| 摘要 |
<p>1507257 Flap valves NIPPON OIL SEAL INDUSTRY CO Ltd 2 June 1976 [16 July 1975] 22829/76 Heading F1B [Also in Division F2] A reed valve has a body 1 with a port 3 and seat 9 for a valve plate 7 which when unstressed is flat and with a rest plate 5 is attached to a support surface 2, the support surface being inclined with respect to the seat so that when assembled the valve plate is bent as it contacts the seat. The valve is used in suction or exhaust passages of internal combustion engines. The object of the angled seat is to overcome the seating difficulty at contact point (21), Fig. 1 (not shown), associated with the prior art. In alternative embodiments the support surface (22), Fig. 3 (not shown) may be part of the surface of the body around the port, the seat surface being at an angle thereto, also, the surface of seat (39), Fig. 4 (not shown) may be curved. The preferred taper angle is from 1 to 3 degrees. The seat material is preferably nitryl or fluorinerubber.</p> |
