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Патент USA US3092300

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June 4, 1963
3,092,290
J. C. HOELLE
ELECTRICAL CONNECTION FOR SUBMEIRGED GASOLINE PUMP MOTOR
Filed Oct. 7, 1959
2 Sheets-Sheet 1
w
28
INVENTOR.
gE/WFS C. ll/Oflli',
BY
HTTORNE‘YS.
June 4, 1963
J. c. HOELLE
3,092,290
ELECTRICAL CONNECTION FOR SUBMERGED GASOLINE PUMP MOTOR
Filed Oct. 7, 1959
2 Sheets-Sheet 2
193 /120;21 126
118
“4
IN VEN TOP .
Uk/vxrs C.
054/- E3
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United States Patent 0 "ice
1
3,092,290
Patented June 4, 1963
1
2
3,092,290
tough gasolineresistant material such as nylon, and an
outer conductive and protective cover, as of wire braid.
Such cable is provided at at least one end, and prefer
ELECTRICAL CONNECTION FOR SUBMERGED
GASOLINE PUMP MOTOR
James C. Hoelle, Fort Wayne, Ind., assignor to Tokhelm
Corporation, Fort Wayne, Ind., a corporation of
Indiana
Filed Oct. 7, 1959, Ser. No. 845,027
15 Claims. (Cl. 222-76)
ably at both ends, with connector plugs engageable with
the receptacles on the motor and tank. The plug com
prises an outer shell for mechanically and electrically
engaging the sleeve of the receptacle, and such shell is
mechanically and electrically connected to the outer wire
braid of the cable to form an electrical ground connec
10 tion for the motor. Within the shell, the multiple-strand
tem for an electric motor such as the motor vof a motor
wire of the cable is joined to a connector prong by a joint
pump unit mounted in a gasoline or like fuel tank, and
such as a solder joint which seals the interstices between
more particularly to electrical connection means for this
the strands, and such joint is sealed to the cable sheath,
This invention relates to an electrical connection sys
and like applications. This application is a continua
as by a resilient sealing grommet which sealingly engages
tion in part of my copending application Serial No. 15 both the sheath and a sealing ?ange on the joint. The
775,622, ?led November 11, 1958, now Patent No.
plug prong is constructed and arranged to make elec
2,963,203.
trical connection with the prong of the receptacle. A
plug body supports and insulates the prong within the
shell and such body desirably contains a cavity which
a closed container and drives an open pump by means 20 forms an enclosure within which the plug and receptacle
of a magnetic coupling operating through an imperforate
prongs will make contact when the plug is engaged and
wall of the motor housing. In practice, it has been
will break contact when the plug is withdrawn. The
found desirable to take increasingly stringent measures
construction and arrangement of the parts is such that
to seal the motor housing. A companion application of
upon engagement of the plug an electrical grounding
Joseph D. Clymer, Serial No. 775,446, ?led November 25 connection is ?rst established ‘between the shell of the
21, 1958, shows a motor-pump unit having a drive as
plug and the sleeve of the receptacle, and an enclosure
sembly housed in a pair of shells which are welded to
is formed about the approaching prongs [before such
gether to form a hermetically sealed drive assembly
prongs make contact, so that the electrical contact be
housing. This application relates particularly to the pro
tween the prongs is made (and broken) while a ?rm
vision of an electrical system and connections for such 30 ground connection is maintained.
a hermetically sealed electric drive unit, for use in an
The plug body desirably serves to retain the sealing
automotive gasoline tank; but the invention is also use
flange of the prong joint in engagement with the seal
ful in other similar applications.
ing grommet. The plug is desirably connected to the
Accordingly, it is an object of the invention to pro
receptacle by a bayonet joint which is maintained tight
vide an electric motor driven fuel system having im 35 by a spring reacting on the plug body, and the spring
US. Patent No. 2,885,126 shows a submerged gasoline
pumping unit in which the electrical motor is housed in
proved electric connection means adapted to use in an
environment such as the interior of an automotive gaso~
reaction urges the body in a direction to compress the
line fuel tank.
prong ?ange and the cable sheath.
It is a special object of the invention to
provide an electrical connection means for a motor in
sealing grommet into tighter sealing engagement with the
The accompanying drawings illustrate the invention.
a tank in which positive seals can be maintained be 40 In such drawings:
tween the motor housing and the tank and between the
FIG. 1 is a somewhat diagrammatic view showing a
inside and outside of the tank. It is a further object of
gasoline fuel supply system embodying the invention
the invention to provide a cable connection which can
and including a motor-pump unit mounted in a gasoline
safely be connected and disconnected in such a fuel
tank and having delivery and electrical connections
tank, which will operate reliably in such environment, 45 through a cover plate on the top of the tank;
and in which the electric cable itself will be sealed and
FIG. 2 is a vertical section through the electrical con
protected from attack :by the vfuel and from the entrance
nector ?tting on the cover plate;
of fuel and moisture into the cable, and especially from
FIG. 3 is an axial section through the receptacle and
the entrance of fuel or moisture into the interstices be
plug connection to the motor;
tween the strands of a ?exible multiple-strand conductor 50
FIG. 4 is an exploded view of the electrical plug
in such a cable.
and cable construction; and
In accordance with the invention as applied to a sub
FIG. 5 is a side elevation of an assembled plug, with
merged gasoline fuel-pump motor having a sealed hous
a corner portion broken away and shown in section.
ing, the motor housing is provided with a receptacle
In the gasoline fuel supply system shown in FIG. 1,
having an outer sleeve to be connected at electrical ground 56 a motor-pump unit 10 is mounted in a tank 12 whose top
potential and an inner connector prong supported and
wall 14 is provided with an access opening closed by a
insulated therefrom, preferably by a hermetically seal
cover plate 16. The motor-pump unit 10 is of the type
ing ring of fused material. The prong provides a live
disclosed in said Clymer application Serial No. 775,446,
lead through the wall of the motor housing. The fuel
and comprises a motor sealed within a housing compris
tank is preferably provided with a similar receptacle, in 60 ing a pair of hat-shaped shells 20 and 21 which are com
which the prong provides a sealed live lead through the
pletely imperfora'te and which have rims at their adjoin
wall, for example, the cover of the tank. Electrical
ing ends which are welded together to hermetically seal
connection is made to the motor by a cable having an
the motor housing and form a mounting flange 22 cir
inner conductor such as a multiple-strand wire, an insulat~
cumferentially about the motor housing mid-way of its
ing sheath which may be protected ‘by an outer sleeve of 65 height. The bottom wall of the lower hat-shaped shell
3,092,290
4
wire. The strands of the projecting end of the wire 60
21 forms an imperforate diaphragm through which the
motor is magnetically coupled to a pump assembly 24.
This is secured in place below the sealed motor housing
by means of a skirt 26 ?xed as by welding to the lower
shell 21 and provided with tongues 28 which are bent
into notches 30 in spacing posts on the pump casing.
The pump discharges through a nipple 32 and a ?exible
hose 34 which is connected to an outlet ?tting 33 leading
outside the tank and here shown as mounted in the cover
plate 16. The fuel line 35 is connected to this outlet 10
?tting.
are separated and bent back over the central sleeve of
the eyelet 80. A terminal prong in the form of a clip
82 is then pressed over the bent-back strands and the
central sleeve of the eyelet 80, and this connection is then
soldered together. The resilient grommet 78 is now moved
against the base ?ange of the eyelet 80 and the resulting
end assembly is pressed into the thimble 76. The solder
joint seals the interstices between the wire strands and
forms a solid imperforate connection between the wire
and the ?ange of the eyelet.
A plug body 84 is inserted in the shell 70, and held
The motor-pump unit is removably mounted in a mount
in
place by crimping the shell 70 into a pair of diamet
ing stand 36 which is ?xed to the bottom of the tank 12,
rically
opposite notches 86 in the body 84. The plug
and is releasably clamped in such stand by a circumfer
ential clamp embracing a mounting collar received about 15 body 84 is of rigid insulating material, such as molded
nylon. It has an inner bore which closely embraces and
the mounting ?ange 22 formed by the welded-together
supports the inner end of the terminal clip 82, and has
rims of the two shells 20' and 21. Such collar desirably
an end face which presses against the base ?ange of the
includes a layer of resilient material, and it is noted that
eyelet ‘80. It thus serves to press the base ?ange against
this will electrically insulate the motor housing from the
stand.
20 the resilient grommet 78 to retain such grommet in place
and maintain sealing contact between the eyelet ?ange
The electrical connection for the motor of the motor
and the grommet. The grommet sealingly engages both
pump unit 10 is by means of a cable 40 having plug
against the ?ange and against the outer surface of the
connectors 41 at its opposite ends, one received in a
insulation
62 and sleeve 64 surrounding the wire 60, and
receptacle 42 on the motor and the other in a receptacle
100 carried by the cover plate 16. The motor housing 25 completely closes the end of the wire to prevent the en
trance of gasoline or moisture to the interior of the insul
receptacle 42 is shown in FIG. 3, and comprises an outer
ated wire or to the interstices between the twisted strands
of the conductor 60.
The body 84 also has a central cavity 90 surrounding
supported and hermetically sealed, as by an insulating
free end of the terminal clip 82, and the walls of
ring of glass fused to both the pin and the sleeve. The 30 the
such cavity 90 extend some distance outward beyond the
sleeve 44 is mounted against the side of the upper shell
end of the terminal clip. The body also contains an
20 of the motor housing, with its neck 46 projecting into
annular socket 92 for the reception of a spring 94 which
the motor enclosure, and is sealingly ?xed in place, as
in unstressed condition stands above the end of the plug,
by welding or soldering or both. For convenience of
as is shown in FIG. 5. For connecting and retaining
element shown as a sleeve 44 having a reduced neck 46
in which a connector prong in the form of a pin 48 is
assembly, the pin 48 is a hollow pin, and the lead wire
for the motor is passed outward through such hollow pin
the plug in the receptacle 42, the shell 70 is slotted at
diametrically opposite points to form tongues 96 which
48 and its outer end is secured by a solder joint 52 which
are bent outward to form the lugs of a bayonet joint,
seals the hollow pin 48. The receptacle sleeve 44 forms
and the sleeve 44 is provided with L~shaped notches 98
a ground lead for the motor, and the pin 48 forms a live 4.0 to receive and retain such lugs 96. Upon engagement
lead extending in insulated and hermetically sealed re
of the bayonet joint, the spring 94 is compressed, and
lation through the completely and hermetically sealed
its reaction acts to maintain a ?rm mechanical and elec
motor housing.
trical connection between the shell 70 of the plug and
The cable 40 consists of a central conductor 60 which
the sleeve 44 of the receptacle. The spring reaction also
is desirably in the form of a ?exible twisted-strand wire.
urges the body 84 inward against the ?ange of the eyelet
This is covered with an insulating sheath 62, desirably
‘80, and urges this against the grommet 78, to maintain the
of an insulating material such as vinyl plastic which is
scaling function of the grommet.
relatively stable in the presence of gasoline. For further
protection against the environment in a gasoline tank,
The plug at the opposite end of the cable 40 is of
the same construction and arrangement as described
the insulated wire is desirably enclosed in an outer sleeve 50 above. To receive that plug, a receptacle 100 similar
64, as of nylon, which is highly resistant to gasoline and
to the receptacle 42 is sealingly ?xed in the cover plate
to mechanical abrasion. This assembly is enclosed with
16, conveniently by forming a circular boss on the
in a braided-wire armor covering 66 which gives mechan
shoulder wall of the receptacle and projection welding
ical protection and serves as an electrical ground con
this to the cover. In the receptacle 100, the central
55 prong is in the form of a solid pin 102 without the hole
nection.
The plug connector comprises an outer element shown
of the hollow pin 48. The receptacle 100 includes a
as a shell 70 adapted to be telescopically received in the
sleeve 105 having a neck 106 extending through the
sleeve 44 of the receptacle. The shell 70 is formed to
cover plate 16, and the pin 102 is ?xed therein by a her
provide a shoulder 7'1 and a conical seat portion 72 and
metically sealing support such as ‘a ring \101 of glass
a reduced neck portion 74. As is best shown in FIG. 4, 60 fused to the pin 010-2 and to the neck 106. The pin
the outer braid 66 of the cable is expanded about an
extends ‘above the cover plate and is provided with a
internal or thimble 76 and clamped with a press ?t be
threaded or otherwise serrated end 103.
tween such thimble and the inner surfaces of the neck
The receptacle 100 forms part of a connector ?tting
74, the conical seat 72, and the shoulder 71, desirably
on the cover plate 16 of ‘the fuel tank 12. Such ?tting
with the end of the braid extending beyond the radial
comprises a base 112 seated ‘on the top face of the plate
?ange of the thimble. The thimble 76 forms a seat for
16 and having an opening 113 which receives the upper
the reception of a resilient grommet 78 formed of an
portion of the neck 106 of the receptacle and forms a
elastomer material resistant to gasoline. This is placed
cavity about the upstanding serrated end 103 of the con
nector pin ‘102. A sealing grommet 108 surrounds the
about the end portion of the nylon sleeve 64 and the in
sulating sheath 62 of the wire 60. The insulation is 70 base of the pin end 103', and a gasket 110 lies between
the oover plate 16 and the base of the ?tting, to block
stripped from a projecting short length of the wire 60,
the entrance of moisture. The upper surface of the
and an eyelet 80 is placed over such stripped wire. Such
base 112 of the ?tting contains a horizontal semi-cylin
eyelet 80 has a broad circular base which seats against
the end of the insulation 62 and nylon sleeve 64, and 75 drical groove 116 connecting with the opening 113 to
form a seat for an insulated terminal clip 120 of a supply
has a central sleeve portion received about the stripped
3,092,290
wire 122. Such wire is of any usual type having a central
conductor and an insulating sheath. The terminal clip
120 is generally L-shaped and includes a horizontal leg
which is gripped to the lead wire sheath and mechanically
connected or soldered to the lead-wire conductor.
The
vertical leg of the clip resiliently grips the serrated end
103 of the pin 102. An insulating cover 121 is molded
about the clip and forms an L-shaped body which ?ts in
the seat 116 and opening 113 of the base 112.
A cover member 114 ?ts on the base 112 and de?nes a
semi-cylindrical groove 118, which is complementary to
the groove 116 and which ?ts over the upper surface of
the insulating cover 121, to retain and form an enclosure
and the tank or to the outside of the tank, and even the
capillary passages in the cable conductor itself do not
form a leakage path and are themselves sealed. Such safe
and sealed conductive path is wholly enclosed and mechan
ically and electrically protected by the grounded receptacle
shells and the armor braid 66.
I claim as my invention:
1. Electrical connector means for a motor-pump unit
having electrical and ground leads and mounted in a fuel
tank such as the gasoline tank of an automotive vehicle,
comprising a tank connector ?tting, an electrical cable
for interconnecting said ?tting and said motor-pump unit
within the tank and having an inner conductor and an
insulating
sheath and an outer conductive cover, a con
The base and cover desirably have inter?tting ?anges 15
nection between one end of said cable and said motor
about their periphery, and at one end form a socket for
about the terminal clip and its connection to the pin 102.
unit and a connection between the other end of said cable
and said ?tting, at least one of said connections being
a separable plug and receptacle connection comprising
the terminal ?tting in assembled relation and tightly 20 outer elements respectively connected to said cable cover
and to a ground lead for establishing an electrical ground
against the cover plate. The bolts 127 are desirably
connection for said unit, said plug and receptacle con
welded to the cover plate to maintain the same as an
a sealing grommet 124 where the lead wire 122 emerges
from the ?tting. A strap 126 overlying the cover 114
is bolted to the tank cover plate 16 by bolts 127 and holds
imperforate sealed closure for the tank.
nection also comprising interengageab-le prong elements
ing such connection, the plug 41 is inserted in the re
ceptacle 42. Its outer shell 70 makes initial mechanical
and electrical contact with the sleeve 44 of the receptacle,
to said motor-pump unit, said outer elements being con
structed and arranged to make initial electrical contact
within and insulated from said outer elements and respec
In use, the cable 40-41 may be connected to the
motor-pump unit 110 and cover plate 16 either before or 25 tively connected to the inner conductor of the cable and
to an electrical supply lead for establishing a live supply
after the motor-pump is mounted in the tank. In mak
and to form an enclosure about the point of contact of
said
inner prongs prior to electrical engagement of said
and the construction and arrangement of the parts is 30
prongs during relative engagement movement of the plug
such that this connection is made before engagement oc
and receptacle connection.
curs between the central prongs 48 and 82 of the receptacle
2. Electrical connector means for a motor-pump unit
and plug. As the plug is advanced into the receptacle,
having a motor with electrical supply and ground leads
the approaching ends of the prongs are ?rst enclosed
within the outer electrically-connected metallic shell 70 35 and mounted in a fuel tank such as the gasoline tank of
an automotive vehicle, comprising a tank ?tting, an elec
and sleeve 44, and within the central cavity 90 of the plug
body 84. When the prongs ?nally make contact, they
do so only within a protective enclosure, including an
trical cable for connecting said ?tting to said unit and
having an inner conductor and an insulating sheath and
an outer conductive cover, a receptacle on said motor hav
outer metallic enclosure which (if the opposite end of
ing an outer sleeve electrically connected to the motor
the cable is connected) forms an electrical ground con 40 ground and having a prong within and insulated from
nection. A corresponding action occurs when the plug
said ground sleeve and electrically connected to the motor
is disconnected from its receptacle, in that the central
supply lead, a plug on said cable for separable engage
prongs break contact while their separating ends are en
ment with said receptacle, said plug comprising an outer
closed within the cavity 90 and the electrically-con
shell for telescopic engagement with said outer recep
nected shell 70 and sleeve 42, and while such shell and 45 tacle sleeve, means for locking said shell and sleeve in
sleeve are still in mechanical and electrical contact. A
engaged relation, said shell being mechanically and elec
similar action occurs during connection and disconnection
trically connected to said conductive cable cover for
of the plug 41 with the receptacle 100 on the cover plate.
physically connecting the cable to the motor and forming
The outer wire braid 66 of the cable provides the elec
a ground connection for the motor, said plug also com
trical ground connection for the motor of the motor 50 prising a prong within and insulated from said shell and
pump unit 10, and mechanically and electrically protects
the inner supply conductor 60 and its insulation. The
plug construction at the ends of the cable seal the ends
of the wire 60 and its insulating sheath and sleeve 62-64,
electrically engaged with said receptacle prong when said
plug is engaged with said receptacle, said plug prong
being connected to said cable conductor to form a supply
connection for said motor, said shell and sleeve being
to seal out of the cable gasoline and moisture in the tank. 55 constructed and arranged to make initial electrical con~
The cable is thus isolated from the fuel tank and especi
tact and to form an enclosure about the point of contact
ally from the interior of the sealed motor casing and from
of said prongs prior to electrical engagement of said
the exterior of the fuel tank, so that it cannot form even
prongs during engagement movement of said plug and
a capillary passage through the sealed enclosure of the
receptacle.
motor.
60
3. Electrical connector means according to claim 2 in
The connector ?tting 112-114 on the tank may be
which said plug contains sealing means sealed to the cable
on a ?xed part of the tank or preferably on a removable
sheath and to the cable conductor whereby to prevent the
cover plate as shown. Its receptacle 100 seals the tank
entrance of moisture therebetween.
wall with a hermetic seal, while its pin 102-103 pro
4. Electrical connector means according to claim 2 in
vides an insulated conductor through such wall and its 65 which said plug contains a sealing grommet sealingly
shell provides a ?rm ground connection to the tank.
surrounding the cable sheath and an eyelet sealed to the
The receptacle housing ‘112-114 and its associated ele
conductor of said cable, said eyelet having a ?ange seal
ments mechanically maintain, enclose, and protect the
ingly engaging said grommet, whereby to seal the interior
releasable clip connection between the lead wire 122 and
of the cable against the entrance of liquid.
the pin 102-103.
70
5. Electrical connector means according to claim 4 in
In use in operation of the automobile, the electrical
which the conductor is a twisted-strand wire having inter
connection means forms a safe electrical conductive path
stices between the strands, and said eyelet is soldered to
by way of the pins 102-103, the cable conductor 60,
said wire by a solder joint which seals the interstices.
and the pin 48 to the hermetically sealed interior of the
6. An electric connection adapted for use in a fuel
motor, with no chance of any leakage either between it 75 tank such as an automotive gasoline tank, comprising a
3,092,290
7
receptacle having an outer sleeve and an inner prong,
an electric cable having an inner twisted-strand conductor
and an insulating sheath and an outer ?exible conductive
covering, and a plug for connecting said cable to said
8
tioned and arranged relative to said connector prong to
make initial electrical contact with the sleeve of the re
ceptacle prior to electrical engagement of the connector
prong with the receptacle prong.
12. An electric connection for a pump motor mounted
in a tank, comprising a receptacle carried by a tank wall
and having an inward extending sleeve and a central prong
on said shell to which said cable cover is mechanically
insulated and supported therein, a cable having an inner
and electrically connected, a sealing grommet within said
conductor and an insulating sheath and an outer conduc
shell and having a central opening in which said insu
tive cover, and a plug separably connecting said cable
10
lating sheath is sealingly received, the cable conductor
to said receptacle and having an outer shell electrically
extending therebeyond, a ?ange mechanically connected
connecting the cable cover ‘to the receptacle sleeve and
and sealed to said conductor and having sealed relation
a connector prong electrically connecting the cable con
receptacle, said plug comprising an outer shell tele
scopically engageable with said sleeve, a reduced neck
with said grommet, whereby liquid is excluded from the
interior of said sheath, a connector prong connected to
said conductor, and a supporting body received within
said shell and supporting said connector prong in position
for engagement with said receptacle inner prong.
ductor to the receptacle prong, said receptacle prong pro
jecting through the tank wall to form a connector stud,
a ?tting base sealed against said wall about stud and
forming a seat, a lead-wire connector clip seated in said
seat and engaged with said stud, and a ?tting cover en
gaged over said base to enclose and secure said lead-wire
engaged with said stud, and a mechanical means to
said ?ange, and said body engages said ?ange to retain 20 clip
secure the cover and base together and to the tank wall.
the same in sealing engagement with said grommet and
13. An electrical connection for a pump motor mount
to secure said prong against axial displacement.
cd in a tank, comprising a cover member for attachment
8. An electrical connector according to claim 6 in
to the tank, a receptacle carried by said member for re
which said body forms a closely ?tting cavity about said
ceiving a motor-connecting plug, said receptacle being in
7. An electrical connector according to claim 6 in
which said connector prong is mechanically connected to
connector prong, and said plug shell and receptacle sleeve
are constructed and arranged to make initial electrical
contact and to position said body cavity to enclose said
prongs prior to electrical engagement of said prongs dur
ing relative engagement movement of the plug and
the form of an outer sleeve having a reduced neck, a
connector prong insulated and supported in said reduced
neck by a ring of insulating material, said cover member
having an opening therethrough and said receptacle be
ing sealingly ?xed to said member with its prong-sup
30
receptacle.
porting neck extending through said opening with the
9. An electrical connector according to claim 6 with
end of the prong therein exposed above said cover mem
ber, a connector-?tting base carried by said cover mem
ber about said prong end, and a connector-?tting cover for
on said body in a direction to separate the same, said
spring force also acting to press said body against said 35 said base, said base and ?tting cover de?ning an enclo
sure for the reception of a lead-wire clip engaged with
?ange to maintain sealing engagement between the ?ange
the addition of means to lock the receptacle sleeve and
plug shell against axial separation, and a spring acting
and grommet.
10. An electrical connector adapted for such use as in
an automotive gasoline tank, comprising a receptacle hav
said prong end, and means to retain said ?tting assembled
to said cover.
14. An electrical connection as de?ned in claim 13, in
ing an outer sleeve and an inner prong, an electric cable 40 which said ?tting base de?nes an upwardly open cavity
having an inner multiple-strand conductor and an insulat
ing sheath and an outer braided wire cover, and a plug
for releasably connecting said cable to said receptacle,
said plug comprising an outer shell telescopically engage
able with said sleeve, a reduced neck on said shell, a
press-‘?tted ferrule securing the end of said wire braid to
said reduced neck, said assembly forming a conical seat
about said prong end including a cylindrical portion sub
stantially concentric with said prong and a seat portion
extending ‘laterally therefrom, and said ?tting cover forms
a downwardly open cavity complementary to said base
cavity for the reception and retention of the lead-wire
clip, and said base and cover also form complementary
portions of a passage from the exterior to the interior
of the ?tting to pass the lead wire.
at the necked end of said shell and within which the end
15. An electrical connection for use under hazardous
of the cable sheath extends, a resilient grommet ?tting
about said sheath and seated in said seat, a connector 50 conditions such as for a pump motor mounted in a fuel
tank, comprising a receptacle having an outer sleeve and
prong and base ?ange secured to the end of the cable
an inner axial prong in ?xed insulated relation therein,
conductor with the ?ange seated against the grommet, and
an electrical cable having an inner conductor and an in
a body secured in said shell about said prong and having
sulating sheath and an outer conductive and protective
an end face retaining said ?ange and grommet in place.
11. An electric connection adapted for use in a fuel 55 cover, a plug on said cable for separably connecting the
same to the receptacle, said plug comprising an outer
tank such as an automotive gasoline tank, comprising an
cylindrical shell telescopically engageable with said re
electric cable having an inner conductor and an insulating
ceptacle sleeve and having a shouldered portion at the
sheath and an outer conductive cover, and a plug for
cable~receiving end thereof, means mechanically and elec
connecting said cablet to a receptacle having an outer
sleeve and an inner prong, said plug comprising an outer 60 trically connecting said cable cover to the shouldered
shell telescopically engageable with the sleeve of said
receptacle, a reduced neck on said shell to which said
cable cover is mechanically and electrically connected,
an insulating grommet within said shell and having a
portion of the sleeve, an insulating grommet received
about the sheath of said cable within said plug and posi
tioned for retention therein by said shouldered portion,
a ?ange and axially extending plug prong mechanically
central opening in which said cable sheath is sealingly 65 secured and electrically connected to each other and to
the conductor of said cable with the ?ange seated against
received, a ?ange mechanically and sealingly connected
the inner face of said grommet, said plug and receptacle
to said conductor and axially positioned by said grommet
prongs being telescopically engageable to electrically in
in sealing engagement therewith, a connector prong con
nected to said conductor, and an insulating body axially
terconnect the same, an insulating plug body received in
retaining said ?ange against said grommet and supporting 70 said shell, supporting said plug prong for engagement with
said connector prong within said shell in position for en
said receptacle prong, and axially engaging said prong
gagement with the prong of ‘the receptacle, said body
connected ?ange in a direction to press the same toward
forming a cavity about the connector prong and extend
the grommet and the shouldered end of the plug shell, a
ing therebeyond to enclose the point of contact of such
bayonet connection between said plug shell and said re
prong with the receptacle prong, said sleeve being posi<
3,092,290
9
10
ceptacle sleeve for locking the same against axial separa
tion, and a coil spring positioned between a ?xed por
tion of said receptacle and the plug body to thrust said
body against said prong ?ange in a direction to separate
said plug prong from said receptacle prong and to sepa
rate the plug shell from the receptacle sleeve, said prongs
being relatively shorted than said shell and sleeve to cause
References Cited in the ?le of this patent
UNITED STATES PATENTS
the latter to electrically engage prior to the prongs on
assembly and subsequent to the prongs 0n separation of
said plug and receptacle.
1,304,075
Lofgren _____________ __ May 20, 1919
2,409,732
2,5 30,357
2,885,126
Browne et a1 __________ __ Oct. 22, 1946
Kateley _____________ _.. Nov. 14, 1950
Hudson ______________ __ May 5, 1959
FOREIGN PATENTS
10
1,015,896
France ______________ __ Oct. 27, 1952
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