Including Clutch Patents (Class 188/291)
  • Patent number: 10471858
    Abstract: A vehicle seat that includes: a support bracket that is provided at a floor of a vehicle; a rotation bracket that is coupled to the support bracket; a lock member that is provided at the floor; a lower rail being fixed to the rotation bracket and being locked by the lock member; an upper rail that is attached to the lower rail so as to be capable of sliding in a vehicle front-rear direction; a seat body that is fixed to the upper rail; a rotation force application member that applies rotation force to the rotation bracket such that the lower rail rotates in a direction in which the seat body springs up; and a speed reduction member that reduces a rotation speed of the rotation bracket in a case in which the seat body springs up.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: November 12, 2019
    Assignee: NHK Spring Co., Ltd.
    Inventors: Tetsuya Sasaki, Yukihiro Hakuta, Shigeo Fujii, Tomoyuki Sato, Daichi Takigawa
  • Patent number: 9062738
    Abstract: Damper for dampening the movement of a component, in particular a component in the interior of an automobile, comprising a damper housing and a damper element being located at least partially within the damper housing and being moveable with regard to the damper housing, and a spring element being in operational connection with the damper element and biasing the damper element in a first moving direction, wherein mechanical locking means are provided which inhibit a movement of the damper element with regard to the damper housing at least in the first moving direction when the spring element is biased, and in that the mechanical locking means are releasable.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: June 23, 2015
    Assignee: ILLINOIS TOOL WORKS, INC.
    Inventor: Jurgen Benno Hilpert
  • Patent number: 9016450
    Abstract: There is provided a method for controlling a hydrodynamic retarder. The method includes determining a presence of a retarder switch-off request, and keeping a separating clutch closed, after the determining, for a preset time span and emptying a working chamber of the hydrodynamic retarder of a working medium by continuous actuation of a rotating bladed rotor and interruption of infeed of the working medium into the working chamber. The method further included varying the preset time span according to at least one of the following parameters or at least one parameter correlated with one of the following parameters: a rotational speed of the rotating bladed rotor, an output pressure, against which the working medium is emptied from the working chamber, a filling level of the working chamber with the working medium, a temperature of the working medium, and a braking torque of the hydrodynamic retarder.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: April 28, 2015
    Assignee: Voith Patent GmbH
    Inventors: Achim Menne, Tilman Huth, Dieter Laukemann, Werner Koch, Werner Klement, Martin Becke
  • Patent number: 8899390
    Abstract: A damping mechanism that includes a housing with an inner circumferential surface defined by an assembly outer race, an axle shaft that is rotatable with respect to the housing, and a transmission assembly operatively associated with the axle shaft and disposed within the housing. The transmission assembly includes an assembly intermediate race. A fluid space that includes fluid therein is defined between the assembly intermediate race and the inner circumferential surface of the assembly outer race. A vane is disposed between the assembly intermediate race and the inner circumferential surface of the assembly outer race. The vane includes a restriction space defined therein. When the axle shaft rotates in the first direction, the transmission assembly transmits rotation from the axle shaft to the vane, and when the axle shaft rotates in the second direction, the transmission assembly transmits less rotation to the first vane than when the axle shaft rotates in the first direction.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: December 2, 2014
    Assignee: C&D Zodiac, Inc.
    Inventors: Stephen Kearsey, Richard McClure
  • Publication number: 20140182983
    Abstract: The invention concerns a hydrodynamic retarder having a rotor which can be brought into rotation via a drive unit and a fixed stator or a stator rotating in opposite direction to the rotor, whereas the rotor and the stator comprise bladed wheels, which form together a working chamber which can be filled with working medium; the drive unit is provided with a separating clutch, by means of which the rotor can be disconnected for its immobilisation, comprising a driven primary side and a secondary side associated with the rotor; having a control device which controls the opening and closing of the separating clutch for switching the retarder (17).
    Type: Application
    Filed: November 27, 2012
    Publication date: July 3, 2014
    Applicant: Voith Patent GmbH
    Inventors: Achim Menne, Tilman Huth, Dieter Laukemann, Werner Koch, Werner Klement, Martin Becke
  • Patent number: 8464843
    Abstract: The invention relates a lockable caster wheel. The lockable caster wheel can be widely used in shopping carts, luggage carts, strollers, turnover carts, stretcher cars and many other trolleys. The controlling mechanism of the lockable caster wheel comprises a controller which comprises a signal receiving device and a locking device which is controlled by the controller. The locking mechanism further comprises a revolving damper which comprises a shell having a restricting structure and a damping wheel located inside the shell. The shell, through its restricting structure, separates from or connects with the locking device to form unlocked or locked states. The damping wheel connects with the wheel assembly. The caster wheel uses a damper. Beyond the allowed area of use, the trolleys can be slowly pushed for a few of meters because of the damper effect, but it will not suddenly stop completely. Therefore it will not present danger to the users.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: June 18, 2013
    Assignee: Rocateq International B.V.
    Inventors: Ying Qiu, Liming Fang, Jinyuan Xu, Jie Ma
  • Patent number: 8276720
    Abstract: The present invention is a double path torsion isolator for use in conjunction with a torque converter. Each of the two vibration paths includes a flange with a spring connection to each of the torque converter cover and an output connection attached to the transmission shaft. The torque converter turbine is connected to one of the flanges to provide a different frequency to the associated vibration path. When the lockup clutch is engaged, the engine vibration is divided along the two vibration paths toward the common output connection. The vibration frequency of the paths are adjusted so that the frequencies of the two paths are 180° out of phase at the output connection providing a vibration cancellation effect to the output connection.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: October 2, 2012
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Rashid Farahati, Michael G. Swank
  • Patent number: 8220603
    Abstract: A rotary damper comprises a first component, a second component mounted rotatably on the first, a braking fluid interposed, between the first and the second component, and a third component mounted rotatably on the second component. The second and the third component form a lateral support surface and a lateral shaft surface which is rotatable within the lateral support surface, rolling elements being interposed between these surfaces. The arrangement is such that, in a first direction of rotation (A), the third component can rotate freely with respect to the second, and, in a second direction of rotation (B), the third component is rigidly coupled to the second. Recesses are formed on the lateral shaft surface, these recesses accommodating corresponding rolling elements and being shaped so as to create, in the second direction of rotation, a centrifugal displacement of the rolling elements such that the elements are locked between the recesses and the lateral support surface.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: July 17, 2012
    Inventor: Antonino Cultraro
  • Publication number: 20080308366
    Abstract: A damping device using viscous shear to moderate substantially linear movement. The device has a housing with one or more reservoirs containing a viscous fluid, such as silicone, and one or more retractable struts that can extend from the housing. The strut has a portion formed as a toothed rack, and an associated axle has a pinion gear on a portion associated with the toothed rack of the strut. The teeth of the rack mate with teeth of the pinion gear. A disk, or preferably series of spaced disks, can be mounted on the axle inside the reservoir to dampen linear movement of the strut, from shear with a static plate adjacent to the disk on the axle. The relatively fixed, spaced disks or plates are adjacent to or interdigitated with the disks on the gear axles to dampen linear movement of a strut.
    Type: Application
    Filed: June 15, 2007
    Publication date: December 18, 2008
    Applicant: HARTWELL CORPORATION
    Inventor: Timothy S. Rozema
  • Publication number: 20080302619
    Abstract: A rotary damper (15) comprises a first component (17), a second component (31) mounted rotatably on the first (17), a braking fluid interposed between the first (17) and the second component (31), and a third component (50) mounted rotatably on the second component (31). The second (31) and the third component (50) form a lateral support surface (35a) and a lateral shaft surface (55a) which is rotatable within the lateral support surface (35a), rolling elements (80) being interposed between these surfaces. The arrangement is such that, in a first direction of rotation (A), the third component (50) can rotate freely with respect to the second (31), and, in a second direction of rotation (B), the third component (50) is rigidly coupled to the second (31).
    Type: Application
    Filed: June 3, 2008
    Publication date: December 11, 2008
    Inventor: Antonino CULTRARO
  • Patent number: 6729447
    Abstract: The provision of a rotational speed controller which is capable of increasing braking torque without a corresponding increase in size, and easily outputting braking torque assumed in the design, and minimizing variations in the braking torque. A casing 6 incorporates a shaft 7 inserted therein, a first rotor 8 rotated together with the shaft 7 in one piece, and a second rotor 10 rotated through the medium of the first rotor 8 and a planet gear 9. A first rotation mechanism for rotating the first rotor 8 is the shaft 7. A second rotation mechanism for rotating the second rotor 10 is a planetary gear mechanism operated in association with the rotation of the first rotor 8.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: May 4, 2004
    Assignee: Tok Bearing Co., Ltd.
    Inventor: Kenji Takahashi
  • Patent number: 6695103
    Abstract: The invention concerns a spring barrel module having two chambers. A spring is located in the first chamber and a damper in the second chamber. The unidirectional damper is implemented by a clutch means that connects the damper plate to the spring shaft when the tightened spring is released, whereby the rotation of the damper slows down. Correspondingly, the clutch loosens the connection between the damper plate and the spring shaft when the spring is tightened. In low temperatures (e.g. below 0° C. degrees) the damper fails to dampen the rotation. The unidirectional feature of the damper improves both usability and durability. Breakage of the mechanical components of the spring barrel is prevented by an overload clutch, which means that the spring barrel module will tolerate even relatively rough handling of the equipment.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: February 24, 2004
    Assignee: Nokia Corporation
    Inventors: Ilpo Kauhaniemi, Antti Rönkkö, Matti Kosonen
  • Patent number: 6637567
    Abstract: A free run clutch apparatus is disclosed for damping movement of a device mechanically connected to the apparatus. The apparatus includes a housing which defines an enclosure and a rotor rotatably located within the enclosure, the rotor defining a cavity. A shaft has a first and a second end, the first end of the shaft being rotatably disposed within the cavity. A biasing device is disposed within the cavity between the first end of the shaft and the rotor. Also, a black oxide coating is coated on the biasing device such that when the shaft is rotated in a first direction, a free run of the biasing device within the cavity is permitted. However, when the shaft rotates in a second direction opposite to the first direction, the coated biasing device grabs the rotor so that damping of the rotation of the shaft in the second direction can be achieved.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: October 28, 2003
    Assignee: Illinois Tool Works Inc.
    Inventor: David A. Doornbos
  • Publication number: 20030178757
    Abstract: The invention relates to a spring element, comprising a sprung sheet (16, 17) which co-operates with at least one rolling body (20) in a first region (23) of the device. The rolling body impinges on a stopper (22) in a second region (25) of the device and opposite to the first region of the device with the sprung sheet. The stopper and sprung sheet are mounted in a displaceable manner relative to each other and, on such a displacement, the sprung sheet is bent. The above spring element may be applied to advantage in torsional vibration dampers (1) and preferably comprises a damping unit.
    Type: Application
    Filed: February 10, 2003
    Publication date: September 25, 2003
    Inventors: Ulrich Rohs, Christoph Drager, Werner Brandwitte, Dietmar Heidingfeld
  • Patent number: 6159123
    Abstract: The invention concerns a vehicle transmission for commercial vehicles having an additional continuous braking device wherein the additional continuous braking device, in addition to braking, is provided as a startup retarder (2) to start the vehicle.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: December 12, 2000
    Assignee: ZF Friedrichshafen AG
    Inventor: Gerhard Gumpoltsberger
  • Patent number: 5482148
    Abstract: The present invention is directed to a retarder control system for protection against transmission overspeed. The system operates in conjunction with a rotatable input member and an output member that is rotatable relative to the input member. A torque transfer device is operatively connected between the relatively rotatable input and output members. Specifically, a piston assembly is operated by an input control chamber that selectively receives pressurized hydraulic fluid which effects translation of the piston assembly to actuate the torque transfer device and thereby effect a driving connection between the relatively rotatable input and output members. The present system is adapted to control a hydrodynamic retarder assembly having a work cavity to receive hydraulic fluid. The retarder input valve assembly is supported from one of the relatively rotatable members selectively to deliver pressurized hydraulic fluid from the input control chamber to the retarder cavity.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: January 9, 1996
    Assignee: General Motors Corporation
    Inventors: Martin R. Dadel, Charles F. Long
  • Patent number: 5460252
    Abstract: A one-way rotary damper comprising a housing, a rotor consisting of a braking disk accommodated in a cavity of the housing and a shaft unitary with the braking disk and projecting toward the outside of the housing, viscous oil filling the housing cavity for applying shearing resistance against rotation of the rotor, a driven gear rotatably mounted upon the end of the rotor shaft projecting outside the housing so as to be free to rotate with respect thereto and formed on its surface facing the housing with a concentric depression consisting of a shallow circular depression and a deep outer annular groove surrounding the circular depression, a coupling disk which is identical in diameter with the circular depression and is fixed on the end of the rotor shaft projecting outside the housing so as to be disposed upon the circular depression, and a clutch spring disposed so as to extend along a radially outer surface of the coupling disk and a radially inner surface of the outer annular groove for enabling the driv
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: October 24, 1995
    Assignee: Illinois Tool Works Inc.
    Inventors: Akio Kosugi, Yoshio Shibanushi, Yoshiaki Nishiyama
  • Patent number: 5358081
    Abstract: The hydraulic retarder control system comprises pressure reducing valves which can switch the pressure of the air to be supplied from a pressure air source 4 to an air/liquid conversion device 25 at least to a low pressure, an intermediate pressure and a high pressure, or a proportional electromagnetic valve 110 which can reduce and adjust the pressure of the air in a stageless manner, and running speed detect devices 100, 111 which detect the fact that the running speed of a vehicle is equal to or slower than a given running speed. When there is given a detect signal by the running speed detect devices 100, 111, then the pressure reducing valves 32, 95 or the proportional electromagnetic valve 110 are or is switched over to a pressure higher than a set pressure for running speeds exceeding the given running speed, so that the high pressure air from the pressure air source 4 can be supplied to the air/liquid conversion device 25.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: October 25, 1994
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventors: Naoki Kaneda, Hideyuki Fujinami
  • Patent number: 5335563
    Abstract: A one-way damper comprising, one forming member for forming an accommodating chamber, other forming member disposed opposite to the one forming member such that the one and other forming members form the accommodating chamber therebetween and the other forming member is rotatable relative to the one forming member, a coil spring wound around the other forming member, and a viscous fluid accommodated in the chamber.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: August 9, 1994
    Assignees: Kuroishi Iron Works Co., Ltd., Oiles Corporation
    Inventors: Katsuhiko Yamamoto, Masamitsu Kojima, Kazuo Kato
  • Patent number: 5257852
    Abstract: A damper device for an automatic folding chair enables the seat of the chair to be turned downward to a ready-for use position without being subjected to any braking force when it is lightly pushed down. When the use leaves the seat in the ready-for-use position, it automatically and slowly returns to an upright position under a braking effort exerted thereto.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: November 2, 1993
    Assignees: Sugatsune Industrial Co., Ltd., Kotobuki Corporation
    Inventors: Ken Tsuneki, Kazuyosh Ohshima, Yojiro Nakayama
  • Patent number: 5211269
    Abstract: A damper for a flapdoor that does not show any damping effect when its movable shaft of the damper is rotated with the door in one sense whereas it effectively damps the rotary movement of the flapdoor when the movable shaft is rotated with the door in the other sense, wherein a one-way clutch for engaging or disengaging the movable shaft with a movable member depending on the sense of rotation of the movable shaft to cause a viscous shearing drag in the viscous fluid contained in the damper and a power source constitute so many integral parts of a coil spring. A damper for a flapdoor having such an arrangement can have a simplified configuration as compared with a damper provided with a separate coil spring as power source and a separate one-way clutch and therefore can be realized with reduced dimensions.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: May 18, 1993
    Assignee: Sugatsune Industrial Co., Ltd.
    Inventor: Kazuyoshi Ohshima
  • Patent number: 5170867
    Abstract: Pedal parking brake. This device is provided with a supporting shaft fixed to the side of a car body, a rotary body attached to another end of the supporting shaft, a damper case interposed between the supporting shaft and the rotary body, a lock spring latched to a lock releasing member, a clutch spring ineternally provided to the rotary body and the damper case being bridged thereon, and a viscous material filled in a clearance between the supporting shaft and the damper case.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: December 15, 1992
    Assignee: NHK Spring Co., Ltd.
    Inventors: Juji Ojima, Yoshiharu Kitamura, Kouichi Yamamuro
  • Patent number: 5165507
    Abstract: According to the invention, there is provided a damper for a flapdoor that does not show any damping effect when its movable shaft of the damper is rotated with the door in one sense whereas it effectively damps the rotary movement of the flapdoor when the movable shaft is rotated with the door in the other sense, wherein a one-way clutch for engaging or disengaging the movable shaft with a movable member depending on the sense of rotation of the movable shaft to cause a viscous shearing drag in the viscous fluid contained in the damper and a power source constitute so many integral parts of a coil spring. A damper for a flapdoor having such an arrangement can have a simplified configuration as compared with a damper provided with a separate coil spring as power source and a separate one-way clutch and therefore can be realized with reduced dimensions.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: November 24, 1992
    Assignee: Sugatsune Industrial Co., Ltd.
    Inventor: Kazuyoshi Ohshima
  • Patent number: 5078238
    Abstract: The brake system comprises a shaft interposed between two propeller shaft segments via universal joints, a radial compressor selectively connected with the shaft, a casing for housing the radial compressor and the shaft with the universal joints being outside the casing, and stay members mounted on the casing for allowing the casing to be suspended from the vehicle body. The brake system has a radial compressor which is selectively connected with the propeller shaft and consumes energy of the engine. The energy consumed is a result of the compressor serving as a brake force. The casing is fixed to the vehicle body so that the brake system also serves as a center bearing of the propeller shaft.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: January 7, 1992
    Assignee: Isuzu Motors Limited
    Inventor: Masaki Okada
  • Patent number: 5031738
    Abstract: A differential includes a planet gear through which two shafts coupled to laterally spaced road wheels of a motor vehicle are interconnected. The planet gear has a rotatable shaft with a brake mechanism coupled thereto. A braking force produced by the brake mechanism is transmitted through the differential to the road wheels depending on the rotational speeds of the road wheels. The brake mechanism may include either a turbine for producing a resistive force upon rotation thereof or a hydraulic damper comprising a hydraulic pump and a variable restriction.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: July 16, 1991
    Assignee: Isuzu Ceramics Research Institute Co., Ltd.
    Inventor: Masaki Okada
  • Patent number: 5007509
    Abstract: A brake system comprises an impeller selectively connected to a propeller shaft of a vehicle for consuming energy of the engine and applying a brake force to the propeller shaft, an impeller housing for rotatably housing the impeller and defining an air passage for introducing/discharging external air to/from the impeller, a throttle valve disposed in the air passage upstream of the impeller for adjusting the air flow rate in the air passage, and a negative pressure actuator for moving the throttle valve in accordance with the air flow rate in the air passage. The throttle valve is moved by the negative pressure actuator in accordance with the air flow rate in the air passage. In other words, the brake system adjusts the brake force mechanically by itself in a manner such that an excessive brake force is never applied to the propeller shaft. The brake system does not require a cooling device and only requires a simple arrangement for controlling the brake force.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: April 16, 1991
    Assignee: Isuzu Motors Limited
    Inventor: Yoshihisa Koizumi
  • Patent number: 4994003
    Abstract: A device for providing a variable retarding torque upon a rotating shaft includes an aerodynamic rotor and control means which is responsive to independent and external signals to continuously vary the ratio of the speed of the aerodynamic rotor as compared to the speed of the rotating shaft. The control means includes a multiple disc, dynamic, torque limiting friction clutch which is operable to vary the torque transferred between the rotating shaft and the rotor. Modulation of the dynamic clutch may be done at any time during active operation of the device.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: February 19, 1991
    Assignee: Anchor Tech, Inc.
    Inventor: Thomas A. Oldfield
  • Patent number: 4946014
    Abstract: A retarder adapted for use on a vehicle comprises: a blower connected to a crankshaft of the vehicle; a clutch provided between the blower and the crankshaft for selectively disconnecting the blower from the crankshaft; a speed change mechanism including a plurality of shafts, gears and bearings and provided between the crankshaft and the blower; an oil pump driven by energy transmitted from the clutch and the blower for supplying lubrication oil to the speed change mechanism; a sensor for detecting the pressure of the lubrication oil supplied to the elements of the speed change mechanism; and a control unit for allowing the clutch to disconnect the blower from the crankshaft when the lubrication oil pressure detected by the sensor is below a certain value. The blower consumes energy of the engine which is transmitted from the crankshaft, thereby applying a brake force to the engine.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: August 7, 1990
    Assignee: Isuzu Motors Limited
    Inventor: Masaki Okada
  • Patent number: 4846316
    Abstract: A hydraulic retarder and brake unit mounted on a rotating vehicle drive shaft has a first rotatable member forming a brake drum and mounted on the drive shaft for rotation therewith. A non-rotatable member supports brake shoes movable into frictional engagement with a lining of the brake drum and are actuated by the lever for frictionally braking rotation of the drive shaft. A plurality of stator vanes are formed on the non-rotatable member. A second rotatable member is mounted on the drive shaft for free rotation independently of the rotation of the drive shaft, while a plurality of rotor vanes are freely rotatably mounted around the drive shaft and in facing opposition to the stator vanes for providing a hydraulic coupling. A clutch selectively rotatably couples the second rotatable member with the first rotatable member so that the rotor vanes are rotated with the drive shaft and the rotation of the drive shaft retarded.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: July 11, 1989
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventor: Hideyuki Fujinami
  • Patent number: 4830151
    Abstract: A damper for damping rotation has a construction in which a rotor having a braking plate immersed in oil disposed within a casing and a gear are coupled together by a means of a clutch spring in the form of a coil spring. When the gear is rotated in one direction, it is coupled with the rotor as a result of diametrical contraction of the spring, and a restoring force is stored within the clutch spring, thus producing a resistance against rotation. When it is rotated in the opposite direction, the restoring force of the clutch spring is released so as to permit free rotation of the gear. The coil spring is coiled about a shouldered portion of the rotor shaft and a lower portion of a gear sleeve, supporting the gear, which have the same diametrical extent. In this manner, projecting end portions of the spring, upon which excessive loads have been impressed within the prior art, are able to be eliminated thereby providing extended service life to the spring and damper assembly.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: May 16, 1989
    Assignee: Nifco, Inc.
    Inventor: Masanori Numata
  • Patent number: 4827798
    Abstract: A device for providing a retarding force against the motion of a vehicle, which device does not intrude upon the engine, is not dependent upon the gear selected, and does not exhibit fade or skid characteristics. A torque limit clutch engages a ground engaging wheel of the vehicle with a first aerodynamic rotor. In one embodiment, the ratio of the speed of the aerodynamic rotor as compared to the speed of the ground engaging wheel is controlled by a serially connected variable-ratio gearbox. In another embodiment, the ratio is controlled by an epicyclic gear train, a second aerodynamic rotor and a pump.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: May 9, 1989
    Assignee: Anchor Tech., Inc.
    Inventor: Thomas A. Oldfield
  • Patent number: 4828079
    Abstract: For the improvement in the hydraulic retarder comprising a fixed member (1) of vehicle, a shaft (2), a housing (4), a vane chamber (3), a plurality of stator vanes (5) and a plurality of rotor vanes (7), a drum-like member (10), a plurality of clutch pistons (14a), (14b), (14c), a cylindrical member (6) a pair of arcuate brake shoes (16) and a parking lever (21) are added to function respectively.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: May 9, 1989
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventor: Hideyuki Fujinami
  • Patent number: 4796733
    Abstract: An oil damper is disclosed which comprises a cylindrical case open at one end and having a first engagement section formed upon the inner periphery thereof, an intermediate rotor having an inner cylinder and an outer cylinder, these cylinders being coaxial with respect to each other and defining an annular space open at one end, the outer periphery of the outer cylinder being provided with a second engagement section to be engaged with the first engagement section, the intermediate rotor being accommodated within the cylindrical case for rotation in only one direction, a cylindrical shaft rotor rotatably accommodated within the annular space, and viscous oil sealed within the annular space.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: January 10, 1989
    Assignee: Nifco, Inc.
    Inventor: Hiromichi Nakayama
  • Patent number: 4760901
    Abstract: A hydraulic braking system for braking a driven device, particularly a human powered vehicle, comprises a hydraulic pump, a clutch coupling the hydraulic pump to the driven device when the clutch is actuated, a hydraulic circuit for a liquid including a flow restrictor restricting the flow of the liquid therethrough, and a hydraulic connection from the pump to the hydraulic circuit. This arrangement is such that, when the clutch is actuated to couple the pump to the driven device, the flow restrictor imposes a hydraulic load on the driven device thereby braking it. The clutch is a jaw clutch including friction surfaces normally spaced apart but brought together, upon the actuation of the clutch actuator, before the jaws are brought into engagement with each other, to start the driven jaw to rotate before it moves into engagement with the driving jaw.
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: August 2, 1988
    Inventor: Shmuel Levavi
  • Patent number: 4715481
    Abstract: The invention relates to a hydrodynamic retarder having two independent operating circuits. Opposite a double rotor on the one hand is a stator fixed to a housing, and the rows of vanes concerned are inclined. The other half of the rotor forms with a rotatable stator and a second operating circuit having rows of blades equally effective in both rotational directions. The stator of this second operating circuit can be coupled via a gear unit and a coupling device to the retarder shaft. The gear unit drives the stator in a direction opposite to the direction of rotation of the rotor and with step-up transmission. When braking from a high travelling speed, only the first operating circuit is effective, the stator of the second operating circuit is released by the retarder shaft and freely rotates as well without any braking action.
    Type: Grant
    Filed: March 13, 1986
    Date of Patent: December 29, 1987
    Assignee: J. M. Voith GmbH
    Inventor: Klaus Brosius
  • Patent number: 4697673
    Abstract: A one-way damper has a rotor which is provided with a braking disc at one of its ends. The braking disc is received in a housing of the damper and the housing is filled with oil. The other end of the rotor extends outward from the housing and has a gear loosely mounted thereon. The gear is engaged with a coil spring. When the gear rotates in one direction, the coil spring is reduced in diameter so that it grips the rotor, making it possible for the torque of the gear to be transmitted to the rotor through the coil spring. When the gear rotates in the other direction, the coil spring is expanded in diameter so that it does not grip the rotor, making it possible for the gear to turn freely. The one-way damper is used in association with a lid or door to damp one but not the other of the opening and closing operations.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: October 6, 1987
    Assignee: Nifco Inc.
    Inventor: Nobuaki Omata
  • Patent number: 4574423
    Abstract: A rotary damper with a directional property is disclosed which is capable of being simplified in structure, manufactured with a low cost, and stably and precisely operated. The rotary damper is constructed in such a manner that a clutch spring is interposed between a revolving shaft and a rotor to selectively carry out the integral rotation of the rotor with the shaft or the stop of the rotor independent from the shaft.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: March 11, 1986
    Assignee: Fuji Seiki Kabushiki Kaisha
    Inventors: Kenji Ito, Masanori Watanabe
  • Patent number: 4350472
    Abstract: The present application discloses an electric fan apparatus comprising a fan, a wind direction shifting plate disposed in front of said fan and adapted to be rotated by the pressure of a wind generated by said fan, a rotary shaft disposed at the center of said wind direction shifting plate and adapted to be rotated integrally with said wind direction shifting plate, a speed governor mechanism interlocked with said rotary shaft and a housing box for housing said speed governor mechanism.With said wind direction shifting plate rotated, a wind may be provided in a wide range. Provision is made to improve the durability of said speed governor mechanism, which is formed with a gear mechanism and a blade. Said housing box contains a liquid into which at least a portion of said gear mechanism is immersed, so that said wind direction shifting plate is rotated at a substantially constant low speed.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: September 21, 1982
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Masao Morimoto
  • Patent number: 4324387
    Abstract: A pressure modulated hydrodynamic retarder is provided for a power delivery system and speed sensing means is provided for sensing the rotational speed of the output of the retarder for producing a corresponding pressure fluid flow which acts to vary the fluid relief pressure of a pressure control valve for the retarder and consequently varies the torque of the retarder in accordance with its rotor speed. In this manner the retarder is modulated as determined by its output speed and when the invention is used in a hoisting operation, as the lowering speed increases due to the falling load the retarding action of the retarder also increases. A particularly desirable form of sensing means includes a variable flow fluid pump which is driven at a speed proportional to the lowering speed of the load to proportionately vary the retarding ability of the retarder.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: April 13, 1982
    Assignee: Twin Disc, Incorporated
    Inventor: Horst G. Steinhagen
  • Patent number: 4191096
    Abstract: A time delay device for delaying movement in one direction and permitting relatively free movement in the opposite direction wherein alternate plate members and wall members in a housing are coated with a viscous grease and the plate members are rotated through a shaft connected by a one-way clutch to the control member whose motion is to be delayed.
    Type: Grant
    Filed: November 28, 1977
    Date of Patent: March 4, 1980
    Assignee: Schmelzer Corporation
    Inventor: Benjamin C. Benjamin
  • Patent number: 4117677
    Abstract: The stator assembly of a torque converter includes a stator wheel, a one-way brake for connecting the stator wheel to a stator shaft, a thrust washer provided on each side of the one-way brake and a pair of snap rings fixed to the stator wheel for locating the thrust washers. A gap is provided between the outer circumference of the thrust washer and the stator wheel to prevent undesirable engagement therebetween which would adversely effect the operation of the one-way brake.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: October 3, 1978
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Noboru Murakami, Choji Furusawa
  • Patent number: 4069545
    Abstract: A device for controlling the opening and closing movement of a duct seal door of an automatic ice maker which requires a regulator for slowing down the closing of the door. The movement of the door about its rotational axis is transmitted via connecting linkages to the closure regulator which comprises a rotor positioned within a stator housing. The rotor's movement is coupled to the connecting linkages via a one-way clutch which decouples the rotor when the door is being opened, and causes positive coupling therebetween when the door is being closed. Disposed within the stator housing in a fixed-volume compartment is a viscous fluid, such as silicone gum. The rotor and stator include opposed rippled surfaces between which the viscous fluid is coactively disposed. The fluid acts as an impedance to the motion of the rotor, which motion occurs only upon the closing of the door, to thereby provide a controlled slow closure thereof.
    Type: Grant
    Filed: October 22, 1976
    Date of Patent: January 24, 1978
    Assignee: General Electric Company
    Inventors: Kenneth M. Holet, Luis E. Prada
  • Patent number: 4018423
    Abstract: A descent device is provided for emergency descent from tall structures and for lowering objects from high elevations such as a hovering helicopter. The device includes a rotating spool having a cable wound thereon for descent and a rotation-retarding vane member which rotates in a fluid cylinder. An adjustable bypass is provided for the fluid as the vane member rotates therein so that the speed of descent can be adjustably controlled.
    Type: Grant
    Filed: October 16, 1975
    Date of Patent: April 19, 1977
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Robert R. Belew
  • Patent number: 3946989
    Abstract: A slow descender includes a rope pulley and a braking apparatus which restricts the rotation speed of the rope pulley. The braking apparatus includes a mechanical braking device containing a centrifugal brake which has centrifugal weights, a V-shaped lining part cooperating with the weights, and a speed multiplying gearing device connecting the rope pulley and the centrifugal friction brake. The slow descender further includes an oil hydraulic braking device of the vane pump type or of the inscribed gear pump type.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: March 30, 1976
    Inventor: Masao Tsuda