TIMING DEVICE FOR INTERMITTENT VACUUM REGULATOR
First Claim
1. A timing device for an intermittent vacuum regulator, comprising:
- a diaphragm assembly comprising a diaphragm housing, a return spring, and a diaphragm projecting at least partially out of the diaphragm housing;
a piston rod comprising a first end and a second end, wherein the first end is coupled to the diaphragm;
a connecting rod comprising an upper free end coupled to the second end of the piston rod and a lower fixed end coupled to a valve pin; and
a piston stop comprising a semicircular C-shaped portion on its front side and a semi-cylindrical portion on its back side;
wherein the piston rod directly pushes and pulls the connecting rod, such that during an intermittent operation of the timing device, the upper free end of the connecting rod rotates about the valve pin but is being limited in a range of motion by the piston stop.
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Accused Products
Abstract
A timing device for an intermittent vacuum regulator comprises a diaphragm assembly that includes a diaphragm housing, a return spring, and a diaphragm projecting at least partially out of the diaphragm housing. A piston rod is coupled to the diaphragm. A connecting rod comprising an upper free end coupled to the piston rod and a lower fixed end coupled to a valve pin is provided. A piston stop comprising a semicircular C-shaped portion on its front side and a semi-cylindrical portion on its back side is also provided, wherein the piston rod directly pushes and pulls the connecting rod, such that during an intermittent operation of the timing device to actuate a valve assembly, the upper free end of the connecting rod rotates about the valve pin but is being limited in a range of motion by the piston stop.
19 Citations
20 Claims
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1. A timing device for an intermittent vacuum regulator, comprising:
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a diaphragm assembly comprising a diaphragm housing, a return spring, and a diaphragm projecting at least partially out of the diaphragm housing; a piston rod comprising a first end and a second end, wherein the first end is coupled to the diaphragm; a connecting rod comprising an upper free end coupled to the second end of the piston rod and a lower fixed end coupled to a valve pin; and a piston stop comprising a semicircular C-shaped portion on its front side and a semi-cylindrical portion on its back side; wherein the piston rod directly pushes and pulls the connecting rod, such that during an intermittent operation of the timing device, the upper free end of the connecting rod rotates about the valve pin but is being limited in a range of motion by the piston stop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A timing device for an intermittent vacuum regulator, comprising:
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a diaphragm assembly comprising a diaphragm housing, a return spring, and a diaphragm projecting at least partially out of the diaphragm housing; a piston rod comprising a first end and a second end, wherein the first end is coupled to the diaphragm; a connecting rod comprising an upper free end coupled to the second end of the piston rod and a lower fixed end coupled to a valve pin; a crankpin configured to perpendicularly couple the second end of the piston rod to the upper free end of the connecting rod; a valve assembly comprising a flywheel and a valve plate; a torsion spring coupling the valve assembly to the connecting rod; a piston stop comprising a semicircular C-shaped portion on its front side and a semi-cylindrical portion on its back side; wherein the piston rod directly pushes and pulls the connecting rod, such that during an intermittent operation of the timing device, the upper free end of the connecting rod rotates about the valve pin but is being limited in a range of motion by the piston stop. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of timing an intermittent vacuum regulator, wherein the regulator comprises a timing device having a diaphragm housing enclosing a return spring, a diaphragm coupled to a piston rod, a connecting rod coupled to the piston rod, the method comprising:
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actuating the piston rod to move sideways in the direction of the diaphragm housing; pulling the connecting rod with the piston rod to move in the same direction toward the diaphragm housing to a first critical point; rotating the flywheel and the valve plate as a unit; and actuating the connecting rod to move in an opposite direction away from the diaphragm housing to a second critical point, thereby rotating the flywheel and the valve plate as a unit to their original positions. - View Dependent Claims (17, 18, 19, 20)
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Specification