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US 11,959,556 B2Granted
Pressure relief valve assembly
AssigneeDADCO, Inc.
InventorDavid John Gretka, II
Life of this patent
Estimating the term…
Abstract
A gas pressure relief valve assembly with a normally closed check valve received in a main body. An actuator pin slidably received in a guide body threadably carried by the main body may be advanced to open the check valve and retracted to permit the check valve to close. A knob connected to the actuator pin and threadably carried by the guide body may be manually rotated in opposite directions to advance and retract the actuator pin. Rotary loosening of the threaded knob and/or loosening of the threaded guide body will retract the actuator pin and prevent opening of the check valve.
Claims18
A pressure relief valve assembly comprising:
- a body with at least one flow passage in the body providing at least part of an opening to the exterior of the body, wherein the body comprises a main body and a guide body carried by the main body;
- a normally closed check valve in the at least one flow passage in the body which when closed prevents the flow of compressed gas through the at least one passage and to the exterior of the body and when opened permits flow of gas through the at least one passage and to the exterior of the body;
- an actuator pin slidably carried by the body and movable relative to the body to an advanced position opening the normally closed check valve and to a retracted position permitting the check valve to close;
- and
- a knob connected to the actuator pin and having threads engaged with complementary threads carried by the body and rotatable in one of a clockwise or counterclockwise direction to advance the actuator pin relative to the body to open the check valve and rotatable in the other of the clockwise or counterclockwise direction to retract the actuator pin relative to the body to permit the check valve to close;
- wherein the body includes a shoulder engaged by at least a portion of the actuator pin to limit the extent to which the actuator pin is retracted relative to the body, wherein the actuator pin includes a flange adjacent an end of the pin adjacent the check valve, and the guide body includes the shoulder engaged by the flange to limit the extent to which the actuator pin is retracted relative to the guide body.
3 more elements
A pressure relief valve assembly comprising:
- a body with at least one flow passage in the body providing at least part of an opening to the exterior of the body;
- a normally closed check valve in the at least one flow passage in the body which when closed prevents the flow of compressed gas through the at least one passage and to the exterior of the body and when opened permits flow of gas through the at least one passage and to the exterior of the body;
- an actuator pin slidably carried by the body and movable relative to the body to an advanced position opening the normally closed check valve and to a retracted position permitting the check valve to close;
- and
- a knob connected to the actuator pin and having threads engaged with complementary threads carried by the body and rotatable in one of a clockwise or counterclockwise direction to advance the actuator pin relative to the body to open the check valve and rotatable in the other of the clockwise or counterclockwise direction to retract the actuator pin relative to the body to permit the check valve to close,
- wherein the actuator pin has a stop portion engageable with the body to limit the extent to which the actuator pin can be advanced relative to the check valve by rotation of the knob.
3 more elements
A pressure relief valve assembly comprising:
- a body with at least one flow passage in the body providing at least part of an opening to the exterior of the body, wherein the body comprises a main body and a guide body carried by the main body;
- a normally closed check valve in the at least one flow passage in the body which when closed prevents the flow of compressed gas through the at least one passage and to the exterior of the body and when opened permits flow of gas through the at least one passage and to the exterior of the body;
- an actuator pin slidably carried by the body and movable relative to the body to an advanced position opening the normally closed check valve and to a retracted position permitting the check valve to close;
- and
- a knob connected to the actuator pin and having threads engaged with complementary threads carried by the body and rotatable in one of a clockwise or counterclockwise direction to advance the actuator pin relative to the body to open the check valve and rotatable in the other of the clockwise or counterclockwise direction to retract the actuator pin relative to the body to permit the check valve to close;
- a collar slidably received on the actuator pin adjacent an end of the actuator pin distal from the check valve, a retainer engaging the actuator pin adjacent such distal end thereof and retaining the collar on the actuator pin, the collar being slidably received in a bore in the knob and the collar being retained in the bore in the knob.
3 more elements
A pressure relief valve assembly comprising:
- a body with at least one flow passage in the body providing at least part of an opening to the exterior of the body;
- a normally closed check valve in the at least one flow passage in the body which when closed prevents the flow of compressed gas through the at least one passage and to the exterior of the body and when opened permits flow of gas through the at least one passage and to the exterior of the body;
- an actuator pin slidably carried by the body and movable relative to the body to an advanced position opening the normally closed check valve and to a retracted position permitting the check valve to close;
- a knob connected to the actuator pin and having threads engaged with complementary threads carried by the body and rotatable in one of a clockwise or counterclockwise direction to advance the actuator pin relative to the body to open the check valve and rotatable in the other of the clockwise or counterclockwise direction to retract the actuator pin relative to the body to permit the check valve to close;
- and
- a gas spring with a gas pressure chamber and the at least one flow passage of the body is configured for communication with the pressure chamber of the gas spring upstream of the check valve in the at least one flow passage.
3 more elements
A relief valve assembly comprising:
- a main body with a first bore and a coaxial first counterbore collectively extending axially through the main body;
- a guide body with a second bore and a coaxial second counterbore collectively axially extending through the guide body and substantially coaxially with the first bore and counterbore of the main body, and the guide body carried by the main body;
- a normally closed check valve in the first bore of the main body which when closed prohibits flow of compressed gas through the main body into the counterbore of the guide body and when open permits flow of compressed gas through the first bore of the main body and into the second counterbore of the guide body;
- at least one outlet passage in the guide body communicating the counterbore of the guide body with the exterior of the guide body;
- an actuator pin received at least in part in the second bore and counterbore of the guide body with a clearance between the actuator pin and the second counterbore of the guide body to permit the flow of compressed gas between the actuator pin and the second counterbore and through the at least one outlet passage when the check valve is at least partially open;
- and
- a knob connected to the actuator pin and with threads engaging complementary threads on the guide body and configured so that rotation of the knob in one of a clockwise or counterclockwise direction advances the actuator pin to at least partially open the normally closed check valve and rotation of the knob in the other of the clockwise or counterclockwise direction retracts the actuator pin relative to the main body to permit the check valve to close,
- wherein the knob has a stop portion engageable with the guide body to limit the extent to which the actuator pin may be advanced relative to the check valve by rotation of the knob or the actuator pin has a stop portion engageable with the main body to limit the extent to which the actuator pin can be advanced relative to the check valve by rotation of the knob, or both the knob and the actuator pin have stop portions engageable with the guide and main bodies respectively to limit the extent to which the actuator pin can be advanced relative to the check valve by rotation of the knob.
5 more elements
Dependencies are inferred from the claim text.