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    HYDRAULIC ACTUATING UNIT, IN PARTICULAR FOR RAISING A LOAD, SUCH AS A HOSPITAL BED
    12.
    发明专利
    HYDRAULIC ACTUATING UNIT, IN PARTICULAR FOR RAISING A LOAD, SUCH AS A HOSPITAL BED 未知

    公开(公告)号：CA1308626C

    公开(公告)日：1992-10-13

    申请号：CA603276

    申请日：1989-06-20

    Applicant: APPLIED POWER INC

    Inventor： SCHMALE FRED W ,  OUDELAAR TONE

    IPC: F15B11/00 ,  A61G7/00 ,  A61G7/012 ,  A61G7/018 ,  F15B1/02 ,  F15B1/027 ,  F15B13/042

    Abstract: A hydraulic actuating unit for raising a hospital bed includes a reservoir, a hydraulic piston cylinder device the cylinder of which has its ends con-nected to the reservoir through a supply conduit that contains a hydraulic plunger pump with suction and pressure valve means and through a return conduit which contains an orifice in a normally closed relief valve. A branch conduit leads to a hydraulic liquid accumulator from the supply conduit at a location between the cylinder and pressure valve means. A multiple pilot operated check valve of the differential type is provided in the branch conduit to-wards the accumulator. The largest and smallest end faces of the differential spool member are subject to the pressure in the branch conduit while the differential area of the spool member is subject to the pressure in a conduit whichleads from the return conduit at a location between the orifice and the relief valve. The pressure in the branch conduit to the accumulator tends to cause the spool member and the check valve to open while the pressure in the return conduit tends to move the spool member into a closed position.

    TILTCAB TRUCK WITH HYDRAULIC LOST MOTION
    13.
    发明专利
    TILTCAB TRUCK WITH HYDRAULIC LOST MOTION 未知

    公开(公告)号：CA1178167A

    公开(公告)日：1984-11-20

    申请号：CA416962

    申请日：1982-12-03

    Applicant: APPLIED POWER INC

    Inventor： OUDELAAR TONE

    IPC: B62D27/06 ,  B62D33/067 ,  B62D33/08 ,  B62D33/06

    Abstract: TILTCAB TRUCK WITH HYDRAULIC LOST MOTION Disclosed is apparatus for permitting hydraulic lost notion between the push chamber and the pull chamber of the tilt cylinder(s) for a tiltcab truck. The apparatus comprises a pilot-operated check valve having a through passage (a) which is part of a hydraulic connection between the push chamber and the pull chamber and (b) which is only shut off when hydraulic pressure is applied to the push chamber(s) of the tilt cylinder(s).

    18.
    发明专利
    未知

    公开(公告)号：NL9401680A

    公开(公告)日：1996-05-01

    申请号：NL9401680

    申请日：1994-10-12

    Applicant: APPLIED POWER INC

    Inventor： OUDELAAR TONE

    IPC: B62D33/067 ,  F15B15/26 ,  F16J10/00 ,  B62D33/07

    Abstract: PROBLEM TO BE SOLVED: To form the parts of a safety device with a low strength material by arranging the safety member near a fixed portion and stretching a projection member in the groove of the fixed portion through the opening of the safety member at the locking position time of a piston cylinder assembly. SOLUTION: A fixed portion 6 is arranged near a safety member 1 and at the stretching time of a piston rod, the safety member 1 slides under a projection member 8 and bracket 7 and the projection member 8 is pushed into the opening 2 by a twist spring pressure and into the groove 13 of the fixed portion 6 during passing the opening 2 of the safety member 1. When the piston rod is further stretched, the projection member 8 is pushed up to the rear side of the opening 2 and inclined on the safety member 1. When the piston rod is pulled in, the projection member 8 is pushed in the groove 13 through the opening 2 and when the piston rod is further pulled in, the surface 14 of the safety member 1 is contacted to the projection member 8 and run and the safety member 1 is fixed to the fixed portion 6. By above constitution, even an inexpensive material with a low strength can work as the safety device surely.

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