A transfer device that includes a case that houses a transfer mechanism; a strainer that suctions oil stored in a lower portion of the case; a valve body that has a hydraulic supply circuit that supplies a hydraulic pressure to the transfer mechanism and a suction oil path that discharges an extra hydraulic pressure that is extra for the hydraulic supply circuit; a first suction inlet that communicates with one of the suction oil path and the strainer and a second suction inlet that communicates with the other of the suction oil path and the strainer, and a balanced vane pump.

[Problem] To provide a relief device for an oil circuit of an engine provided with an oil pressure relief valve and a temperature-sensitive relief valve, with which it is possible for oil to be relieved (expelled) at the intended pressure regardless of the oil temperature, and with which it is possible to simplify the configuration. [Solution] The relief device comprises an oil pump (9), an upstream channel (61) provided from a discharge side of the oil pump (9) to an engine (E), an oil pressure relief valve (A) for relieving oil due to the valve body being moved by oil pressure, and a temperature-sensitive relief valve (B) for relieving oil by sensing the oil temperature and continuously opening and closing. The oil pressure relief valve (A) and the temperature-sensitive relief valve (B) are arranged in parallel in the upstream channel (61).

[Problem] To provide a relief device for an oil circuit of an engine provided with an oil pressure relief valve and a temperature-sensitive relief valve, with which it is possible for oil to be relieved (expelled) at the intended pressure regardless of the oil temperature, and with which it is possible to simplify the configuration. [Solution] The relief device comprises an oil pump (9), an upstream channel (61) provided from a discharge side of the oil pump (9) to an engine (E), an oil pressure relief valve (A) for relieving oil due to the valve body being moved by oil pressure, and a temperature-sensitive relief valve (B) for relieving oil by sensing the oil temperature and continuously opening and closing. The oil pressure relief valve (A) and the temperature-sensitive relief valve (B) are arranged in parallel in the upstream channel (61).

This disclosure generally relates to an automatic bicycle, particularly to a hydraulic automatic transmission bicycle which can automatically and adaptively change gear ratios. More particularly, this disclosure relates to those hydraulic automatic transmission bicycles which use fluid pressure to change such gear ratios, and which include various hydraulic automatic transmissions which may be provided in various configurations and may operate in various methods and sequences to provide automatic and infinitely variable gear ratios.

This disclosure generally relates to an automatic bicycle, particularly to a hydraulic automatic transmission bicycle which can automatically and adaptively change gear ratios. More particularly, this disclosure relates to those hydraulic automatic transmission bicycles which use fluid pressure to change such gear ratios, and which include various hydraulic automatic transmissions which may be provided in various configurations and may operate in various methods and sequences to provide automatic and infinitely variable gear ratios.

The application relates to a system for conveying a medium having not less than two working machines (2, 2a, 2b, 2c) that each have not less than one carrier shaft (25, 35) with transport elements (22, 32) for the medium to be conveyed arranged on them, and not less than one drive (3, 3a, 3b, 3c) that sets the respective carrier shaft (25, 35) in rotation, with multiple working machines (2, 2a, 2b, 2c) connected in series, so that the medium is conveyed to a working machine (2, 2a, 2b, 2c) arranged downstream, and so that a separate drive (3, 3a, 3b, 3c) is assigned to each of the working machines (2, 2a, 2b, 2c) and that the drives (3, 3a, 3b, 3c) are connected in parallel with each other and connected to a common power supply system (5).

The application relates to a system for conveying a medium having not less than two working machines (2, 2a, 2b, 2c) that each have not less than one carrier shaft (25, 35) with transport elements (22, 32) for the medium to be conveyed arranged on them, and not less than one drive (3, 3a, 3b, 3c) that sets the respective carrier shaft (25, 35) in rotation, with multiple working machines (2, 2a, 2b, 2c) connected in series, so that the medium is conveyed to a working machine (2, 2a, 2b, 2c) arranged downstream, and so that a separate drive (3, 3a, 3b, 3c) is assigned to each of the working machines (2, 2a, 2b, 2c) and that the drives (3, 3a, 3b, 3c) are connected in parallel with each other and connected to a common power supply system (5).

A relief valve structure (20) attached to a pump body (10) includes: a first discharge portion (31) for discharging oil when a discharge pressure is a first predetermined pressure; a second discharge portion (32) for discharging the oil when the discharge pressure reaches a second predetermined pressure higher than the first predetermined pressure; a third discharge portion (33) for discharging the oil when the discharge pressure exceeds the first predetermined pressure and reaches the second predetermined pressure or a pressure lower than the second predetermined pressure; and a pressure relief hole (34) for releasing the oil from an area around a valve spring (23). The second discharge portion, the first discharge portion, the third discharge portion, and the pressure release hole are provided in this order between an introduction portion (29) and a spring retaining member (24) when viewed from the introduction portion (29).

A relief valve structure (20) attached to a pump body (10) includes: a first discharge portion (31) for discharging oil when a discharge pressure is a first predetermined pressure; a second discharge portion (32) for discharging the oil when the discharge pressure reaches a second predetermined pressure higher than the first predetermined pressure; a third discharge portion (33) for discharging the oil when the discharge pressure exceeds the first predetermined pressure and reaches the second predetermined pressure or a pressure lower than the second predetermined pressure; and a pressure relief hole (34) for releasing the oil from an area around a valve spring (23). The second discharge portion, the first discharge portion, the third discharge portion, and the pressure release hole are provided in this order between an introduction portion (29) and a spring retaining member (24) when viewed from the introduction portion (29).

A variable displacement vane pump includes a biasing element for urging the control ring toward a first position that corresponds to a maximum volumetric capacity of the pump. Fluid pressure within a control chamber urges the control ring toward the second position. A feedback path is in communication with a fluid outlet of the pump for supplying a pressurized fluid. A first supply path provides the pressurized fluid to the fluid inlet. A second supply path provides the pressurized fluid to the control chamber. A valve controls flow of the pressurized fluid via the second supply path by moving between a fully open position and a fully closed position in which flow of the pressurized fluid along the second supply path is prevented by the valve. Moving the valve from the open position to the closed position increases the fluid pressure within the control chamber.