Patents Assigned to Pascal Engineering Corporation
  • Patent number: 10717220
    Abstract: An injection machine which includes a mold falling prevention device that prevents a mold fixed to a mold fixing surface from falling off from the mold fixing surface and in which are provided a bottom edge restriction member at a lower portion of said mold fixing surface so that its vertical position is variable, for implementing restriction so that the bottom edge portion of the mold does not separate from the mold fixing surface, first and second intermediate restriction members at intermediate level portions of the mold fixing surface so that their horizontal positions are variable, for respectively implementing restrictions so that a one edge portion of the mold and an other edge portion thereof in the horizontal direction do not separate from the mold fixing surface, and a vertical direction position determination mechanism that receives and stops a bottom edge surface of the mold and determines a position of the mold in the vertical direction.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: July 21, 2020
    Assignee: PASCAL ENGINEERING CORPORATION
    Inventor: Ichiro Kitaura
  • Patent number: 10518449
    Abstract: In a mold conveyance trolley, a trolley body includes vertical first and second side plates, first and second structural frames capable of providing rigidity in vertical planes to the front portion and the rear portion of the trolley body; and a plurality of plate members intersecting the first and second structural frames; each of the first and second structural frames includes a plurality of linking members disposed at different height positions and linked to the first and second side plates, and a plurality of steel pipe members fitted over each of the plurality of linking members and have a spacer function.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: December 31, 2019
    Assignee: Pascal Engineering Corporation
    Inventor: Ichiro Kitaura
  • Patent number: 10518390
    Abstract: The fluid clamp apparatus includes: a sliding piston member that vertically partitions its cylinder bore; first and second fluid pressure operation chambers; a fluid passage that, during an upward light-load stroke of the piston member, causes the back pressure in the second fluid pressure operation chamber to be received by the output rod to advance the output rod; a force multiplying mechanism that, during a heavy-load stroke of the piston member, multiplies the force acting on the piston member and transmits this force to the output rod; and a link mechanism that, during unclamping lowering operation of the piston member, links together the output rod and the piston member after lowering by a predetermined stroke amount.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: December 31, 2019
    Assignee: Pascal Engineering Corporation
    Inventor: Takuya Takahashi
  • 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: 10316870
    Abstract: A hydraulic cylinder includes a rod insertion hole formed in a piston member, an auxiliary rod provided to a head side end wall member and capable of being inserted into the rod insertion hole, a rod fitting hole formed to pass through the head side end wall member and the auxiliary rod, a movable rod installed in the rod fitting hole and whose end portion toward a head side end wall projects to the exterior, a movement restriction mechanism that prohibits shifting of the movable rod in an unclamping state and permits shifting of the movable rod in a clamping state.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: June 11, 2019
    Assignee: Pascal Engineering Corporation
    Inventor: Ichiro Kitaura
  • Patent number: 10252387
    Abstract: A balancer mechanism for a rotating shaft is configured to prevent deviation of the axis of the rotating shaft. The balancer mechanism (20) has an assistance torque generation device (21) for generating an assistance torque. The assistance torque generation device (21) includes a cam member (24) fixed to the rotating shaft (4), a cam follower member (25) and a gas spring (27). The balancer mechanism has a reaction force generation device (22) provided for generating, a balancing moment on the rotating shaft that cancels out a tilting moment that tilts the rotating shaft (4) around a bearing member (9) in a direction to separate it from the assistance torque generation device (21) and which is caused by the biasing force of the gas spring (27).
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: April 9, 2019
    Assignee: Pascal Engineering Corporation
    Inventors: Ichiro Kitaura, Takashi Ninomiya
  • Patent number: 10035227
    Abstract: A positioning device capable of increasing the amount of diametrical expansion of an engagement member to be engaged in a cylindrical hole in a workpiece, and capable of performing positioning while not exerting any force on the workpiece in the downward direction positions a cylindrical hole (Ha) in a workpiece (W) in a first direction while permitting shifting thereof in a second direction, the device comprising: the insertion shaft member; a hydraulic cylinder for driving the insertion shaft member; a pair of engagement members; a taper engagement mechanism for shifting the engagement members to increase their diameter; and a movement permitting holding mechanism that, along with supporting the engagement members, so that they cannot shift in the first direction but are capable of shifting in the second direction.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: July 31, 2018
    Assignee: Pascal Engineering Corporation
    Inventor: Takayuki Kawakami
  • Patent number: 9951799
    Abstract: An open/shut valve mechanism for detecting that a piston member of a hydraulic pressure cylinder has reached an unclamp position comprises: a valve body reception hole that communicates with a unclamp hydraulic pressure operating chamber, a valve body movably received in the valve body reception hole and having an annular concave engagement portion on its external circumferential portion; a spherical body that is movably installed in a cylinder main body and that can engage with the concave engagement portion; and an engagement portion that is formed on an auxiliary rod and with which the spherical body can engage; and when hydraulic pressure is charged into the unclamp hydraulic pressure operating chamber and the piston member has reached its unclamp position, the valve body receives the hydraulic pressure, a portion of the spherical body engages to the engagement portion and the valve body changes over to the valve closed position; and, when the piston member has shifted from its unclamp position, the spher
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: April 24, 2018
    Assignee: Pascal Engineering Corporation
    Inventor: Takayuki Kawakami
  • Patent number: 9822771
    Abstract: An air driven reciprocating piston hydraulic pump having a main changeover valve with a main valve body having an annular valve body portion which includes first and second annular valve faces that approach closely or contact first and second annular valve seats on valve cases which are formed on the upper and the lower ends of the annular valve body portion. An air intake chamber is defined by a piston reception hole and a drive piston portion, and an auxiliary changeover valve changes over the main changeover valve between its air supply position and its air discharge position by supplying compressed air to the air intake chamber or discharging air therefrom via a first and second valve members and a small diameter portion of a valve rod. A center side portion of the main valve body is made as a separate auxiliary valve body for facilitating up and down motion thereof.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: November 21, 2017
    Assignee: Pascal Engineering Corporation
    Inventor: Motoki Suita
  • Patent number: 9789659
    Abstract: A slide lock apparatus for a press machine includes: a flange member fixed over the shaft member for driving the slide, and having a flange portion; an annular main member fixed to the main frame, and having an annular member facing the flange portion; a plurality of reception holes formed in the annular member; a plurality of pin members installed in the plurality of reception holes so as to be shiftable therein; a plurality of actuators for driving the plurality of pin members between retracted positions and advanced positions penetrating into admission holes in the flange portion; a first locking member for locking the plurality of pin members in retracted positions; a first drive device for rotationally driving the first locking member; a second locking member for locking the plurality of pin members in their advanced positions; and a second drive device for rotationally driving the second locking member.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: October 17, 2017
    Assignee: Pascal Engineering Corporation
    Inventors: Ichiro Kitaura, Akitake Hashidate, Seiji Kimura
  • Patent number: 9789588
    Abstract: A fluid pressure cylinder comprises a rod insertion hole formed in a piston member, an auxiliary rod provided to a head side wall member so as to be inserted into the rod insertion hole, an open/shut valve mechanism for detection, and a fluid passage that is opened and shut by the open/shut valve mechanism. The open/shut valve mechanism includes a valve body reception hole formed in the auxiliary rod, a valve body that is movably held in the valve body reception hole and that has a recessed engagement portion on its external peripheral portion, and a spherical body mounted on the auxiliary rod so as to engage with the recessed engagement portion; when the piston member has reached a set shifting position, the valve body is changed over to the closed position or to the opened position due to cooperation between the spherical body, the recessed engagement portion, and the inner peripheral wall portion of the rod insertion hole.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: October 17, 2017
    Assignee: Pascal Engineering Corporation
    Inventor: Takayuki Kawakami
  • Patent number: 9731390
    Abstract: In an object positioning/fixing device that positions and fixes a target object on a base member in the horizontal direction and in the vertical direction, a structure is provided in which, in a state in which the target object is pressed against the base member and fixed thereon by a fixation mechanism: first and second tapered engagement surfaces of first and second reference members are closely contacted against the inner circumferential surfaces of first and second annular engagement members via elastic deformation of the first and second annular engagement members; also first and second base end contact surfaces of the first and second reference members are contacted against the base member; and a pair of regulated surfaces of the second annular engagement member are closely contacted against a pair of regulating surfaces of a second installation hole via elastic deformation of the second annular engagement member.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: August 15, 2017
    Assignee: Pascal Engineering Corporation
    Inventor: Takayuki Kawakami
  • Publication number: 20170198729
    Abstract: A hydraulic cylinder includes a rod insertion hole formed in a piston member, an auxiliary rod provided to a head side end wall member and capable of being inserted into the rod insertion hole, a rod fitting hole formed to pass through the head side end wall member and the auxiliary rod, a movable rod installed in the rod fitting hole and whose end portion toward a head side end wall projects to the exterior, a movement restriction mechanism that prohibits shifting of the movable rod in an unclamping state and permits shifting of the movable rod in a clamping state.
    Type: Application
    Filed: April 10, 2015
    Publication date: July 13, 2017
    Applicant: PASCAL ENGINEERING CORPORATION
    Inventor: Ichiro KITAURA
  • Patent number: 9511466
    Abstract: A fluid pressure cylinder and a clamp device that, when an output member arrives at a prescribed position such as, in particular, an advance limit position or a retraction limit position, are capable of detecting the position of the output member on the basis of change of air pressure as, due to an opening/closing valve mechanism, the communication state of an air passage within the clamp main body is changed over together with the operation of the output member.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: December 6, 2016
    Assignee: PASCAL ENGINEERING CORPORATION
    Inventor: Takayuki Kawakami
  • Publication number: 20160052096
    Abstract: A positioning device capable of increasing the amount of diametrical expansion of an engagement member to be engaged in a cylindrical hole in a workpiece, and capable of performing positioning while not exerting any force on the workpiece in the downward direction positions a cylindrical hole (Ha) in a workpiece (W) in a first direction while permitting shifting thereof in a second direction, the device comprising: the insertion shaft member; a hydraulic cylinder for driving the insertion shaft member; a pair of engagement members; a taper engagement mechanism for shifting the engagement members to increase their diameter; and a movement permitting holding mechanism that, along with supporting the engagement members, so that they cannot shift in the first direction but are capable of shifting in the second direction.
    Type: Application
    Filed: February 14, 2014
    Publication date: February 25, 2016
    Applicant: PASCAL ENGINEERING CORPORATION
    Inventor: Takayuki KAWAKAMI
  • Patent number: 9242324
    Abstract: A grip member is inserted into an insertion hole of a cylindrical clamp body and is capable of extending outwards to grip the inner circumferential surface of an aperture of an article. A clamp rod is engaged with the grip member; a driving mechanism capable of driving the clamp rod forwards and backwards; a seating surface formed at the top end of the cylindrical clamp body; a case member supporting the cylindrical clamp body movably forwards and backwards; a driving mechanism capable of raising an lowering the cylindrical clamp body; and a lock mechanism having a cylindrical member into which the cylindrical clamp body is inserted so as to slide freely and capable of locking the outer circumferential surface of the cylindrical clamp body by elastically deforming the cylindrical member so as to reduce its diameter.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: January 26, 2016
    Assignee: Pascal Engineering Corporation
    Inventor: Takayuki Kawakami
  • Publication number: 20150285280
    Abstract: An open/shut valve mechanism for detecting that a piston member of a hydraulic pressure cylinder has reached an unclamp position comprises: a valve body reception hole that communicates with a unclamp hydraulic pressure operating chamber, a valve body movably received in the valve body reception hole and having an annular concave engagement portion on its external circumferential portion; a spherical body that is movably installed in a cylinder main body and that can engage with the concave engagement portion; and an engagement portion that is formed on an auxiliary rod and with which the spherical body can engage; and when hydraulic pressure is charged into the unclamp hydraulic pressure operating chamber and the piston member has reached its unclamp position, the valve body receives the hydraulic pressure, a portion of the spherical body engages to the engagement portion and the valve body changes over to the valve closed position; and, when the piston member has shifted from its unclamp position, the spher
    Type: Application
    Filed: September 20, 2013
    Publication date: October 8, 2015
    Applicant: PASCAL ENGINEERING CORPORATION
    Inventor: Takayuki Kawakami
  • Patent number: 9061387
    Abstract: An article positioning mechanism for positioning an article comprising a component or a tool with respect to a mounting portion of a movable member of a mechanical device and also restraining rotation thereof includes a holder member to which the article is fixed and a frame shaped member that is fixed to the mounting portion, the holder member including position regulation surfaces and a tapered male engagement portion that is formed as a regular polygon and also is sloped so as to approach its axis in the direction towards the mounting portion, the frame shaped member including a reference surface that receives the position regulation surfaces and positions them in the axial direction, and a tapered female engagement portion that is formed as a regular polygon and also is sloped in the same direction as the tapered male engagement portion.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: June 23, 2015
    Assignee: Pascal Engineering Corporation
    Inventors: Ichiro Kitaura, Takayuki Munechika
  • Patent number: 9061385
    Abstract: A clamp device has a gripping member which is expandable and contractible and is inserted into an aperture in a workpiece and grips the aperture, a clamp rod including a tapered shaft portion that fits into the gripping member, and a drive means for driving the clamp rod forwards and backwards. Provided is a support mechanism that supports the gripping member by fluid pressure when the gripping member is radially expanded, and a fluid pressure release means that releases the fluid pressure of the support mechanism after radial expansion of the gripping member when the clamp rod is driven by the drive means to perform clamping. The support mechanism has an annular pressure reception member that supports the gripping member, and a supporting fluid chamber that causes fluid pressure in the direction opposite to the clamping direction to be received on the annular pressure reception member.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: June 23, 2015
    Assignee: Pascal Engineering Corporation
    Inventor: Takayuki Kawakami
  • Patent number: 9033323
    Abstract: A clamp device includes a clamp main body, an engagement assembly, a clamp rod, a drive mechanism, and a support mechanism. The engagement assembly can be changed over between a diameter-expanded state in which it engages with an inner circumferential surface of an aperture in a workpiece, and a diameter-reduced state in which it does not so engage. The clamp rod is engaged with an interior of the engagement assembly. The drive mechanism drives the clamp rod to and from the clamp main body. The support mechanism supports the engagement assembly with a pneumatic force of pressurized air. At least a part of the pneumatic force is released after the engagement assembly has been expanded in diameter.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: May 19, 2015
    Assignee: Pascal Engineering Corporation
    Inventor: Takayuki Kawakami