means comprising an open-ended vacuum intake element
terminating at its intake end in one of said connector members,
said one connector member forming a vacuum intake mouth for said
vacuum intake element, a plurality of notches formed in said one
connector member at said mouth, each of said notches being of
sufficient width and depth to substantially eliminate the pressure
drop which otherwise occurs when the vacuum cleaner is running and
said intake mouth is pressed or held or positioned against a
child's or adult's eye, ear, or other body part, said notches
defining axially projecting tongues between each circumferentially
attached notch pair, each tongue having axially extending,
substantially parallel side edges and having a smoothly curved
projecting end edge, said end edge comprising a semicircle, said
notches being substantially closed off by insertion of the male
connector member into the female connector member.
2. A device as in claim 1 wherein said male connector member forms
the vacuum intake mouth and has the notches formed therein at said
mouth.
3. A device as in claim 1 in which four wide and deep smoothly
rounded notches are symmetrically disposed about said mouth.
4. In combination with a vacuum cleaner having means defining a
suction opening and sectionalized tube means fixed to said opening,
a coupling for joining sections of said tube means together
comprising a male connector member at the end of one tube section
and a female connector member at the end of a cooperating tube
section, said members being designed for sliding fit with each
other to be held together solely by friction, each section of said
tube means comprising an open-ended vacuum intake element
terminating at its intake end in one of said connector members,
said one connector member forming a continuously planar vacuum
intake mouth for said vacuum intake element, a plurality of
openings formed in said one connector member and spaced from said
mouth, each of said openings being of sufficient area to
substantially eliminate the pressure drop which otherwise occurs
when the vacuum cleaner is running and said intake mouth is pressed
or held or positioned against a child's or adult's eye, ear, or
other body part, said openings being substantially closed off by
insertion of the male connector member into the female connector
member.
5. A device as in claim 4 in which four circular openings are
symmetrically disposed about said member.
Description
FIELD OF THE INVENTION
This invention relates generally to couplings for vacuum cleaner
hose and tube components and, more particularly, to a novel and
improved coupling having axially extending notch means or spaced
apertures adjacent the vacuum intake mouth.
PRIOR ART
The vacuum cleaner is a versatile household appliance which is
adaptable to be used with a variety of accessory equipment. In many
instances, such accessory equipment includes the use of
multisectional hose and tube components or elements to transmit the
suction effect to off-the-floor attachments as well as surface
nozzles. The multisectional hose and tube components are provided
with couplings which permit the components to be quickly and easily
connected and disconnected.
The prior art disclosed a variety of couplings including
male-female type connectors which utilize bayonet and split ring
type fittings. The couplings are typically cylindrical and extend
to an open-ended vacuum intake mouth having a substantially planar
end face. Reference may be had to U.S. Pat. Nos. 1,005,153;
2,326,439; and 2,925,289, for examples of such couplings. Although
such prior art couplings mechanically serve their intended function
in a satisfactory manner, they are not entirely satisfactory from a
safety standpoint.
The safety problems which exist with respect to prior art couplings
relate to the planar end face configuration of the vacuum intake
mouth. In particular, the planar end face forms a substantially
fluid-tight seal when it is pressed against a similarly planar or a
relatively flexible surface such as the human body while the vacuum
cleaner is operating. Consequently, a significantly large pressure
drop or suction effect is developed.
The sealing effect and corresponding pressure drop are undesirable
and, in fact, may be dangerous when young children having a
tendency to play with such appliances are in the household.
Specifically, an infant or unknowing child may place the intake
mouth against delicate portions of the human body. For example, the
infant or child may accidentally or intentionally contact the eye
or ear with the intake mouth of an operating vacuum cleaner or
cause damage to his own body or that of a playmate. In some
instances, the resulting damage to the body may be permanent and
can conceivably include total or partial loss of vital human
senses.
In view of the growing number of vacuum cleaners in use today and
the yound child's inquisitive nature of the carelessness of adults,
the occurrence of such injuries is becoming more than a remote
possibility. In fact, the possibility of an increasing number and
severity of such injuries has been recognized as a safety problem
which may face the entire industry.
SUMMARY OF THE INVENTION
A coupling for a vacuum cleaner comprising male and female
connector members is provided. According to one aspect of the
invention, one of the connector members is connected to a vacuum
intake tube or hose adjacent its intake end and extends to form a
vacuum intake mouth including notch means. According to another
aspect of the invention, the vacuum intake mouth includes aperture
means spaced from a planar end portion of the mouth. The notch
means and the aperture means are both adapted to substantially
eliminate a pressure drop which otherwise occurs when the intake
mouth is pressed against a relatively flexible surface such as the
human body while the vacuum cleaner is running. The associated
members are dimensioned to engage in a sliding fit wherein the
female connector member encircles the male member, closing off the
notch means or the aperture means, to form a fluid-tight seal and
transmit the suction effect of the vacuum cleaner.
In one illustrated embodiment of the present invention, the male
connector member is connected to an open ended vacuum intake tube
adjacent its intake end and the notch means is formed by four
symmetrically disposed notches in the male connector member
adjacent the intake mouth. The notches are dimensioned to
effectively prevent sealing engagement between the vacuum intake
mouth and portions of the human body when it is pressed against the
human body while the vacuum cleaner is running. In addition, the
notches are smoothly rounded to prevent the penetration or puncture
of the human body. The notches may be formed in the shape of a
sinusoidal curve or they may be formed simply as reversed
semi-circles or as other similar preferably smooth and continuous
curves.
In another illustrated embodiment of the present invention, the
male connector member is connected to an open ended vacuum intake
tube adjacent its intake end and aperture means is formed by four
symmetrically disposed openings in the male connector member
adjacent the intake mouth but spaced from a planar end portion of
the mouth. This arrangement prevents sealing engagement between the
vacuum intake mouth and portions of the human body when it is
pressed against the human body while the vacuum cleaner is running.
The provision of openings spaced from the planar end portion of the
mouth maximizes frictional engagement between the male connector
member and the female connector member while eliminating any
projections on the male connector member which might tned to
penetrate or puncture the human body.
In the illustrated embodiments, each of the open ended vacuum
intake ends of the components of the multisectional hose and tube
is provided with notches or openings adjacent the intake mouths
thereof. Thus, the flexible hose, the curved tube extension, the
straight tube extension, and the surface nozzle swivel elbow each
terminates in a male connector member adjacent the intake end
having axially extending notches or openings about the intake
mouth.
BRIEF DESCRIPTION OF THE DRAWINGS
is a perspective view of a vacuum cleaner including a
multisectional hose and tube having couplings according to one
aspect of the present invention, wherein the couplings have been
separated for purposes of illustration;
FIG. 2 is a perspective view of a male connector member having
notch means according to one aspect of the present invention
pressed against a portion of a human body;
FIG. 3 is a sectional view of a coupling with the male and female
members connected according to one aspect of the present
invention;
FIG. 4 is a perspective view of a male connector member having
aperture means according to another aspect of the present
invention; and
FIG. 5 is a sectional view of a coupling with the male and female
members connected according to the aspect of the invention
illustrated in FIG. 4.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring to FIG. 1, there is illustrated a vacuum cleaner 10
having a chassis 12 mounted on wheels 14 for movement of the
cleaner. The vacuum cleaner 10 includes a dust bag 16 connected to
the chassis 12 at the blower outlet 18.
The chassis 12 provides a blower inlet or suction opening 20 which
is adapted to detachably lock and seal with a flexible hose 22. The
flexible hose 22 includes an inner spiral wire 24 which adds
circumferential rigidity to the hose. In order to obtain sealing
engagement between the blower inlet 20 and the hose 22, the hose is
provided with an outlet connector 26 having an outer adapter sleeve
28 and an inner adapter sleeve 30. An annular clip 32 is provided
at the juncture of the inner adapter sleeve 30 as a means to
further detachably lock the hose 22 in place. Reference may be had
to my U.S. Pat. No. 3,279,828 for a detailed description of such an
outlet connector.
The hose 22 extends to a male connector member 34 adjacent its
vacuum intake end. A second annular clip 36 is provided at the
juncture of the hose and the male connector member to permit
rotational movement of the male portion with respect to the hose
and form a fluid-tight seal therebetween. The male connector member
34 is formed of metal; however, it may also be formed of a suitable
plastic material as described below.
The male connector member 34 terminates at a vacuum intake mouth 38
having a series of symmetrically disposed notches indicates by the
numeral 40 adjacent thereto. The notches 40 are generally defined
by a sinusoidal curve having two complete cycles at 180.degree.
about the intake mouth 38 so that four notches are formed about the
entire intake mouth. The outside diameter of the male connector
member 34 progressively decreases from the end thereof adjacent the
hose 22 to the opposite end forming intake mouth 38.
As best illustrated in FIG. 2, the notches 40 are dimensioned so as
to prevent sealing engagement between the male connector member 34
and a relatively flexible surface such as a human ear 42. The
notched configuration provides relatively large openings 44 which
axially extend from the leading end face of the vacuum intake mouth
38 and therefore are not closed off when the intake mouth is
pressed against the ear 42 by an unattended child or careless
adult. Consequently, intake mouth 38 is not sealed against the ear
42 and no substantial pressure drop or suction effect is developed.
In this manner, the ear drum and inner ear are protected and any
possibility of physiological damage is substantially
eliminated.
The notches 40 similarly prevent sealing engagement of the vacuum
intake mouth 38 with other parts of the body. For example, the
notches are sufficiently deep so as to prevent sealing engagement
about the human eye and any damage which might thereby result.
The notches 40 are also sufficiently rounded adjacent the end face
of the vacuum intake mouth 38 to prevent pentration or rupture of
the human body. Consequently, the infant or young child is not
exposed to a relatively pointed or sharp object which could cause
other types of damage.
In order to transmit the suction effect of the vacuum cleaner, the
male connector member 34 must, of course, form a fluid-tight seal
with the other tube components or cleaning nozzles. As shown in
FIGS. 1 and 3, a curved tube extension 46 provides a female
connector member 48 extending to an end face 50.
As best shown in FIG. 3, the female connector member 48 is
dimensioned to receive the male connector member 34 in a sliding
fit and close off the notches 40. To that end, the inside diameter
of the female connector 48 is progressively increased towards the
end face 50. Thus, the female connector member receives and
encircles the male connector member so as to engage it at a
location spaced the vacuum intake mouth 38 and the notches 40 and
thereby close off the notches so as to form a fluid-tight seal. The
male connector member may be provided with serrations 52 which
enhance the gripping action of the female connector member and
thereby form a more secure connection.
The vacuum intake end of the tube 46 is provided with a male
connector member 52 which has a configuration similar to that of
the male connector member 34. Accordingly, the male connector
member 52 extends to a vacuum intake mouth 54 having four
symmetrically disposed notches 56 adjacent thereto. The notches 56
function in the same manner as the notches 40 to prevent sealing
engagement when pressed against portions of the human body.
The tube 46, including the male connector member 52, is formed
entirely of plastic and the notches 54 are subsequently cut in the
male connector member. The male connector member 52 has dimensions
identical to those of the male connector member 34 and forms a
fluid-tight seal when inserted into an associated female connector
member in an identical manner. In addition, the male connector
member has annular serrations 57 to augment the gripping thereof by
an associated female connector member.
As shown in FIG. 1, the tube 46 is being used with a straight
extension tube 58. The extension tube 58 includes a female
connector member 60 which has a configuration identical to that of
the female connector member 48. Therefore, female connector 60 is
dimensioned to receive the male connector 52 of the tube 46 or the
male connector member 34 of the hose 22. The other end of vacuum
intake end of the tube 58 is provided with a male connector member
62 which is identical to the male connector member 52.
A surface swivel elbow 64 having a female connector member 66
extending to define an end face 68 is also shown in FIG. 1. The
female connector member 66 has dimensions identical to those of
female connector members 60 and 48 and, therefore, forms a
fluid-tight seal with any of the male connector members described
above.
The elbow 64 includes a integrally formed annular lip 70 which
remains a male connector member 72 and permits rotational movement
of the male connector member with respect to the elbow. The male
connector member 72 extends to a vacuum intake mouth 74 having
notches 76 adjacent thereto. The function of the notches 76 is
identical to that of the notches described above, and the male
connector member 72 is dimensioned to interfit in any of the female
connector members.
As shown in FIG. 1, a surface cleaning nozzle 78 provides a female
connector member 80 for receiving a male connector member 72. The
female connector membe 80 is, of course, dimensioned to receive any
of the male connector member described.
Since each of the male connector members is dimensioned to interfit
in any of the female connector members and form a fluid-tight seal,
the various components or elements can be assembled in a variety of
arrangements to facilitate the particular cleaning operation. Of
course, one or more of the components can be omitted and a number
of different cleaning nozzles can be employed. Irrespective of the
particular arrangement of components employed, the open-ended
vacuum intake tube terminates in a vacuum intake mouth having a
notch configuration as described above.
In addition, the relationship of the male and female connector
members and the notch means of the present invention are reversible
or interchangeable. Specifically, the vacuum intake mouth may be
provided with a female connector type configuration having notch
means adjacent the intake mouth. Accordingly, the male connector
member is dimensioned to interfit within the female connector
member and form a fluid-intake seal at a location axially spaced
from the notch means.
Referring now to FIGS. 4 and 5, a male connector member 80 is
illustrated. The connector member 80 is attached to a hose 81 by an
annular clip 82 which permits rotational movement of the member 80
with respect to the hose and forms a fluid-tight seal
therebetween.
The member 80 terminates at a planar vacuum intake mouth 83 and a
series of symmetrically disposed circular openings 84 which are
spaced from but are adjacent to the mouth 83. The openings 84 are
dimensioned so as to prevent suctional sealing engagement between
the mouth 83 and a relatively flexible surface such as a human ear
42 or other parts of the human body and are positioned about the
circumference of the member 80 so that it is substantially
impossible to completely close those openings by ones hands or
fingers. It has been found that four symmetrically disposed,
circular openings each having a diameter of one-half inch are
suitable for the purposes set forth herein.
The planar end of the vacuum intake mouth 83 presents a smooth
surface so that the infant or young child is not exposed to any
projections at the intake mouth which could cause other types of
damage.
A female connector member 85 similar to the member 46 is
dimensioned to receive the male connector member 80 in a sliding
fit and close off the openings 84. To that end, the inside diameter
of the female connector 85 is progressively increased towards its
end face 86. Thus, the female connector member receives and
encircles the male connector member so as to engage it at a
location spaced from the vacuum intake mouth 83 and the openings 84
and thereby close off the openings so as to form a fluid-tight
seal. The male connector member 80 may be provided with serrations
87 which enhance the gripping action of the female connector member
and thereby form a more secure connection. However, the provision
of openings in the connector member maximizes the available
surface-to-surface contact between the male and female connector
members, thus enhancing the gripping action. Moreover, the
provision of such openings results in a circumferentially stable
male connector member which will not tend to flex radially inwardly
to thereby decrease the frictional contact between the members.
It should be appreciated that similar male connector member having
openings therein would be provided on the male connecting ends of
tube sections such as the tubes 46 and 58 and on the male
connecting end of the swivel elbow 64. It should also be
appreciated that the openings 84 may have configurations other than
circular and that a single male connector element may be provided
with a combination of notches and openings.
Although preferred embodiments of this invention are illustrated,
it is to be understood that various modifications and
rearrangements may be resorted to without departing from the scope
of the invention disclosed and claimed.
* * * * *