Mechanical fuel pressure operated device for supplying a fuel/oil mixture

A combined oil pumping and fuel supplying device comprising a housing including a central partition, said housing also including first wall means including said central partition and a first movable wall defining a variable volume discharge chamber adapted for fluid communication with a point of use, said discharge chamber varying in volume between a greater volume and a lesser volume, said housing also including second wall means including said central partition and a second movable wall defining an inlet chamber which is adapted to communicate with a source of fuel under pressure, said second movable wall having therein an orifice, said housing and said second movable wall also defining a regulator chamber communicating through said orifice with said inlet chamber, valve means communicating between said discharge chamber and said inlet chamber and including a port in said central partition and a valve member forming a part of said second movable wall and movable relative to said port between open and closed positions, means in said regulator chamber biasing said second movable wall so as to locate said valve member in said closed position, engageable means on said valve member and on said first movable wall for displacing said valve member to said open position in response to contraction of said discharge chamber to said lesser volume, and means responsive to variation in volume of one of said discharge chamber and said inlet chamber for pumping oil for supply to a point of use.

A combined oil pumping and fuel supplying device comprising a housing including a central partition, said housing also including first wall means including said central partition and a first movable wall defining a variable volume discharge chamber adapted for fluid communication with a point of use, said discharge chamber varying in volume between a greater volume and a lesser volume, said housing also including second wall means including said central partition and a second movable wall defining an inlet chamber which is adapted to communicate with a source of fuel under pressure and which is variable in volume between a larger volume and a smaller volume, means biasing said discharge chamber to said lesser volume, means biasing said inlet chamber to said smaller volume, valve means communicating between said discharge chamber and said inlet chamber and including a port in said central partition, and a valve member movable relative to said port between open and closed positions, said valve member being engageable by said first movable wall so as to displace said valve member to said open position in response to contraction of said discharge chamber to said lesser volume, said valve member being engageable by said second movable wall so as to displace said valve member to said closed position in response to contraction of said inlet chamber to said smaller volume, and means responsive to variation in volume of one of said discharge chamber and said inlet chamber for pumping oil for supply to a point of use.