F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
284/2
F16L 29/00 (2006.01) A01B 71/02 (2006.01) F16K 15/00 (2006.01) F16L 37/22 (2006.01) F16L 37/28 (2006.01)
Patent
CA 1242226
A FLOW CHECK MECHANISM Abstract of the Disclosure A flow check mechanism is disclosed which is useful in a female coupler for preventing closure of a male coupler coupled thereto should a vacuum occur in the female coupler. The flow check mechanism includes a housing having a cylindrical bore formed therein with an inlet port at one end and an outlet port at an opposite end. Formed within the cylindrical bore, between the inlet and outlet ports, is a pair of recesses. A resilient ball is positioned in the cylindrical bore between the pair of recesses and has an outside diameter slightly larger than the inside diameter of cylindrical bore but less than the diameter of either of the recesses. The flow check mechanism further includes first and second springs positioned in the cylindrical bore between the inlet port and the ball and between the ball and the outlet port, respectively. The springs retain the ball in contact with the inner periphery of the cylindrical bore when the fluid pressure forces acting on opposite sides of the ball are approximately equal. When the fluid pressure impinging on a given side of the resilient ball exceeds the fluid and spring forces on the opposite side of the ball, the ball will move into alignment with the respective recess and relieve the fluid pressure forces acting thereon. Since springs of different spring forces may be used, it is possible for the resilient ball to permit fluid flow in one direction at a low pressure and to permit fluid flow in the opposite direction at a higher pressure.
452053
Borden Ladner Gervais Llp
Deere & Company
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