The perforations in a film-faced wound dressing have been discovered to have edges which, though clearly defined, lack the ability to cut the neoepithelium of a healing wound, with the result that the film affords an unexpectedly high degree of comfort during movement of the patient-and most particularly, when the dressing is changed. This occurs in a thin, soft, self-supporting elastomeric film, ...

PURPOSE:To enable an engine to be prevented from its blow up resulting from a center differential gear, by providing a free wheel clutch which avoids driven running of a propeller shaft in a two-wheel-drive driven side driving system when a vehicle is in two-wheel driving operation. CONSTITUTION:A spline wheel 19 is provided integrally being juxtaposed in the second side gear 17, and a free-lock s...

PURPOSE:To enable an engine to be prevented from its blowup resulting from a center differential gear when operation is switched to two and four-wheel driving, by providing a free wheel clutch which avoids driven running of a propeller shaft in a two-wheel driving time driven side driving system at the time of two-wheel driving. CONSTITUTION:A spline wheel 19 is provided integrally in juxtapositio...

PURPOSE:To get out from slip condition by enabling selection between a full- time four wheel drive mode and a fully automatic four wheel drive mode thereby achieving a driving performance conforming to the drive conditions such as pavement conditions. CONSTITUTION:When a sleeve 44 in a changeover mechanism 40 is slided forward, a sun gear 31 in a center differential 30 is coupled with a first gear...

PURPOSE:To obtain a good speed change response by providing a bypath having a switching valve between respective hydraulic paths for feeding line pressure oil to primary and secondary pulleys and intake/discharge oil paths for a speed change control valve, thereby feeding/discharging line pressure quickly. CONSTITUTION:A spool 68 in a speed change control valve 44 is switched to the right and left...

PURPOSE:To improve speed change control by providing bevelled portions locally and circumferentially on the land edge of a spool, and then fixing the variation rate of an open area to a predetermined value. CONSTITUTION:A land 91 for opening/closing a line pressure port and a land 92 for opening/closing a drain port are provided, respectively at the opposite sides of an annular groove 90 in a spoo...

PURPOSE:To eliminate slip by providing a duty control zone for releasing belt slip at a portion higher than an upper limit of duty control zone for speed change control, and outputting a control signal to a solenoid valve when an engine enters into said control zone in order to increase the oil pressure in a hydraulic chamber. CONSTITUTION:A duty control zone for releasing belt slip is provided at...

PURPOSE:To facilitate modification of speed change characteristic by comparing a target value of operating condition with a detected value then outputting said value to an electrical control circuit and controlling a torque ratio based on the output signal through a torque ratio control means. CONSTITUTION:Rotation N'' of an input side pulley 30 having best fuel consumption corresponding to a thro...

PURPOSE:To improve feeling of engine brake by setting the speed change target values having different characteristics through plural means and selecting/setting one of them corresponding to operating condition. CONSTITUTION:Rotation N'' of an input side pulley 30 having best specific fuel consumption corresponding to a throttle opening is compared with an actual rotation N, and a speed change comm...

PURPOSE:To improve durability at transmitting section by regulating the pressure of working oil to be fed to a second hydraulic servo through a second pressure regulator so that transmission torque of a hydraulic friction engaging device will be lower than the transmission torque of a continuously variable transmission being determined corresponding to the gripping force of a drive band. CONSTITUT...

PURPOSE:To decrease frequency in use of a solenoid valve and to improve the durability by coupling a hydraulic source and a speed change hydraulic servo through an orifice when a torque ratio control valve is in closed condition. CONSTITUTION:Under steady driving, solenoid valves 84,85 are turned OFF to close an oil path 2. Under actual operation, oil is leaked from the oil path 2 thereby an input...

PURPOSE:To stabilize line pressure during stoppage by providing a means for lowering the line pressure for a first hydraulic servo when a throttle opening is smaller than a predetermined level and the torque ratio between input and output shafts of pulley is higher than a predetermined level. CONSTITUTION:When a torque ratio is higher than a predetermined level, an oil path 9 is discharged through...

PURPOSE:To prevent slip between a belt and a pulley and to improve the durability by providing a means for boosting the line pressure of a first servo line for producing a gripping force when an engine is braked. CONSTITUTION:A hydraulic regulator 60 regulates the output line pressure of a regulator valve 61 according to variation of the shift position of a manual valve 62, an opening of a throttl...

PURPOSE:To reduce shocks upon down-shift by providing a means for changing a down-shift point in a speed change map up to such a degree that a speed change instruction is issued, before the output of an engine falls into a condition under which a vehicle is driven, when it is detected that the vehicle is in a coast condition. CONSTITUTION:During normal running, a normal map in which a power charac...

PURPOSE:To restrain the generation of vibration by providing such an arrangement that when the operation of a dash pot limiting the closing speed of a throttle valve is detected, the direct coupling between the output shaft of an engine and a speed change mechanism is released. CONSTITUTION:When a dash pot arm 57 makes contact with a dash pot spool 61 in association with the closing of the throttl...

PURPOSE:To prevent a slips due to entrance of rain drops into a speed reduction gear for a cooling tower blower or the like by sealingly disposing a drive pulley, a driven pulley and a belt in a hollow housing in such a secured condition that their shafts may not be moved. CONSTITUTION:A blower installed in a cooling tower or the like, has fan blades 19 which are rotated by a closed type induction...

A method and device for fine profiling or shaping tools coated with super-hard material, for example cubic crystalline boron nitride or diamond, especially tools coated with a single layer and having a prescribed or predetermined profile or shape. The rotatably driven tool is profiled or shaped in the region of the cutting surface by a clustered electron or laser beam which is controlled in a cour...

The perforations in a film-faced wound dressing have been discovered to have edges which, though clearly defined, lack the ability to cut the neoepithelium of a healing wound, with the result that the film affords an unexpectedly high degree of comfort during movement of the patient-and most particularly, when the dressing is changed. This occurs in a thin, soft, self-supporting elastomeric film, ...

A hydraulic control system disclosed herein comprises a line pressure regulator valve which regulates the fluid supplied from a pump to provide a line pressure variable at least depending upon output torque of the engine. The line pressure is supplied to a shift control valve which regulates the fluid supply to and discharge from cylinder chambers of drive and driven pulleys.

This disclosure relates to a simple mounting structure for a dental X-ray apparatus. The structure is used in combination with a substantially horizontal treatment bed in such manner that irradiation tube of an X-ray head is designed to take a correct position with respect to the mouth region of a patient lying on the treatment bed with his head resting on the headrest of the bed. The structure in...