Speed Change And Excess Speed Valve Control Patents (Class 137/50)
  • Patent number: 8810427
    Abstract: Electronic control system for a submarine actuator, said actuator comprising a container body, from which a drive shaft projects that is suitable for inserting in a seat of said submarine device. The system comprises an electronic control board for at least one electric motor arranged inside said container body suitable for moving said drive shaft.
    Type: Grant
    Filed: December 19, 2009
    Date of Patent: August 19, 2014
    Assignee: Cameron International Corporation
    Inventors: Carlo Liberale, Fabio Imperiali
  • Patent number: 8066491
    Abstract: An air operated pump (10) uses a magnet (14) mounted in the valve cup (16) of the air motor (18) and two reed sensors (20) mounted in the valve cover (22) to monitor the speed and position of the valve (16). A solenoid (24) is mounted on the valve cover (22) and can be commanded to extend a plunger (26) into the valve cup (16) to stop valve movement and therefore the pump from running away. Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid (24) to monitor the solenoid movement.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: November 29, 2011
    Assignee: Graco Minnesota Inc.
    Inventors: Vu K. Nguyen, David M. Behrens, Christopher M. Lange
  • Publication number: 20090139580
    Abstract: A leno device uses the link mechanisms (31, 31?) to derive the movement of its half shaft (28) from the movement of its pull or lifting shafts (2, 3). The link mechanisms (31, 31?) connect the shaft rods (4, 5) of the pull or lifting shafts (2, 3) to the half shaft (28), whereby a connecting rod (32, 32?) extends between the two pull or lifting shafts (2, 3) from the top to the bottom through said shafts. The upper end of the connecting rod (32, 32?) is connected, on both sides of the connecting rod (32 32?) via connecting levers (33, 34, 33? 34?), to the joints (36, 37, 36?, 37?) that are connected to the upper shaft rods (4, 5) of the pull or lifting shafts (2, 3).
    Type: Application
    Filed: November 20, 2008
    Publication date: June 4, 2009
    Applicant: GROZ-BECKERT KG
    Inventor: Pascal Moser
  • Patent number: 7051750
    Abstract: A governor spring bracket assembly that attaches to an exterior surface of a shaft-mounted governor valve assembly for an automatic transmission is disclosed. The present governor spring bracket assembly functions to counterbalance the effect of centrifugal force on the governor valve weights, which is generated by rotation of the governor with the transmission output shaft. The present governor spring bracket assembly aligns and supports a calibrated compression spring in functional engagement with the primary governor valve weight to return it to its closed position in relation to the governor output circuit at low output shaft speeds thereby preventing excessive governor output pressure, 2nd gear starts, and improper shift timing.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: May 30, 2006
    Assignee: Sonnax Industries, Inc.
    Inventor: Frank Luisi
  • Patent number: 6908277
    Abstract: A speed governor for a pneumatic rotation motor having a pressure air inlet passage (15, 15?), an inlet valve (16; 56) including a flow controlling valve element (18; 58) located in the inlet passage (15, 15?), and a speed responsive activating device (24; 54) operatively connected to the inlet valve (16; 56), wherein the activating device (24, 54) comprises a pilot circuit with an activating surface (20; 70) on the valve element (18; 58), a restricted air supply opening (21, 72) communicating with the activating surface (20; 70), a bleed-off valve (24; 54) which communicates with the activating surface (20; 70) and which comprises an electromagnet actuator (27; 76), and a generator (30) driven by the motor and delivering to the actuator (27; 76) a voltage of a magnitude responsive to the actual motor speed to thereby make the bleed-off valve (24; 54) operate in response to the output voltage of the generator (30) and the actual motor speed.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: June 21, 2005
    Assignee: Atlas Copco Tools AB
    Inventor: Rolf Alexis Jacobsson
  • Patent number: 6899514
    Abstract: An overspeed safety device for a pneumatic rotation motor having a stator (10) with an air inlet passage (16), a rotor (12), and a speed governor for determining a maximum speed level, and comprising a speed responsive actuator (34) connected to the rotor (12) and a valve (33) shiftable by the actuator (34) from a normally open position to a closed position so as to block or substantially restrict the air flow through the inlet passage (16) at the attainment of motor speed levels exceeding a predetermined maximum level should the speed governor malfunction, wherein the actuator (34) comprises a spring biassed contact element (48) connected to the rotor (12) and responsive to centrifugal action, and the valve (33) comprises a disc-shaped valve element (36) pivotally supported in the inlet passage (16) and maintained in its open position by one magnet (42) and in its closed position by another magnet (43).
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: May 31, 2005
    Assignee: Atlas Copco Tools AB
    Inventors: Karl-Johan Lars Elsmark, Gunnar Christer Hansson, Anders Urban Jansson
  • Patent number: 6695573
    Abstract: A turbine tool design with a number of innovative aspects which may be incorporated into the tool individually or as a group. One aspect relates to improved speed control, based on an elastically deformable governor member disposed within the rotating impeller assembly and having a substantially uniform cross-section. Another aspect relates to a overspeed safety configuration that employs secondary, or “retro”, nozzles that are enabled when the elastically deformable governor member is removed from the impeller assembly. Another aspect relates to routing the motive fluid exhaust through the operator-adjustable throttle assembly. Still another aspect relates to an approach to axially preloading the bearings supporting the rotating shaft of the impeller assembly.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: February 24, 2004
    Assignee: Cooper Technologies Company
    Inventor: Philip Arnold Snider
  • Patent number: 6200111
    Abstract: A controllable positive displacement pump for liquids and gases which may contain dispersed phase particles includes a pair of pistons operating out of phase. Each of the pistons is associated with an inlet valve which includes a fixed grating defining slots which extend parallel to piston travel and a complementarily configured grating which reciprocates transversely in timed relationship with the piston to control the influx of fluid. A rotary outlet valve is also associated with each piston and includes a rotating member disposed transversely across the cylinder head and which rotates in synchronism to open a through, radial port in the member in timed relationship to the piston travel. The positive displacement pump finds particular application to transport powder paint.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: March 13, 2001
    Inventor: John F. Foss
  • Patent number: 6179552
    Abstract: A speed control unit for a pneumatic rotation motor having a stator (10) with an air inlet passage (14), a rotor (11) journalled in the stator (10). The speed control unit includes a speed governor (26) operated by two or more fly-weight members (28), and an overspeed safety device (27). The rotor (11) is formed with a coaxial blind bore (22) in which is secured a mounting structure (23) for supporting the fly-weight members (28), the valve element (29) and the bias spring (35) of the speed governor (26) inside the rotor (11). The overspeed safety device (27) includes a flow restricting element (39) displaceably guided in the air inlet passage (14) and locked in an inactive rest position by a trip element (43), and a speed responsive actuator (45) that is co-rotative with the rotor (11).
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: January 30, 2001
    Assignee: Atlas Copco Tools AB
    Inventor: Rolf Alexis Jacobsson
  • Patent number: 6158970
    Abstract: A variable displacement compressor that decreases displacement to reduce compression load without imbalancing the rotation of the drive shaft when the rotating speed of the compressor's drive shaft exceeds a predetermined limit value. The compressor includes a pressurizing passage connecting a crank chamber to a discharge chamber. A rotated guide rotates integrally with the drive shaft. The pressurizing passage is opened and closed by a valve body. Orbiting balls, which contact the valve body, are arranged about the axis of the drive shaft and the rotated guide. The balls follow the rotation of the rotated guide and orbit about the axis. The orbiting radius of the balls varies. A spring urges the balls in a direction decreasing the orbiting radius of the balls. When the rotating speed of the drive shaft exceeds the limit value, centrifugal force moves the balls against the force of the spring and increases the orbiting diameter of the balls.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: December 12, 2000
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Masaki Ota, Taku Adaniya, Kenta Nishimura, Hirotaka Kurakake, Osamu Hiramatsu, Hisakazu Kobayashi, Yasunori Makino, Ken Suitou, Kenji Takenaka
  • Patent number: 4465443
    Abstract: In a pneumatically powered portable tool there is provided a speed governor and an overspeed safety device the purpose of which are to ensure a predetermined maximum speed by controlling the air inlet flow to the motor. A cup-shaped shell insert (28) is detachably mounted in the housing (10) to form with the latter an air supply passage (58) and to support the valve means (51,53) of the overspeed safety device. The top surface of the shell insert (28) is exposed through an aperture (57) in the housing (10) and carries the maximum speed marking of the tool.
    Type: Grant
    Filed: October 14, 1982
    Date of Patent: August 14, 1984
    Assignee: Atlas Copco Aktiebolag
    Inventor: Karl G. Karden
  • Patent number: 4298317
    Abstract: In a pneumatically powered grinding machine provided with a flyweight operated speed governor there is incorporated an independently operating overspeed safety device which in case of malfunction of the speed governor is intended to obstruct further motive air supply to the motor of the machine. The overspeed safety device comprises an annular valve disk having two centrifugal weights which together with a suspender plate form a latch means by which the valve disk is kept in its open position at motor speeds not exceeding a predetermined level. In its open position, the valve disk is elastically bent about a diameter line as a result of the latch engagement between the centrifugal weights and the suspender plate. When the predetermined speed limit is reached, the valve disk is released from the suspender plate to occupy, while resuming its original flat shape, an air supply obstructing, closed position. The safety device is not resettable without dismantling the machine.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: November 3, 1981
    Assignee: Atlas Copco Aktiebolag
    Inventor: Gunnar C. Hansson
  • Patent number: 4278103
    Abstract: An overspeed control means for pneumatic tools which includes a split ring valve slidably arranged in a circumferential groove formed in a cage member affixed to the rotor shaft of the tool. When the cage member exceeds a predetermined rotational speed, the ring valve will expand and be moved, by pressure differential acting thereupon, into engagement with a valve seat to block holes in a flow circuit for pneumatic medium being conducted to the rotor of the tool, whereby tool operation is terminated.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: July 14, 1981
    Assignee: Chicago Pneumatic Tool Company
    Inventor: David A. Giardino