Legs Patents (Class 165/68)
  • Patent number: 11365942
    Abstract: An embodiment of a heat exchanger assembly includes a first manifold adapted for receiving a first medium, a core adapted for receiving and placing a plurality of mediums, including the first medium, in at least one heat exchange relationship, and a core meeting the first manifold at a first core/manifold interface; The mounting structure supports a heat exchanger, and is metallurgically joined to at least one heat exchanger assembly component at a first joint integrally formed with the mounting structure.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: June 21, 2022
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Ryan Matthew Kelley, Gabriel Ruiz, James Streeter, Michael Zager
  • Patent number: 11039550
    Abstract: A planar fin for use in a heat sink includes turbulent structures extending from the sides of the planar fin. Each turbulent structure defines a longitudinal axis and having a first edge that is parallel to the longitudinal axis and connected to the a planar surface of the fin. Each turbulent structure also includes a second edge opposite the first edged and in free space. The second edge defines a periphery that varies in distance from the first edge along the length of the longitudinal axis. The periphery of each second edge is further shaped such that turbulent flow of a fluid is induced in the flow flowing over the second edge at at least a predefined flow rate.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: June 15, 2021
    Assignee: Google LLC
    Inventor: Xu Zuo
  • Patent number: 9219022
    Abstract: Heat transfer devices and methods for making the same that include a first enclosure having at least one inlet port; a second enclosure having a bottom plate and one or more dividing walls to establish channels, at least one internal surface of each channel having rib structures to create turbulence in a fluid flow; and a jet plate connecting the first enclosure and the second enclosure having impinging jets that convey fluid from the first enclosure to the channels, said impinging jets being set at an angular deviation from normal to cause local acceleration of fluid and to increase a local heat transfer rate.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: December 22, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Pritish R. Parida
  • Publication number: 20150000867
    Abstract: The present invention provides a compression apparatus capable of improving assembling workability, and the compression apparatus includes: a compressor that compresses a gas; a cooler that cools a gas discharged from the compressor in a compressed state; and a support base that supports the compressor and the cooler, wherein the support base includes a main support base having the compressor disposed thereon and an auxiliary support table connectable to the main support base, and wherein the auxiliary support table includes a base plate supporting the cooler and a plurality of leg portions supporting the base plate and stands by itself by the plurality of leg portions.
    Type: Application
    Filed: May 23, 2014
    Publication date: January 1, 2015
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Sho OBA, Emi OGAWA, Ryusuke IGAKI
  • Publication number: 20130248146
    Abstract: A heat sink module has a leg for tool-less engagement with a mounting structure on a circuit board. Engagement of the heat sink module with the mounting structure is to cause thermal contact between the heat sink module and a heat generating device.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 26, 2013
    Inventor: ANDREW L. WILTZIUS
  • Patent number: 8430152
    Abstract: An exemplary heat dissipation device includes a round heat sink and a fixing frame. The heat sink defines receiving depressions at an outer peripheral surface thereof. The fixing frame includes a peripheral side plate disposed around the heat sink and fixing legs corresponding to the receiving depressions of the heat sink extending downwardly from the side plate. The fixing frame includes blocks extending inwardly from an inner surface of the side plate and protruding members extending inwardly from the fixing legs. The heat sink is rotatably received in the fixing frame with a top of the heat sink abutting the blocks. When the heat sink is in an unlocked state, the protruding members align with the receiving depressions, respectively. When the heat sink is rotated to a locked state, the protruding members abut a bottom of the heat sink.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: April 30, 2013
    Assignees: Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.
    Inventors: Heng Liu, Jing Zhang
  • Publication number: 20130092352
    Abstract: A cooler, structure for transporting a cooler and a method for transporting the same are disclosed. The cooler has a cooling region defined by a support wall, a first wall, a second wall, and a sloped interior section, the sloped interior section extending between the first wall and the second wall and sloping away from the support wall. A discharge region is provided and is defined by the first wall, the second wall, the sloped interior section, and a vertical wall, the vertical wall being substantially parallel to the support wall. A frame member is positioned proximate the support wall. The frame member has support legs which extend therefrom in a direction way from the vertical wall. The frame member and support legs support the cooler when the cooler is rotated and positioned on a surface.
    Type: Application
    Filed: October 14, 2011
    Publication date: April 18, 2013
    Applicant: HARSCO CORPORATION
    Inventors: Indian MARTIN, John MILLER, Bradley WHITE, Shannon FAUST, Alan GURKA, Chris BYFIELD
  • Patent number: 7993032
    Abstract: Disclosed is a modular light emitting diode (LED) light pod having heat dissipation structures. A reflective optic plate, which may be made in various modular sizes and designs, having a plurality of recesses is seated on an LED board having a plurality of LEDs, such that the plurality of LEDs fit within the plurality optical recesses. The optical recesses serve to collimate light in a desirable manner based on predetermined dimensional ratios of the optical recesses. A heat dissipation system involves a heat sink housing acting in combination with a heat extraction plate having a plurality thermally conductive posts extending perpendicularly from a top and bottom surface, and a heat dissipation plate to create a thermally conductive path for moving heat away from the LED board when the light pod is in use.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: August 9, 2011
    Assignee: Light-Pod, Inc.
    Inventor: Lothar E. S. Budike
  • Patent number: 7963492
    Abstract: A vertical support structure includes a mounting plate and a support member. The support member has a vertically-elongated central panel and a pair of vertically-elongated side panels connected to and extending perpendicularly from the central panel to form a U-shaped-channel as viewed in cross-section. The support member has a top edge and a bottom edge disposed vertically apart from and extending horizontally parallel to one another. The support member has a slot formed at least through the central panel. The slot is disposed between and extends parallel to the top and bottom edges. The mounting plate is slidably inserted into the slot in a close-fitting manner and is connected to the support member such that the mounting plate at least partially projects perpendicularly from the central panel away from the U-shaped channel. A guide element is connected to the top edge and extends upwardly and inwardly toward the U-shaped channel.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: June 21, 2011
    Assignee: EVAPCO, Inc.
    Inventor: Scott A. Nevins
  • Publication number: 20110132573
    Abstract: An exemplary heat dissipation device includes a heat sink and a fixing frame. The heat sink defines receiving depressions at an outer peripheral surface thereof. The fixing frame includes a peripheral side plate encircling the heat sink, fixing legs extending downwards from the side plate, and an elastic member disposed on the side plate. Protruding members extend inwardly from the fixing legs. The heat sink is rotatably received in the fixing frame. When the heat sink is in an unlocked state, the protruding members align with the receiving depressions, respectively. When the heat sink is rotated to a locked state, the protruding members abut a bottom of the heat sink thereby limiting axial movement of the heat sink relative to the fixing frame and the elastic member is received in a corresponding receiving depression and limit rotation of the heat sink in both clockwise and counterclockwise directions.
    Type: Application
    Filed: May 3, 2010
    Publication date: June 9, 2011
    Applicants: Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.
    Inventors: HENG LIU, JING ZHANG
  • Publication number: 20110108236
    Abstract: An exemplary heat dissipation device includes a round heat sink and a fixing frame. The heat sink defines receiving depressions at an outer peripheral surface thereof. The fixing frame includes a peripheral side plate disposed around the heat sink and fixing legs corresponding to the receiving depressions of the heat sink extending downwardly from the side plate. The fixing frame includes blocks extending inwardly from an inner surface of the side plate and protruding members extending inwardly from the fixing legs. The heat sink is rotatably received in the fixing frame with a top of the heat sink abutting the blocks. When the heat sink is in an unlocked state, the protruding members align with the receiving depressions, respectively. When the heat sink is rotated to a locked state, the protruding members abut a bottom of the heat sink.
    Type: Application
    Filed: April 15, 2010
    Publication date: May 12, 2011
    Applicants: FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD., FOXCONN TECHNOLOGY CO., LTD.
    Inventors: HENG LIU, JING ZHANG
  • Patent number: 7938373
    Abstract: A vertical support structure includes a mounting plate and a support member. The support member extends vertically along a vertical axis and has a pair of vertically-elongated panel integrally connected together in a form of an angle iron to define a vertically-extending L-shaped channel between outside edges of the pair of panels. A top edge of the support member and a bottom edge of the support member are disposed vertically apart from and extend horizontally parallel to one another. The support member has a slot formed therethrough. The slot is disposed between the top and bottom edges and extends horizontally between the outside edges. The slot is sized to slidably receive the mounting plate and the mounting plate occupying the slot is connected to the support member such that the mounting plate projects perpendicularly from the support member and away from the L-shaped channel.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: May 10, 2011
    Assignee: Evapco, Inc.
    Inventor: Scott A. Nevins
  • Publication number: 20110094709
    Abstract: An exemplary heat dissipation apparatus includes frame, a cooling fan and a heat sink. The frame includes an annular wall, a supporting board extending inward from a top of the annular wall, a plurality of legs extending downwardly from a bottom of the annular wall, and a plurality of engaging portions extending inward from an inner circumferential surface of the annular wall. A bottom of each engaging portion forms a plurality of steps at different levels. The levels of the steps of each engaging portion correspond to the levels of the steps of each other engaging portion. The cooling fan is arranged on the supporting board of the frame. The heat sink abuts against one of the steps of each engaging portion.
    Type: Application
    Filed: March 25, 2010
    Publication date: April 28, 2011
    Applicants: FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD., FOXCONN TECHNOLOGY CO., LTD.
    Inventors: JIAN YANG, JING ZHANG
  • Patent number: 7900689
    Abstract: An core unit for a heat exchanger being bent about an axis perpendicular to the core unit's headers. Tubes establish fluid communication between the core unit's headers, and a bend relief spacer is disposed between first and second groups of tubes. During the bending process, the bend relief spacer facilitates the bend and ultimately maintains the performance of the core unit.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: March 8, 2011
    Assignee: Delphi Technologies, Inc.
    Inventors: David E. Samuelson, Donald Robert Pautler
  • Patent number: 7718033
    Abstract: A one step method and system for producing nanofluids by a particle-source evaporation and deposition of the evaporant into a base fluid. The base fluid such (i.e. ethylene glycol) is placed in a rotating cylindrical drum having an adjustable heater-boat-evaporator and heat exchanger-cooler apparatus. As the drum rotates, a thin liquid layer is formed on the inside surface of the drum. A heater-boat-evaporator having an evaporant material (particle-source) placed within its boat evaporator is adjustably positioned near a portion of the rotating thin liquid layer, the evaporant material being heated thereby evaporating a portion of the evaporant material, the evaporated material absorbed by the liquid film to form nanofluid.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: May 18, 2010
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Milivoje Kostic, Mihajlo Golubovic, John R. Hull, Stephen U. S. Choi
  • Patent number: 7367380
    Abstract: Disclosed herein is a turn-fin condenser. The turn-fin condenser employs a turn-fin tube adhesively wound in a spiral shape around an outer surface of the tube in which refrigerant flows. The condenser comprises a coil type turn-fin tube 10 wound in a coil shape and fixed by inner and outer brackets 20 and 30 surrounding an outer peripheral surface of the coil type turn-fin tube, a motor 40 positioned in an inner space formed by the coil type turn-fin tube 10, a blowing fan 50 for taking ambient air in the coil type turn-fin tube 10 after being driven by the motor 40, and a tube wall 80 spirally wound with tube 11 extending out of the inner and outer brackets 20 and 30 at the rear side of the coil type turn-fin tube 10. The turn-fin condenser is easily manufactured and allows a greater quantity of air contact with turn-fins, thereby enhancing heat exchange efficiency.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: May 6, 2008
    Assignee: Korea Bundy Corp.
    Inventors: Dong Ha Lee, Mun Jae Im
  • Patent number: 6827129
    Abstract: A front-end module, including a heat exchanger including a radiator and a condenser integrated with each other, brackets, etc. and having a dual function as a strength member for the vehicle body, is mounted on an automotive vehicle. As a result, the front end panel is eliminated, and a simple structure is provided in which the parts which can be assembled on the front end of the vehicle, including the radiator, the condenser, headlights, a hood lock, a horn and sensors, can be assembled on the vehicle.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: December 7, 2004
    Assignee: Denso Corporation
    Inventors: Ikuo Ozawa, Toshiki Sugiyama, Norihisa Sasano, Masakazu Watanabe, Hisashi Kayano
  • Publication number: 20040159420
    Abstract: A HVAC system of a motor vehicle includes a film having openings defined therein and moveable between open and closed positions. The film regulates airflow by opening and closing apertures defined in a housing of the HVAC system. The film is disposed in a film valve assembly containing first and second rollers that wind and unwind the film. The film includes a substrate that includes a fiber selected from the group of polyester-based fibers, glass-based fibers, and combinations thereof. An elastomeric layer is disposed on the substrate layer. The substrate also includes a silicone layer disposed on the elastomeric layer for minimizing noise created as the film moves between the open and closed positions.
    Type: Application
    Filed: February 17, 2004
    Publication date: August 19, 2004
    Inventors: Gerald M. Goupil, Christopher M. Comeaux, Frank M. Keese
  • Patent number: 6370796
    Abstract: A cooling system and method are provided for cooling a heater block located in a cylindrical processing chamber of a wafer processing apparatus. The cooling system includes first and second frame assemblies having respective ends adapted to rest on an upper peripheral surface of the processing chamber, and fan assemblies mounted to the frame assemblies at spaced locations therealong. A first pair of fan assemblies are directed to push air into the processing chamber, and a second pair of fan assemblies are directed to pull air out of the processing chamber. The fan assemblies are arranged such that they circulate ambient air through the processing chamber to provide a rapid cooling of the heater block to a safe working temperature. The frame assemblies have an adjustable length that can be adjusted to fit processing chambers having different sizes and configurations.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: April 16, 2002
    Assignees: sony corporation, Sony Electronics, Inc.
    Inventor: Daniel Zucker
  • Patent number: 6199622
    Abstract: A connecting structure for connecting a radiator having a reinforcement member and a condenser having a bracket is provided. The structure includes a connecting member having a spacer portion and a holding portion integrally formed on opposite sides of a notch. The spacer portion is fittingly inserted into the reinforcement member, and a folded portion of the reinforcement member and the condenser bracket are inserted into the notch. A bolt is inserted through the reinforcement member, the spacer portion, the bracket and the holding portion and a nut is screwed onto a tip of the bolt for clamping the radiator and the condenser together.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: March 13, 2001
    Assignee: Calsonic Kansei Corporation
    Inventors: Katsuji Mashio, Fumihiro Inoue, Yukinobu Take, Hiroshi Koizumi, Katsumi Nakamura, Hironori Muramoto
  • Patent number: 6030461
    Abstract: A portable cooling system for use with a semiconductor fabrication system having a heating block is provided. A portable cooling system, consistent with one embodiment of the invention, includes a support structure removably mountable on part of the semiconductor fabrication system and near the heating block of the fabrication system. Disposed on the support structure are one or more fans for blowing air over the heating block. In one embodiment, the support structure includes a plate and a plurality of legs which extend down from the plate for mounting on the heating block. In another embodiment, the support structure includes a plate and means for mounting the plate on one or more walls of the semiconductor fabrication system. The portable cooling system facilitates the cooling of the heating block of the fabrication system and can, for example, significantly reduce the time spent cleaning the semiconductor fabrication system as compared to conventional cleaning techniques.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: February 29, 2000
    Assignee: Advanced Micro Devices, Inc.
    Inventor: David Michael Cantrell
  • Patent number: 4691764
    Abstract: A heat exchanger unit comprises a support on which is positioned a plurality of stays mounted at spaced locations. A horizontally extending bracket is secured to each of the stays and a plurality of connected heat exchanger plates are suspended from their upper ends from the brackets. The plates have heat media carrying channels which are joined together. The support advantageously comprises a steel ring to which the brackets are attached and which extend radially inwardly also radially outwardly. The heat exchanger plates are rectangularly shaped and are suspended from each bracket so that it hangs freely downwardly. Wire guards extend between the plates to prevent them from deflecting and contacting each other. The construction permits the elimination of spaced support elements which interfere with free heat exchange flow between the plates.
    Type: Grant
    Filed: March 13, 1986
    Date of Patent: September 8, 1987
    Assignee: Norbert Allenspach
    Inventor: Felix Durst
  • Patent number: 4489775
    Abstract: Desublimator for isolating sublimation products from reaction gases, which consists of a closed housing and a plurality of rows of finned tubes accommodated horizontally and superposedly therein, successive superposed finned tubes being supported, and mutually spaced, with limited adjustability, by means of cage-like perforated sliding shoes surrounding them in a box-like manner, the sliding shoes of the individual finned tubes being directly stacked one above the other and resting loosely on common supporting girders anchored to the housing, and the supporting girders having, in cross-section, the outline of a triangle with its apex pointing downward.
    Type: Grant
    Filed: July 28, 1981
    Date of Patent: December 25, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Harry Kassat, Friedrich Wirth, Joachim Wagner
  • Patent number: 4380996
    Abstract: A roof construction for buildings comprising a framework of bars and junctions, the bars being arranged in sets which are located in several mutually intersecting planes that are group-wise substantially parallel. One group of a set of bars extends in substantially parallel planes of the framework and is aligned independently of building orientation in the direction of the highest elevation of the sun. Solar collectors are mounted on these sets of bars.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: April 26, 1983
    Assignee: MERO-Raumstruktur GmbH & Co.
    Inventor: Max Mengeringhausen
  • Patent number: 4378006
    Abstract: A transportable solar panel foundation device which has a bottom member, at least one upstanding side member, and an essentially open top. The side members are angled to permit nesting of a plurality of the foundation devices, and reinforcement pads are carried by the foundation device to support legs for one or more solar panels.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: March 29, 1983
    Assignee: Atlantic Richfield Company
    Inventor: Wilbur W. Hawley
  • Patent number: 4331106
    Abstract: A heat exchanger is mounted in the upper portion of a fluidized combusting bed for the control of the temperature of the bed. A support, made up of tubes, is extended from the perforated plate of the fluidized bed up to the heat exchanger. The tubular support framework for the heat exchanger has liquid circulated therethrough to prevent deterioration of the support.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: May 25, 1982
    Assignee: Combustion Engineering, Inc.
    Inventor: Carl W. Lawton
  • Patent number: 4312326
    Abstract: A system for concentrating electro-magnetic radiation, such as solar radiation, by means of a plurality of reflectors mounted on a common frame and aimed at a radiation absorber that is rigidly coupled to the frame by an intermediate support. The combined frame, reflectors, absorber and intermediate support are coupled to a cantilever beam by means of a suspension assembly located between the absorber and the reflectors. This suspension is at the center of gravity of the combined frame, reflectors, absorber and intermediate support. The cantilever beam is coupled at one end to a main support and at the other to the suspension assembly. This suspension assembly allows the combined frame, reflectors, absorber and intermediate support to pivot relative to the beam about two perpendicular axes.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: January 26, 1982
    Assignee: LaJet Energy Company
    Inventor: Alfred L. Johnson, Jr.
  • Patent number: 4308913
    Abstract: Lattice-type supporting structures with girders on which heat exchanger elements of rectangular or square cross section are supported. Typically air/tube dry cooling elements for cooling towers are disclosed. The heat exchanger elements are supported by stilts on the girders at a distance thereabove, with the stilts extending perpendicular to the supporting surface of girders. The stilts are mounted on girders in a manner making them immovable in a direction perpendicular to their longitudinal axis. The stilts have a high flexibility in bending permitting free expansion or contraction of each heat exchanger element or each heat exchanger element group with a plurality of elements combined into an integral unit under conditions of changing temperatures.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: January 5, 1982
    Assignee: Maschinenfabrik Augsburg-Nu.rnberg Aktiengesellschaft
    Inventors: Hermann Heeren, Dietrich Richter
  • Patent number: 4262741
    Abstract: A means for supporting a heat exchanger formed of spaced apart headers with finned tubes extending therebetween, the headers being supported between parallel opposed structural members, the support means including brackets having horizontal portions on which each of the headers rests and clip affixed to the headers adjacent each bracket, each clip having a horizontal portion extending below and parallel the brackets, and stops adjacent the clips to limit the horizontal movement of the headers.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: April 21, 1981
    Inventor: Robert K. Rothenbucher
  • Patent number: 4231421
    Abstract: Apparatus for use in a heat exchanger assembly having wound fin tubing including a spacer member having a structural portion for securing components within the heat exchanger and a series of spaced projections extending therefrom. The spaced projections define a series of U-shaped openings adapted to receive and maintain the wound fin tubing in a fixed relationship. A retainer element is mounted to enclose the openings to secure the wound fin tubing therein. On some of the projections of the spacer member are mounted tabs which are inserted through slots in the retainer element to secure the retainer element to the spacer member such that the wound fin tubing is secured within the spaced openings and such that the structural portion of the spacer member secures various components of the heat exchanger assembly.
    Type: Grant
    Filed: December 1, 1978
    Date of Patent: November 4, 1980
    Assignee: Carrier Corporation
    Inventors: Burrows P. Eaton, William Wright
  • Patent number: 4196775
    Abstract: A shock-mounted, liquid cooled cold plate assembly for dissipating heat f electronic packages mounted on it. A U-shaped cold plate is cast about a tube to provide a passageway for carrying a turbulent flow of coolant along its length. The cold plate is mounted on a vehicle frame by shock-mounted isolator studs which are encapsulated in an elastomer and contained in a housing secured to the frame. An electronic package is mounted on the cold plate by a flange on the package which makes intimate contact with the surface of the cold plate for maximum heat transfer capability.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: April 8, 1980
    Assignee: The Unites States of America as represented by the Secretary of the Navy
    Inventor: Leon H. Groh
  • Patent number: 4164975
    Abstract: A heating system for a building structure is provided in which a heat pump system and at least one solar energy system and one air convector system are used. The solar energy system collects heat during the periods when sun energy is available and the air convector system collects heat when available from warm air. The heat from both systems is stored directly in the earth which surrounds the evaporator of the heat pump system.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: August 21, 1979
    Inventor: Edward W. Bottum
  • Patent number: 3968834
    Abstract: A heat exchanger core made up of a loose stack of heat exchange sheets is surrounded by a support frame which holds the sheets against separation. One end of the support frame is mounted on the engine body and restrained against vertical, fore-and-aft and sidewise movement relative to the engine body. The other end of the support frame is mounted on the engine body by a double pivot link assembly which restrains that end against vertical and sidewise movement but allows fore-and-aft movement. A simple expansion bellows joins the high-pressure air inlet of the heat exchanger to the engine body. A simple expansion bellows may be used to join either or both of the high-pressure air outlet and low-pressure hot exhaust gas inlet of the heat exchanger to the engine body.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: July 13, 1976
    Assignee: Caterpillar Tractor Co.
    Inventors: Ervin E. Mangus, Richard W. Kizer, D. Craig Young