Abstract: An apparatus is provided for sealing the pressure side opening of a gate ve body which includes a pair of plates and a device for joining the plates for lateral and pivotal movements with respect to one another. A device is associated with the outside edge of one of the plates for engaging the nonpressure side of the gate valve and another device is associated with the outside edge of the other plate for sealing the pressure side opening of the gate valve. Each plate has a top camming surface and a bottom camming surface with the top camming surfaces of the plates being angled toward one another and the bottom camming surfaces of the plates being angled toward one another. A device engages the top and bottom camming surfaces of the plates for laterally spreading the plates so that the sealing device can be forced into sealing engagement with the pressure side opening of the gate valve body.

Abstract: An in situ machine is provided for refurbishing a bore in a workpiece. The achine includes a shaft which is adapted to be fixed to the workpiece in axial alignment therewith. A tubular boring element is concentrically mounted for rotation about the fixed shaft and is adapted to extend into the workpiece bore. A cutting head is slidably mounted on the boring element for reciprocable movement therealong. A device is provided for rotating the boring element and cutting means, and another device, which is responsive to the rotating device, is provided for advancing the cutting head along the boring element.

Abstract: A machine is provided for in-situ grinding of tapered lugs on a hatch, such s a hatch aboard a submarine. A base is provided and a device is attached to alternate lugs of the hatch for mounting the base across the hatch opening. An elongated plate is mounted at its center to the base for pivotal movement thereon. The pivotal plate has opposite ends wherein each end is extendable between a pair of alternate lugs, one of the lugs between one of the pair of lugs being a lug to be ground. A device is mounted on the base for oscillating the pivotal plate back and forth between the lugs of each pair of alternate lugs. A grinder is provided, and a device is utilized for mounting the grinder at one end of the pivotal plate for selectively engaging the grinder with or backing the grinder away from the lug to be ground. With this arrangement a lug can be ground by oscillating the pivotal plate and engaging the grinding means with the lug.

Abstract: A portable machine is provided for in-place grinding of an inside ellipti face of an elliptical boiler manhole access with a grinder which has a flat grinding surface. The boiler manhole access also has an outside elliptical face and a conforming elliptical edge therebetween. The machine includes a supporting structure which is adapted to be fixedly mounted in the manhole access and span the elliptical inside edge. A spindle is rotatably mounted on the support structure with its longitudinal axis substantially coextensive with the longitudinal axis of the manhole access. A sleeve is fixedly mounted to one end of the spindle in a direction perpendicular thereto, and an elongated hollow slide means is slidably mounted on the sleeve. The slide and the sleeve are in gas communication with one another so that when gas pressure is applied thereto the slide is outwardly spring biased from the spindle. The grinder is mounted to the slide with the grinding surface engageable with the inside elliptical face.

Abstract: An apparatus for in-place grinding of the inner surface of huge cylinders mprises two adjustable spider ring assemblies which support a rotating rail assembly. A cage assembly is mounted on and rotates with the rail assembly and carries a grinding unit for grinding the inner surface of the cylinder.

Abstract: A turning apparatus, intended to be mounted on a work shaft for in-place ting, may include a pair of mounting rings which are attachable to the shaft and which support a longitudinal annulate frame assembly which rotates about the area to be cut. A drive assembly is mounted on a mounting ring and engages a ring gear attached to the frame assembly for providing it rotational force. A longitudinal track assembly is mounted on and extends between the ends of the frame assembly. A carriage assembly is slidably mounted on the track assembly and is in operational engagement with a lead screw which is also mounted on the track assembly. The carriage assembly is adapted to hold a cutter for machining the shaft surface as the frame assembly rotates. A hydraulic indexing device incrementally rotates the lead screw in synchronism with the rotation of the frame assembly to move the carriage assembly and the cutter along the axis of the work piece.

Abstract: A vertical drive mechanism is provided for a cutting apparatus. The cutting pparatus can be used for in place machining of a valve seat which may include an annular turntable adapted to be rotatably mounted on the valve above the valve seat. A feed shaft is mounted through the turntable so as to be rotatable therewith, and a bottom of the feed shaft is adapted to receive a cutter for machining the valve seat. The vertical drive mechanism is mounted on the feed shaft and includes a nut threaded on the feed shaft and a gear combination. The gear combination may include a first portion which is fixedly connected to the nut, a second portion which operatively engages the first gear portion, and a third portion which operatively engages the second gear portion, the third gear portion being mounted for rotatable slidable friction engagement about the nut.

Abstract: A cutting apparatus with a vertical drive mechanism for in place machining f a valve seat which may include an annular turntable adapted to be rotatably mounted on the valve above the valve seat. A feed shaft is mounted through the turntable so as to be rotatable therewith, and a bottom of the feed shaft is adapted to receive a cutter for machining the valve seat. The vertical drive mechanism is mounted on the feed shaft and includes a nut threaded in the feed shaft and a gear combination. The gear combination may include a first portion which is fixedly connected to the nut, a second portion which operatively engages the first gear portion, and a third portion which operatively engages the second gear portion, the third gear portion being mounted for rotatable slidable friction engagement about the nut.