U.S. patent number 3,814,148 [Application Number 05/273,217] was granted by the patent office on 1974-06-04 for vehicle fueling apparatus.
This patent grant is currently assigned to Atlantic Richfield Company. Invention is credited to Wolfgang J. Wostl.
United States Patent |
3,814,148 |
Wostl |
June 4, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
VEHICLE FUELING APPARATUS
Abstract
A system for providing maintenance service to vehicles. A
vehicle servicing unit is provided with a plurality of fuel
sources, means for supplying fuel from the sources to vehicles, and
means for automatically registering billing data. A vehicle to be
serviced is equipped with an electrical connector including pins
that are wired to give a coded identification number, pins that are
wired to give a coded fuel-type indication, and pins to activate
the system, and a mating connection is provided on the servicing
unit. The system has all electrical components enclosed in a
pressurized cabinet to ensure that fuel vapors cannot get into the
area adjacent those components. The system permits supplying of
other items such as lubricating oil, and the billing circuitry
ensures that the correct charge is made for such items so that a
customer is not billed for items delivered to a previous customer.
Means are also provided for withdrawing fuel vapors and overflow
liquid fuel from the area adjacent the delivery nozzle to a
disposal, rather than allowing them to escape to the
atmosphere.
Inventors: |
Wostl; Wolfgang J. (South
Holland, IL) |
Assignee: |
Atlantic Richfield Company (New
York, NY)
|
Family
ID: |
23043012 |
Appl.
No.: |
05/273,217 |
Filed: |
July 19, 1972 |
Current U.S.
Class: |
141/98; 141/232;
141/392; 705/413; 137/234.6 |
Current CPC
Class: |
B67D
7/228 (20130101); B60P 3/2255 (20130101); G06Q
50/06 (20130101); G07F 13/025 (20130101); B67D
7/0478 (20130101); Y10T 137/3802 (20150401) |
Current International
Class: |
B67D
5/22 (20060101); B60P 3/22 (20060101); B67D
5/01 (20060101); B67D 5/04 (20060101); B67d
005/00 () |
Field of
Search: |
;141/1,98,231,232,233,248,266,279,284,392 ;222/192 ;137/234.6
;235/151,151.2,151.34 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Bell, Jr.; Houston S.
Attorney, Agent or Firm: Clough; Thomas J.
Claims
What is claimed is:
1. Apparatus for supplying fuel to a vehicle having a fuel storage
tank with an inlet and recording sales data pertaining to the fuel
supplied, said apparatus comprising:
a. Identification means adapted for attachment to a vehicle and
including:
1. vehicle identity means for identifying a particular vehicle to
which the identification means is attached; and
2. fuel-type identity means for identifying the type of fuel to be
supplied to the particular vehicle; and
b. Vehicle servicing means including:
1. identification sensing means adapted for connection to said
identification means and having:
i. vehicle identity sensing means for sensing the identification of
the particular vehicle identified by said identification means;
ii. fuel-type identity sensing means for sensing the type of fuel
identified by said identification means;
2. fuel supply means for supplying fuel to a vehicle fuel storage
tank in response to simultaneous sensing by said fuel-type identity
sensing means of the type of fuel identified by a fuel-type
identity means identifying the type of fuel within the fuel supply
means and sensing by said vehicle identity sensing means of the
identity of a vehicle identified by a vehicle identity means;
and
3. recording means associated with the fuel supply means and
connected to the identification sensing means for recording the
identity of a vehicle sensed by the vehicle identity sensing means,
the type of fuel sensed by the fuel-type identity sensing means,
and the amount of fuel supplied by said fuel supply means.
2. Apparatus as claimed in claim 1 in which:
said identification means includes a first connector portion
including binary coded connector pins, fuel-type connector pins, an
excitation connector pin and circuit means connecting said
excitation pin to selected ones of said binary coded connector pins
and said fuel-type pins to provide a binary coded representation of
a vehicle identification number and of a fuel-type number; and
said identification sensing means includes a second connector
portion adapted to mate with said first connector portion and
including connector pins adapted to mate with said first connector
portion pins for supplying excitation to said first connector
portion excitation pin and for sensing the binary coded
representation of the vehicle identification number and of the
fuel-type number.
3. Apparatus as claimed in claim 2 in which said first connector
portion includes an additional connector pin and in which said
second connector portion includes a microswitch adapted to be
actuated by said additional connector pin when said second
connector portion is mated with a first connector portion and in
which said identification sensing means includes excitation means
responsive to actuation of said microswitch for supplying
excitation through said second connector portion to said first
connector portion excitation pin.
4. Apparatus as claimed in claim 3 in which said identification
sensing means further includes an air supply responsive to
actuation of said microswitch for supplying air under pressure to
the interior of a connector formed by the mating of said second
connector portion and a first connector portion.
5. Apparatus as claimed in claim 4 in which said excitation means
includes means for delaying the supplying of excitation through
said second connector portion to said first connector portion
excitation pin until sufficient air has been supplied to the
interior of the connector to flush the connector interior.
6. Apparatus as claimed in claim 3 in which said identification
sensing means includes means for deactivating said excitation means
following the sensing by said identification sensing means of a
vehicle identity to terminate excitation through said second
connector portion to said first connector portion excitation
pin.
7. Apparatus as claimed in claim 1 in which said recording means
includes printing means for printing a bill for fuel supplied to a
vehicle.
8. Apparatus as claimed in claim 1 in which said recording means
includes additional charge indication means for indicating a charge
for additional items supplied to a vehicle.
9. Apparatus as claimed in claim 8 in which said recording means
includes means for printing a bill for fuel supplied to a
vehicle.
10. Apparatus as claimed in claim 9 in which said printing means
includes means for inhibiting the printing of a bill until receipt
of an input from said additional charge indication means.
11. Apparatus as claimed in claim 1 further comprising a cabinet
substantially enclosing at least a portion of the apparatus, and
pressurization means for supplying air under pressure to the
interior of said cabinet to prevent entry of vapor thereinto.
12. Apparatus as claimed in claim 11 further comprising means for
sensing pressure within said cabinet and means for deactivating
said fuel supply means upon sensing of pressure within said cabinet
below a preset pressure.
13. Apparatus as claimed in claim 1 in which said fuel supply means
includes:
a nozzle including a nozzle inlet, a nozzle outlet, a nozzle
housing coupling said nozzle inlet and said nozzle outlet, and
control means for controlling fuel flow from said nozzle inlet
through said nozzle housing to said nozzle outlet;
closure means adjacent said nozzle outlet for substantially closing
a vehicle fuel tank filler pipe inlet, with the nozzle outlet
within the filler pipe inlet for delivery of fuel thereinto;
and
means defining a fluid path communicating through said closure
means and adapted for connection to a fuel disposal for providing
fluid communication from an area adjacent said nozzle outlet to the
fuel disposal.
14. Apparatus as claimed in claim 13 in which said closure means
comprises resilient plug means and biasing means for biasing said
resilient plug means toward said nozzle outlet.
15. Apparatus as claimed in claim 14 in which said defining means
includes a first shell member and said resilient plug means
includes a second shell member cooperating with said first shell
member to provide a rotational interface between said defining
means and said closure means.
16. Apparatus as claimed in claim 13 in which said defining means
comprises a bellows encircling a portion of said nozzle, first
fluid passage means for providing fluid communication from the area
adjacent said nozzle outlet to the interior of said bellows, and
second fluid passage means connected to said bellows and adapted
for connection to a fuel disposal for providing a fluid path from
the interior of said bellows to the fuel disposal.
17. Apparatus as claimed in claim 16 in which said closure means
comprises a resilient plug means connected to said bellows to be
biased by said bellows toward said nozzle outlet.
18. Apparatus as claimed in claim 17 in which said plug means
includes a first shell member and said resilient plug means
includes a second shell member cooperating with said first shell
member to provide a rotational interface between said bellows and
said resilient plug means.
19. Apparatus as claimed in claim 13 further comprising a hook
connected to said nozzle and adapted to engage a vehicle fuel tank
filler pipe for retaining said nozzle outlet within the filler
pipe.
20. Apparatus as claimed in claim 13 further comprising a fuel
disposal connected to said defining means for receipt of fuel
therefrom.
21. Apparatus as claimed in claim 20 further comprising a vehicle
having an internal combustion engine and transporting said
apparatus, and in which said internal combustion engine comprises
said fuel disposal.
22. Apparatus for supplying fuel to a vehicle having a fuel storage
tank with an inlet and recording sales data pertaining to the fuel
supplied, said apparatus comprising:
a. a first connector portion adapted for attachment to a vehicle
and including binary coded connector pins, an excitation connector
pin and circuit means connecting said excitation pin to selected
ones of said binary coded connector pins to provide a binary coded
representation of a vehicle identification number for identifying a
particular vehicle to which the first connector portion is
attached; and
b. vehicle servicing means including:
1. a second connector portion adapted to mate with said first
connector portion and including connector pins adapted to mate with
said first connector portion pins to supply excitation to said
first connector portion excitation pin and to sense the binary
coded representation of the vehicle identification number for
sensing the identification of the particular vehicle identified by
said first connector portion;
2. fuel supply means for supplying fuel to a vehicle fuel storage
tank in response to sensing by said second connector portion of the
identity of a vehicle identified by a first connector portion;
and
3. recording means associated with the fuel supply means and
connected to the second connector portion for recording the
identity of a vehicle sensed by the second connector portion and
the amount of fuel supplied by said fuel supply means.
23. Apparatus as claimed in claim 22 in which said first connector
portion includes an additional connector pin and in which said
second connector portion includes a microswitch adapted to be
actuated by said additional connector pin when said second
connector portion is mated with said first connector portion and in
which said vehicle servicing means includes excitation means
responsive to actuation of said microswitch for supplying
excitation through said second connector portion to said first
connector portion excitation pin.
24. Apparatus as claimed in claim 23 in which said vehicle
servicing means further includes air supply means responsive to
actuation of said microswitch for supplying air under pressure to
the interior of a connector formed by the mating of said second
connector portion and a first connector portion.
25. Apparatus as claimed in claim 24 in which said excitation means
includes means for delaying the supplying of excitation through
said second connector portion to said first connector portion
excitation pin until sufficient air has been supplied to the
interior of the connector to flush the connector interior.
26. Apparatus as claimed in claim 23 in which said vehicle
servicing means includes means for deactivating said excitation
means following the sensing by said second connector portion of a
vehicle identity to terminate excitation through said second
connector portion to said first connector portion excitation
pin.
27. Apparatus as claimed in claim 22 further comprising a cabinet
substantially enclosing at least a portion of the apparatus, and
pressurization means for supplying air under pressure to the
interior of said cabinet to prevent entry of vapor thereinto.
28. Apparatus as claimed in claim 27 further comprising means for
sensing pressure within said cabinet and means for deactivating
said fuel supply means upon sensing of pressure within said cabinet
below a preset pressure.
Description
The present invention pertains to the periodic maintenance of
vehicles. More particularly, the present invention pertains to a
vehicle servicing unit which can readily be provided in the
vicinity of vehicles to be serviced, for example in a parking lot,
to provide selected vehicles with a supply of essentials such as
fuel and lubricant.
Supplying necessary items such as fuel and lubricant to motor
vehicles is a minor yet time consuming chore which the users of
motor vehicles frequently overlook or postpone until such time as
the supply of such necessities is almost exhausted and must be
replenished before further use can be made of the vehicle. Thus,
for example, a motorist frequently drives his vehicle until the
fuel supply is almost exhausted, making it absolutely necessary
that the motorist obtain additional fuel before continuing to use
the vehicle. Frequently the motorist is about to undertake some
task which should have his immediate time and attention, and thus
the delay in obtaining supplies such as fuel can be a serious
problem rather than simply an inconvenience. Large numbers of
people commute to work every day in motor vehicles. Often these
vehicles are parked for a considerable length of time in a parking
area near the work place of the user. The vehicle operator is
considerably aided if his vehicle can be supplied with such things
as fuel during the time that it is parked and while he is absent.
Not only does this ensure against running out of fuel, it also
eliminates the necessity of stopping for fuel while commuting. U.S.
Pat. No. 3,650,303 issued Mar. 21, 1972, discloses a system for
providing supplies and minor maintenance to vehicles parked, for
examplein a parking lot, and while the owners of such vehicles are
absent. The disclosure of that patent is incorporated herein by
reference.
The present invention relates to improvements on the system
disclosed in U.S. Pat. No. 3,650,303. Thus the present invention
relates to an apparatus for providing in the vicinity of the
vehicles requiring service a vehicle servicing unit including a
fuel supply and means for identifying the vehicle to which fuel is
supplied, means for ensuring that liquid fuel and fuel vapors do
not escape to the atmosphere while vehicles are being serviced. In
addition, the system can incorporate intrinsically safe circuits
and can provide a non-hazardous operating environment.
In accordance with the present invention, a vehicle to be serviced
is identified by a vehicle identification number which is encoded
into a connector through which a connection must be established
before operation can commence. That connector further identifies
the type of fuel which is to be provided to a particular vehicle.
The vehicle servicing unit, including the connector, incorporates
safety features providing intrinsically safe components in a
non-hazardous environment. Thus, for example, the fuel nozzle
includes means for withdrawing overflow liquid fuel and fuel vapor
from the vicinity of the nozzle outlet to a fuel disposal, rather
than allowing them to escape to contaminate the environment. In
addition, the vehicle-identifying connector and the servicing unit
control console include features assuring that flammable vapors are
kept from areas around electrical connections when power is
provided thereto.
These and other aspects and advantages of the present invention are
more apparent in the following detailed description and claims,
particularly when considered in conjunction with the accompanying
drawings. In the drawings:
FIG. 1 illustrates the servicing of vehicles within an area by
means of a vehicle servicing unit in accordance with the present
invention;
FIGS. 2 and 3 depict a control panel suitable for use in a system
in accordance with the present invention, with FIG. 3 taken along
line 3--3 of FIG. 2;
FIGS. 4 and 5 depict a vehicle identification device in accordance
with the present invention together with a schematic representation
of one embodiment of a vehicle identification unit suitable for
incorporation into the present invention;
FIGS. 6 and 7 depict a fuel nozzle and hose suitable for use in
accordance with the present invention; and
FIG. 8 illustrates the providing of fuel in accordance with the
present invention in a manner which avoids escape of liquid fuel or
fuel vapors into the atmosphere.
FIG. 1 illustrates a parking lot 10 which is typical of those
encountered in urban centers and work areas. As shown therein, a
number of vehicles 12 are parked in rows 14, generally two vehicles
deep with an open aisleway 16 between adjacent rows 14.
A vehicle servicing unit 18 is shown in accordance with the present
invention in an aisleway 16 to service the particular vehicles
parked adjacent that aisleway. The servicing unit 18 is preferably
motorized, either as an integral unit or it could be, for example,
mounted behind and connected to a cab-type motoring means. The
servicing unit 18 includes a control panel 20, within a side panel
22 of unit 18, a service panel 24 having fuel delivery means such
as fuel delivery hoses 26 terminating in nozzle 28. Hoses 26 are of
a length sufficient to service the vehicles 12 in the proximate
area, for example a length up to about 20 feet or more. Servicing
unit 18 can also contain a number of accessories such as cans of
lubricating oil, rags, windshield wipers, etc. useful in performing
accessory services to a vehicle. Service panel 24 is illustrated as
including air hose 30, for supplying air to vehicle tires, and
water hose 32, for supplying water for vehicle radiators and
batteries.
Servicing unit 18 can be established in the proximate area of a
particular vehicle 34 which is identified as a member of the
periodic maintenance system, as by means of a sticker 36 located on
the rear of vehicle 34. The nozzle of a fuel delivery hose 26 can
be inserted into the fuel storage tank filler pipe inlet 38 of the
vehicle 34. Adjacent the filler pipe inlet there is a vehicle
identifying means 40 adapted to identify the particular vehicle
being serviced so that when the fuel nozzle of hose 26 is inserted
into the filler pipe, the particular vehicle 34 is automatically
identified to the servicing unit 18. As fuel is supplied to the
vehicle fuel tanks from servicing unit 18 through hose 26 and
nozzle 28, the amount of fuel transferred and its price are
recorded on servicing unit 18, together with the vehicle
identification number.
FIGS. 2 and 3 illustrate a panel suitable for control panel 20 on
vehicle servicing unit 18. Within the side panel 22 of servicing
unit 18 an opening 152 is provided. A transparent window 154 of,
for example, plastic or shatter-proof glass covers opening 152.
Gasket 156 provides a substantially air tight seal between window
154 and side panel 22. Window 154 is held in place by suitable
means such as clamps 158 that are secured to side panel 22 by bolts
160. Control unit 162 is within vehicle servicing unit 18 behind
window 154. By way of example, servicing unit 18 can be equipped to
provide three types of fuel such as leaded gasoline, non-leaded
gasoline, and diesel fuel. FIG. 2 illustrates three fuel buttoms
164, 166, and 168 associated respectively with the three types of
fuel. Quantity indicator 164a and price indicator 164b show the
quantity and price of fuel delivered from the first source
associated with fuel button 164. Likewise, indicators 166a, 166b,
168a and 168b show the quantity and price of fuel delivered from
sources associated with fuel buttons 166 and 168, respectively. If
desired, a single quantity indicator and a single price indicator
could be provided to indicate the delivery from all sources, but of
course this would limit the system to delivery from one source at a
time. If desired, each of the fuel buttons 164, 166 and 168 can be
an actuator/indicator having, for example, three alternative
indications, one showing that the fuel source associated with that
button is available for delivery of fuel, one showing that the
associated fuel source is in use, and one showing that the
associated source has completed delivery of fuel and is ready for
the printing of the associated bill.
Rotary switch 178 is provided to indicate the quantity of lubricant
such as oil, which has been supplied to a vehicle and has fixed
contacts corresponding with 0, 1, and 2 quarts. The servicing unit
attendant operates switch 178 to indicate the quantity of oil that
has been provided to a vehicle. After delivery of fuel and, if
necessary, lubricating oil has been completed, the associated fuel
button 164, 166, or 168 is actuated to initiate printing of a bill.
In addition to giving fuel and lubricant quantity and price, this
bill shows the vehicle identification number. A copy of the bill is
retained within servicing unit 162, while another copy is ejected
through bill dispenser 182 for the attendant to place on the
serviced vehicle, for example under a windshield wiper.
The interior of vehicle servicing unit 18, surrounding control unit
162, is enclosed by wall 174, which closes against the inner
surface of side panel 22. This interior area is pressurized with,
for example, air to prevent entry of fuel vapors to the area
surrounding the control equipment, thus providing a non-hazardous
environment for the control equipment. Quantity indicators 164a,
166a, and 168a, price indicators 164b, 166b, and 168b, and the
indications of the positions for switch 178 do not require openings
through window 154. Controls 164, 166, 168, and 178 and bill
dispenser 182, all require openings through window 154. As
illustrated in FIG. 2, these openings are preferably as small as
possible, while permitting passage of the respective components
therethrough, thus minimizing leakage of the pressurized air from
within vehicle servicing unit 18.
FIGS. 4 and 5 illustrate apparatus for identifying a vehicle being
serviced in accordance with the present invention. Vehicle
identification means 40 is illustrated in FIG. 4 as one-half of an
electrical connector having a plurality of a connector pins
therein. Connector portion 40 is permanently attached adjacent the
fuel tank inlet 38 on a vehicle 34 which is to be serviced by
vehicle servicing unit 18. The other half of the connector 42 is
illustrated in FIG. 5 and is provided adjacent the fuel dispensing
nozzle 28 of vehicle servicing unit 18. The length of the
connection of connector portion 42 to nozzle 28 and the positioning
of connector portion 40 on vehicle 34 make it extremely difficult
or impossible to insert nozzle 28 other than within fuel tank inlet
38 when connector portion 42 is coupled to connector portion
40.
Connector portions 40 and 42 include a plurality of rows of
connector pins. By way of illustration, FIG. 4 shows five rows 44,
46, 48, 50, and 52 of connector pins, with four pins in each row.
Each row of connector pins is utilized to provide a binary coded
decimal representation of a digit of the vehicle identification
number. The connector of FIGS. 4 and 5 can be utilized with a four
digit identification number. Thus, the upper four rows 44-50
correspond respectively to the four digits of that identification
number. Each pin in a given row corresponds with a binary digit.
Thus, each pin in the right-most column 54 of pins on connector
portion 40, represents a binary one, each pin in the next column 56
of pins represents binary two, each in the third column 58 a binary
four, and each in the left-most column 60 a binary eight. The fifth
or bottom row of pins 52 is utlized for other purposes. Thus, in
the illustrative examples of FIG. 4, the left-most pin 62 in the
bottom row is utilized as the common or excitation input. That pin
is electrically connected to each of the pins in rows 44-50 that
are utilized to form the binary coded decimal representation of the
particular vehicle identification number. In the illustrative
example of FIG. 8, the excitation pin 62 is electrically connected
to the pins corresponding with binary eight and binary one in row
44, to the pins corresponding with binary two and binary one in row
48, and to the pin corresponding with binary four in the row 50.
Accordingly, connector portion 40 is coded to represent vehicle
identification number 9034.
The right-most pin 64 of row 52 in connector portion 40 is utilized
to actuate microswith 66 in connector portion 42. Thus, microswitch
66 is closed to complete a circuit between its contacts when
connector portion 42 is securely connected to the connector portion
40 on a vehicle. The contacts of microswitch 66 are enclosed so
that they never are contacted by the atmosphere. Accordingly, all
circuits associated with microswitch 66 are intrinsically safe.
Pins 68 and 70 in row 52 of connector portion 40 are utilized to
identify the type of fuel which is to be supplied to the vehicle to
which the connector portion 40 is attached. Thus, by way of
illustration, these pins can be used to provide a binary coded
representation of the fuel type. For example, if excitation is
supplied only to pin 68, one type of fuel is indicated; if
excitation is supplied only to pin 70, a second type of fuel is
indicated; and if excitation is supplied to both pin 68 and pin 70,
a third type of fuel is indicated. Pins 68 and 70 mate with pins 69
and 71 in connector portion 42 when connector portion 42 is mated
with connector portion 40. Fuel-type identification pins 68-71 thus
assure that the proper type of fuel is supplied to the vehicle, and
so, for example, a vehicle having an engine intended to run on
non-leaded gasoline can not be supplied with leaded gasoline.
Connector portion 42 is coupled by cable 72 to control equipment
within vehicle servicing unit 18. The vehicle identification and
billing circuitry of FIG. 5 includes power source 76 which supplies
power to master control relay 78. Microswitch 66 is connected by
leads 80 and 82 within cable 72 to master control relay 78 so that
when microswitch 66 is actuated by the coupling of connector
portion 42 to a connector portion 40 on a vehicle to be serviced,
master control relay 78 is actuated to provide power to the
remainder of the vehicle identification and billing circuitry.
Actuation of microswitch 66 also causes resetting of the associated
indicators 164a and 164b, 166a and 166b, or 168a and 168b.
Actuation of master control relay 78 provides power through
controller 84 and a lead within subcable 85 of cable 72 to
excitation pin 74 and thus to excitation pin 62 from which the
power is provided to those pins forming the binary coded decimal
representation of the vehicle identification number. All the
vehicle identification pins of rows 44-50 are connected through
subcable 85 to controller 84. Thus, controller 84 is provided with
a binary coded decimal representation of the vehicle identification
number indicated by the pin connections within connector portion
40. This vehicle identification number is applied by controller 84
to recorder-printer 87.
Leads 73 and 75 within cable 72 connect fuel-type identification
pins 69 and 71 to gates 86, 88 and 90 to control the type fuel
which can be supplied. Thus, AND gate is connected to receive
enabling inputs from fuel-type identification pins 69 and 71, while
AND gate 88 is connected to receive an enabling input from
fuel-type identification pin 69 and an inhibiting input from
fuel-type identification pin 71. Similarly, AND gate 90 is
connected to receive an inhibiting input from fuel-type
identification pin 71.
Once controller 84 has recorded the vehicle identification number,
it provides an input to gates 86, 88, and 90. The gate 86, 88 or 90
corresponding with the type of fuel indicated by the connections to
fuel-type identification pins 68 and 70 provides an output. AND
gates 86, 88, and 90 have their outputs connected respectively to
actuate pump motors 92, 94, and 96 on the pumps for the different
fuels available from vehicle servicing unit 18. The pump motor 92,
94 or 96 which receives an output from its associated AND gate 86,
88, or 90 is thus actuated, permitting delivery of fuel from the
associated nozzle 28. Preferably, the connections of gates, 86, 88,
and 90 to pump motors 92, 94, and 96 include circuitry causing an
actuated pump motor to remain actuated after the signals on lines
73 and 75 terminate. If this is so, then once a pump motor is
actuated, excitation is removed from pin 74 in connector portion
42, providing further assurance of safety. The servicing unit
attendant can then provide fuel from the actuated pump to the
vehicle fuel tank. As the fuel is being supplied, the quantity and
price are indicated on indicators 164a and 164b, 166a and 166b, or
168a and 168b, as appropriate.
Oil charge control unit 114 is connected to controller 84 to be
actuated once the vehicle identification number is sensed. Oil
charge switch 178 indicates the quantity of oil which has been
supplied to the vehicle. Common contact 112 of switch 178 is
connected to oil charge control unit 114 to receive excitaton
therefrom. Switch 178 has fixed contacts corresponding with the
number of quarts of oil which might be provided to a vehicle. Thus,
in the illustrative example of FIGS. 2 and 5, the fixed contacts
designated 0, 1, and 2, correspond respectively to zero, 1 or 2
quarts of oil. Each of the fixed contacts is connected to oil
charge control unit 114 which provides a representation of the
price of that quantity of oil to recorder-printer 87.
Once the servicing of the vehicle is completed, the attendant
actuates the fuel button 164, 166 or 168, associated with the hose
26 that has been utilized. A binary coded digital representation of
the fuel quantity and price is then applied from the associated
indicators 164a and 164b, 166a and 166b, or 168b to
recorder-printer 87. If it is desired to be able to pump fuel from
more than one source at a time, recorder-printer 87 includes
appropriate memory circuitry to store the vehicle identification
number associated with each pump or source for merging with the
sales data from the quantity and price indicators at the time the
bill is printed. Recorder-printer 87 includes circuitry which
inhibits its printing operation until a fresh input has been
received from oil control unit 114, thus requiring that the
attendant actuate switch 178, if only by rotating moving contact
112 from the 0 position to another position and back to the 0
position, before a bill can be printed.
Compressor 170 is connected to master control relay 78 for
operation when relay 78 is actuated in response to actuation of
microswitch 66. Air from compressor 170 passes through hose 172 to
the interior of connector portion 42. Thus, when connector portion
42 is mated to a connector portion 40, actuating microswitch 66,
pressurized air is supplied to the connector interior, preventing
entry of fuel vapors. Preferably, excitation is not supplied to pin
74 until after passage of time sufficient to allow flow of air
through the connector equal to about four times the volume of the
connector interior, thus assuringa non-hazardous environment.
Compressor 170 also supplies air to pressurize the interior of
vehicle servicing unit 18, surrounding equipment 162. Pressure
switch 176 senses this pressure, and should the pressure drop,
pressure switch 176 applies a signal to controller 84, deactivating
the system. Compressor 170 additionally supplies air for air hose
30.
FIGS. 6 and 7 depict nozzle assembly 210, suitable for supplying
fuel to vehicle in a manner minimizing or eliminating escape of
fuel vapors and liquid fuel into the atmosphere and in accordance
with the present invention. Assembly 210 includes a fuel nozzle 212
of a standard configuration, including a housing 213 and a delivery
spout 214. Characteristically, delivery spout 214 is slightly
curved, having a convex upper surface 238 adjacent the upper
surface 240 of housing 213. Control handle 222 in housing 213 of
nozzel 212 determines whether fuel is being delivered by the
nozzle. Control handle 222 can be retained in its fuel-delivery
position by retainer 224. It is conventional for such automatic
fuel nozzles to include an orifice 216 near the discharge outlet
218 of delivery spout 214. a tube 220 communicates from orifice 216
to a control mechanism within housing 213 to sense whether orifice
216 is surrounded by gas or by a liquid or solid. With control
handle 222 held in its fuel-delivery position by retainer 224, the
covering of orifice 216 by a liquid or solid results in the control
mechanism within housing 213 causing control handle 222 to be
disengaged from retainer 224. Such automatic fuel nozzles are well
known in the art.
The major portion of delivery spout 214 is enclosed by bellows 230,
the forward end of which terminates in closure plug 221. As seen in
FIG. 6, closure plug 221 includes first shell member 232, which is
preferably integrally formed with bellows 230, liner 236, and
second shell member 229, which is preferably integrally formed with
mounting member 228 to hold plug member 226. First shell member 232
and second shell member 229 are free to move relative to each
other, both longitudinally along the major axis of delivery spout
214, and rotationally, about that major axis. Hook 242 is fastened
to the upper surface of delivery spout 214 to engage the inner lip
of a vehicle fuel tank filler pipe inlet, thus retaining nozzle
assembly 10 in a fuel-delivery position. The resilience of bellows
230 urges first shell member 232 and liner 236 into contact with
second shell member 229, and hook 242 prevents closure plug 221
from coming off the end of delivery spout 214.
Bellows 230, together with its first shell member 232, and mounting
member 228, together with its second shell member 229, can be made,
for example, ofa light gage stainless steel or brass, in which case
liner 236 provides sufficient lubricity to permit free rotational
movement between first shell member 232 and second shell member
229. Shell members 229 and 232 thus provide a rotational interface
between bellows 230 and closure plug 221. Liner 236 can be made of
tetrafluorethylene (available under the trademark Teflon), for
example. Alternatively, bellows 230, first shell member 232,
mounting member 228 and second shell member 229 might be formed of
a material such as cast neoprene so that sufficient lubricity
exists between first shell member 232 and second shell member 229,
in which case liner 236 might be omitted. Preferably, plug member
226 is formed of a somewhat resilient material which is resistant
to fuels, for example, neoprene or tetrafluorethylene. Hook 242 is
mounted on delivery spout 214 in a position which ensures that
orifice 216 is within the vehicle fuel tank filler pipe when hook
242 engages the filler pipe lip so that orifice 216 is normally
surrounded by gas, but is surrounded by liquid fuel to sense when
the fuel tank is filled, whereupon the control mechanism within
housing 213 causes delivery of fuel to be terminated.
Closure plug 221 does not encircle delivery spout 214 tightly.
Instead, a passageway 227 exists between delivery spout 214 and
plug member 226, and a passageway 234 exists between delivery spout
214 and shell members 229 and 232 and line 236. When nozzle
assembly 210 is retained by hook 242 in a fuel-delivery position
with discharge outlet 214 within a vehicle fuel tank filler pipe,
and no one is holding nozzle assembly 210, the weight of housing
213 causes nozzle assembly 210 to rotate about its point of contact
with the vehicle filler pipe. The resilience of bellows 230 causes
plug member 226 to remain snugly against the vehicle fuel tank
filler pipe inlet, and so as housing 213 sags, due to this
rotation, first shell member 232 rotates with respect to second
shell member 229, and delivery spout 214 moves within passageways
227 and 234 as necessary. Should the resiliency of bellows 230 not
be sufficient for this purpose, a spring can be provided,
encircling delivery spout 214 within bellows 230 to give additional
bias.
Chamber 237 is defined within closure plug 221 between second shell
member 229 and mounting member 228. As fuel is supplied to a
vehicle fuel tank by nozzle assembly 210, fuel vapors coming from
the vehicle fuel tank filler pipe pass through passageways 227 and
234 to the interior of bellows 230. Should splash-back occur, th
liquid fuel is directed back into the fuel tank by plug member 226.
If the splash-back is great, some liquid fuel passes through
passageway 227 to chamber 237. Much of this fuel subsequently
returns along discharge spout 214 to the fuel tank filler pipe.
Nozzle 210 is connected to the discharge end of fuel delivery hose
244, the inlet end of which is connected to the outlet of a fuel
pump. Adjacent the connection of bellows 230 to housing 213, a
small orifice 246 provides communication from the interior of
bellows 230, through housing 213, to flexible tube 248, which is
enclosed within fuel delivery hose 244. Also, within fuel delivery
hose 244 is hose 172 having cable 72 within it. Hose 172, with
cable 72 therewithin, passes out a side of housing 213 and
terminates in connector portion 42. Thus, the conductors of cable
72 provide electrical connections to the pins of connector portion
42, while hose 172 supplies air under slight pressure to pressurize
the connector when connector portion 42 is mated with a connector
portion 40 so that fuel vapors can not get into the area adjacent
the connector pin connections, thereby assuring a non-hazardous
environment.
When vehicle servicing unit 18 is supplying a vehicle 34 with fuel
utilizing nozzle assembly 210, delivery spout 214 is inserted into
the fuel tank filler pipe of the vehicle 34, and connector portion
42 is mated to the connector portion 40 on the vehicle 34. Closing
of microswitch 66 causes air to be applied through hose 172 to the
connector interior. After the connector interior has been
adequately flushed with air, power is supplied to pin 62 of
connector portion 42, and the system is activated. When the fuel
delivery is to commence, control handle 222 is moved to a
fuel-delivery position, and, if desired, retainer 224 is moved to
retain control handle 222 in such position. As fuel is delivered
through nozzle assembly 210 to the vehicle fuel tank, air and fuel
vapors pass from the vehicle fuel tank. Plug member 226
substantially closes the fuel tank filler pipe inlet, preventing
passage of such gases into the surrounding atmosphere. Instead, the
air and fuel vapors from the fuel tank pass through fluid
passageways 227 and 234 into bellows 230. Flexible tube 248 is
coupled within servicing unit 18 to a fuel disposal. Thus,
passageways 227 and 234, bellows 230, orifice 246, and tube 248
define a fluid path to the fuel disposal from the area adjacent
discharge end 218 of delivery spout 214. A mild vacuum is drawn
through flexible tube 248 to draw the air and fuel vapors from
bellows 230 to the fuel disposal. Should splash-back occur, plug
member 226 likewise prevents escape of liquid fuel onto the ground.
If the splash-back is so great that plug member 226 is unable to
return all of the liquid fuel to the vehicle fuel tank, the excess
liquid fuel passes through passageways 227 and 234 to chamber 237
and the interior of bellows 230. After the fuel delivery is
completed and upon return of nozzle 210 to its retention position
on service panel 24, in which position orifice 246 is at the lower
end of bellows 230, any liquid fuel within bellows 230 drains
through orifice 246 and flexible tube 248 to the fuel disposal.
Preferably, an opening 257 is provided in bellows 230 to permit
entry of air to satisfy the vacuum requirements of the fuel
disposal, should there be insufficient air and vapor entering
through openings 227 and 234.
The fuel disposal can be any device capable of removing fuel vapors
from gas passing through it. By way of illustration, the fuel
disposal can include a solid adsorbent, for example charcoal, to
filter the fuel vapor from the gas, and a liquid fuel trap.
Alternatively, it could be a catalytic reactor to cause
substantially complete combustion of the fuel liquid and vapor with
air, giving exhaust products such as carbon dioxide and water, and
to let out the exhaust products. As a third alternative, the fuel
disposal could be a small internal combustion engine in which the
fuel liquid and vapor is combusted with an excess of oxygen,
permitting substantially complete combustion at a low combustion
temperature. The power from such an engine could be utilized to
provide the vacuum that draws the vapor and liquid fuel from
bellows 230. As an additional and preferred alternative, the fuel
disposal could be the engine of vehicle servicing unit 18, as
illustrated in FIG. 8.
FIG. 8 illustrates use of vehicle servicing system 18 of the
present invention with nozzle assembly 210, utilizing the engine of
servicing unit 18 as the fuel disposal to prevent escape of liquid
fuel and fuel vapor into the surrounding atmosphere. Nozzle 210 is
coupled by hose 244 to fuel source 250 within servicing unit 18.
Fuel source 250 includes fuel supply 252, pump 254 which pumps fuel
on command from fuel supply 252 through hose 244, and generator 256
which provides power for pump 254. Flexible tube 248, hose 172, and
cable 72 are within hose 244. Hose or pipe 258 couples flexible
tube 248 to engine 260 of vehicle servicing unit 18 to apply to the
engine the liquid fuel and fuel vapors which have been drawn within
bellows 230. During the time fuel is being dispensed, governor 262
receives a control signal from fuel source 250 to maintain the
speed of engine 260 constant at a level which drives generator 256
at the required speed to provide proper power for pump 254. In
addition, engine 260 powers compressor 170 which supplies air
through tube 171 to fuel source 250 and thus to hose 172. Governor
262 is mechanically coupled to gearshift control 264 to ensure that
the governor can not operate unless the transmission of vehicle
servicing unit 18 is in its neutral condition. Accordingly, while
fuel is being supplied to a vehicle, the fuel vapor leaving the
vehicle fuel tank filler pipe and any liquid fuel entering bellows
230 due to splash-back are drawn to engine 260 in which they are
combusted, rather than escaping into the atmosphere. Proper control
of engine 260 results in substantially complete combustion with
little or not contaminants.
Although the present invention has been described with reference to
preferred embodiments, numerous rearrangements and modifications
could be made, and still the result would be within the scope of
the invention.
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