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US 4,072,167 AGranted
Check valve with torsion spring and method of assembly
AssigneeCaterpillar Tractor Co.
InventorCyril W. Habiger
Life of this patent
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AssigneeCaterpillar Tractor Co.
InventorCyril W. Habiger
Estimating the term…
A check valve comprises a housing having a ball normally disposed on a seat defined therein to prevent communication of fluid from an inlet to an outlet thereof. A torsion spring is mounted on the housing to have an end thereof engage the ball to hold it in its normally closed position and to permit opening thereof to communicate the inlet with the outlet when the level of fluid pressure in the inlet exceeds a predetermined level. In the preferred embodiment, the torsion spring is mounted on a rotary member rotatably mounted in the housing to selectively adjust the closing force applied to the ball to vary the pressure setting thereof. During assembly of the valve, a pin is secured to the housing in blocking relationship across an outlet passage to limit pivotal movement of the end of the spring and to prevent the ball from rolling therepast.
In a valve of the type comprising a housing having an inlet and an outlet defined therein, a seat defined in said housing between said inlet and said outlet, and a valve member normally disposed on said seat for preventing fluid flow from said inlet to said outlet, the invention comprising torsion spring means having a first end thereof operatively engaging said valve member for biasing the same against said seat under a predetermined closing force and for permitting unseating thereof from said seat to permit said inlet to communicate with said outlet when the force of said fluid in said inlet exceeds said predetermined closing force and adjusting means connected to said torsion spring means and otherwise independent thereof for selectively varying the closing force of said torsion spring means against said valve member comprising a rotary member rotatably mounted in said housing and wherein said torsion spring means has a second end thereof disposed and anchored in a recess formed in said rotary member and wherein coils thereof are mounted on a boss formed on an end of said rotary member.
A method for assembling a valve comprising the steps of
In a valve of the type comprising a housing having an inlet and an outlet defined therein, a seat defined in said housing between said inlet and said outlet, a ball loosely mounted in said housing and normally disposed on said seat for preventing fluid flow from said inlet to said outlet, torsion spring means having a first end thereof extending transversely relative to a longitudinal axis thereof and operatively engaging the periphery of said ball but otherwise unattached therewith for biasing the same against said seat under a predetermined closing force and for permitting unseating thereof from said seat to permit said inlet to communicate with said outlet when the force of said fluid in said inlet exceeds said predetermined closing force and stop means independent of said spring means secured to said housing and disposed in blocking relationship across said outlet on a downstream side of said ball for preventing said ball from moving therepast and for limiting movement of the first end of said spring means.
A method for assembling a valve comprising the steps of
In a valve of the type comprising a housing having an inlet and an outlet defined therein, a seat defined in said housing between said inlet and said outlet, and a velve member normally disposed on said seat for preventing fluid flow from said inlet to said outlet, the invention comprising torsion spring means having a first end thereof operatively engaging said valve member for biasing the same against said seat under a predetermined closing force and for permitting unseating thereof from said seat to permit said inlet to communicate with said outlet when the force of said fluid in said inlet exceeds said predetermined closing force, adjusting means connected to said torsion spring means and otherwise independent thereof for selectively varying the closing force of said torsion spring means against said valve member comprising a rotary member rotatably mounted in said housing and wherein said torsion spring means has a second end thereof anchored to said rotary member and holding means for selectively holding said rotary member in a selected rotated position relative to said housing comprising a set screw threadably mounted in said housing and normally engaging an outer surface of said rotary member to hold it in said selected rotational position.
Dependencies are inferred from the claim text.