Drive Release And Brake Patents (Class 192/144)
  • Patent number: 10486386
    Abstract: A slide lock device for a press machine in which a plurality of entry holes are formed in a flange portion of a flange member fixed on a shaft member, and that locks the shaft member not to rotate by a plurality of pin members inserted into and engaged with the plurality of entry holes, including an annular main body member fixed to a main body frame, a plurality of arcuate entry holes formed in the flange portion, an annular piston member installed within an annular cylinder bore formed in the main body member and shiftable along the axial direction, an annular first and second fluid pressure working chambers for driving the annular piston member, and adapted so that the plurality of pin members can be inserted into and through the entry holes and put into inserted positions by fluid pressure, and also can be backed out of the entry holes and changed over to retracted positions.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: November 26, 2019
    Assignee: Pascal Engineering Corporation
    Inventor: Seiji Kimura
  • Patent number: 10018232
    Abstract: A selectable one-way clutch includes a first plate, a second plate, a claw, a selector plate and a plate driving device. The selector plate rotates relative to the first plate between a locked position and a released position. The plate driving device includes a drive arm, an actuator, a transmission mechanism, a stopper and a release mechanism. The actuator outputs a driving force to drive the selector plate via the drive arm. The transmission mechanism transmits the driving force to the drive arm such that the selector plate rotates from the released position to the locked position. The stopper is configured to move between a restricted position and an unrestricted position. The stopper is placed at the restricted position when the actuator is not operated. The release mechanism transmits the driving force to the stopper such that the stopper moves from the restricted position to the unrestricted position.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: July 10, 2018
    Inventors: Kenji Itagaki, Naofumi Magarida
  • Patent number: 9571935
    Abstract: A loudspeaker includes a motor assembly having a back plate and a pole piece centrally disposed with respect to the back plate. The pole piece has a first end and a second end, where the pole piece has a center vent allowing bi-directional air flow in and out of the motor assembly. The motor assembly further includes a top plate concentrically disposed with respect to the pole piece, and a magnet disposed between the back plate and the top plate, wherein a magnetic air gap is defined between the pole piece and the top plate. The loudspeaker further includes a voice coil disposed in the air gap. The pole piece includes at least one NACA duct formed therein, the at least one NACA duct having an inlet located at an internal surface of the pole piece in fluid communication with the center vent and an outlet located at an exterior surface of the pole piece in fluid communication with the magnetic air gap in order to extract air flow from the center vent and redirect the air flow toward the voice coil.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: February 14, 2017
    Assignee: Harman International Industries, Inc.
    Inventor: Jerry Moro
  • Patent number: 8483922
    Abstract: The work vehicle includes a braking device, a lubricant feeding section, and a controlling section. The controlling section configured to execute a first control in which an amount of the lubricant fed to the braking device is controlled based on a temperature of a rotating member of the braking device. The controlling section sets the amount of the lubricant to a predetermined first feed amount when the braking device is in a braking state, calculates the temperature of the rotating member, and makes a decision in the first control, based on the calculated temperature of the rotating member, to change the amount of the lubricant from the first feed amount to a second feed amount, which is smaller than the first feed amount, when the braking device is switched from the braking state to a non-braking state.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: July 9, 2013
    Assignee: Komatsu Ltd.
    Inventors: Kazuki Kure, Kazuyuki Suzuki, Shigeru Yamamoto
  • Patent number: 8136607
    Abstract: A device has a torque-limiting unit of a power drill, wherein torque-limiting unit is intended to limit a screwdriving moment in a screwdriving function; and a power drill is provided with the new torque-limiting unit.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: March 20, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Karl Frauhammer, Gerhard Meixner, Heinz Schnerring
  • Patent number: 7684918
    Abstract: The invention relates to a PTO brake control system. There is a need for an improved and safe PTO brake control system. A PTO may be put into a driven and a non-driven condition an is braked by a PTO brake. A PTO brake control system includes a vehicle speed sensor and an ECU for controlling the PTO brake. The ECU deactivates the PTO brake when the vehicle is stationary and the PTO is not driven. This allows the PTO to be manually rotated to facilitate coupling of the PTO to an implement.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: March 23, 2010
    Assignee: Deere & Company
    Inventors: Jochen Busch, Klaus Zahn
  • Patent number: 7607183
    Abstract: In one embodiment, a braking system for a positioner unit in a medical imaging apparatus includes a first brake coupled to a drive unit that is configured to drive the positioner unit along an axis susceptible to influence of gravity. A second brake is coupled to the positioner unit, and configured for operating independently of the first brake. Examples of positioner unit include a patient cradle in a patient support table, and a C-arm and a pivot in a vascular gantry.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: October 27, 2009
    Assignee: General Electric Company
    Inventors: Baskar Somasundaram, Shaji Alakkat
  • Patent number: 7360635
    Abstract: An anti-pinch system of a vehicle closure includes a detection system for detecting pinching and a clutch to disconnect the vehicle closure from a closure driving mechanism following detection of pinching by the detection system. The closure drive mechanism can be disengaged to prevent an increase in pinching during the time required to reverse the movement of the closure driving mechanism.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: April 22, 2008
    Assignee: ArvinMeritor Light Vehicle Systems - France
    Inventors: Chris Rhodes, Paul Bizard
  • Patent number: 7310988
    Abstract: The invention provides a drive device for a mechanical press with a two-step speed reduction mechanism for driving a slide of the mechanical press and includes a drive pinion provided concentrically with a crankshaft, a main gear mounted on said crankshaft, intermediate gears meshing with the drive pinion, and intermediate pinions meshing with the main gear. A plurality of the intermediate gears and the intermediate pinions are provided concentrically with each other. An intermediate gear that meshes with the drive pinion is arranged concentric with an intermediate pinion that meshes with a main gear. This drive device provides a more compact mechanical press.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: December 25, 2007
    Assignee: AIDA Engineering Co., Ltd.
    Inventors: Hisanobu Kanamaru, Takao Ito
  • Patent number: 7296670
    Abstract: A disconnect mechanism is provided which, upon a suitable trigger event, such as excess temperature causes a camming element 40 having a tapered head 52 to move under the urging of a compression spring 60 such that the tapered head 52 becomes trapped between a rotating element 32 and a support 42. This gives rise to frictional inter-engagement which prevents further rotation of the rotating element 32 and thereby locks the rotating machine against further rotation. This is turn causes the shear region to fail thereby drivingly disconnecting the machine from its prime mover.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: November 20, 2007
    Assignee: Goodrich Control Systems Limited
    Inventors: Darren Christopher Howard, Dennis Richard Hayward, Rodney Stuart Howard
  • Patent number: 6994199
    Abstract: The invention concerns a load torque lock for automatically locking load-side torques in the case of a decrease or cessation of a drive-side torque having a housing (11) fixed to a frame, a locking ring (17) permanently connected to it and a locking body (17) cooperating with it and revolving on the drive side, with locking devices which, on the one hand, clamp on the locking ring (17) with the occurrence of a load torque by swiveling the locking body (17) by means of locking elements (27, 28) of the output shaft (15) and, on the other hand, release from the locking ring (17) by swiveling the locking body (17) back by means of driving elements (23, 24) of the drive shaft (14). To avoid undesired friction or defective jamming of the locking devices on the locking ring (18) by the centrifugal forces of the locking body (17) it is embodied in such a way that its mass center of gravity (M) lies in the area of the rotational axis of the drive shaft and the output shaft that are aligned with one another.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: February 7, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Ingo Drewe, Guido Schneider
  • Patent number: 6669072
    Abstract: Disclosed and taught is a novel drive mechanism for a cyclic operating tool employing an energized flywheel to provide the necessary energy to perform a working cycle. The drive mechanism disclosed is particularly useful in hand tool applications such as a hand held nailing machine. The flywheel may be energized by a corded or battery powered motor. The herein disclosed mechanism teaches a novel pair of ball ramp cam plates wherein a first pair of ball ramps cause an initial engagement of a clutch with the energized flywheel whereupon rotation of the clutch causes activation of a second pair of ball ramps which affect compression of a spring which acts to increase the pressure applied to the clutch thereby assuring a slip free engagement between the clutch and he flywheel throughout the working cycle of the drive mechanism.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: December 30, 2003
    Assignee: Senco Products, Inc.
    Inventors: John T. Burke, Shane R. Adams, Richard L. Leimbach, Conrad A. Garvis
  • Patent number: 6575088
    Abstract: A press with a press lock includes a press frame, a press ram slidably connected with the press frame, a rack fixedly connected with the frame, a pinion block connected with the ram, a pinion actuator operatively interconnected between the ram and the pinion block, and a control operatively connected with the pinion actuator. The press frame defines a stroke length and the press ram slides along the stroke length. The rack also extends along the stroke length, and the pinion block slides generally perpendicular to the stroke length, between open and closed positions of the press lock. The pinion block is also substantially fixed with the ram, relative to movement in a direction along the stroke length. The pinion block further engages the rack in the closed position, fixing the ram at a predetermined location along the stroke length, and disengages the rack in the open position, not inhibiting sliding of the ram along the stroke length.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: June 10, 2003
    Inventor: Charles J. Finkler
  • Patent number: 6053099
    Abstract: A system for use in a press machine includes a drive assembly in the form of a pinion gear that selectively engages the flywheel to enable operative driving rotation of the pinion gear by the flywheel. A load system in the form of a hydraulic pump is arranged in operative driving relationship with the pinion gear. Accordingly, rotational energy withdrawn from the flywheel becomes available for use in driving the hydraulic pump, which is preferably arranged in fluid communication with the press machine to supply a flow of oil for lubrication purposes. An adjustment assembly is arranged to controllably reversibly displace the pinion gear to effect its selective engagement with the flywheel. The pinion gear is provided with a geared peripheral surface for intermeshing engagement with the flywheel at a geared periphery thereof. The system may also be operated in reverse to drive the flywheel.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: April 25, 2000
    Assignee: The Minster Machine Company
    Inventor: Steven M. Gruber
  • Patent number: 5988342
    Abstract: The present invention provides a braking device of a linear motor table which can stop in a fixed state of the table when the electrical feed is cut off. A braking device 11 is installed, which comprises: a shaft 12 extending in the direction of movement and attached to the table 42; a retainer 14 movably inserted onto the shaft 12; balls 15 inserted into the pocket of the retainer 14 and rolling along the shaft 12; an outer cylinder 16 located including the retainer 14 and having a tapered surface 16a on the inside of the outer cylinder; a coil spring 18 for urging retainer 14 to be jammed onto the tapered surface 16a; and a linear electromagnetic solenoid 17 which urge the retainer 14 for making the balls 15 release the tapered surface 16a. When the electrical feed is cut off, the balls 15 are jammed on the tapered surface 16a by the action of a wedge, and the table is stopped.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: November 23, 1999
    Assignee: Nippon Thompson Co., Ltd.
    Inventors: Osamu Ito, Takaaki Tsuboi
  • Patent number: 5765668
    Abstract: A drop protection device for actuator devices of the type which are intended to raise and lower a load. The drop protection device includes a sleeve shaped member which, during normal operation of the actuator rotates along with a threaded spindle of the actuator. During rapid acceleration of the spindle, such as that experienced when the drive gear breaks down and the spindle rotates freely so as to cause the load to uncontrollably drop, the sleeve shaped member will, as a result of its mass inertia, be brought into contact with a stop device for preventing further rotation of the spindle. Thus, the drop protection device prevents the load from being damaged or causing damage to peripheral equipment or individuals.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: June 16, 1998
    Assignee: SKF Specialty Products AB
    Inventors: Par-Olof Hasselberg, Dag Arne Olofsson
  • Patent number: 5579878
    Abstract: A bi-directional clutch type chain pulling device for rolling doors for releasing the brake and rolling the door up by pulling the chain at an arbitrary direction has a chain sprocket which can be pulled by external force and which is pivoted thereon with a spring acted triggering plate, the sides of which are formed with a pair of branch legs and a projected actuating pin which is secured at an intermediate portion. A linkage pin is inserted into the rotating shaft and projects out. An intermediate disk has radially an elongate slide groove and has in the intermediate portion a cylinder having an inner hole, on the inner surface of the hole being provided with a friction ring which can be actuated via the actuating pin.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: December 3, 1996
    Inventor: Tsung-Wen Hsieh
  • Patent number: 5540042
    Abstract: The spinning rotor of an open-end spinning device is supported by means of a rotor shaft in the nip of at least one pair of supporting disks and can be driven by means of a tangential belt. A change-over device with a pressure roller is provided to press the tangential belt against the rotor shaft and a rotor brake which can be brought into action alternatively is provided. The change-over device is connected to a control lever which can be controlled as a function of the position of an actuator connected to a spinning station cover. The control lever is provided with an actuating arm. By opening the spinning station cover completely, a sufficient clearance can be produced between the actuator and the control lever so that the rotor brake can be deactivated through action exerted on the actuating arm of the control lever by means of the change-over lever on the one hand without allowing on the other hand the pressure roller to be yet actuated.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: July 30, 1996
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Edmund Schuller, Manfred Knabel, Erich Bock
  • Patent number: 5405216
    Abstract: An automatic, self locking clutch system effectuates blade pitch control on concrete finishing trowels. The clutch instantly releases upon the touch of the operator. A trowel has a downwardly projecting, motor-driven rotor comprising a plurality of radially spaced apart finishing blades directly contacting the concrete surface. A handle extends from a rigid frame and terminates in handlebars grasped by an operator. Control arms extend from the blades into contact with a plate to vary pitch by conventionally rotating the blades about their longitudinal axis. A clutch operatively interconnects a lever and a linkage extending to the swash plate. The clutch comprises a tubular housing coaxially receiving a drive shaft that rotatably controls an internal rotor. A set of spring biased, cylindrical rollers are confined within channels defined in the rotor between major and minor lobes thereof.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: April 11, 1995
    Assignee: Allen Engineering Corporation
    Inventors: J. Dewayne Allen, Ralph C. Luebke
  • Patent number: 5086890
    Abstract: A brake mechanism wherein a bracket is attached to a small engine. The bracket comprises two rotating arms, a spring, a brake pad and cable attachments. When an operator of a small engine releases a cable attached to the brake assembly, the spring rotates an arm which further engages a brake pad for slowing the engine and stopping it. The cable may be attached to either arm for releasing and engaging the brake pad, which allows the small engine to be mounted on an apparatus in more than one orientation.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: February 11, 1992
    Assignee: Briggs & Stratton Corporation
    Inventors: James F. Turczyn, Gary J. Gracyalny, David W. Baylor
  • Patent number: 5044478
    Abstract: A foot pedal operated control positioning device for a continuously variable transmission wherein a movable bushing is aligned with a preset stop in order to set the transmission into a known neutral condition.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: September 3, 1991
    Assignee: MTD Products Inc
    Inventors: Jurgen Kaesgen, Rudolf Siegrist
  • Patent number: 5040644
    Abstract: A brake mechanism wherein a bracket is attached to a small engine. The bracket comprises two rotating arms, a spring, a brake pad and cable attachments. When an operator of a small engine releases a cable attached to the brake assembly, the spring rotates an arm which further engages a brake pad for slowing the engine and stopping it. The cable may be attached to either arm for releasing and engaging the brake pad, which allows the small engine to be mounted on an apparatus in more than one orientation.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: August 20, 1991
    Assignee: Briggs & Stratton Corporation
    Inventors: James F. Turczyn, Gary J. Gracyalny, David W. Baylor
  • Patent number: 4889213
    Abstract: A safety device for an internal combustion engine powered implement and for disabling the operation of the internal combustion engine by means of a brake. The safety device includes a braking lever and a control lever which are both mounted on a single pivot member. Two springs are provided, the first of which normally urges the braking lever into contact with the flywheel of the internal combustion engine to prevent rotation thereof. The second spring biases the control lever into a rest position wherein the deadman control lever assumes its normal non-operated position and allows adjustment of control effort. The braking lever and control lever are mounted on the pivoting member by means of bushings to permit independent pivoting movement of the levers when the deadman lever is operated. The control lever contacts the braking lever by means of an abutment surface thereby rotating the braking lever out of contact with the flywheel and permitting the engine to operate.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: December 26, 1989
    Assignee: Tecumseh Products Company
    Inventor: Lee E. Roller
  • Patent number: 4643290
    Abstract: Rotational overtravel stops are often crucial components of actuators used in environments where not only cost but also power requirements, reliability, weight, size and simplicity are important. A bi-directional overtravel stop for a rotatable actuator shaft is disclosed which includes first and second brake plates secured for rotation with the shaft in opposite directions by a pair of oppositely disposed one-way clutches. A non-rotatable brake member is mounted for axial movement relative to the shaft and means are provided for biasing the brake member to frictionally engage one or the other of the brake plates when the shaft has reached the selected limit of its rotation in one direction or the other. The actuating structure of the overtravel stop includes a sleeve over the shaft and secured to the brake member, and a tubular threaded member over the sleeve, said threaded member and sleeve being secured against relative rotation and allowing telescoping relative to one another.
    Type: Grant
    Filed: December 4, 1985
    Date of Patent: February 17, 1987
    Assignee: Sundstrand Corporation
    Inventors: Jeffrey D. Metcalf, Gary D. Gillingham
  • Patent number: 4607732
    Abstract: In a crank or eccentric press a main shaft is rotatably supported over a reciprocating ram or rams. Nonrotatably mounted on one end of the main shaft, a drive gear meshes directly with a drive pinion on a drive shaft which partly projects out of one side of the drive housing and which has a driving flywheel mounted on the projecting end. The other end of the main shaft is geared to a brake shaft having a portion projecting out of the other side of the drive housing and having a brake mounted thereon. Within the drive housing one or more axially spaced pairs of main pinions are fixedly mounted on the main shaft. Each pair of main pinions are in mesh with two pairs of main gears rotatable about fixed axes. Each main gear has a crankpin projecting therefrom and operatively coupled to the ram. This drive system makes possible the reduction of the height of the press.
    Type: Grant
    Filed: February 4, 1983
    Date of Patent: August 26, 1986
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Naoaki Ikeoka, Akihiko Nakano
  • Patent number: 4582183
    Abstract: In a disclosed displacement detecting apparatus, a nut member retains a plurality of balls to circulate therein while in engagement with a helical groove of a screw shaft. The nut member is unrotatable and linearly movable, and the screw shaft is rotatable and linearly immovable. A rotation detector and a brake are attached to the screw shaft. The nut member may act as a piston of a cylinder in which the nut member is mounted, or may be connected to a separately provided piston of the cylinder.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: April 15, 1986
    Assignee: Kowa Shoji, Ltd.
    Inventor: Takeshi Kuroda
  • Patent number: 4580674
    Abstract: A control arrangement for a clutch and/or brake of a press, with the control arrangement including at least one of a clutch cylinder piston unit and a brake cylinder piston unit which opposes braking forces until a desired rotational speed is reached. The cylinder-piston units may be operationally controlled by at least one valve before the desired rotational speed is reached. The control arrangement is driven by at least two different pressures, with one of the pressures being at least approximately equal to a maximum clutch pressure or at least approximately equal to a pressure release, and the other pressure being a partial pressure which lies above a minimum response pressure of the clutch or below a counter pressure which triggers a minimal response pressure of the brake.
    Type: Grant
    Filed: October 24, 1984
    Date of Patent: April 8, 1986
    Assignee: L. Schuler GmbH
    Inventor: Heinz Weber
  • Patent number: 4579201
    Abstract: The bidirectional, torque-limiting, drive and brake mechanism has an input and output drive shafts and a helical spring which is normally in interference fit with the mechanism housing and, in the torque transmitting mode of operation, is disengaged to permit torque transmission by a direct mechanical coupling between the input and output drive shafts. The torque-limiting component, which functions to interrupt transmission of rotation from the input drive shaft to the output drive shaft upon a predetermined torque load, is adjustable to a selected predetermined torque load in the field.
    Type: Grant
    Filed: May 16, 1983
    Date of Patent: April 1, 1986
    Assignee: Curtiss Wright Flight Systems, Inc.
    Inventor: Robert K. Tiedeman
  • Patent number: 4576262
    Abstract: The method and apparatus are used for operating a magnetic clutch system of the type which includes a magnetic clutch having a clutch magnetizing coil which can be actuated to couple a first rotatable element to a second rotatable element when voltage is applied across the clutch magnetizing coil and which disengages the second rotatable member when voltage is disconnected from, or connected in reverse polarity across, the clutch magnetizing coil and which can include a brake with a brake magnetizing coil.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: March 18, 1986
    Assignee: Spartanics Ltd.
    Inventors: William L. Mohan, Samuel P. Willits
  • Patent number: 4298107
    Abstract: The braking system for the textile machine is provided with a multiplicity of brake elements which are individually controlled via a common control means. Each brake has a different braking characteristic from the other so that the machine components or attachments can be separately braked. The braking system can be electronically controlled so as to not only brake but also to permit adjustment of the brakes.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: November 3, 1981
    Assignee: Sulzer Brothers Limited
    Inventors: Gerd Schmitz, Otto Hintsch
  • Patent number: 4269293
    Abstract: A disconnect for disengaging an accessory rotor from a driving engine and quickly decelerating the accessory rotor to a stop.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: May 26, 1981
    Assignee: The Garrett Corporation
    Inventor: William B. Martin
  • Patent number: 4226311
    Abstract: A disc-type brake apparatus adapted for installation in combination with the drawworks of a well bore drilling operation for automatically sensing any reverse torque situation in the drill pipe and quickly set the brake for precluding transmission of any reverse torque to the rotary table drive and clutch mechanism therefor.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: October 7, 1980
    Assignee: Loffland Brothers Company
    Inventors: Earl R. Johnson, Lesley G. Watkins
  • Patent number: 4161649
    Abstract: A multimode electronic brake monitor system for use with power driven machinery having an absolute shaft encoder input for determining the position of a rotating or reciprocating member of the machinery, wherein both upstroke and downstroke preset allowable braking times are provided. In a normal mode of operation, the brake monitor system monitors each and every cycle of operation of the associated power driven machine and provides a precise measurement and a direct reading display of machine braking time in milliseconds. Automatic shutdown of the monitored power driven machine occurs should the measured braking time exceed either of two preset allowable braking times. In a thumbwheel mode, the brake monitor system is used to initiate a braking sequence at a presettable machine shaft angle whereupon either braking times in milliseconds or in degrees of shaft angle are measured and displayed.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: July 17, 1979
    Assignee: American Motors Corporation
    Inventors: Ted Klos, Herman J. Tiedt
  • Patent number: 4048886
    Abstract: A monitoring system is disclosed for measuring and classifying the decelerating capabilities of a machine, such as a punch press. The monitoring system includes a timing circuit for measuring the elapsed time from the initiation of brake application to the stopping of the press. Means are provided to distinguish between a regular top-stop in a single stroke press cycle from an emergency stop and to shut down the press if the stopping time is excessive for the type of stop being executed. The monitoring means is provided with a self-checking system which performs dynamic self-checking at the initiation of braking, at the stopping of the press, and at the initiation of clutching. In each self-checking cycle a fault simulating signal is propagated through two independent paths or through a path which has been previously checked.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: September 20, 1977
    Assignee: Xenex Corporation
    Inventor: John Francis Zettler
  • Patent number: 3992991
    Abstract: A rotary duplicator includes a handwheel for manually moving the cylinders to insert and remove masters, to make adjustments, etc. To minimize risk to the operator when the machine is running, there is provided a means for disconnecting the handwheel automatically and holding it stationary whenever the machine is turned on.
    Type: Grant
    Filed: June 19, 1975
    Date of Patent: November 23, 1976
    Assignee: Addressograph Multigraph Corporation
    Inventor: Robert M. Koch
  • Patent number: 3958753
    Abstract: An air driven centrifuge including a rotor chamber having a rotor seat mounted in the bottom thereof and including a rotor having a plurality of turbine flutes formed in an under side thereof. The rotor seat includes driving air jet means for impinging pressurized air streams against the turbine flutes of the rotor for supporting and spinning the rotor on an air cushion above the rotor seat. Support air jet means are also provided in the seat for directing pressurized air streams against the under side of the rotor for supporting the rotor when the driving air jet streams are inactivated. A brake and stabilizing means is included for decelerating the spinning rotor and includes a friction bearing means on the bottom portion of the rotor and a stabilizer means movable into engagement with the bearing means and cooperating with the bearing means to produce a frictional load against the bearing means thereby causing the rotor to decelerate and also stabilizing the rotor as it slows to a stop.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: May 25, 1976
    Assignee: Beckman Instruments, Inc.
    Inventors: Douglas H. Durland, Charles H. Chervenka, Malcolm C. McGilvray, Jr.