| 摘要 |
<p>SELF-RELIEVING FLUID COUPLING of the Invention A high pressure hydraulic female coupler for mating with a check ball equipped male coupling includes a receptacle having an engagement bore at one end connected to the main bore at the other end. A plug is disposed in the main bore carrying a main poppet valve which is spring loaded so as to block the main bore from the engagement bore and carrying a secondary poppet valve having a portion engaging a stem on the main poppet valve and biased away therefrom to a position blocking the main bore from a secondary port connected to a fluid reservoir. The main poppet valve is equipped with a retaining pin which is slidable in a slot provided in the secondary poppet valve to limit movement therebetween so as to allow the secondary poppet valve to be in its blocking position when the main poppet valve is opened by the check ball of the male coupling abutting a poppet stem on the main poppet valve and causing the secondary poppet valve to open when the main poppet valve moves to its blocking position.</p> |
