Abstract: This is a system of providing lateral support to the block of a Scotch Yoke mechanism. The Scotch Yoke mechanism is useful in operators or devices which translate linear motion to rotary motion. The Scotch Yoke has a hub with an upper U-shaped member having two arms and a lower U-shaped member also having two arms. The hub is connected to a rod so that rotation of the hub rotates the rod. A drive screw or rod is between the upper and lower U-shaped arms and is provided with a block which has upper and lower rollers for engaging the Scotch Yoke assembly which is mounted in a housing. This whole mechanism may be called an operator. A new and improved way is provided for transmitting applied force which is imposed on the block to the housing proper.

Abstract: A grease fitting cap having a housing or body which is attachable to the head portion of a button-head grease fitting. A bolt member is threadably carried by the housing and is provided with an annular sealing member which may be tightened against the button-head portion and surrounding the port thereof, thereby sealing the port against leakage and contamination.