Abstract: A multi passage swivel assembly provides fluid or gas flow while continuous or intermittent rotation occurs between a fixed inlet port and a rotating outlet port. The assembly contains a clearance control ring that compensates for dimensional change to allow high pressure operation.

Abstract: A gauge for measuring the distance and angle between two pipes is disclosed. The gauge consists of an elongated tubular body section adapted to be rigidly affixed to one of the pipes and including an extendable probe. A target plate is fitted over the other pipe and the extendable probe is brought into contact with the target plate. The angle between the target and the extendable probe, the eccentricity of the extendable probe and the target plate and the length of the combination of the tubular body and the extendable probe gives sufficient dimensions for cutting a curved section of pipe or pup.

Abstract: Coordinated control of engine speed, transmission drive ratio and drive direction is provided for with a single foot pedal and a compact economical linkage arrangement for coupling the pedal to a vehicle engine and hydrostatic transmission. Forward rocking of the pedal from a neutral position progressively increases transmission drive ratio in the forward direction while backward rocking of the pedal from the neutral position progressively increases the drive ratio in the reverse direction. The pedal linkage further produces a unidirectional progressive motion of the engine speed control upon being rocked in either the forward or backward direction and this engine speed control motion may be continued by additional pedal movement after the transmission control member has reached the maximum possible movement in either direction.