An exercise device having a simple and inexpensive configuration including an exercise load unit connected to a movable knee hold unit, and a seat unit having a seat plate and a back plate which are selectively or completely movable during an exercise, irrespective of whether or not a leg support un
An exercise device having a simple and inexpensive configuration including an exercise load unit connected to a movable knee hold unit, and a seat unit having a seat plate and a back plate which are selectively or completely movable during an exercise, irrespective of whether or not a leg support unit having foot holders is in a fixed state or in a movable state, thereby being capable of achieving a variety of exercises for the whole part of the human body using the upper body or lower body, or using both the upper and lower bodies.
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An exercise device having a simple and inexpensive configuration including an exercise load unit connected to a movable knee hold unit, and a seat unit having a seat plate and a back plate which are selectively or completely movable during an exercise, irrespective of whether or not a leg support un
An exercise device having a simple and inexpensive configuration including an exercise load unit connected to a movable knee hold unit, and a seat unit having a seat plate and a back plate which are selectively or completely movable during an exercise, irrespective of whether or not a leg support unit having foot holders is in a fixed state or in a movable state, thereby being capable of achieving a variety of exercises for the whole part of the human body using the upper body or lower body, or using both the upper and lower bodies. hird port together with the second land, an elastic member being disposed between the valve body and the third land to bias the valve spool. 5. The hydraulic control system of claim 1 wherein the second pressure control valve is provided with a first port for receiving the reduced pressure from the reducing valve, a second port for receiving hydraulic pressure from the manual valve, a third port for supplying the hydraulic pressure fed through the second port to the second fail-safe valve, and a fourth port for receiving control pressure from the second solenoid valve, the ports of the second pressure control valve being controlled by a valve spool installed in a valve body, the valve spool comprising a first land on which hydraulic pressure fed through the first port acts, a second land on which hydraulic pressure fed through the first port acts to selectively open and close the second port, and a third land for selectively communicating the second port with the third port together with the second land, an elastic member being disposed between the third land and the valve body to bias the valve spool. 6. The hydraulic control system of claim 1 wherein the third pressure control valve is provided with a first port for receiving reduced pressure from the reducing valve, a second port for receiving hydraulic pressure from the manual valve, a third port for supplying the hydraulic pressure fed through the second port to the second switch valve, and a fourth port for receiving control pressure from the third solenoid valve, the ports of the third pressure control valve being controlled by a valve spool installed in a valve body, the valve spool comprising a first land on which the hydraulic pressure fed through the first port acts, a second land on which the hydraulic pressure fed through the first port acts to selectively open and close the second port, and a third land for selectively communicating the second port with the third port, an elastic member being disposed between the valve body and the third land to bias the valve spool. 7. The hydraulic control system of claim 1 wherein the first switch valve is designed to supply N-D range pressure to one of a second clutch and a first brake. 8. The hydraulic control system of claim 1 wherein the first switch valve is provided with a first port for receiving N-D range pressure from the manual valve as control pressure, a second port for receiving L range pressure from the manual valve as control pressure, a third port for receiving control pressure from the on/off solenoid valve, a fourth port for receiving hydraulic pressure from the first pressure control valve, a fifth port for supplying hydraulic pressure fed through the fourth port to the second clutch and the first and second fail-safe valves as control pressure, a sixth port for supplying hydraulic pressure fed through the fourth port to the first fail-safe valve, and first and second exhaust ports for exhausting hydraulic pressure returning to the fifth and sixth ports, the ports of the first switch valve being controlled by a valve spool installed in the valve body, the valve spool comprising a first land on which control pressure fed through the first port acts, a second land for selectively communicating the fourth port with the sixth port, a third land for selectively communicating the fourth port with the fifth port, a fourth land on which control pressure fed through the third port acts, and a fifth land on which control pressure fed through the second port acts. 9. The hydraulic control system of claim 8 wherein the first switch valve: is controlled by control pressure fed through the first port and supplies operating pressure from the pressure control valve to a second clutch in first, second, third and fourth speeds; and is controlled by pressure control pressure fed through the second and third ports in the low L range and supplies operating pressure from the first pressure control valve to the first brake, th
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이 특허에 인용된 특허 (8)
McArthur James A. (Coquitlam CAX) Short David C. (Port Coquitlam CAX), Back exercise apparatus.
Brown Thomas D. (303 De La Cruz Weatherford TX 76086) Helm Hulbert R. (Rte. 2 ; Box 35 Comanche TX 76442), Friction exercise device having a single supply and take up reel.
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