Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
213 words
A vapor recovery system for use with a gasoline service station pump comprising: an underground gasoline storage tank having a fill pipe and a vapor pipe extending to the surface of the ground; an underground gasoline vapor drop-out tank, smaller than said storage tank, located adjacent said storage tank and having a vapor line extending to said service station pump and a vapor pipe extending to said surface and connected to said storage tank vapor pipe; a vent means, both of said vapor pipes connecting to said vent means; a vertically positioned pipe having an open lower end and a closed upper end extending to said storage tank from the top thereof to adjacent the bottom thereof; a tube connecting the lower end of said drop-out tank to the upper end of said vertically positioned pipe; the arrangement of said drop-out tank, said storage tank, said tube and said vertically positioned pipe being such that when the level of liquid in the underground storage tank has dropped sufficiently, a vacuum higher than the lift in said tube is created and flow of liquid will commence from the drop-out tank through said tube and continue until said drop-out tank is empty without further lowering of the level of liquid in said underground storage tank.
Claim 2
Dependent Claim
213 words
A vapor recovery system for use with a gasoline service station pump comprising: an underground gasoline storage tank having a fill pipe and a vapor pipe extending to the surface of the ground; an underground gasoline vapor drop-out tank, smaller than said storage tank, located adjacent said storage tank and having a vapor line extending to said service station pump and a vapor pipe extending to said surface and connected to said storage tank vapor pipe; a vent means, both of said vapor pipes connecting to said vent means; a vertically positioned pipe having an open lower end and a closed upper end extending to said storage tank from the top thereof to adjacent the bottom thereof; a tube connecting the lower end of said drop-out tank to the upper end of said vertically positioned pipe; the arrangement of said drop-out tank, said storage tank, said tube and said vertically positioned pipe being such that when the level of liquid in the underground storage tank has dropped sufficiently, a vacuum higher than the lift in said tube is created and flow of liquid will commence from the drop-out tank through said tube and continue until said drop-out tank is empty without further lowering of the level of liquid in said underground storage tank.
Claim 3
Dependent Claim
30 words
A vapor recovery system as recited in claim 1 including a supply pipe connecting said storage tank to said service station pump for supplying gasoline to said service station pump.
Claim 4
Dependent Claim
157 words
A vapor recovery system comprising: a storage tank for liquids; a drop-out tank, smaller than said storage tank, for collecting condensed vapors; a substantially vertical pipe having an open lower end and a closed upper end positioned in said storage tank; and a tube connecting the lower portion of said drop-out tank to the upper portion of said vertical pipe; said drop-out tank being located between the upper and lower portions of said storage tank and sufficiently near said storage tank so that when the level of liquid in the storage tank has dropped sufficiently upon removal of liquid from said storage tank a vacuum force greater than the lift in said tube is created and liquids will commence to flow from said drop-out tank through said tube and continue to flow until the level of liquid in said drop-out tank has reached the point where the tube connects to the lower portion of said drop-out tank.
Claim 5
Dependent Claim
157 words
A vapor recovery system comprising: a storage tank for liquids; a drop-out tank, smaller than said storage tank, for collecting condensed vapors; a substantially vertical pipe having an open lower end and a closed upper end positioned in said storage tank; and a tube connecting the lower portion of said drop-out tank to the upper portion of said vertical pipe; said drop-out tank being located between the upper and lower portions of said storage tank and sufficiently near said storage tank so that when the level of liquid in the storage tank has dropped sufficiently upon removal of liquid from said storage tank a vacuum force greater than the lift in said tube is created and liquids will commence to flow from said drop-out tank through said tube and continue to flow until the level of liquid in said drop-out tank has reached the point where the tube connects to the lower portion of said drop-out tank.
Claim 6
Dependent Claim
33 words
A system as described in claim 3 in which said storage tank and said drop-out tank are located underground and said condensate is condensed gasoline vapors flowing from a surface gasoline station pump.
Claim 7
Dependent Claim
30 words
A system as recited in claim 4 including vapor venting means connected to said storage tank and to said drop-out tank for venting vapor from said tanks to the atmosphere.
Claim 8
Dependent Claim
30 words
A system as recited in claim 5 including means for pumping gasoline from said storage tank to said gasoline pump and means for filling said storage tank from the surface.