| 摘要 |
<p>PROBLEM TO BE SOLVED: To assist air leaked from a pressurized chamber in the case where pressurizing operation is stopped by a pump, and surely carry out re-pressurizing operation of a hemadynamometer by arranging a fine ventilating passage which communicates from the pressurizing chamber with outside air. SOLUTION: A pressurizing chamber 1 is formed in such a constitution that a bottom surface is formed in a nearly circular cone surface shape so as to form a conical cross sectional shape. A case 3 is constituted by overlapping a lower case 31 and an upper case 32 which are formed individually, and a flange part 24 of a diaphragm body 2 is sandwiched and held between the upper and lower cases 31, and 32. A re-pressurizing projection 41 is arranged little higher than it on a rim part of an intake hole 38. In the case where pressure in the pressurizing chamber 1 is higher than that of outside air, it is prevented the intake valve 25 from pushed to the intake hole 38 and tightly fitting to each other, a little clearance remains, and air is leaked slightly while ventilating from the clearance so as to prevent the remaining of pressure. An exhaust spring 4 is arranged on the outside of the exhaust valve 26, an inne diameter of a part of the upper case 32 arranged on the outside of the exhaust hole 39 is enlarged, and is held inside thereof. And downward pre- pressure (press fitting force) is applied to the exhaust valve 26 by compression force.</p> |
