| 摘要 |
1,112,494. Hydraulic training apparatus. EXOTRONIC SYSTEMS Ltd. 21 Oct., 1966 [23 Oct., 1965], No. 47357/66. Heading A6M. A training apparatus comprises a cylinder 11 attached at its base to a plate 19, and containing a piston 22 attached by rod 32 to a handle 72. The piston 22 divides the cylinder 11 into two ports 24 and 25 which are connected externally by tubing 36, via a valve 64 and another valve 40 which opens at a predetermined pressure, in parallel. An equalising tank 66 and a pressure gauge 65 are attached to the tubing, and the system, excluding the equilising tank 66 is filled with hydraulic fluid. The handle 72 (when pulled) will not move until a certain pressure is reached, at which the valve 40 opens. Above this pressure (which can be varied) the handle 72 can be moved, thus providing a reproducible measure of the effort being used by the person training. In another embodiment (Fig. 2 not illustrated) the valve 40 is replaced by a pump (90) so that a certain force has to be . applied to prevent motion of the piston. Other embodiments in which the pump and valve are combined in parallel in one apparatus, and one in which high and low pressure valves and gauges are used are also described.
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