Abstract: A liquid nozzle in use with an interstage passage of a two stage compressor and includes a first elongated element having a first elongated surface and a second elongated element having a second elongated surface. The first and second elongated surfaces are configured for mating engagement. A channel is formed in at least one of said first or second elongated surfaces with a coolant liquid in communication therewith. A first slot is formed in said first elongated surface. The first slot and the second elongated surface define a liquid orifice communicating the channel with said interstage passage. The nozzle preferably extends across an entire width of the interstage passage.

Abstract: A seal for a fluid jet apparatus includes an assembly with a head portion and a stem portion. A body has a bore formed therein, the bore has an upstream portion of a first diameter, a downstream portion of a second diameter which is less than the first diameter and an axially extending converging portion which connects upstream and downstream portions. The stem portion has a lesser dimension that said second dimension. The stem portion is disposed within the downstream portion and the head portion is disposed within the upstream portion. The upstream portion extends for a considerable distance upstream of the head portion. A maximum cross section of the head portion is less than the first diameter and greater than the second diameter, and a surface to surface seal is formed between the head portion and the axially extending converging portion. This seal may be applied to either a nozzle or a swivel of a fluid jet assembly.

Abstract: A clutch assembly transmits rotary motion in a percussive apparatus to a drill steel. The clutch assembly includes a first hub having a first cylindrical surface formed thereon. A second hub which is substantially rotationally coupled to the drill steel, has a second cylindrical surface formed thereon. The second cylindrical surface is coaxial with the first cylindrical surface. A wrap spring engages a portion of both the first cylindrical surface and the second cylindrical surface, wherein relative rotary motion between the first hub and the second hub is permitted in a first direction and restricted in a second direction. The wrap spring clutch transmits motion supplied from a rifle bar assembly as well as a plunger bar arrangement.

Abstract: An apparatus comprising a sleeve insertable into a borehole, the borehole having a first diameter. A roof pin is inserted into the sleeve, the roof pin having a second outer diameter which is less than the first diameter. The outer surface has a peripheral dimension prior to insertion of the sleeve into the borehole. The inner or the outer surface contains at least one longitudinally extending yieldable channel portion which is of a lesser sleeve thickness than the remainder of the sleeve, permitting circumferential expansion of the sleeve. Expansion of the sleeve establishes a restraint between the roof pin and the borehole. When the sleeve is expanded within the borehole, continuous peripheral contact is made between the outer surface and the borehole.

Abstract: An apparatus comprises a support and a tower pivotally attached to the support and movable relative to said support between a raised and a lowered position. The tower is rotatable to and from a predetermined position about a longitudinal axis thereof when the tower is the raised position. A latch device is displaceable between a secured position and a non-secured position, the tower being prevented from moving to the lowered position when the tower is raised and the latch device is in the secured position. A release system prevents displacement of the latch device from the secured position when the tower is not in the predetermined and raised positions. The release system permits displacement of the latch device from the secured position when the tower is in the predetermined and raised positions. The latch device includes a plunger and a biasing member located within a latch housing. The release system includes a contact element which is connected to the plunger.

Abstract: An apparatus includes a compressor having a rotor portion, an inlet and a discharge. A motor portion of the apparatus has an intake manifold connected to the discharge. A throttle is displaceable between an open and a closed position for controlling fluid flow between the discharge and the intake manifold. A bypass return line connects the rotor portion of the compressor to the inlet. A piston valve, movable between an open location and a closed location, controls flow through the bypass return line. A control line, connecting the intake manifold to the piston valve, controls the location of the piston valve. A control valve may be included to control fluid flow through the control line. A computer, which is affected by the operation of the motor, controls the position of the control valve.

Abstract: A computer generated tool path interference check including a method of checking for interference between a workpiece and a cutting tool during the numerical control machining of the workpiece by the cutter tool. Computer simulation is utilized to determine at least a portion of the workpiece that is desired to be checked for possible interference with the path of the cutter tool. The spatial relationship between the workpiece and the cutter tool during the machining are modelled as the relative positioning of the computerized images of the portion of the workpiece and the cutter tool, respectively. The relative positioning of the computerized images of the portion of the workpiece and the cutter tool are observed to check whether an interference will occur between the workpiece and the cutter tool during the machining.

Abstract: A portable light tower apparatus includes a portable chassis having a first tubular member mounted in the chassis. A second tubular member is at least partially contained within the first tubular member so that a space is formed between the first and second tubular members. A tensioner, attached to the first tubular member, applies tension to an associated cable. A pulley is also attached to the first tubular member. A first portion of the cable is connected at one end to the second tubular member, and extends to the pulley. A second portion of the cable extends from the pulley to the tensioner. The first and second cable portions are contained within the first tubular member.

Abstract: An apparatus includes a compressor having an outlet. A U-shaped reservoir, having a substantially constant internal cross section, is in fluid communication with the outlet. The reservoir has two leg portions and a connecting portion, the compressor being located between the two leg portions wherein an overall dimension of the apparatus is reduced. This apparatus may be used for dispensing soft drinks, beer and the like. It is especially useful where the width of the compressor reservoir unit is critical.

Abstract: A method for determining a smooth machining course for a cutting tool during machining of a workpiece. Each possible cutting tool position, with respect to the workpiece, is defined by a separate reference vector. A progression of points are defined as a tool path. A first specified portion of the reference vector will follow the tool path during machining of the workpiece. A series of reference planes are generated, each plane defines a planar set of all possible reference vector positions for each point. An acceptable range from eahc set is established which defines acceptable reference vector positions within each plane for each point. A tool course is generated, which will be followed by a second portion, distant from the first portion, of the reference vector utilizing an algorithm to minimize irregularities of the course, and to contain the course entirely within the acceptable range.

Abstract: A fluid actuated percussion rock drill comprising a hollow wear sleeve and a piston slidingly disposed within the wear sleeve. Drive and return pressure surfaces bias the piston between drive and return positions, respectively. A high pressure port is included. A return chamber is exposed to the return pressure surface. A drive chamber is exposed to the drive pressure surface. A pressure sensitive valve is movable between an open and a closed position. When the valve is in the open position, the high pressure port is connected to the drive chamber. The valve includes a first valve pressure surface for exposure to the drive chamber and a second pressure surface for exposure to the high pressure port. A third valve pressure surface is exposed to an outlet pressure port. The volume of fluid travels between the high pressure port and the drive chamber when the valve is in an open position can be limited as desired for different drill applications.

Abstract: A device to determine rotational parameters of a rotatable shaft mounted within a stationary tube comprising a substantially annular shaped target. The target is attached to a rotatable shaft. A target retainer has a bore for receiving the rotatable shaft, and is dimensioned to be securely attached to an interior surface of the tube. The target retainer has a radially extending surface adjacent each axial end of the target to restrain axial movement of the target, and also has an aperture adjacent the outer periphery of the target. A sensor extends into the aperture when the sensor is mounted on the stationary tube. Fasteners connect the sensor to the stationary tube.

Abstract: An apparatus includes a tilt piston having a piston head. The piston head is reciprocally disposed within a cylindrical bore formed in a housing, the bore being oriented along an axis. A seal is mounted circumferentially about the piston head. The seal has an outer diameter that exceeds an inner diameter of the cylindrical bore. The seal extends radially in a first direction having an axial component. A support is mounted circumferentially of the piston head adjacent the seal. The support has an outer diameter less than the outer diameter of the seal. The seal is a continuous annular ring which may be of a circular or rectangular cross section. The seal and the support may be formed as a unitary member or may be two distinct elements. The support contacts the bore during a portion of travel of the piston within the bore.

Abstract: An apparatus includes a compressor for compressing fluid including a sensor capable of sensing at least one function relative to the operation of the compressor. A controller controls the compressor causing the value of said one function to be within a predetermined parameter. A computer overrides the independent response of the controller wherein the controller acts in response to the computer, the computer being separate from said controller. The computer may act as a sequencing computer or as a test computer.

Abstract: A device for separating liquid from a mixture of the liquid and a gas includes a separator tank having an interior surface. A baffle plate in the tank defines a first higher pressure space and a second relatively lower pressure space therein. The baffle plate has first, second and third edges. The first edge is sealably connected to the interior surface. The second edge has a first portion sealably connected to the interior surface and a second portion spaced from the interior surface and defining a slot therewith. The slot has a length and a width and is the only gas passage between the first and second spaces. The third edge is spaced from the interior surface. Mixture inlet means introduces the mixture into the first space. A liquid collection reservoir is provided at one end of the tank adjacent the third edge. The slot is of such a cross-sectional area that higher pressure mixture in the first space flows through the slot and is dispersed along the entire length thereof.

Abstract: A device for a bore formed in a geological structure, the bore having an outer circumferential wall. A bolt is inserted into the bore. A sleeve secures a first axial portion of the bolt to a first portion of the circumferential wall. Grout secures a second axial portion of the bolt means to a second portion of the circumferential wall; A substantially disk shaped plug limits a passage of grout to between the first axial portion of the bolt and the first portion of the circumferential wall. A retainer is included to retain a grout container in the bore prior to insertion of the bolt means into the bore.

Abstract: An apparatus for sensing rotational parameters of a shaft relative to a member, the apparatus has a bearing having an inner race with an inner diameter, the inner diameter being greater than the diameter of the shaft. An annular space is formed between the inner diameter and the shaft. A bearing seat is disposed within the space, and is fixed to the shaft. An annular encoder is affixed to the bearing seat. A sensor is located in close proximity to the annular encoder, and is fixed to the member. The bearing seat may be of either the cantilevered or split ring designs. The annular encoder is sensed by the sensor in either an axial or a radial direction.

Abstract: A bearing apparatus includes a race, the race being tubular and having first and second axial ends. One of the axial ends having a restrainer. A separator having first and second annular rims is interconnected by separator bars being annularly spaced apart. A plurality of rolling elements are retained by the separator bars and rims. A flexure member permits the separator to be radially flexed in a first radial direction for axial displacement with respect to the race and to be radially flexed in a second radial direction, opposite said first radial direction, for being restrained with respect to the race. The race may be an inner race or an outer race. A second race interrelates with the separator to lock the separator in the second radial direction. The restrainer is preferably an annular groove formed in the race.

Abstract: An apparatus to be inserted into a bore formed in a structure, includes a sleeve having an aperture. A rod is designed to be inserted into the aperture. A coupling maintains the rod substantially in axial alignment with the aperture prior to insertion of the sleeve into the bore. A recess, which is adapted to interfit with the rod, is disposed in the coupling to maintain the axial alignment. The coupling will not interfere with the insertion of the rod into the aperture. This insertion will cause the sleeve to be expanded into contact with a side of the bore.