Patents Assigned to Preventative Maintenance Systems
  • Patent number: 5490579
    Abstract: A height adjustable tanker access platform system having a fixed frame member, an access platform operatively mounted on the fixed frame member for vertical movement with respect to the fixed frame member, and a drive mechanism operatively engaged between the fixed frame member and the access platform so as to provide for raising and lowering of the access platform, is disclosed. The drive mechanism comprises a drive means securely mounted on a fixed frame member, a drive pulley operatively connected to the drive motor to permit selective driven rotation of the drive pulley about a first rotational axis, and a main idler pulley rotatably mounted on the access platform for rotation about a second rotational axis. A drive cable is securely attached at an anchored end to the fixed frame member and securely attached at an opposite remote end to a vertically moveable counterweight.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: February 13, 1996
    Assignee: Preventative Maintenance Systems
    Inventors: Ralph D. Ratcliffe, Roelof Van Der Sleen
  • Patent number: 5165574
    Abstract: A drip cup for catching fluid dripping from the end of a spout is disclosed. The drip cup clamps securely on to the end of the spout. A spring biased clamping pin passes through the wall of the cup and contacts the spout contained within the drip cup. The spout is clamped between the end of the clamping pin and the opposed part of the inner wall of the drip cup. There is a hand manipulated actuator located near the handle of the drip cup that is grasped by a person's hand in order to move the clamping pin and thereby facilitate clamping and releasing of the spout.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: November 24, 1992
    Assignee: Preventative Maintenance Systems Ltd.
    Inventor: Ralph D. Ratcliffe