Abstract: A communication apparatus capable of communicating with an access point includes a memory containing instructions and a processor for executing the instructions to function as a storage unit configured to store, in at least one memory, each of first setting information, which can be changed by a first user and cannot be changed by a second user whose authorization is lower than that of the first user, and second setting information, which can be changed by the second user. The communication apparatus is operated using the first setting information when a predetermined authentication method is used in communication in which connection in which connection between the access point and the communication apparatus is established is used, and the communication apparatus is operated using the second setting information when the predetermined authentication method is not used.

Abstract: An object of the present invention is to provide a cam clutch capable of switching from one operating mode to another and offering improved stability of clutch operations and high responsiveness. The object is achieved by an operating mode switching means (180) having a cam attitude change part (185) being drivable independently of rotation of the inner race (110) and outer race (120). A load support point (Sp) is located radially between a load application point (Ap) of the cam attitude change part (185) on the cam (140) and a distal contact point (Ep) of the cam (140) on a raceway positioned on a radially distal side relative to the load application point (Ap). The radial distance (d1) between the load application point (Ap) and the load support point (Sp) is larger than the radial distance (d2) between the load support point (Sp) and the distal contact point (Ep).

Abstract: Two reduction gears have at least two common rotation center axes. A first power source (121) is coupled to the high-speed side of a first reduction gear (111) on a first rotation center axis (101). A second power source (122) is coupled to the high-speed side of a second reduction gear (112) on a second rotation center axis (102). A first input/output shaft (141) is coupled to the low-speed side of the second reduction gear (112) on the first rotation center axis (101). The high-speed side of the first reduction gear (111) is coupled to the low-speed side of the second reduction gear (112) on the first rotation center axis (101) via a first clutch (131). The low-speed side of the first reduction gear (111) is coupled to the high-speed side of the second reduction gear (112) on the second rotation center axis (102) via a second clutch (132).

Abstract: An object of the present invention is to provide a cam clutch capable of switching from one operating mode to another and offering improved stability of clutch operations and high responsiveness. The object is achieved by an operating mode switching means (180) having a cam attitude change part (185) being drivable independently of rotation of the inner race (110) and outer race (120). A load support point (Sp) is located radially between a load application point (Ap) of the cam attitude change part (185) on the cam (140) and a distal contact point (Ep) of the cam (140) on a raceway positioned on a radially distal side relative to the load application point (Ap). The radial distance (d1) between the load application point (Ap) and the load support point (Sp) is larger than the radial distance (d2) between the load support point (Sp) and the distal contact point (Ep).

Abstract: An object of the present invention is to provide a cam clutch capable of switching from one operating mode to another with a simple structure and with high responsiveness, and of securing an expected torque capacity. The cam clutch of the present invention includes an operating mode switch mechanism (140) for switching between a free state that allows relative rotation between an inner race (110) and an outer race (120) and a locked state that prohibits relative rotation between the inner race (110) and the outer race (120). The operating mode switch mechanism (140) includes a cam attitude change part (142) that is movable circumferentially, radially, or axially independently of the rotation of the inner race (110) and the outer race (120) to forcibly tilts a plurality of cams (131) circumferentially arranged between the inner race (110) and the outer race (120).

Abstract: Provided is a simple-structured tensioner that can reduce the processing and assembling workload. A tensioner 10 includes a plunger 20, a housing 30, a main spring 60, and a relief valve 40. The relief valve 40 includes a seat member 41, a valve member 42, and a relief spring 43. The plunger 20 includes an outward relief passage 23, and a bottom protrusion 22a protruding rearward integrally with and continuously from a plunger bottom 22. The relief spring 43 is disposed such that one end thereof is in contact with the valve member 42 while the other end is attached to the bottom protrusion 22a.

Abstract: To provide a chain tensioner and a relief valve unit that enable a reduction in the number of parts to be machined and the number of assembling steps, reduce the amount of oil flowing out to the outside, and prevent damage on a check valve, without having to increase the size of the chain tensioner. The chain tensioner includes a check valve unit that suppresses reverse flow of oil flowing into an oil pressure chamber, and a relief valve unit that releases the oil when the pressure inside the oil pressure chamber reaches or exceeds a predetermined high pressure. The check valve unit is disposed as a valve element of the relief valve unit, and the relief valve unit and the check valve unit are formed integral with each other.

Abstract: To provide a simple-structured tensioner that can maintain good sliding properties of and hydraulic pressure for the plunger. The tensioner 10 includes a sleeve 30 inserted into a cylindrical body hole 21, a plunger 40 inserted in the sleeve 30 such as to be able to advance and retract along an axial direction of the sleeve 30, and biasing unit 60 for biasing the plunger 40 toward a front side. The sleeve 30 has, at a front end of a sleeve body 31 thereof, a flange part 33 extending radially outward.

Abstract: Provided is a simple-structured tensioner that can reduce processing and assembling workload as well as increase the degree of design freedom. A tensioner 10 includes an oil supply hole 33 formed in a sleeve bottom 32 and a check valve 50 disposed on a front face of the sleeve bottom 32. The check valve 50 includes a check ball 51 and a retainer 52. The sleeve bottom 32 includes a ball seat 34 which protrudes in a cylindrical shape toward the front side integrally with and continuously from the edge of the oil supply hole 33 and on which the check ball 51 is seated.

Abstract: Provided, is a simple-structured tensioner that can. favorably expel the air that has entered an oil pressure chamber, while enabling a reduction in size in the axial direction, and in processing and assembling workload. The tensioner 10 includes a relief mechanism made up of a relief hole 22 and a disc-like orifice member 60. A first main surface 61 of the orifice member 60 is provided with an outer circumferential annular groove 61a formed along an outer peripheral edge and a communication groove 61b that extends from a central portion of the first main surface 61 to the outer circumferential annular groove 61a, The orifice member 60 has a plurality of notches 63 arranged along a circumferential direction in the outer peripheral edge of the orifice member 60.

Abstract: Provided, is a simple-structured tensioner that can. favorably expel the air that has entered an oil pressure chamber, while enabling a reduction in size in the axial direction, and in processing and assembling workload. The tensioner 10 includes a relief mechanism made up of a relief hole 22 and a disc-like orifice member 60. A first main surface 61 of the orifice member 60 is provided with an outer circumferential annular groove 61a formed along an outer peripheral edge and a communication groove 61b that extends from a central portion of the first main surface 61 to the outer circumferential annular groove 61a, The orifice member 60 has a plurality of notches 63 arranged along a circumferential direction in the outer peripheral edge of the orifice member 60.

Abstract: To provide a simple-structured tensioner capable of minimizing an increase in production cost, and avoiding performance degradation of its check valve resulting from a buildup of oil pressure inside an oil pressure chamber, while securing good assemblability of the check valve. A check valve 50 is provided in the tensioner 10 in which a ball seat 52 is fixedly set to a housing 30 or a plunger 20 and has a retainer receiving recess 52b for setting a retainer 53 on one side facing an oil pressure chamber 11.

Abstract: Provided is a simple-structured tensioner that can reduce the processing and assembling workload. A tensioner 10 includes a plunger 20, a housing 30, a main spring 60, and a relief valve 40. The relief valve 40 includes a seat member 41, a valve member 42, and a relief spring 43. The plunger 20 includes an outward relief passage 23, and a bottom protrusion 22a protruding rearward integrally with and continuously from a plunger bottom 22. The relief spring 43 is disposed such that one end thereof is in contact with the valve member 42 while the other end is attached to the bottom protrusion 22a.

Abstract: Provided is a simple-structured tensioner that can reduce processing and assembling workload as well as increase the degree of design freedom. A tensioner 10 includes an oil supply hole 33 formed in a sleeve bottom 32 and a check valve 50 disposed on a front face of the sleeve bottom 32. The check valve 50 includes a check ball 51 and a retainer 52. The sleeve bottom 32 includes a ball seat 34 which protrudes in a cylindrical shape toward the front side integrally with and continuously from the edge of the oil supply hole 33 and on which the check ball 51 is seated.

Abstract: To provide a simple-structured tensioner that can maintain good sliding properties of and hydraulic pressure for the plunger. The tensioner 10 includes a sleeve 30 inserted into a cylindrical body hole 21, a plunger 40 inserted in the sleeve 30 such as to be able to advance and retract along an axial direction of the sleeve 30, and biasing unit 60 for biasing the plunger 40 toward a front side. The sleeve 30 has, at a front end of a sleeve body 31 thereof, a flange part 33 extending radially outward.

Abstract: To provide a chain tensioner and a relief valve unit that enable a reduction in the number of parts to be machined and the number of assembling steps, reduce the amount of oil flowing out to the outside, and prevent damage on a check valve, without having to increase the size of the chain tensioner. The chain tensioner includes a check valve unit that suppresses reverse flow of oil flowing into an oil pressure chamber, and a relief valve unit that releases the oil when the pressure inside the oil pressure chamber reaches or exceeds a predetermined high pressure. The check valve unit is disposed as a valve element of the relief valve unit, and the relief valve unit and the check valve unit are formed integral with each other.

Abstract: In a hydraulic tensioner, a tensioner housing is provided with an oil outflow channel communicating with a high pressure oil chamber formed by a plunger and the tensioner housing. A control valve in the oil outflow channel can be adjusted manually or automatically to optimize the damping performance of the tensioner in different engines and under different operating conditions, thereby obviating individualized machining of tensioner components to achieve optimum damping.

Abstract: In a timing chain driving system in which the speed of a driving sprocket fluctuates cyclically, the tooth pitch of a driven sprocket from which a tension span of the chain travels toward the driving sprocket varies cyclically around the circumference of the driven sprocket so that the tooth pitch at the point at which the timing chain disengages from the driven sprocket is at a minimum when the rotational speed of the driving sprocket is maximum, moderating fluctuations in chain tension. A similar effect can be achieved in the case of a driving sprocket having a cyclically varying tooth pitch by arranging the driving sprocket so that its tooth pitch is maximum at the point at which it is engaged by the chain when its rotational speed is maximum.

Abstract: In a timing chain drive unit the tooth pitch of a driven sprocket from which a tension span of the chain travels toward a driving sprocket varies cyclically around the circumference of the driven sprocket and cyclically increases and decreases the length of the tension span in synchronism with load variations imparted to the driven sprocket by a valve-operating camshaft.

Abstract: In a hydraulic tensioner, a tensioner housing is provided with an oil outflow channel communicating with a high pressure oil chamber formed by a plunger and the tensioner housing. A control valve in the oil outflow channel can be adjusted manually or automatically to optimize the damping performance of the tensioner in different engines and under different operating conditions, thereby obviating individualized machining of tensioner components to achieve optimum damping.