Dual shut-off valve for two-cycle engines
OwnerWilliam D. Luffyinventor
Life of this patent
Estimating the term…
Abstract
A dual shut-off valve includes a valve body having a first inlet passage for communicating with the fuel supply line, a second inlet passage for communicating with the oil supply line, a first outlet passage and a second outlet passage. A first valve ball has a center passage and is rotatable between a first valve open position and a first valve closed position. A second valve ball has a center passage and is rotatable between a second valve open position and a second valve closed position. A shaft is coupled between the first valve ball and the second valve ball for rotating the first valve ball between the first valve open and closed positions and simultaneously rotating the second valve ball between the second valve open and closed positions. A handle can be used to rotate the shaft.
Claims20
A shut-off valve for a two-cycle internal combustion engine having a fuel supply line and an oil supply line, the shut-off valve comprising:
- a valve body having a first inlet passage in fluid communication with the fuel supply line, a second inlet passage in fluid communication with the oil supply line, a first outlet passage and a second outlet passage;
- a first valve ball having a passage therethrough and being rotatable between:
- a first valve open position wherein the first valve ball passage is in fluid communication with the first inlet passage and the first outlet passage;
- and
- a first valve closed position wherein the first valve ball passage is out of fluid communication with the first inlet passage and the first outlet passage;
- a second valve ball having a passage therethrough and being rotatable between:
- a second valve open position wherein the second valve ball passage is in fluid communication with the second inlet passage and the second outlet passage;
- and
- a second valve closed position wherein the second valve ball passage is out of fluid communication with the second inlet passage and the second outlet passage;
- a shaft coupled between the first valve ball and the second valve ball so that, when the shaft is rotated between a first shaft position and a second shaft position, the first valve ball rotates between the first valve open position and the first valve closed position and the second valve ball rotates between the second valve open position and the second valve closed position;
- and
- a handle coupled to the shaft to rotate the shaft between the first shaft position and the second shaft position.
A shut-off valve adapted for simultaneously shutting off a fuel supply line and an oil supply line of a two-cycle internal combustion engine, the shut-off valve comprising:
- a valve body having a first bore and a second bore, the first and second bore being substantially parallel with each other;
- a first inlet nipple disposed, at least in part, within the first parallel bore and having a first inlet passage in communication with the fuel supply line;
- a second inlet nipple disposed, at least in part, within the second parallel bore and having a second inlet passage in communication with the oil supply line;
- a first outlet nipple disposed, at least in part, within the first parallel bore and having a first outlet passage;
- a second outlet nipple disposed, at least in part, within the second parallel bore and having a second outlet passage;
- a first valve ball having a passage therethrough and being rotatable between:
- a first valve open position wherein the first valve ball passage is in fluid communication with the first inlet passage and the first outlet passage;
- and
- a first valve closed position wherein the first valve ball passage is out of fluid communication with the first inlet passage and the first outlet passage;
- a second valve ball having a passage therethrough and being rotatable between:
- a second valve open position wherein the second valve ball passage is in fluid communication with the second inlet passage and the second outlet passage;
- and
- a second valve closed position wherein the second valve ball passage is out of fluid communication with the second inlet passage and the second outlet passage;
- a shaft rotatable between a first shaft position and a second shaft position, the shaft being coupled to the first valve ball and the second valve ball so that:
- when the shaft is in the first shaft position, the first valve ball is in the first valve open position and the second valve ball is in the second valve open position;
- and
- when the shaft is in the second shaft position, the first valve ball is in the first valve closed position and the second valve ball is in the second valve closed position;
- and
- means for rotating the shaft between the first shaft position and the second shaft position.
A method for simultaneously controlling a fuel supply line and an oil supply line of an internal combustion engine, the method comprising:
- providing a shutoff valve including:
- a valve body having a first fluid passage generally oriented along a first axis and a second fluid passage generally parallel to the first fluid passage;
- a first valve ball having a passage therethrough, the first valve ball being positioned within the first fluid passage and being rotatable between:
- an open position wherein first valve ball passage is in fluid communication with the first fluid passage;
- and
- a closed position wherein the first valve ball passage is not in fluid communication with the first fluid passage;
- a second valve ball positioned within the second passage and being rotatable between;
- an open position wherein the second valve ball passage is in fluid communication with the second fluid passage;
- and
- a closed position wherein the second valve ball passage is not in fluid communication with the second fluid passage;
- a shaft rotatable between a first shaft position and a second shaft position, the shaft being coupled to the first valve ball so that:
- when the shaft is in the first shaft position, the first valve ball is in the first valve open position and;
- and
- when the shaft is in the second shaft position, the first valve ball is in the first valve closed position;
- and
- means for rotating the shaft between the first shaft position and the second shaft position;
- placing the fuel supply line in fluid communication with one of the first fluid passage and the second fluid passage;
- and
- placing the oil supply line in fluid communication with the other of the first fluid passage and the second fluid passage.
Dependencies are inferred from the claim text.