Slip Coupling Between Actuator And Valve Patents (Class 251/81)
  • Patent number: 8899548
    Abstract: The invention relates to a valve device for a combustion engine, in particular of an automobile, comprising a housing with at least two fluid connections and a hollow valve element rotatable between at least two rotational positions via a valve shaft supported rotatably in the housing, which valve element comprises at least two openings, which, depending on the rotational position of the valve element, can be connected with the fluid connections of the housing, further comprising an electromotive drive with a drive shaft for rotating the valve element, the drive shaft and the valve shaft being connected via a coupling with one another. According to the invention, the coupling connects the drive shaft and the valve shaft torque-proof with one another up to a predetermined threshold torque and releases the torque-proof connection between the drive shaft and the valve shaft above the predetermined threshold torque, so that rotation of the valve shaft relative to the drive shaft is possible.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: December 2, 2014
    Assignee: Illinois Tool Works Inc.
    Inventor: Torsten Hauk
  • Patent number: 8523140
    Abstract: A torque limiting device with an override mechanism coupled to a valve assembly capable of limiting the torque applied to the valve assembly and selectively being overridden to permit the application of excessive torque to the valve assembly. Tattletale devices capable of indicating when an override mechanism has been activated can also be integrated with the torque limiting device.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: September 3, 2013
    Assignee: Flowserve Management Company
    Inventors: William T. Dolenti, Byron A. Fleury, William C. Hooss, Daniel J. Morris
  • Patent number: 8490943
    Abstract: A valve of a heating, ventilation and/or air conditioning system includes an actuator with a housing and a shaft which is arranged at least partially in the housing and which can be coupled directly or indirectly to the valve such that the valve can be adjusted during a rotation of the shaft. A hand-operated element can be coupled to the shaft via an overload clutch arranged between the hand-operated element and the shaft which limits a torque which is transmitted onto the shaft by the hand-operated element to a predetermined maximum value. The overload clutch has a coupling element and a replaceable spring element which presses the coupling element against the shaft such that the maximum value for the transmittable torque is dependent on the replaceable spring element.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: July 23, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Daniel Bühler, Jörg Evertz, Martin Sprecher, Uwe Werner
  • Patent number: 8474786
    Abstract: Valve stem and valve plug apparatus for use with fluid regulators are described herein. An example fluid regulator includes a flow control member having a body that includes a longitudinal bore between a first end and a second end and a valve stem is disposed in the bore of the flow control member. A connector slidably couples the valve stem and the flow control member such that the connector moves away from the flow control member to relieve the flow control member of a loading force imparted by a loading element of the fluid regulator when the flow control member sealingly engages a valve seat of the fluid regulator.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: July 2, 2013
    Assignee: Emerson Process Management Regulator Technologies, Inc.
    Inventor: Gregg Alan Schneider
  • Patent number: 8474785
    Abstract: A valve assembly (1) comprising a valve housing (2), a stem (4) that is disposed perpendicular to the direction of flow within the valve housing (2), and a blocking member (3) which can be movably connected to the stem (4). The stem (4) is provided with a device (5) for limiting torque.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: July 2, 2013
    Assignee: Georg Fischer Wavin AG
    Inventors: Thomas Helmbold, Ozan Ufuk Topcuogullari, Oliver Trefz, Joerg Wermelinger, Peter Haug
  • Patent number: 8353498
    Abstract: In a manual switching valve, which enables a valve plug to be opened and closed manually, a piston is threadedly engaged with a shaft that is inserted through a housing, wherein a handle having a switching mechanism therein is installed on an upper end of the shaft. After a valve plug is seated on a valve seat, any further turning force applied to the handle is interrupted without being transmitted to the shaft owing to the fact that balls disengage from tooth portions of the shaft.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: January 15, 2013
    Assignee: SMC Kabushiki Kaisha
    Inventors: Yoshihiro Fukano, Tadashi Uchino
  • Patent number: 8262059
    Abstract: A torque limiting device with an override mechanism coupled to a valve assembly capable of limiting the torque applied to the valve assembly and selectively being overridden to permit the application of excessive torque to the valve assembly. Tattletale devices capable of indicating when an override mechanism has been activated can also be integrated with the torque limiting device.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: September 11, 2012
    Assignee: Flowserve Management Company
    Inventors: William T. Dolenti, Byron A. Fleury, William C. Hooss, Daniel J. Morris
  • Patent number: 8141583
    Abstract: A controller for controlling a valve is disclosed including a manifold assembly, a valve position indicator and a trigger assembly. An operating media distribution system is disposed in the manifold assembly and an electronic control unit is disposed in the controller. The electronic control unit operates at least one electromagnetic valve to control operating media flow via the operating media distribution system to activate an actuator which opens or closes the valve. The trigger assembly includes a cylinder adapted to receive an actuator shaft and provide a self setting mechanism corresponding to the stroke length of the actuator shaft.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: March 27, 2012
    Assignee: Westlock Controls Corporation
    Inventors: Leo Minervini, Eric Jordan, Robert Endres
  • Patent number: 8025268
    Abstract: A manual valve comprises a valve element, a rod connected to the valve element, and a knob for moving the rod by screw feeding in an opening/closing direction with respect to the valve element. The valve element is moved by rotation of the knob through the rod. The rod includes an external thread portion on an outer periphery thereof and is not connected to the knob and is held against rotation. Further, the manual valve includes a cylindrical sliding nut rotatably held by a body and formed with an internal thread portion to be engaged with the external thread portion of the rod on its inner periphery and a clip fixed to the knob to be elastically deformably engaged with the sliding nut but disengaged when a larger torque than the predetermined value is applied.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: September 27, 2011
    Assignee: CKD Corporation
    Inventors: Akinori Masamura, Tetsuya Ishihara
  • Publication number: 20090302246
    Abstract: A torque limiting device with an override mechanism coupled to a valve assembly capable of limiting the torque applied to the valve assembly and selectively being overridden to permit the application of excessive torque to the valve assembly. Tattletale devices capable of indicating when an override mechanism has been activated can also be integrated with the torque limiting device.
    Type: Application
    Filed: May 4, 2006
    Publication date: December 10, 2009
    Inventors: William T. Dolenti, Byron A. Fleury, William C. Hooss, Daniel J. Morris
  • Patent number: 7584936
    Abstract: According to the invention, a system for applying torque to a valve element that stops fluid flow through the valve is disclosed. The system may include an input element, a drive element, and a torque transferring mechanism. The input element may be configured to receive a torque. The drive element may be configured to apply substantially none of the torque, or at least a portion of the torque, to the valve element. The torque transferring mechanism may be configured to receive the torque from the input element, and transfer substantially none of the torque, or at least a portion of the torque, to the drive element based at least in part on a resistance of the valve element to turning.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: September 8, 2009
    Assignee: Matheson Tri-Gas, Inc.
    Inventors: Jeff Lewis, Stuart Muller
  • Publication number: 20080302985
    Abstract: To provide a handle with a torque limiter capable of performing the opening/closing operation of a flow passage with a specified tightening force, less causing wear and damage to a valve element even if repeatedly used, capable of stably controlling a flow rate over a long period, capable of securely performing the opening of the flow passage, and manufacturable at low cast and a fluid controller having the handle with the torque limiter. This handle with the torque limiter comprises a handle body (62) connected to an operating mechanism (5) vertically moving the valve element by a rotating operation and a cover body (61) fitted to the handle body. The handle body comprises a ratchet wheel (7), and the cover body comprises a ratchet claw (8) rotatable about a pivot shaft (81) and a spring (9) energizing a force to rotate the ratchet claw in a direction for engaging the ratchet claw with the outer peripheral teeth for the ratchet wheel.
    Type: Application
    Filed: September 27, 2005
    Publication date: December 11, 2008
    Inventors: Kunihiko Daido, Hisatoshi Akamoto
  • Patent number: 7290753
    Abstract: This invention relates to pressure torque sanitary diaphragm valves and methods of using torque sensitive sanitary valves in the production of chemical and biological therapeutics to obtain procedural reproducibility in the production pharmaceutical compounds and intermediates related thereto.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: November 6, 2007
    Inventor: Scott Christopher Meyers
  • Patent number: 7004447
    Abstract: This invention relates to pressure torque sanitary diaphragm valves and methods of using torque sensitive sanitary valves in the production of chemical and biological therapeutics to obtain procedural reproducibility in the production pharmaceutical compounds and intermediates related thereto.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: February 28, 2006
    Inventor: Scott Christopher Meyers
  • Patent number: 6745995
    Abstract: An improved cooling system for an internal combustion engine is disclosed. The system utilizes an electronically controlled butterfly valve to control coolant flow between the engine and a radiator, thereby maintaining the engine temperature at a substantially optimum temperature. The valve includes a valve housing having an inlet port in fluid communication with an outlet port. A valve core is seated in the housing for selectively opening and closing the outlet port. A driving mechanism is operatively coupled to the valve core for positioning the valve core between open and closed positions relative to the outlet port. A damping mechanism is coupled between the driving mechanism and the valve core for preventing the driving mechanism from locking in the open or closed position during loading of the valve core with the housing and inlet or outlet ports.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: June 8, 2004
    Assignee: Tesma International Inc.
    Inventors: Fuzheng Hu, David Mark Pascoe
  • Patent number: 6257874
    Abstract: A flame adjusting device for a gas burning device includes a flame adjusting wheel securely mounted to a disk of a valve on a gas tank and a neck extends from a side of the flame adjusting wheel and a ring is mounted to the neck. A protrusion extends from the ring and is accessible for the users. When shifting the protrusion, the ring and the flame adjusting wheel rotate to adjust the gas released via the valve. When a user wants to change the volume of gas released via the valve, he/she holds the protrusion and rotates the flame adjusting wheel so that the disk of the valve is rotated while the ring is remained still.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: July 10, 2001
    Inventor: Arlo H. T. Lin
  • Patent number: 5819791
    Abstract: A preferred embodiment of FIGS. 1-3 includes a check valve (10) with a pair of semicircular check valve members (34, 36) normally permitting fluid flow in one direction and blocking fluid flow in an opposite direction. Semicircular valve member (36) is releasably locked in an open position to permit a back flow upon manual rotation of handle (46) after manual gripping of knurled knob (84) and withdrawal of a locking pin (82) from a receiving opening (96). A safety lever (98) is pivoted out of a covering relation to knob (84) before knob (84) is gripped and prevents rotation of shaft (38) unless lever (98) is manually pivoted out of covering relation with knob (84). Another embodiment shown in FIG. 4 permits selective opening of a semicircular plate valve member (34A or 36A) to a releasably locked open position. Manual rotation of handle (46A) in one direction effects movement of semicircular valve member (36A) to an open position.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: October 13, 1998
    Assignee: Gulf Valve Company
    Inventors: James N. Chronister, James D. Phillips, Richard C. Gasaway, Ricky E. Pineda
  • Patent number: 5690313
    Abstract: A noiseless valve includes a leading spiral spindle (4) having a thread (8) at one end by which it is screwed into a spiral (8') of a piston holder (10). The piston holder (10) has a cylindrical shape and is placed into a valve body (1). The leading spiral spindle is secured by the key (13) in axial direction. A piston (12) is attached to an upper part (12) of the holder (10). The piston (16) has an edge rim with two teeth (18) cooperating with grooves (22) furnished on posts (21) of a rubber seal holder (19). The rubber seal holder (19) is attached to the valve body (1) at an end where the piston (16) stands out. The piston (16) is pressed against a rubber seal (23) placed in the rubber seal holder when the valve is closed. Two spiral teeth (6', 10'), disposed diametrically opposed and mutually shifted by 90.degree., are provided on a bottom head surface of the piston holder (10) and on a rim (6) of the leading spiral spindle (4).
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: November 25, 1997
    Inventors: Predrag Pesovic, Namanja Pesovic, Vojin Pesovic
  • Patent number: 5295907
    Abstract: A device for limiting the torque transmitted from a drive shaft to a driven shaft comprising a first body having a cylindrical portion and being adapted for rotation with one shaft and a second body having a cylindrical portion and being adapted for rotating the other shaft. The cylindrical portion of one body is mounted within the cylindrical portion of the other body for relative rotation with respect thereto about an axis which is eccentric to the axis of rotation of the one body. A pin carried by the cylindrical portion of the other body for radial movement with respect thereto has inner and outer ends, with the inner end held engaged with the cylindrical portion of the one body by a C-ring to allow the drive shaft to rotate the driven shaft until the torque transmitted between them overcomes the C-ring to allow the cylindrical portions of the bodies to rotate relatively to one another.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: March 22, 1994
    Assignee: AVA International Corporation
    Inventor: Neil H. Akkerman
  • Patent number: 5205482
    Abstract: A sanitary mixing unit, especially in the form of a single thermostat, has a cold and hot water inlet and a mixed water outlet. Valves for shutting off and controlling the water flow are arranged before the thermostat control and thus before the mixing chamber in the direction of flow. The valves are simultaneously activatable by a spindle. The movable valve closing members are fine adjustable independent from one another relative to the respective valve seats for a secure shut-off. An automatic fine adjustment of the movable valve closing members during shut-off of the mixing unit is provided by employing a central spindle with a fixedly arranged toothed wheel at its end section facing the valves. The toothed wheel engages two spur gears which are cooperating via a slip coupling with two single spindles of the valves.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: April 27, 1993
    Assignee: Ideal-Standard GmbH
    Inventor: Josef Ems
  • Patent number: 5152498
    Abstract: A valve has a housing, a valve spindle projecting outward from the housing and centered on and rotatable about an axis, and an actuating handle. Radially inwardly projecting and axially extending ridges are formed in the handle. An overload protecting coupling is formed by a sleeve fitted over the spindle and formed unitarily with a skirt having an inner surface spaced radially outward from the spindle and an outer surface formed with radially outwardly projecting and axially extending ridges meshing with the ridges of the handle. The skirt is formed with a plurality of axially inwardly open slots subdividing it into a plurality of ridged segments and it is elastically inwardly deflectable. Thus this sleeve forms a slip coupling that allows the handle to rotate the valve spindle until same is arrested, for instance at the end of its stroke, and thereafter turn independently of the spindle to prevent overloading it.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: October 6, 1992
    Assignee: Friedrich Grohe Aktiengesellschaft
    Inventor: Harald Korfgen
  • Patent number: 5083743
    Abstract: A rotatable rigid material valve operator is provided having a threaded shank threadedly engaged within a threaded blind bore formed in a valve member constructed of thermo plastic elastomer having an 80-90 "SHORE" scale durometer hardness and snugly slidingly disposed within a valve body bore against rotation relative thereto, the threaded shank being rotatable relative to the valve body against axial displacement relative thereto such that rotation of the threaded shank translates into axial shifting of the valve member within the valve body bore.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: January 28, 1992
    Assignee: Whitman Medical Corporation
    Inventors: Marvin Gordon, Sheldon P. Schmidt
  • Patent number: 5060909
    Abstract: The invention relates to a shut-off valve comprising a valve housing (12), a valve piston with valve cone (22) arranged up-stream of an associated valve seat (20), and a piston holder (16) axially movable within the valve housing (14) by means of a spindle (58) and accommodating said valve piston. To prevent overtightening of the valve piston, the piston holder (16) is connected to the valve housing (14) in the manner of a slip clutch. In addition, the outlet port (146) of the shut-off valve can be closed by a non-return valve.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: October 29, 1991
    Inventor: Miodrag Stanic
  • Patent number: 4984667
    Abstract: A security device is provided for coupling a rotational input force to an output shaft and includes a tubular housing with first and second ends and an internally-threaded bore extending therebetween. An externally-threaded screw member is threadably and reciprocably received in the housing bore and includes first and second ends. A slip clutch assembly is associated with the screw member second end and is adapted for drivingly innerconnecting the screw member and the output shaft. A socket assembly includes a clamp member with hingedly innerconnected jaws or sections which may be opened for placement over the screw member first end and closed for drivingly interconnecting the clamp member and the screw member. A collar nut may be placed over the clamp member for retaining it in its closed position.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: January 15, 1991
    Inventor: Harold M. Tjaden
  • Patent number: 4977641
    Abstract: A lever handle assembly for a sanitary water fixture which includes a spindle for actuating the fixture. The lever handle assembly comprises the handle adapter, a handle sleeve having a handle lever, and a friction coupling. The handle adapter nonrotatably connects over the spindle, and the friction coupling couples the handle adapter to the handle sleeve, whereby the spindle can be selectively opened or closed by actuating the handle lever.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: December 18, 1990
    Assignee: American Standard Inc.
    Inventor: Rudolf Steffes
  • Patent number: 4860992
    Abstract: A valve/actuator torque overload protector is disclosed as operably associated relative to driving and driven members which are pre-set to transmit limited torque during relative rotary movement between the members. A plurality of spring-loaded tapered rollers are mounted on one of the members for driving engagement with complementary detents on the other of the members. The spring-loaded tapered rollers are pre-set relative to the complementary detents*** in order to permit limited torque engagement of the driving and driven members during relative rotation thereof. However, upon encountering torque exceeding pre-set limits, the spring-loaded tapered rollers disengage from the complementary detent*** to interrupt the transmission of torque between the driving and driven members.
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: August 29, 1989
    Assignee: Aunspach Controls Co.
    Inventor: Dale Aunspach
  • Patent number: 4853160
    Abstract: A carburetor including a valve apparatus comprising a wall defining a chamber having an axis and having therein an inlet communicating with the chamber and an outlet communicable with the chamber and having a valve seat, a valve member having two opposite ends and a variable length in the direction of the axis which decreases only when at least a predetermined force is applied to the valve member in the direction of the axis, the wall supporting the valve member and being threaded so as to allow movement of the valve member along the axis and into and out of sealing engagement with the valve seat, the wall having a step extending into the chamber and engageable with the valve member, the step limiting the movement of one end of the valve member towards the valve seat.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: August 1, 1989
    Assignee: Outboard Marine Corporation
    Inventor: LeRoy T. Wood
  • Patent number: 4850567
    Abstract: A ball valve is provided with a blocking mechanism which automatically blocks its control shaft in its respective rotary position between a closure position and an open position when the control movement takes place too rapidly. The blocking mechanism responds to the respective rotary position of an annular inertia body which is rotatably mounted on the ball valve housing and the rotary movement of which effected by spring action is initiated by the rotation of the control shaft and is retarded by its inertia. On adequately slow actuation of the control shaft the blocking mechanism does not become operative. When the actuation is too rapid and could lead to potentially damaging high pressure peaks the control shaft is blocked by the blocking mechanism.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: July 25, 1989
    Assignee: Max Widenmann Armaturenfabrik
    Inventor: Martin J. Ambrosi
  • Patent number: 4705129
    Abstract: Pressurized fluid from an engine driven pump is supplied to and exhausted from the opposed chambers of a hydrostatic power steering servomotor through control passages in a valve housing and in a rotatable valve body coupled through viscous liquid to a steering control shaft. A pressure signal from the pressurized chamber of the servomotor is supplied by the control passages to a valve between the pump and fluid reservoir to limit operating pressure as a function of servomotor loading.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: November 10, 1987
    Assignee: Zahnradfabrik Friedrichshafen, AG.
    Inventor: Rolf Fassbender
  • Patent number: 4619437
    Abstract: Disclosed is a torque limiting valve handle having one more independently adjustable spring loaded balls urged in contact with depressions formed in the inside surface of a housing adapted for external manual engagement. The adjustment of the torque limit setting of the valve handle is protected from tampering or inadvertent modification by unauthorized personnel by the access to the adjustment requiring disassembly of the parts. One embodiment provides a torque lock in one direction of rotation. Another embodiment provides a torque limit override feature in either direction of rotation by an axial displacement of the housing of the handle with respect to an adaptor fixedly secured to the valve stem of the valve to which it is secured.
    Type: Grant
    Filed: January 29, 1986
    Date of Patent: October 28, 1986
    Inventors: William J. Williams, Richard E. Purkey
  • Patent number: 4407326
    Abstract: A valve actuating mechanism is disclosed and includes deactivating override means responsive to valve malfunction, such as sticking or binding of the valve. A drive motor is operatively connected through a drive train to a rotatable clutch housing. The clutch housing carries a clutch in the form of an open-ended ring spring. The clutch ring drives an output sleeve which is splined to an output shaft of the valve. The output shaft is rotatably fixed to a rotatable member which is effective to engage the clutch ring to disengage the ring from the clutch housing and effectively deactivate the drive train. The spline connection between the output sleeve and the output shaft comprises frangible means capable of being broken in the event the valve becomes stuck, whereby the output shaft, through the rotatable member, deactivates the drive train. The rotatable member also operates an indicating means whereby failure of the valve also is effective to preclude operation of the indicating means.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: October 4, 1983
    Assignee: Brunswick Corporation
    Inventor: Raymond L. Wilhelm
  • Patent number: 4338961
    Abstract: A valve structure is provided which can be opened and closed under operating conditions without any adjustment in conditions existing in the system in which the valve is an element. The valve element can be turned with respect to the seat to provide for proper relation between the valve element and the valve seat to grind one with respect to the other during the operating cycle. The valve also includes a clutch having a radial acting trip overload that prevents the valve seat from being damaged during grinding which is effected by turning the valve through the clutch while moving the valve toward the seat during the closing cycle and produces a controlled grinding operation independent of pressure within the valve.When the valve is operated in the opposite direction, the clutch disengages and the actuator mechanism encounters only the thrust forces during the opening cycle. This allows the valve to be easily opened without overloading the system.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: July 13, 1982
    Assignee: Anchor/Darling Valve Company
    Inventor: Anatole N. Karpenko
  • Patent number: 4287915
    Abstract: A control valve for controlling a routing of a pressure medium in pneumatic conduits, especially those in motor vehicles, wherein the control valve includes a housing provided with a cylindrical recess and a control slide guided in the cylindrical recess in a longitudinally-displaceable fashion. A gasket or sealing arrangement is provided by means of which a central pneumatic conduit is alternatingly connected, after an operating stroke of the control slide, to a pneumatic conduit lying to the left and to the right of the central pneumatic conduit. The control valve further includes an operating sleeve longitudinally displaceable between two compression springs supported on the control slide and between two detent locations. The operating sleeve is arranged on the control slide in such a way that, upon operation of the operating sleeve, the control slide is braked as soon as sealing elements of the sealing arrangement abut against respective opposite valve seat surfaces.
    Type: Grant
    Filed: May 21, 1980
    Date of Patent: September 8, 1981
    Assignee: Daimler-Benz Aktiengesellschaft
    Inventors: Rudiger Hoffmann, Dieter Feichtiger
  • Patent number: 3988891
    Abstract: A controlled member is movable between two end positions defined by respective first and second stops, particularly a flap-type valve member located in the exhaust gas conduit of an internal combustion engine movable between first and second end positions in which the valve member comes into abutment with respective first and second seating surfaces of the conduit.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: November 2, 1976
    Assignee: Robert Bosch G.m.b.H.
    Inventor: Alfred Hoyler
  • Patent number: 3976220
    Abstract: A chlorinator for swimming pool systems which releases a charge of chemical in response to the pressure differences generated by the circulating pump. The time during which the discharge valve is open is automatically varied in accordance with the pump pressure in a flow line by way of a trip device.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: August 24, 1976
    Assignee: GRW & Associates, Inc.
    Inventor: Hendrik de Kanter
  • Patent number: 3966032
    Abstract: A drive mechanism for an automotive transmission wherein a hydrodynamic drive unit and a friction drive unit are arranged for parallel independent drives. The friction drive unit is maintained in a slipping drive condition to control a predetermined slip in the hydrodynamic drive unit. The slip speed of the friction drive unit is controlled by an engagement force thereon, which force is determined by fluid flow through a variable area passage. The passage opening is responsive to the speed of the input and output members of the drive mechanism in direct relation with one member and a proportional relation with the other member.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: June 29, 1976
    Assignee: General Motors Corporation
    Inventor: Erkki A. Koivunen
  • Patent number: H636
    Abstract: The present invention is directed to a torque-limiting handwheel device for preventing manual valves from being damaged due to the application of excessive torque during the opening or closing operation of the valves. Torque can only be applied when ridges in the handwheel assembly engage in channels machined in the face of the baseplate. The amount of torque required for disengagement of the ridges from the channels is determined by the force exerted by various Bellville springs and the inclination of the side faces of the channels.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: June 6, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Philip G. Elliott, Daniel E. Underwood