Abstract: A vapor blast system includes a pressure pot with an upper end and a main body, a fill inlet attached to the upper end of the pressure pot, and a seal assembly disposed in the pressure pot. The seal assembly is configured to control a flow of a fluid between the pressure pot and the fill inlet. The seal assembly includes a pop-up seal, a pipe, and a spring. The pop-up seal comprises an upper surface, a lower surface disposed opposite the upper surface, a blind hole disposed in the upper surface, a bore disposed in the lower surface, and a centerline axis disposed through a center of the pop-up seal. The pipe is attached to a lower surface of the pop-up seal, wherein a portion of the pipe is received by the bore. The spring is disposed in the bore and engaged with the pipe.

Abstract: A vapor blast system includes a pressure pot with an upper end and a main body, a fill inlet attached to the upper end of the pressure pot, and a seal assembly disposed in the pressure pot. The seal assembly is configured to control a flow of a fluid between the pressure pot and the fill inlet. The seal assembly includes a pop-up seal, a pipe, and a spring. The pop-up seal comprises an upper surface, a lower surface disposed opposite the upper surface, a blind hole disposed in the upper surface, a bore disposed in the lower surface, and a centerline axis disposed through a center of the pop-up seal. The pipe is attached to a lower surface of the pop-up seal, wherein a portion of the pipe is received by the bore. The spring is disposed in the bore and engaged with the pipe.

Abstract: A vapor abrasive blast system includes a pump for pumping a water stream to a pressure vessel for pressurizing the pressure vessel to a pot pressure. A water regulator is disposed to regulate the water stream to a fixed water pressure, such that the water stream entering the pressure vessel has the fixed water pressure. The pressure vessel contains a blasting mixture, comprising an abrasive media and water, for introduction to a compressed air stream and application to a substrate. The water entering the pressure vessel has the fixed water pressure to control the pot pressure. The water regulator is configured to output the water stream such that the fixed water pressure is greater than a compressed air pressure in the compressed air stream.

Abstract: A vapor abrasive blast system includes a compressor for generating compressed air, a water pump for pumping a water stream to a pressure vessel to pressurize the pressure vessel. A control valve is disposed upstream of the pressure vessel and is configured to control the flow of water from the water pump to the pressure vessel to thereby control the flow of blast slurry downstream out of the pressure vessel.

Abstract: A blasting system includes a pressure vessel, water pump, blast circuit, motor, orifice valve, and controller. The pressure vessel is configured to contain a pressurized blast media slurry. The water pump pumps water from a water supply to the pressure vessel. The blast circuit delivers the pressurized blast media slurry received from the pressure vessel. The motor drives the water pump. The orifice valve regulates a rate of flow of the blast media slurry to the blast circuit. The controller provides control commands to the water pump or the orifice valve based on a blast media flow rate set point and at least one sensed operating parameter.

Abstract: A vapor abrasive blast system includes a pump for pumping a water stream to a pressure vessel for pressurizing the pressure vessel to a pot pressure. A water regulator is disposed to regulate the water stream to a fixed water pressure, such that the water stream entering the pressure vessel has the fixed water pressure. The pressure vessel contains a blasting mixture, comprising an abrasive media and water, for introduction to a compressed air stream and application to a substrate. The water entering the pressure vessel has the fixed water pressure to control the pot pressure. The water regulator is configured to output the water stream such that the fixed water pressure is greater than a compressed air pressure in the compressed air stream.

Abstract: A vapor abrasive blast system includes a pump for pumping a water stream to a pressure vessel for pressurizing the pressure vessel to a pot pressure. A water regulator is disposed to regulate the water stream to a fixed water pressure, such that the water stream entering the pressure vessel has the fixed water pressure. The pressure vessel contains a blasting mixture, comprising an abrasive media and water, for introduction to a compressed air stream and application to a substrate. The water entering the pressure vessel has the fixed water pressure to control the pot pressure. The water regulator is configured to output the water stream such that the fixed water pressure is greater than a compressed air pressure in the compressed air stream.

Abstract: A blasting system includes a pressure vessel, water pump, blast circuit, motor, orifice valve, and controller. The pressure vessel is configured to contain a pressurized blast media slurry. The water pump pumps water from a water supply to the pressure vessel. The blast circuit delivers the pressurized blast media slurry received from the pressure vessel. The motor drives the water pump. The orifice valve regulates a rate of flow of the blast media slurry to the blast circuit. The controller provides control commands to the water pump or the orifice valve based on a blast media flow rate set point and at least one sensed operating parameter.

Abstract: A trailer hitch assembly for attachment to a vehicle and trailer is provided with a fixed support member attached to the vehicle. A floating hitch member is attached to the trailer. Variable pressure shock absorbers interconnect the hitch and support. Rollers on the support member engage with guide tracks on the floating hitch member to control movement of the assembly.

Abstract: A protective device for a fluid-filled submersible electric motor powering a downhole pump in a well bore disposed between the motor and pump and forming a sealed assembly with the motor is described. The upper interior portion of the device is sealed to preclude the entry of well fluid and a vent near the lower end of its housing accommodates equalization of pressure between the interior of the device and the well bore with minimum contamination of the motor fluid. The protective device embodies a sealed chamber filled with motor fluid that communicates with the motor first by moving upward from a variable capacity chamber through an internal passageway and then downward through an annular passageway to the motor. An improved assembly for housing and orienting the operational parts of the device is also described.

Abstract: A compact, heavy duty trash compactor is provided for compacting trash in locations where space is limited. The compactor includes a C-shaped frame mounted on a skid. A cylindrical container is mounted on a tilt table attached to the skid such that the container is within the C-shaped frame. A telescoping ram is mounted on the frame to compact trash within the container. A foot guard is provided around the bottom of the container to prevent objects from being placed under the container when it is tilted forward.

Abstract: A pair of gripper jaws are pivotally mounted on a machine tool spindle within a central bore that opens into the toolholder socket on the outer end of the spindle. The gripper jaws have serrated outer ends that extend into the toolholder socket in position to engage a threaded opening in the inner end of a toolholder which is to be clamped in the toolholder socket. Cam surfaces on a drawbar which extends between the gripper jaws interact with cam follower surfaces on the gripper jaws to cause the gripper jaws to move radially outwardly to clamp the toolholder within the toolholder socket when the drawbar is moved axially away from the toolholder socket. The gripper jaws have axial play therein. The drawbar is spring biased axially away from the toolholder socket to clamp the toolholder in the toolholder socket and press the toolholder against the margins of the toolholder socket.

Abstract: An open head power tong for use in making-up and breaking-out joints of varying diameter such as drill pipe joints which provides for bi-directional operation with the tong housing remaining in the same position.

Abstract: A torque indicator assembly and more particularly an improved torque indicator assembly offering multiple use applications and improved long range consistency and operational characteristics.

Abstract: A tong and more particularly an open head tong of the type utilized to handle large diameter work pieces, such as drill pipe and casing for oil field applications, and including means to adjustably engage peripheral portions of such work pieces.