Abstract: The moulding tool has an annular die providing a moulding cavity, an inner ring abutting against the die outer peripheral surface and an outer ring abutting against the inner ring outer peripheral surface. The inner ring is made of a material having a higher modulus of elasticity than the material from which the outer ring and die are made. Advantageously the inner ring is made of a carbide metal and the die and outer ring of steel and in the above described relationship to reduce the danger of fracture of the die.

Abstract: An archery bow rest shelf portion amounts brackets having upper and lower horizontal arms that respectively mount an arrow holder and an arm rest device for pivotal movement between generally vertical extending positions for engaging opposite sides of the arrow shaft to aid in retaining the arrow in an emplacement position and stabilizing an arrow as it is being propelled by the bow string. The swing arm is generally of a frusto-sector shape with its forward base corner portion pivotally mounted on the lower leg between the vertical position extending above the first leg to a datum position having its arrow supporting, arcuately curved surface forwardly of its vertical position and extending to a lower elevation.

Abstract: The refrigeration or heat pump installation includes a liquid separator that has a vapor chamber having a port connected to the outlet of the evaporator and an outlet connected through a suction conduit to a compressor. The separator also has an intermediate chamber beneath the vapor chamber for receiving liquid from the vapor chamber by the way of a first switching valve, the intermediate chamber being connected to the inlet of the evaporator for the purpose of recirculating liquid. A second switching valve forms part of the expansion apparatus for controlling the flow of fluid either directly to the intermediate chamber or through the first switching valve to the intermediate chamber. The two switching valves are operated to open and closed conditions in the opposite sense for controlling and almost continuous pulsating recirculation of liquid through the evaporator. The expansion apparatus is connected through a condenser to the outlet of the compressor.

Abstract: Disclosed is a valve that is particularly useful in a pressure atomizing nozzle of a heating installation and includes a valve housing in which there is a valve seat with an adjoining valve chamber and a flow passage that opens to a housing outlet. In the valve chamber there is provided a spring for resiliently urging the closure member to seat on the valve seat. The valve chamber has a guide section adjacent the valve seat that is of a transverse cross section corresponding to a transverse cross section of the closure member while the housing and closure member provide a free flow passage to the outlet when the closure member is moved axially away from the valve seat at least a preselected axial distance. The valve is of a construction that ensures that fluid can flow through the valve only after a particular desire pressure has been reached, but immediately after the conveying pressure drops below a predetermined value, fluid can no longer reach the housing outlet.

Abstract: There is provided control apparatus for controlling fluid flow between a bidirectional motor, a pump and a container, and includes a control valve that has a slide operative between neutral and first and second operative positions. A compensating valve is provided in the supply conduit that holds the upstream pressure drop at the control valve substantially constant and is controlled by load pressure sensing circuitry. The load pressure circuitry includes two branches that are connected through a change over valve to the compensating valve. There is provided an over pressure valve and a throttle point in each branch, each branch being connected to a load pressure sensing orifice of the control valve housing and fluidly connected through the slide to one of the housing motor orifices, the one depending upon whether the slide is in its first or in its second position.

Abstract: This invention relates to an introducer slitter for slitting an introducer tube portion having, for example, a catheter extending therethrough and into a body vessel while the introducer tube is moved rearwardly relative to the catheter to facilitate separating the introducer from the catheter without having to slide the introducer tube portion over the proximal end of the catheter. The slitter includes an arcuate section having an inner peripheral wall that extends arcuately through an angle of at least about 180.degree. and is adapted to abut against the catheter, and a nose portion that extends between the catheter and introducer tube portions as the introducer is moved axially rearwardly relative to the catheter, a handle section extending radially outwardly of the arcuate section and a radially extending cutting edge for engaging the introducer tube portion for slitting the introducer tube portion as the introducer is pulled rearwardly relative to the slitter.

Abstract: A water outlet fitting has a housing that includes first and second housing portions with a water outlet passage opening to the water inlet passage at an angle with a sound damper insert extended into part of the outlet passage in the first housing portion. The insert includes a sealing member removable clamped between the housing portions and is connected through a filter to a base located in the closed terminal end portion of the outlet passage axially opposite the opening of the inlet passage to the outlet passage from the sealing member. A generally conical, resilient body has its axially lower end mounted to the base and surround by the filter to form a generally conical air cushion opening to the closed terminal end of the outlet passage and be removable from the outlet passage with the removal of the sealing element.

Abstract: A servomotor is actuated by a pressure medium and has a piston reciprocated in the cylinder, the piston being mounted by a piston rod that extends through a cylinder end wall. The piston has a piston member bearing against the cylinder and is mounted for radial movement relative to the piston rod by a pair of piston guide plates that extend on opposite sides of the piston member. The guide plates are mounted by the piston rod for axial movement therewith.

Abstract: A hydraulic control valve and sensing mechanism for controlling flow between a motor and a pump and container that includes a slide mounted in a housing bore for movement between a neutral position and two operative position. The slide has a central collar separated from end collars by slide grooves, profilings on diametric opposite sides of the slide grooves intersecting each groove. The housing bore has a pump groove supplied with pressure medium, axially opposite motor grooves connectable to motor conduits, and axially opposite the motor grooves from the pump grooves there are container grooves connectable to the container. The pressure sensing mechanism includes at least one pressure sensing orifice that is connected to the pressure to be sensed in an operative position of the slide but not being fluidly connected thereto when the slide is in its neutral position.

Abstract: A hydraulic safety brake valve arrangement for a motor controlled by a directional control valve. The safety brake valve arrangement has a main valve closing the load lowering conduit in a rest position. Pump pressure opens the main valve to throttle exhausted fluid and at the same time throttle fluid through the supply conduit to the opposed motor chamber. A compensating valve is placed in series with the main valve throttle for the loaded side of the motor. Motor speed is thereby controlled independent of the external loading on the motor.

Abstract: Clutch and brake apparatus that is operable by a compressible fluid, particularly pneumatically, includes input and output shafts mounted in a common housing that has a clutch chamber. A clutch plate and a clutch flange are mounted in the clutch chamber with the flange being fixed to the input shaft and the clutch plate dividing the clutch chamber into two operating chambers that are adapted to be at different fluid pressures. A friction lining is fixed to at least one of the clutch plate and clutch flange for engaging the other. A clutch plate is mounted to be axially displacable relative to the output shaft in every load condition while at least one torque plate is fixed to rotate with the output shaft and a peripheral portion of the clutch plate. The torque plate is subjected to the same fluid pressure on both sides. The apparatus is able to operated with a large pressure differences across the clutch plate without danger of damaging the clutch plate.

Abstract: The refrigeration plant disclosed herein includes an evaporator, a compressor connected to the outlet of the evaporator, a condenser connected to the outlet of the compressor, a controllable expansion valve connected to the outlet of the condenser and having its outlet connected to the evaporator and condenser pressure controls for providing at the least possible condenser pressure, the degree of opening of the expansion valve to obtain an optimum ratio between the condenser pressure and the evaporator evaporator performance. That is, the degree of opening of the expansion valve lies in a range giving the least possible condenser pressure.

Abstract: A damping arrangement for damping the oscillations of valves which are controlled by pressure fluid and the control pressure conduits of which contain a throttle. A characteristic is that initial oscillations can be rapidly stabilized independently of the operating temperature of the pressure fluid. This is accomplished by the throttle having a throttle gap of which the height varies oppositely to the temperature of the pressure fluid so as to compensate fully or partially for changes in the hydraulic resistance that are occasioned by the temperature. The throttle gap is mostly traversed by laminar flow and consequently there is a high hydraulic throttling resistance even at low speeds of flow. The throttle is therefore also adapted effectively to damp small oscillations of the valve element so that the initial oscillations are rapidly stabilized.

Abstract: In order to prevent kick-back at the steering element that controls a fluid steering motor, there is provided hydrostatic steering apparatus that includes a control device connected between a priority valve and the steering motor. A load pressure conduit connects an outlet of the priority valve to a junction of the control device. The priority valve includes a tapping at which there is provided fluid pressure for moving priority valve slide, two pressure distributing throttles being connected to the tapping. A check valve that opens toward the junction is provided in the load pressure conduit between one of the distributing valves and the junction. Another check valve that opens toward the junction is fluidly connected in series with a control device supply throttle between the junction and the priority valve outlet, the supply throttle and junction being in a fluid line that supplies pressurized fluid to the steering motor.

Abstract: For maintaining a dead bolt lock handle in a locked position while the occupant of a room is inside of the room to prevent someone outside of the room unlocking the dead bolt lock, there is provided an elongated security member having a first end portion that mounts an adjustment member and a second end portion that is notched to have lock handle extend therethrough and form two legs. The adjustment member in abutting against the door serves to vary the angle of the legs relative to the door to wedgingly engage the cross bar in its locked position to prevent one exterior of the room using a key to unlock the lock. The second end portion may be directly abuttable against one of the lock housing and the door, or if necessary a spacer plate may be used to have extend between the security member and the door interior. The spacer plate has notches for the adjustment member and the lock handle to extend through.

Abstract: In order to prevent dripping in an oil supply system for a burner nozzle there is provided a pump stop valve in the supply line that connects the pressure outlet of the pump to the burner nozzle and a nozzle shut-off valve in the supply line between the pump stop valve and the nozzle. A circulating valve is provided in parallel to the pump stop valve to open when the pressure between the pump stop valve and the nozzle shut off valve is higher than the pressure at the pump outlet. As a result if the oil in the supply line adjacent the nozzle expands, oil can return through the circulating valve to the line between the pump stop valve and the pump outlet.

Abstract: An inlet nipple and a housing having a water passage extending therethrough that have first, second and third water bore portions of progressively larger diameters in a downstream direction. A variable throttle point is formed by a fixed member and a movable member acting in conjunction with the bore portions that produce a turbulent flow causing cavitation downstream of the throttle point independently of the quantity of flow. In one embodiment the movable member includes a closure portion seatable against a seat formed at the intersection of the bore portion and an annular portion that in conjunction with a bore portion forms an annular water flow space downstream of the closure portion. In the second embodiment the fixed member has a closure portion converging toward an aperture in the movable member which is in the shape of a cup.

Abstract: There is provided a connecting rod for connecting a crank pin of an electric motor to a reciprocated piston. The connecting rod includes a sheet metal shaped member that at each end has a deep drawn cylinder mounting which in turn mounts a bushing that is of a greater axial length than the cylinder mounting. The shaped member has a longitudinal bead providing a depression extending adjacent to one of the mountings and terminate in spaced relationship to the other mounting whereby there is a planar surface extending transversely across the member longitudinally between the bead and the other mounting and adjacent to the widest part of the member to provide a bending line.

Abstract: An electric laminar resistor and the method of making same wherein a thin metal film is applied to a ceramic substrate. Metal film material is removed to form a resistance track and recessed connecting zones at opposite ends of the track. A burnt-in thick layer paste is extended through the connecting zone recesses and solidified to form connecting elements that are adhered to the substrate. A glass frit coating is applied over the resistance track, but not over the connecting elements. The resistance of the resistor may be adjusted by separating a part of the track.

Abstract: A housing mounts an input shaft with a clutch flange thereon, an output shaft with a clutch plate thereon, and bearings, sleeves and adjustment nuts for retaining the shafts in selected axially adjusted positions. The clutch plate and flange extend within a clutch chamber of the housing. Friction linings are mounted on the radial outer portion of the flange on opposite sides thereof. The radial outer portions of the plate and flange have depressions into which the linings extend whereby the axial dimension of the chamber is less than the combined axial dimensions of the linings and the plate and flange radially inwardly of and adjacent to the depressions. Switching apparatus provides a pressure differential on axial opposite sides of the plate to eleastically deform the plate between a neutral position, a braking position and a driving position.