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Hydraulic quick disconnect coupling

  • US 6,016,835 A
  • Filed: 02/23/1998
  • Issued: 01/25/2000
  • Est. Priority Date: 02/23/1998
  • Status: Expired due to Term
First Claim
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1. A female coupler, comprising:

  • a housing having an internal bore with an open forward end adapted to receive a male coupler, a first port in the housing for supplying pressurized fluid to the bore,a valve body disposed in the bore and axially moveable in the housing, said valve body including a main cavity opening to the forward end of the housing bore, a peripheral inlet passage through the valve body communicating with the main cavity, and an interior valve seat in the valve body,a poppet valve disposed in the main cavity of the valve body and spring-biased against the valve seat to normally prevent fluid flow through the valve body, said poppet valve including a forward projection adapted to engage a check valve in the male coupler when the male coupler is received in the housing,a piston including a central bore receiving the poppet valve and slidably disposed between the poppet valve and the valve body, and including an internal flow passage extending from a forward axial end surface of the piston to a rearward axial end surface of the piston and radially outwardly disposed from the central bore to fluidly connect the inlet passage with a portion of the main cavity rearward of the piston and to an outer rear surface of the piston, said piston engaging the poppet valve when moved forward to assist in moving the poppet valve forwardly against excessive pressures in the male coupler.

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