摘要:
A hard film is covered on the outer circumferential surface of a piston ring by means of an arc ion plating. The hard film has a mixture of crystal structure of CrN and crystal structure of Mo.sub.2 N containing oxygen in a solid solution state, and comprises chromium at 40 to 78 percent by weight, molybdenum at 3 to 35 percent by weight, oxygen at 3 to 20 percent by weight and the remainder of nitrogen. The crystal particle size is less than 1 .mu.m. The Vickers hardness is within a range from 1600 to 2500. The film thickness is preferably 1 to 60 .mu.m. Carbon in a solid solution state at 0.5 to 8 percent by weight may be substituted for the oxygen. Alternatively, both oxygen and carbon may be contained in a solid solution state with oxygen at 3 to 20 percent by weight, carbon at 0.5 to 8 percent by weight with the total content of carbon and oxygen within 25 percent by weight.
摘要:
A Cr.sub.2 N film or a mixed Cr.sub.2 N and Cr film formed by physical vapor deposition on the outer circumferential surface of a piston ring which is in contact with the inner circumferential surface of a cylinder. The axial width of the outer circumferential surface of the piston ring is 0.6 mm or less. The nitrogen content of the film is 11 to 17 percent by weight. The Vicker's hardness of the film is in the range of HV1300 to HV2000. The thickness of the film is 3 .mu.m to 30 .mu.m.
摘要:
A combined oil ring is comprised of paired upper and lower side rails, and a spacer expander. The side rails are made of martensitic stainless steel and are subjected to gas nitriding. The spacer expander is made of austenitic stainless steel, with a substantially U-shaped cross section, and has an under layer formed by soft nitriding, and has a Cr.sub.2 N film. The Cr.sub.2 N film has a hardness of HV1300 to HV2000 and a thickness of 3 .mu.m to 30 .mu.m. The Cr.sub.2 N film is formed by ion plating on the soft-nitrided layer of the outer circumferential surface.
摘要:
A hard film is formed on the outer circumferential surface of a piston ring by means of a physical vapor deposition process. The hard film is a ternary film comprising molybdenum, chromium, and 4 to 22 percent nitrogen by weight, and includes at least molybdenum nitride and chromium nitride. The film has a Vickers hardness of 1400 to 2600, and the crystal grain size of the film is less than 1 .mu.m.
摘要:
An under coating 2 and a hard film 3 are formed on the outer circumferential surface of a piston ring 1 by an ion plating process. The under coating 2 is composed of at least one of Cr, Cr.sub.2 N, and CrN. The hard film 3 is composed of a hard coating material containing 3 percent to 20 percent by weight of oxygen in a solid solution state in a crystal structure of CrN and having the Vickers hardness of 1600 to 2200.
摘要:
A hard film 2 is applied to cover an outer circumferential surface of a piston ring 1 by an ion plating process. Either 3 percent to 20 percent by weight of oxygen, or 2 percent to 11 percent by weight of carbon is included in a solid solution state in a crystal structure of CrN in the hard film 2. The Vickers hardness of the hard film 2 is in a range of 1600 to 2200.
摘要:
The present invention provides an audio/visual data communication system including an audio/visual data reproducing device capable of changing the type of data to be transmitted. Further, the present invention provides an audio/visual data transmitting device and an audio/visual data reproducing device forming the audio/visual data communication system. An audio data reproducing speaker 3 includes an instruction input unit 33 that inputs an instruction to change data transmitted from an audio data transmitting device, a message generating unit 32 that generates a message for requesting to change data on the basis of the instruction, and a message transmitting unit 31 that transmits the message. The audio data transmitting device includes a message receiving unit that receives the message transmitted from the message transmitting unit 31, a data setting unit that sets data on the basis of the message, a data generating unit that generates transmission data on the basis of the data set by the data setting unit, and a data transmitting unit that transmits the transmission data.
摘要:
A riding type mower includes: a vehicle body, a driver's seat mounted on the vehicle body; an operation part arranged around the driver's seat; a mower unit provided on the vehicle body; a shutter for closing a discharge port; a shutter moving mechanism for moving the shutter between a close position closing the discharge port and an open position opening the discharge port; and a lock mechanism for locking the shutter at the close position. The mower unit includes: a mower deck; a cutting blade installed inside the mower deck; the discharge port formed in the mower deck, through which mown grass cut by the blade is discharge from the mower unit to outside. A shutter operating tool for remotely operating the shutter moving mechanism to open and close the shutter is provided in the operation part. The lock mechanism is remotely operable from the operation part.
摘要:
A vibration isolation mechanism for a coil spring, according to the invention, includes a spring retainer 24 that supports a return spring 20. The spring retainer 24 comprises a pedestal retainer 25 and a holding retainer 26. A seat winding portion 20a of the return spring 20 is elastically and firmly held between a holding portion 30a of the pedestal retainer 25 and holding portions 31a of the holding retainer 26. Accordingly, vibrations of the return spring 20 are forcedly damped, so that the generation of an abnormal noise caused by vibrations of the return spring 20 is suppressed even when a minute clearance is present between the seat winding portion 20a and a second turn portion of the return spring 20.
摘要:
A grass collecting apparatus for a lawn mower comprises a frame (22) supported by a vehicle body, a container supporting member (26) for supporting a grass collecting container (21) for storing grass clippings and including a container supporting surface (27) for receiving an opening edge of the grass collecting container, and a container cover (23) mounted on the frame to be oscillatable about a horizontal axis between a closed position and an opened position. An engaging member (35) is mounted on the container cover (23). The engaging member (35) is engageable with the opening edge (21b) of the grass collecting container (21) with oscillation of the container cover (23) from the opened position to the closed position, thereby positioning and maintaining the grass collecting container (21) on the container supporting member (26), and disengageable from the opening edge (21b) of the grass collecting container (21) with oscillation of the container cover (23) from the closed position to the opened position.