Abstract: A hub joint assembly for frictionally connecting a shaft to a connector includes a coupling hub including a collar portion and a flange portion. The collar portion includes a bore having an inner surface that is configured to be positioned adjacent to the outer surface of the shaft. The collar portion further includes an outer surface that may be conical. The flange portion extends from the collar portion and is configured to be coupled with the connector. The hub joint assembly further includes a clamp ring including a bore having an inner surface. The inner surface may be conical and configured to mate with the outer surface of the coupling hub. A passage is defined in the clamp ring and extends from an outer surface of the clamp ring to the inner surface of the clamp ring.

Abstract: A compressor for a heating, ventilating, air conditioning, and refrigeration (HVAC&R) unit includes an impeller, a shaft configured to rotate the impeller, and a fastener. The impeller includes an opening and does not include keys, splines, pins, or any combination thereof. The fastener is coupled to an end of the shaft and extends through the opening of the impeller, and the fastener is configured to stretch in an axial direction relative to the shaft via a tensioner during assembly of the compressor.

Abstract: Provided is a rotary machine including a rotating resinous impeller, a rotary shaft penetrating the impeller, and a fastening portion screwed to the rotary shaft, in which the rotary shaft includes a penetrating shaft portion facing an inner peripheral surface of the impeller, a tip shaft portion screwed to the fastening portion, and a fastening reception portion sandwiching the impeller between the fastening reception portion and the fastening portion, the penetrating shaft portion has a non-circular portion and an outline of a cross section of the non-circular portion orthogonal to a rotational axis deviates from a perfect circle about the rotational axis, and the impeller includes a connecting portion engaging with the non-circular portion.

Abstract: An assembly can include a shaft that includes threads and a free end that includes a shaft drive feature; a compressor wheel that includes a compressor wheel drive feature and a through bore that receives the shaft; and a nut that includes threads that mate the threads of the shaft.

Abstract: An axle assembly for a work vehicle may generally include a hub, a casing at least partially received within the hub, and a shaft configured to be received within the casing. The hub defines a tapered inner surface and the casing defines a tapered outer surface. The tapered inner surface of the hub defines a first keyway portion defining a first keyway surface, and the tapered outer surface of the casing defines a second keyway portion defining a second keyway surface. The tapered surfaces of the hub and the casing together define a tapered interface and a keyway. The first and second keyway surfaces of the keyway extend in a direction non-parallel to the tapered interface.

Abstract: An apparatus and method for releasably mounting access control components for a door lock to a door. A base element is adapted to be mounted to the door. A first wire connector element is mounted to the base element. A mounting element with combustible material attached is provided. A second wire connector element is mounted to the mounting element, and the second wire connector element is releasably connected to the first wire connector element to mount the mounting element to the base element. A spring is provided, and a retainer holds the spring in a loaded state, but in a fire event the retainer may melt, allowing the spring to apply force to the mounting element. Alternatively, an expanding material may apply the force. The force causes the wire connector elements to disconnect and allow the mounting element to separate from the base element.

Abstract: A de-coupling mechanism includes a link slidably received in a link aperture of a bracket. A pin is slidably received in a pin bore of the link and a receiving bore of the bracket. A first block is connected to the bracket and includes an initiator receiving passage in communication with the pin bore. An initiator is positioned in the initiator receiving passage and retained against a connecting passage edge and oppositely contacts an end face of a cap connected to the first block. A second block connected to the bracket includes a longitudinal channel having a channel diameter larger than a pin diameter so the pin is freely displaceable into the longitudinal channel. An end face of a retaining cap is connected to a second block end wall. The retaining cap includes a stepped portion having a step diameter smaller than the channel diameter and the pin diameter.

Abstract: A tapered coupling structure allows a tapered shaft to be coupled to and decoupled from a hub without the use of an 0-ring. The tapered shaft is provided with a taper part on the side that is coupled to the hub, and the hub is provided with a high-rigidity part having a thickness in the radial direction larger than that of other regions and having a high rigidity in the radial direction. An oil groove formed in the outer peripheral surface of the taper part to feed oil to the coupling surfaces of the taper part and the hub is provided in a region corresponding to the high-rigidity part in the axial direction.

Abstract: An axial loaded explosive bolt that can repeatedly be used for the purpose of remotely or automatically activating a timely separation of adjoining walls separated by a finite distance by the means of either an explosive charge or activation of a pressurized gas line. The fastener includes two bolts with internal bores that are attached by the means of a two-piece encapsulation connected by an inter-connecting clasp. The fastener assembly employs the use of either a combination of a thermal igniter and a pyrotechnic charge or a pressurized gas line attached to a solenoid valve and pressurized gas storage unit to supply a force sufficient to properly separate the said mechanical fastener assembly.

Abstract: A method of installing an axially adjustable driveshaft assembly in a drive train system is described. Two hollow driveshaft sections, where one has a valve through an aperture in it and each has an end fitting, engage each other to form an axially adjustable driveshaft assembly that has a sealed internal chamber within. When a pressurized air or vacuum source is connected to the valve, air fills the chamber or air is removed from the chamber, which correspondingly increases or decreases a drive train system length. This results in facilitating the installation of the driveshaft assembly between a transmission and an axle assembly in a drive train system.

Abstract: An axial loaded explosive bolt that can repeatedly be used for the purpose of remotely or automatically activating a timely separation of adjoining walls separated by a finite distance by the means of either an explosive charge or activation of a pressurized gas line. The fastener includes two bolts with internal bores that are attached by the means of a two-piece encapsulation connected by an inter-connecting clasp. The fastener assembly employs the use of either a combination of a thermal igniter and a pyrotechnic charge or a pressurized gas line attached to a solenoid valve and pressurized gas storage unit to supply a force sufficient to properly separate the said mechanical fastener assembly.

Abstract: A safety coupling apparatus which includes first and second annular coupling parts for attachment to first and second coaxial rotatable shafts. The second coupling part defines an axial chamber which has an open end facing the first coupling part, and a radially-extending recess between a collar and a flange, both extending and located radially outwardly of the axial chamber, wherein the flange is spaced from the collar. An expandable hollow body of the first coupling part axially extends through the open end and into the axial chamber. A cavity subdivides the hollow body into inner and outer cylindrical sections and can (1) be filled with, or (2) emptied of pressurized fluid to expand or contract the inner and outer sections relative to one another and cause or prevent external surfaces thereof to contact adjacent surfaces of the axial chamber and thereby prevent or enable relative rotation of the first and second coupling parts.

Abstract: A shrink disc unit including a rotating body with a peripheral outer surface and a hub surrounding the rotating body with a peripheral inner surface. The peripheral inner surface and the peripheral outer surface form a separating line between the rotating body and the hub at an angle to a rotational axis of the rotating body. A fluid channel leads through the rotating body or the hub for pressurization of the separating line with a pressure fluid. A fixing device, formed from one of the rotating body or the hub, alone or in combination with the other, may be used to fix a tool for the assembly or disassembly of the hub at a given angular position on the rotating body and/or the hub.

Abstract: Provided are a structure for connecting end parts capable of, with simple equipment, reducing vibration, isolating electrical noise, and obtaining a degree of freedom for an installation position, and a vacuum system using the structure. A flange salient (202) has a recess (206) opening upwardly with a rectangle cross section and formed annularly around an inlet port (101). An O-ring (207) is provided within the recess (206). The O-ring (207) upwardly protrudes from the recess (206). Through holes (209) through which bolts (205) are penetrated are formed annularly in a plurality of places around a pump flange (201). Cylindrical elastic members (211) made of rubber are provided in the through holes (209). Further, inserted into each cylindrical elastic member (211) is a spacer collar (213) having a body (213a) in a cylindrical shape and a discal brim (213b).

Abstract: A shrink disc unit comprising: a rotating body with a peripheral outer surface; a hub, surrounding the rotating body with a peripheral inner surface, which together with the peripheral outer surface form a separating line between the rotating body and the hub at an angle to a rotational axis of the rotating body in the longitudinal section of the shrink disc unit, whereby the hub may be shrunk onto the rotating body along the separating line, or is shrunk over the separating line; a fluid channel, leading through the rotating body or the hub, for pressurisation of the separating line with a pressure fluid; and a fixing device, formed from one of the rotating body or the hub, alone or in combination with the other and by means of which a tool for the assembly or disassembly of the hub may be either supported on the rotating body or the hub and which may be fixed at a given angular position on the rotating body and/or the hub.

Abstract: A hinge assembly which can be inserted into the bore of an end-bored bluster, fastened to the inside of the bore, and pivotally attached to a flange suitable for attachment to a rail. The hinge assembly requires no external modification to the normally exposed surfaces of the baluster. The flange includes an H-shaped foot which may be concealed in a groove defined by a hand rail or a shoe rail. The pivot point is raised slightly above the inner surface of the groove to prevent any unsightly gap, termed “bird's' mouth” in the industry, adjacent the baluster.

Abstract: A method and system for helping a user perform tasks in software. Graphic elements (e.g., icons) are rendered and displayed regardless of which task is being performed. An element can be either active or inactive; user selection of an element with the element active initiates an action in response to the selection while user selection of the element with the element inactive will not initiate the action. Some elements are activated and other elements are deactivated according to which task is to be performed. The elements are selectively activated and deactivated to guide the user through the tasks according to the order in which the tasks are logically performed. The elements thus suggest an order for performing the tasks, guiding the user through the tasks without the need for a help utility such as a wizard.

Abstract: An apparatus, transfer cask, system, and method for defueling a nuclear reactor and transferring spent nuclear fuel from a spent nuclear fuel to a storage cask for long terms storage. In one aspect, the invention is an apparatus for use in transferring a canister of spent nuclear fuel from a transfer cask to a storage cask, the apparatus comprising a radiation absorbing shield surrounding a portion of a hole through which the canister can pass; means for securing the apparatus to the top surface of the storage cask; means for securing the bottom surface of the transfer cask to the apparatus; wherein the transfer cask securing means and the storage cask securing means are positioned on the apparatus so that when the apparatus is secured to both the transfer cask and the storage cask, the cavity of the transfer cask, the hole, and the cavity of the storage cask are substantially aligned; and means for moving the bottom lid in a horizontal direction once the bottom lid is unfastened from the bottom surface.

Abstract: An improved hydraulic cylinder construction having a feature thereon facilitating operative connection with a service kit to enable a quick and injury free removal thereof from a location whereat the hydraulic cylinder is spring biased in a shock absorber installation, particularly for use in a scraper blade mounting assembly.

Abstract: A hydraulic chuck includes a center bore for receiving a tool shank. At least one closed cavity is disposed in the chuck body adjacent the bore and extend circumferentially by a distance less than 360 degrees. The cavity containing device communicates with the medium for pressurizing the medium to radially deform and expand the bore wall from a normal diameter to a larger diameter to enable the tool shank to be moved into or from the bore. A depressurizing of the medium causes the bore wall to radially retract to the normal diameter for clamping the member in the bore.

Abstract: A coupling device with two coupling members, which are to be connected coaxially together, and a tension rod, which penetrates the first coupling member and is to be coupled with the second coupling member. To minimize the effect of the cross forces on the positioning of the second coupling member, it is provided that the end, facing the head of the tension rod, penetrates into a passage borehole of the second coupling member with a radial clearance; and a connector, resting against a shoulder of the second coupling member, can be attached to the end, thus resulting in radial clearance between connector and second coupling member. Furthermore, a connector is described whose periphery has a contour, which prevents a turning action inside the coupling member, whereby the connector can also be moved in the coupling member and exhibits an axial contact surface, which is adequately small to enable a swivelling motion without generating a counteracting moment of flexion.

Abstract: A changing device for shaft and hub connections, comprising a shaft end, a hub part surrounding the shaft end, and a conical clamping bushing disposed therebetween. There is also provided a mechanism for retaining the clamping bushing on the end of the shaft in a way so that it cannot be lost, and at the same time serves to initiate biaxial displacement of the clamping bushing in relation to the end of the shaft. This permits assembling and dismantling of the hub part, whereby all other parts of the shaft and hub connection can remain mounted on the end of the shaft. This leads to particularly short tool changing times.

Abstract: An arrangement for the rotationally fixed connection of a hydrodynamic coupling device to a drive component, in particular a drive shaft, has a first torque-transmission engagement formation, which is connected in a rotationally fixed manner to the drive component, a second torque-transmission engagement formation, which is connected in a rotationally fixed manner to the hydrodynamic coupling device and is in or can be brought into torque-transmitting engagement with the first torque-transmission engagement formation as a result of these formations being moved toward one another substantially in the direction of an axis of rotation, and a preloading device which preloads the hydrodynamic coupling device with respect to the drive component substantially in the direction of the axis of rotation. The first and second torque-transmission engagement formations are brought into or held in torque-transmitting engagement with one another by the preloading force generated by the preloading device.

Abstract: An assembly for connecting a measuring tool to a measuring head moved by a measuring robot and having an output member rotating at least about one axis; the assembly having three supports located peripherally with respect to the axis and defining an isostatic constraint between the output member and a connecting portion for connecting the tool to the head; the assembly having releasable locking means interposed between the connecting portion of the tool and the output member; and the releasable locking means having engaging means located substantially along the axis, and a pneumatic actuating member cooperating with and for controlling release of the engaging means.

Abstract: A connection between the spindle head of a gear-type or universal joint spindle and the neck of a roll includes wear plates are placed between locating surfaces on the spindle head and on the roll neck so as to primarily produce a positive engagement. The spindle head is provided with a clamping device for applying pressure to the wear plates and for clamping the spindle head on the roll neck for constructing the positively engaging connection as a play-free connection.

Abstract: A first shaft provided with a flange having a through bore is coupled to a second shaft provided with a flange having a blind bore aligned with the through bore in the flange of the first shaft using a coupling device including an adapting bolt having an external tapered surface and an axial hole open at the narrower end of the adapting bolt and a cylindrical sleeve element having an internal tapered surface corresponding to the external tapered surface of the adapting bolt, the adapting bolt being within the sleeve element. The coupling device is fitted in the aligned bores so that the narrower end of the adapting bolt is toward the flange of the first shaft and an end surface of the sleeve element is exposed. A tool is fitted in the axial hole in the adapting bolt and a force is applied to the tool tending to displace the adapting bolt relative to the sleeve element in the direction from the wider end of the adapting bolt toward the narrower end thereof.

Abstract: An overload protector is provided which is secured to a robot arm and a tool to protect the tool form being overloaded or forced into an abnormal position. A rocker assembly is located within the cavity in the protector and the cavity is pressurized in order to force a wall of the rocker assembly into a sealing relationship with a wall of the cavity. The rocker assembly has a peripheral wall in which a number of semi-conical detents are formed in the wall of the cavity. The detents are accommodated in the recesses when the rocker assembly is in a sealing relationship with the cavity wall. When the tool is overloaded or forced into an abnormal position the rocker assembly rocks in the cavity with resulting leakage of fluid from the cavity and a drop of pressure. A pressure switch detects that drop and signals the robot to stop.

Abstract: A cutterhead, particularly for wood lathe tooling includes one or more sleeves each of which has an inner hydraulically operated circumferential gripper for securement to a rotatable arbor, and an outer, independently hydraulically operated circumferential gripper for securement to a cylinder. The outer peripheral surface of the cylinder is provided with longitudinal dovetail ribs. Knife carriers and space-filling limiters slide axially onto these ribs and are locked in place by set screws. Each carrier has a slot for radially receiving a knife to be gripped between a wedge and a corrugated keeper. The keeper and carrier slot are keyed together to provide for radial adjustment of the knife. A threaded pin restrains slot spreading and radially retains the wedge and keeper. Wedge action prevents radial throwing of elements should someone neglect to secure the carriers or limiters, or neglect to elevate the wedges.

Abstract: A tensioning assembly having a cylindrical exterior circumferential surface of a drivable shaft section and an interior cone ring having a cylindrical interior circumferential surface arranged on the cylindrical exterior circumferential surface, the interior cone ring having a conical exterior circumferential surface. An exterior cone ring is arranged on the conical exterior circumferential surface of the interior cone ring, the exterior cone ring having tensioning screws which are coaxial with respect to the drivable shaft section and by which the interior and exterior cone rings are tensioned with one another and the interior cone ring is tensioned with the drivable shaft section.

Abstract: A hydraulic clamping device for axially clamping pieces of radial symmetry has a base body with a longitudinal axis slipped onto a receiving mandrel. An annular piston is floatingly arranged in the base body. A closed circuit hydraulic system for displacing the annular piston relative to the base body toward a piece of radial symmetry to be clamped on the receiving mandrel is provided for securely clamping the piece of radial symmetry on the receiving mandrel. A plurality of compensation wedges arranged at the annular piston have wedge surfaces extending symmetrically to the longitudinal axis of the base body. Adjusting screws that are radially displaceable relative to the longitudinal center axis of the base body are provided for displacing the compensation wedges axially in order to secure the compensation wedges in a clamping position.

Abstract: A fluid-powered, laterally tiltable quick disconnect bucket actuator. An actuator has a generally cylindrical body with an output shaft rotatably disposed therein with an axis in general parallel alignment with a forward rotation plane through which the bucket is rotatable on a backhoe arm by the operation of a rotation link. A bracket is attached to the body and has a pair of clevises for pivotal attachment to the vehicle arm and rotation link. In one embodiment, the shaft has two pair of attachment forks for attaching the shaft to corresponding clevises of a bucket. One pair of the forks is attached to and moves axially with a member which is selectively extendable relative to the shaft to move the pair of forks between a locking position holding the bucket and a release position allowing disconnection of the bucket.

Abstract: A friction clamping apparatus includes: a rod; a plurality of friction clamping units serially connected in the axial direction of the rod, each of the friction clamping units including a radially elastically transformable sleeve and a ram into which the sleeve is fittingly inserted, the rod being fittingly inserted through the respective sleeves of the friction clamping units; and restraint pressure chambers defined by an inner circumferential surfaces of the ram and outer circumferential surfaces of the sleeve respectively, so that an oil pressure is made to act upon the restraint pressure chambers to restrain the rod with the sleeves or the oil pressure is made so as not to act upon the restraint pressure chambers to release the rod from the sleeves.

Abstract: The invention concerns a coupling for the detachable connection of two components, preferably a shaft with a hub, which for transmission of a torque are rotatably connected with each other by form-fit. When using such plug or form fit connections such as between a roll journal and a coupling box in a rolling mill, large tolerances must be expected that express themselves in peripheral directions and have adverse effects on the surface integrity of the rolled material. The invention provides for a clamping element which preferably can be inserted in the hub, acted upon by hydraulic fluid to keep the shaft in place relative to the hub. The clamping element is of a two-part design and can be filled with hydraulic fluid through appropriate devices, so that the hub is tightly fastened on the shaft upon assembly. For removal of the hub from the shaft, the pressure in the clamping element is simply relieved.

Abstract: An aviator harness fitting includes a releasable member secured to a buckle member by means of a movable bolt. A pressure inlet is provided to enable translational motion of the bolt in the manner of a piston. When actuated, the bolt moves to a release position to permit separation of the releasable and buckle members.

Abstract: The invention concerns a coupling with a hub, for transmitting a torque to a shaft, with a cylindrical annular chamber arranged in the hub at a slight spacing from the shaft. The annular chamber can be pressurized with an hydraulically actuated servo valve arranged in the hydraulic fluid channel connecting to said annular chamber. A separate hydraulic fluid channel serves to actuate the servo valve. As control pressure is admitted to this second hydraulic fluid channel, the servo valve opens and establishes the connection between the first hydraulic fluid channel and the annular chamber for admission of a high-pressure medium. The advance of the connecting nipples onto the hub may be effected by remote actuation, thus enabling an automatic roll change, for instance in a rolling mill, without difficult and time-consuming manual assembly in congested space conditions.

Abstract: A friction clamping apparatus includes: a rod; a plurality of friction clamping units serially connected in the axial direction of the rod, each of the friction clamping units including a radially elastically transformable sleeve and a ram into which the sleeve is fittingly inserted, the rod being fittingly inserted through the respective sleeves of the friction clamping units; and restraint pressure chambers defined by an inner circumferential surfaces of the ram and outer circumferential surfaces of the sleeve respectively, so that an oil pressure is made to act upon the restraint pressure chambers to restrain the rod with the sleeves or the oil pressure is made so as not to act upon the restraint pressure chambers to release the rod from the sleeves.

Abstract: The invention relates to a frictional resistance coupling for transmitting torque between two coaxial components, for example a shaft with an articulated shaft, the coupling comprises an outer part and an inner part, which enclose an inner chamber with a conical wall. Inserted to move axially in the inner chamber is an annular piston of the same conicity, so that when the annular piston moves axially by means of a pressure medium, a radial clamping force and thus frictional resistance for transmitting torque is produced. The pressure chambers located on both sides of the annular piston in each case comprise a further connection to a low pressure source. The pressure chamber respectively not supplied with high pressure is supplied with pressure medium from a low pressure source during the displacement process and when the piston reaches the end position within the inner chamber, the opening of the low pressure passage is closed by the end face of the piston.

Abstract: A frictional resistance coupling comprises an outer part and an inner part, which are connected to each other in a pressure-tight manner and between them form an inner chamber with a conical surface and a likewise conical, axially displaceable annular piston. The annular piston is moved axially due to the supply of pressure medium, for producing a radial tension and frictional resistance between two parts, e.g., a coupling and a shaft. Serving for determining the axial position of the enclosed annular piston is an axially disposed transmitter cylinder, which is connected to a receiver cylinder in the region of the outer surface of the coupling, by way of an incompressible medium. The piston of the receiver cylinder supports an indicator, whereof the position is monitored by an external sensor.

Abstract: A fluid-powered, laterally tiltable quick disconnect bucket actuator. A bucket has a pair of bucket clevises, and an actuator has a generally cylindrical body with an output shaft rotatably disposed therein with an axis in general parallel alignment with a forward rotation plane through which the bucket is rotatable on a backhoe arm by the operation of a rotation link. A bracket is attached to the body and has a pair of clevises for pivotal attachment to the vehicle arm and rotation link. The output shaft has a pair of shaft attachmetn forks for each end for attaching the shaft to the corresponding bucket clevises. The one pair of shaft attachment forks is attached to and moves axially with a member which is selectively extendable relative to the shaft to move the pair of forks between a locking position holding the bucket and a release position allowing disconnection of the bucket.

Abstract: A pressurized drive coupling includes a socket joined to an end of one shaft in a drive system and a stem extending from an end of another shaft. The stem is insertable into a cavity formed in the socket and the stem and cavity have mating noncircular transverse cross-sections. A sleeve is seated around the socket. The sleeve includes a rigid outer section and a deformable inner section which is in contact with the socket. A pressure chamber is formed between the sections of the sleeve and the pressure chamber is filled with a suitable fluid which is pressurized to reduce the dimensions of the cavity and eliminate clearance between the stem and cavity.

Abstract: A hydraulic clamping device for the axial clamping of bodies of rotation, especially tools, onto a revolving mandrel is provided. It has a base body fixed to a mandrel and a rotary piston which is suspended in a floating manner inside the base body and is axially slidable relative to the base body via a closed-circuit hydraulic system and setscrews. The tool is tightly clamped in an axial direction. In order to improve the axial rigidity of the hydraulic clamping device, to provide a fast and directed adjustment of the concentricity during the clamping of the tool inside the device and to provide a radial freedom of play during operation, a sleeve fastened to the mandrel is provided to which the base body is attached. The sleeve is equipped with an elastic flange, a first face of which is engaged by the rotary piston and a second face of which is abuttable against said tool.

Abstract: A hydraulically expandable hub having a collection groove and a vent port to prevent the leakage of oil upon the shaft to which the hub is mounted and a method for using such a hub is disclosed. The oil collection groove is located along the inside diameter of the hub between each end of the hub and the oil groove also located on the inside diameter of the hub. A vent port is connected to the collection groove so a vacuum source can be coupled to the hub. The negative pressure produced by the vacuum source at the collection groove sweeps or pulls oil seepage from the oil groove into the collection groove which is transported to the hub exterior through the vent port. Such a hub can be altered in position about the shaft without leaving oil residue along the shaft.

Abstract: A torque-limiting clutch arrangement which comprises a cylindrical part (3) forming part of one clutch element and having shrink-fitted thereon a cylindrical sleeve (5) which forms part of the other clutch element. The clutch arrangement also includes a pump which when one clutch element (3) rotates relative to the other clutch element (5), when the torque on the clutch exceeds a given value, functions to pump oil into the domain of engagement between the cylindrical part (3) and the sleeve (5), so as to form a hydrostatic layer therebetween, the hydrostatic layer essentially negating the friction between the engagement surfaces while the relative movement continues.

Abstract: The invention relates to an apparatus for coupling a shaft or a hub by means of a radially resilient bush, which can be radially clamped to the shaft or hub by axially tightenable clamping elements by exposing the clamping elements to a radially operative spring assembly; the release of the coupling is effected by means of a hydraulically- or pneumatically-actuated cylinder and piston arrangement. The nucleus of the invention is that the spring assembly is accommodated in the cylinder chamber acted upon by the pressure fluid.

Abstract: A locking device suitable for use in a gun to prevent unauthorized use of the gun includes a key operated lock (3) operable to expand a ring (8) into locking engagement with the gun chamber. In order to prevent removal of the device by applying force to the muzzle end of the device locking pins (14) are mounted in radial bores (11) to be driven radially outwardly by a tapered piston (18) if the piston is driven away from the muzzle end. An explosvie cartridge (23) is detonated by a firing pin (25) if force is applied to an end plate (26) thereby driving the piston in the desired manner.

Abstract: A hydraulic fastener for mounting bearing assemblies on the end of a roll in a rolling mill stand. The fastener includes a hydraulic ring cylinder component having a front face directed toward a roll and an inner cylindrical surface adapted to fit onto a reduced diameter end section of the roll. A chamber extends about the circumference of the cylinder component and is open at the front face. A hydraulic ring piston component is slidably received in this chamber and has an inner face. A retaining ring is threadedly mounted in the cylinder component to hold at least a substantial portion of the piston in the chamber. Passageways are provided in the cylinder component for injecting grease into the chamber and into a space formed between the inner face of the piston and an opposing face of the chamber. A split ring is secured on the end section of the roll to retain the cylinder component in place.

Abstract: A stem is fixed to a head tube of a bicycle by a fixing device. The stem has an aperture formed in a center. A hole is formed in an upper end of the vertical tube for receiving a spring and a bolt. Two holes are laterally and oppositely formed in a lower portion of the stem, and each receives a piston. The aperture and the holes are filled with oil. The pistons are pushed to engage with an inner surface of the head tube when the bolt is threaded into the upper hole so that the stem can be firmly fixed to the head tube.

Abstract: A hydraulically actuatable shrinking disc, especially for a force transmitting connection of a hub having a cylindrical outer surface with a shaft comprises an inner ring arranged to be located on a cylindrical outer surface of a hub and having a double-conical outer peripheral surface, two pressure rings which are arranged axially opposite to one another in a displaceable and clampable manner on the inner ring and have inner conical surfaces which corresponds to the outer peripheral surface of the inner ring, the pressure rings forming therebetween a pressure chamber for a pressure fluid, the pressure rings being mirror-symmetrical in their cross-section and each formed with a cylindrical outer peripheral surface, the pressure rings being provided with openings which serve as pressure medium passages, a clamping ring which serves as an abutment for the pressure rings and surrounds the latter, the clamping ring having an outer peripheral surface which is provided with a connecting opening for the pressure flu

Abstract: A quick change tool holder including two basic component assemblies, the first component assembly having a central boss portion and the second component assembly having a recess to receive the boss portion when the two component assemblies are attached together. A channel formed in the boss portion is engaged by a pivotally mounted lock bar member when the component assemblies are attached together. The lock bar is moved out of the channel which permits separation of one component assembly from the other by the action of air pressure against a piston.

Abstract: A frictional joint between a first member and a second member is dismantled by means of a hydraulic nut fitted onto an external screw thread of the first member. The hydraulic nut acts on a separation ring having an external screw thread engaged with an internal screw thread in a co-axial recess provided in the second member.