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US20040140162A1 - Apparatus for setting fluid level in an automatic transmission - Google Patents

Apparatus for setting fluid level in an automatic transmission Download PDF

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Publication number
US20040140162A1
US20040140162A1 US10/348,888 US34888803A US2004140162A1 US 20040140162 A1 US20040140162 A1 US 20040140162A1 US 34888803 A US34888803 A US 34888803A US 2004140162 A1 US2004140162 A1 US 2004140162A1
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United States
Prior art keywords
fluid
regulator
standpipe
automatic transmission
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/348,888
Inventor
Dean Celini
Kenneth Potter
Syed Ilyas
John Bowlby
Marvin Schiemann
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Old Carco LLC
Original Assignee
DaimlerChrysler Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DaimlerChrysler Co LLC filed Critical DaimlerChrysler Co LLC
Priority to US10/348,888 priority Critical patent/US20040140162A1/en
Assigned to DAIMLERCHRYSLER CORPORATION reassignment DAIMLERCHRYSLER CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOWLBY II., JOHN C., CELINI, DEAN A., ILYAS, SYED, POTTER, KENNETH J., SCHIEMANN, MARVIN G.
Publication of US20040140162A1 publication Critical patent/US20040140162A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0447—Control of lubricant levels, e.g. lubricant level control dependent on temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M11/12—Indicating devices; Other safety devices concerning lubricant level

Definitions

  • This invention relates generally to transmissions for motor vehicles, and relates more particularly to a standpipe for setting the fluid level of an automatic transmission.
  • Motor vehicles generally require a power plant such as an internal combustion engine, a power train and wheels.
  • the internal combustion engine produces force by the conversion of the chemical energy in a liquid fuel into the mechanical energy of motion (kinetic energy), and the power train transmits this resultant force to the wheels to provide movement of the vehicle.
  • the main component of the power train is typically referred to as the transmission.
  • Engine torque and speed are converted in the transmission and delivered to the driven wheels in accordance with the vehicle's tractive-power availability.
  • the vehicle's transmission is also capable of controlling the direction of rotation being applied to the wheels, so that the vehicle may be driven both forward and backward.
  • U.S. Pat. No. 5,456,295 shows a transmission oil fill tube in which a sealed adapter is employed at the upper end to effect filling of a transmission sump with oil to a desired level.
  • An air pressure device is used to sense changes in the fluid level of the transmission fluid until a predetermined level is reached.
  • U.S. Pat. No. 5,860,459 teaches a top off fill wand assembly for adding and removing operating fluid from an automatic transmission. If the fluid level is low, the fill wand delivers fluid to a sump, and if the level is high, the wand removes fluid. In U.S. Pat. No.
  • the present invention is an apparatus for setting a level of fluid in an oil reservoir of an automatic transmission.
  • the apparatus comprises a standpipe attached to the oil reservoir, and a regulator movable relative to the standpipe.
  • Alternative means move the regulator relative to the standpipe to set a height of the regulator.
  • Another object of the present invention is to provide an apparatus of the type described above that regulates the fluid level in an automatic transmission as a function of the fluid temperature.
  • Another object of the present invention is to provide an apparatus of the type described above that accurately sets the fluid level in an automatic transmission as a function of the temperature of the fluid in the transmission or vehicle assembly plant without the need for high cost tooling.
  • the top off process is performed by removing the center plug from the standpipe and introducing additional fluid to the transmission via a fill hole in the case.
  • the regulator of the standpipe allows the fluid overage to flow into the center of the standpipe out of the transmission reservoir. Once the presence of fluid is detected the fill equipment terminates the addition of fluid.
  • the fluid level is thus precisely set for the given fluid temperature.
  • the center plug and fill hole plug are installed and the process is complete.
  • Another object of the present invention is to provide an apparatus of the type described above whereby the accurate setting of fluid level in an automatic transmission as a function of the temperature of the fluid is readily accomplished at either the service center or by the end user of the product using similar methods as the assembly plant.
  • FIG. 1 is a perspective view of a standpipe according to the present invention for an automatic transmission of a motor vehicle
  • FIG. 2 is a partial cross-sectional view of a valve of the standpipe in a cold fluid position
  • FIG. 3 is a partial cross-sectional view of the valve in a warm fluid position
  • FIG. 4 is a cross-sectional view of an alternative embodiment of the standpipe.
  • FIG. 1 shows one embodiment 10 of an apparatus according to the present invention for setting a level of fluid in an oil reservoir 12 of an automatic transmission of a motor vehicle.
  • the apparatus 10 comprises a standpipe 14 , a regulator 16 , and a lever 18 .
  • the standpipe 14 includes a drain plug 20 that drains any excess fluid to a drain pan.
  • the drain plug 20 is intact during normal operation.
  • the regulator 16 includes a generally vertical portion 22 and a horizontal portion 24 extending from the vertical portion.
  • the vertical portion 22 is slidably disposed in an opening 26 in one wall of the standpipe.
  • the horizontal portion 24 of the regulator is situated proximate the upper surface of the lever 18 , which is pivotably mounted within the standpipe 14 .
  • a coil spring 28 is anchored to the standpipe 14 , and includes a distal end 30 connected to the lever 18 .
  • the coil spring 28 is thermally sensitive, i.e. its length varies as a function of the transmission fluid in which it is immersed.
  • the coil spring When the transmission is cold, the coil spring is relatively short, and the lever 18 assumes a first, generally horizontal position as shown in FIG. 2.
  • the length of the coil spring 28 increases to rotate the lever generally counterclockwise.
  • the lever 18 biases the horizontal extension 24 of the regulator 16 upwardly to thereby raise the regulator in the opening 26 to a height shown in FIG. 3.
  • any fluid above the level of the top of the regulator 16 drains into the interior of the standpipe 10 and out through the drain plug 20 .
  • the level at which this drainage occurs is relatively low.
  • this level also increases, preferably in a linear fashion.
  • the height of the regulator 16 is calibrated to ensure that regardless of the temperature of the transmission, the fluid level can therefore be accurately set.
  • FIG. 4 shows an alternative embodiment 100 of the standpipe including a pipe 102 slidably disposed and suitably sealed in a thermal motor 104 .
  • a return spring 106 is situated between a reaction surface 108 of the thermal motor and a flange 110 proximate the bottom of the sliding pipe 102 .
  • the thermal motor 104 is filled with a fluid such as wax so that as the temperature of the transmission fluid increases, the volume of the fluid in the thermal motor expands, preferably at a linear rate.
  • the height of the pipe 102 thereby varies with the temperature of the transmission fluid, and any excess fluid drains through a drainpipe portion 112 of the thermal motor.
  • the standpipe 100 includes a drain plug similar to the drain plug shown in FIG. 1.
  • the fluid level of the automatic transmission can thus be set accurately and as a function of the temperature of the fluid in the transmission or vehicle assembly plant, without the need for high cost tooling.
  • the top off process is performed by removing the center plug from the standpipe and introducing additional fluid to the transmission via a fill hole in the case.
  • the regulator of the standpipe allows the excess fluid to flow into the center of the standpipe out of the transmission reservoir.
  • the fill equipment terminates the addition of fluid.
  • the fluid level is thus precisely set for the given fluid temperature.
  • the center plug and fill hole plug are installed and the process is complete. Additionally, setting the fluid level can be readily accomplished at either the service center or by the end user of the product using similar methods at the assembly plant.
  • the present invention thus allows the transmission oil level to be precisely set over a given operating temperature range, without the need for temperature measurement equipment or even a dipstick. While the embodiments of the invention disclosed herein are presently considered to be preferred, various changes and modifications can be made without departing from the spirit and scope of the invention. The scope of the invention is indicated in the appended claims, and all changes that come within the meaning and range of equivalents are intended to be embraced therein.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

An apparatus for setting a level of fluid in an oil reservoir of an automatic transmission comprises a standpipe attached to the oil reservoir, and a regulator movable relative to the standpipe. Alternative means move the regulator relative to the standpipe to set a height of the regulator.

Description

    TECHNICAL FIELD OF THE INVENTION
  • This invention relates generally to transmissions for motor vehicles, and relates more particularly to a standpipe for setting the fluid level of an automatic transmission. [0001]
    • BACKGROUND OF THE INVENTION
  • Motor vehicles generally require a power plant such as an internal combustion engine, a power train and wheels. The internal combustion engine produces force by the conversion of the chemical energy in a liquid fuel into the mechanical energy of motion (kinetic energy), and the power train transmits this resultant force to the wheels to provide movement of the vehicle. The main component of the power train is typically referred to as the transmission. Engine torque and speed are converted in the transmission and delivered to the driven wheels in accordance with the vehicle's tractive-power availability. The vehicle's transmission is also capable of controlling the direction of rotation being applied to the wheels, so that the vehicle may be driven both forward and backward. [0002]
  • Automatic transmission architecture and fluid characteristics most often result in an aggressive rise in fluid level with increasing temperature over the transmission operating range. As a result, it is often advantageous to the proper operation of an automatic transmission that the fluid level is set accurately as a function of temperature. [0003]
  • Fluid filling devices and methods have been proposed to fill transmissions with an operating fluid. U.S. Pat. No. 5,456,295 shows a transmission oil fill tube in which a sealed adapter is employed at the upper end to effect filling of a transmission sump with oil to a desired level. An air pressure device is used to sense changes in the fluid level of the transmission fluid until a predetermined level is reached. U.S. Pat. No. 5,860,459 teaches a top off fill wand assembly for adding and removing operating fluid from an automatic transmission. If the fluid level is low, the fill wand delivers fluid to a sump, and if the level is high, the wand removes fluid. In U.S. Pat. No. 4,877,066, an optical sensor and associated amplifier are employed to sense the distance of the surface of the fluid from the end of a fluid dispensing device and to signal a controller to operate a fluid dispenser to effect the supply of fluid until a predetermined fluid level is obtained. Each of these patents is hereby incorporated by reference. [0004]
    • SUMMARY OF THE INVENTION
  • The present invention is an apparatus for setting a level of fluid in an oil reservoir of an automatic transmission. The apparatus comprises a standpipe attached to the oil reservoir, and a regulator movable relative to the standpipe. Alternative means move the regulator relative to the standpipe to set a height of the regulator. [0005]
  • Accordingly, it is an object of the present invention to provide an apparatus of the type described above that sets the fluid level in an automatic transmission of a motor vehicle. [0006]
  • Another object of the present invention is to provide an apparatus of the type described above that regulates the fluid level in an automatic transmission as a function of the fluid temperature. [0007]
  • Another object of the present invention is to provide an apparatus of the type described above that accurately sets the fluid level in an automatic transmission as a function of the temperature of the fluid in the transmission or vehicle assembly plant without the need for high cost tooling. In this environment, the top off process is performed by removing the center plug from the standpipe and introducing additional fluid to the transmission via a fill hole in the case. The regulator of the standpipe allows the fluid overage to flow into the center of the standpipe out of the transmission reservoir. Once the presence of fluid is detected the fill equipment terminates the addition of fluid. The fluid level is thus precisely set for the given fluid temperature. The center plug and fill hole plug are installed and the process is complete. [0008]
  • Another object of the present invention is to provide an apparatus of the type described above whereby the accurate setting of fluid level in an automatic transmission as a function of the temperature of the fluid is readily accomplished at either the service center or by the end user of the product using similar methods as the assembly plant. [0009]
  • These and other features and advantages of the invention will become further apparent from the following detailed description of the presently preferred embodiments, read in conjunction with the accompanying drawings. The detailed description and drawings are merely illustrative of the invention rather than limiting, the scope of the invention being defined by the appended claims and equivalents thereof.[0010]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of a standpipe according to the present invention for an automatic transmission of a motor vehicle; [0011]
  • FIG. 2 is a partial cross-sectional view of a valve of the standpipe in a cold fluid position; [0012]
  • FIG. 3 is a partial cross-sectional view of the valve in a warm fluid position; and [0013]
  • FIG. 4 is a cross-sectional view of an alternative embodiment of the standpipe.[0014]
    • DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS
  • FIG. 1 shows one [0015] embodiment 10 of an apparatus according to the present invention for setting a level of fluid in an oil reservoir 12 of an automatic transmission of a motor vehicle. The apparatus 10 comprises a standpipe 14, a regulator 16, and a lever 18. The standpipe 14 includes a drain plug 20 that drains any excess fluid to a drain pan. The drain plug 20 is intact during normal operation.
  • The [0016] regulator 16 includes a generally vertical portion 22 and a horizontal portion 24 extending from the vertical portion. The vertical portion 22 is slidably disposed in an opening 26 in one wall of the standpipe. The horizontal portion 24 of the regulator is situated proximate the upper surface of the lever 18, which is pivotably mounted within the standpipe 14. A coil spring 28 is anchored to the standpipe 14, and includes a distal end 30 connected to the lever 18.
  • The [0017] coil spring 28 is thermally sensitive, i.e. its length varies as a function of the transmission fluid in which it is immersed. When the transmission is cold, the coil spring is relatively short, and the lever 18 assumes a first, generally horizontal position as shown in FIG. 2. As the temperature of the automatic transmission fluid rises, the length of the coil spring 28 increases to rotate the lever generally counterclockwise. During this process, the lever 18 biases the horizontal extension 24 of the regulator 16 upwardly to thereby raise the regulator in the opening 26 to a height shown in FIG. 3.
  • Any fluid above the level of the top of the [0018] regulator 16 drains into the interior of the standpipe 10 and out through the drain plug 20. When the transmission fluid is cold, the level at which this drainage occurs is relatively low. As the temperature of the fluid increases, this level also increases, preferably in a linear fashion. The height of the regulator 16 is calibrated to ensure that regardless of the temperature of the transmission, the fluid level can therefore be accurately set.
  • FIG. 4 shows an [0019] alternative embodiment 100 of the standpipe including a pipe 102 slidably disposed and suitably sealed in a thermal motor 104. A return spring 106 is situated between a reaction surface 108 of the thermal motor and a flange 110 proximate the bottom of the sliding pipe 102. The thermal motor 104 is filled with a fluid such as wax so that as the temperature of the transmission fluid increases, the volume of the fluid in the thermal motor expands, preferably at a linear rate. In the fashion described above with respect to the first embodiment of the invention, the height of the pipe 102 thereby varies with the temperature of the transmission fluid, and any excess fluid drains through a drainpipe portion 112 of the thermal motor. In operation the standpipe 100 includes a drain plug similar to the drain plug shown in FIG. 1.
  • The fluid level of the automatic transmission can thus be set accurately and as a function of the temperature of the fluid in the transmission or vehicle assembly plant, without the need for high cost tooling. In this environment, the top off process is performed by removing the center plug from the standpipe and introducing additional fluid to the transmission via a fill hole in the case. The regulator of the standpipe allows the excess fluid to flow into the center of the standpipe out of the transmission reservoir. Once the presence of fluid is detected, the fill equipment terminates the addition of fluid. The fluid level is thus precisely set for the given fluid temperature. The center plug and fill hole plug are installed and the process is complete. Additionally, setting the fluid level can be readily accomplished at either the service center or by the end user of the product using similar methods at the assembly plant. [0020]
  • The present invention thus allows the transmission oil level to be precisely set over a given operating temperature range, without the need for temperature measurement equipment or even a dipstick. While the embodiments of the invention disclosed herein are presently considered to be preferred, various changes and modifications can be made without departing from the spirit and scope of the invention. The scope of the invention is indicated in the appended claims, and all changes that come within the meaning and range of equivalents are intended to be embraced therein. [0021]

Claims (14)

1. An apparatus for setting a level of fluid in an oil reservoir of an automatic transmission, the apparatus comprising:
a standpipe attached to the oil reservoir;
a regulator movable relative to the standpipe; and
means for moving the regulator relative to the standpipe to set a height of the regulator.
2. The apparatus of claim 1 wherein the means for moving the regulator comprises a coil spring.
3. The apparatus of claim 1 wherein the means for moving the regulator comprises a lever.
4. The apparatus of claim 1 wherein the means for moving the regulator comprises a thermal motor.
5. The apparatus of claim 1 wherein the means for moving the regulator is thermally sensitive.
6. The apparatus of claim 1 wherein the height of the regulator is a function of temperature of the fluid.
7. An apparatus for regulating a level of fluid in an oil reservoir of an automatic transmission, the apparatus comprising:
a standpipe attached to the oil reservoir;
a regulator movable relative to the standpipe;
a lever mounted to the standpipe; and
a coil spring engaged with the lever.
8. The apparatus of claim 7 wherein the coil spring is thermally sensitive.
9. The apparatus of claim 8 wherein a height of the regulator is a function of temperature of the fluid.
10. The apparatus of claim 7 wherein the regulator is mounted as gate in the standpipe.
11. The apparatus of claim 7 wherein the regulator is mounted as a sliding gate in the standpipe.
12. An apparatus for regulating a level of fluid in an oil reservoir of an automatic transmission, the apparatus comprising:
a standpipe attached to the oil reservoir;
a regulator; and
a thermal motor for moving the regulator relative to the regulator.
13. The apparatus of claim 12 wherein the thermal motor is thermally sensitive.
14. The apparatus of claim 12 wherein the thermal motor moves the regulator to a height as a function of temperature of the fluid.
US10/348,888 2003-01-22 2003-01-22 Apparatus for setting fluid level in an automatic transmission Abandoned US20040140162A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040226774A1 (en) * 2003-05-14 2004-11-18 Gunderson Joel H. Thermally compensated standpipe assembly for automatic transmission oil fill

Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903091A (en) * 1955-12-30 1959-09-08 Edward E Goehring Automatic oil reservoir
US3591079A (en) * 1969-11-26 1971-07-06 Gen Motors Corp Heating system and heat generating pump
US3618625A (en) * 1969-10-29 1971-11-09 William R Walters Ice axe valve
US3662858A (en) * 1970-08-27 1972-05-16 Gen Motors Corp Self-purging lubricant reservoir
US3754706A (en) * 1971-11-15 1973-08-28 Rockwell International Corp Temperature responsive bypass valve
US3777852A (en) * 1972-02-25 1973-12-11 Tenneco Inc Automatic oil level regulator
US3930423A (en) * 1974-11-29 1976-01-06 General Motors Corporation Constant oil level control for transmission sump
US4089915A (en) * 1976-11-15 1978-05-16 Jackson Richard R Self-sterilizing humidifier
US4529061A (en) * 1984-01-23 1985-07-16 Deere & Company Fluid level control system
US4877066A (en) * 1988-08-31 1989-10-31 Mazda Motor Manufacturing (Usa) Corporation Apparatus for filling transmission fluid into transmissions
US5035512A (en) * 1989-07-18 1991-07-30 Aisin Seiki Kabushiki Kaisha Oil-level sensing apparatus having a time delay function
US5254976A (en) * 1992-03-09 1993-10-19 Textron Inc. Liquid leak detector apparatus and method
US5319973A (en) * 1993-02-02 1994-06-14 Caterpillar Inc. Ultrasonic fuel level sensing device
US5351913A (en) * 1992-06-22 1994-10-04 United Technologies Corporation Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors
US5456295A (en) * 1994-07-11 1995-10-10 Chrysler Corporation Vehicle transmission oil filling apparatus and method
US5509949A (en) * 1994-09-19 1996-04-23 Eaton Corporation Apparatus for venting a transmission
US5749439A (en) * 1997-03-21 1998-05-12 General Motors Corporation Hydraulic fluid storage for a powertrain
US5808187A (en) * 1997-03-31 1998-09-15 Ford Global Technologies, Inc. Fluid level indicator
US5860459A (en) * 1997-03-25 1999-01-19 Chrysler Corporation Apparatus and method of filling an automatic transmission with working fluid
US5887613A (en) * 1994-10-11 1999-03-30 Steinhardt; Lothar Device for the regulation of a constant outflow from a liquid container
US5984195A (en) * 1996-06-17 1999-11-16 Whirl Massage Showerhead, Inc. Temperature responsive fluid flow controllers
US6003778A (en) * 1998-08-17 1999-12-21 Texas Instruments Incorporated Automotive oil level control apparatus
US6012550A (en) * 1997-12-17 2000-01-11 Hyundai Motor Company Bypass device for automatic transmission fluid provided with a thermal expansion bar
US6015444A (en) * 1998-02-27 2000-01-18 Eaton Corporation Apparatus and system for venting a transmission
US6371158B1 (en) * 2000-10-03 2002-04-16 Deere & Company Hydraulic system sump standpipe
US20030221746A1 (en) * 2002-06-03 2003-12-04 Michael Jacob Filling device for oil level regulation on oil pans in engines and transmissions

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903091A (en) * 1955-12-30 1959-09-08 Edward E Goehring Automatic oil reservoir
US3618625A (en) * 1969-10-29 1971-11-09 William R Walters Ice axe valve
US3591079A (en) * 1969-11-26 1971-07-06 Gen Motors Corp Heating system and heat generating pump
US3662858A (en) * 1970-08-27 1972-05-16 Gen Motors Corp Self-purging lubricant reservoir
US3754706A (en) * 1971-11-15 1973-08-28 Rockwell International Corp Temperature responsive bypass valve
US3777852A (en) * 1972-02-25 1973-12-11 Tenneco Inc Automatic oil level regulator
US3930423A (en) * 1974-11-29 1976-01-06 General Motors Corporation Constant oil level control for transmission sump
US4089915A (en) * 1976-11-15 1978-05-16 Jackson Richard R Self-sterilizing humidifier
US4529061A (en) * 1984-01-23 1985-07-16 Deere & Company Fluid level control system
US4877066A (en) * 1988-08-31 1989-10-31 Mazda Motor Manufacturing (Usa) Corporation Apparatus for filling transmission fluid into transmissions
US5035512A (en) * 1989-07-18 1991-07-30 Aisin Seiki Kabushiki Kaisha Oil-level sensing apparatus having a time delay function
US5254976A (en) * 1992-03-09 1993-10-19 Textron Inc. Liquid leak detector apparatus and method
US5351913A (en) * 1992-06-22 1994-10-04 United Technologies Corporation Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors
US5319973A (en) * 1993-02-02 1994-06-14 Caterpillar Inc. Ultrasonic fuel level sensing device
US5456295A (en) * 1994-07-11 1995-10-10 Chrysler Corporation Vehicle transmission oil filling apparatus and method
US5509949A (en) * 1994-09-19 1996-04-23 Eaton Corporation Apparatus for venting a transmission
US5887613A (en) * 1994-10-11 1999-03-30 Steinhardt; Lothar Device for the regulation of a constant outflow from a liquid container
US5984195A (en) * 1996-06-17 1999-11-16 Whirl Massage Showerhead, Inc. Temperature responsive fluid flow controllers
US5749439A (en) * 1997-03-21 1998-05-12 General Motors Corporation Hydraulic fluid storage for a powertrain
US5860459A (en) * 1997-03-25 1999-01-19 Chrysler Corporation Apparatus and method of filling an automatic transmission with working fluid
US5808187A (en) * 1997-03-31 1998-09-15 Ford Global Technologies, Inc. Fluid level indicator
US6012550A (en) * 1997-12-17 2000-01-11 Hyundai Motor Company Bypass device for automatic transmission fluid provided with a thermal expansion bar
US6015444A (en) * 1998-02-27 2000-01-18 Eaton Corporation Apparatus and system for venting a transmission
US6003778A (en) * 1998-08-17 1999-12-21 Texas Instruments Incorporated Automotive oil level control apparatus
US6371158B1 (en) * 2000-10-03 2002-04-16 Deere & Company Hydraulic system sump standpipe
US20030221746A1 (en) * 2002-06-03 2003-12-04 Michael Jacob Filling device for oil level regulation on oil pans in engines and transmissions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040226774A1 (en) * 2003-05-14 2004-11-18 Gunderson Joel H. Thermally compensated standpipe assembly for automatic transmission oil fill
US7325653B2 (en) * 2003-05-14 2008-02-05 General Motors Corporation Thermally compensated standpipe assembly for automatic transmission oil fill

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AS Assignment

Owner name: DAIMLERCHRYSLER CORPORATION, MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CELINI, DEAN A.;SCHIEMANN, MARVIN G.;BOWLBY II., JOHN C.;AND OTHERS;REEL/FRAME:013574/0890

Effective date: 20021212

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION