A clack valve assembly comprising: a valve seat comprising an opening; a bearing comprising a recess with a base, a mouth, and a pair of side walls between the base and the mouth; a lid comprising a lid plate and a shaft, the shaft being received in the recess of the bearing; and a shaft retaining m
A clack valve assembly comprising: a valve seat comprising an opening; a bearing comprising a recess with a base, a mouth, and a pair of side walls between the base and the mouth; a lid comprising a lid plate and a shaft, the shaft being received in the recess of the bearing; and a shaft retaining member which closes the mouth of the recess in the bearing, thus retaining the shaft within the recess. The shaft and the lid plate are integrally formed elements of a single part. The shaft can rotate within the recess to enable the lid to rotate from a closed position in which the lid engages the valve seat and covers the opening, to an open position in which the lid lifts away from the valve seat enabling fluid to flow through the opening in the valve seat.
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1. A clack valve assembly, comprising: a. a valve base member having a base plate and a valve seat comprising an opening, wherein the base plate includes an attachment surface;b. a bearing comprising a recess with a base, a mouth, and a pair of side walls between the base and the mouth;c. a lid comp
1. A clack valve assembly, comprising: a. a valve base member having a base plate and a valve seat comprising an opening, wherein the base plate includes an attachment surface;b. a bearing comprising a recess with a base, a mouth, and a pair of side walls between the base and the mouth;c. a lid comprising a lid plate and a shaft, the shaft being received in the recess of the bearing, wherein the shaft and the lid plate are integrally formed elements of a single part; andd. a shaft retaining member which is placed over the mouth of the recess to close the mouth of the recess in the bearing and is attached to the attachment surface of said base plate of the valve base member, thus retaining the shaft within the recess, wherein said shaft retaining member is disposed between said attachment surface of said base plate and said lid plate,wherein the shaft can rotate within the recess to enable the lid to rotate from a closed position in which the lid engages the valve seat and covers the opening, to an open position in which the lid lifts away from the valve seat enabling fluid to flow through the opening in the valve seat, and wherein the shaft retaining member comprises a stop feature which engages the lid when the lid opens beyond a stop angle to hinder the lid from opening beyond the stop angle. 2. A clack valve assembly, comprising: a. a valve base member having a base plate and a valve seat comprising an opening, wherein the base plate includes an attachment surface;b. a bearing comprising a recess with a base, a mouth, and a pair of side walls between the base and the mouth;c. a lid comprising a lid plate and a shaft, the shaft being received in the recess of the bearing, wherein the shaft and the lid plate are integrally formed elements of a single part; andd. a shaft retaining member which is placed over the mouth of the recess to close the mouth of the recess in the bearing and is attached to the attachment surface of said base plate of the valve base member, thus retaining the shaft within the recess, wherein said shaft retaining member is disposed between said attachment surface of said base plate and said lid plate,wherein the shaft can rotate within the recess to enable the lid to rotate from a closed position in which the lid engages the valve seat and covers the opening, to an open position in which the lid lifts away from the valve seat enabling fluid to flow through the opening in the valve seat, and wherein the clack valve assembly further comprises a first stop feature which engages the lid when the lid opens to a first stop angle to hinder the lid from opening beyond the first stop angle; and wherein the shaft retaining member comprises a second stop feature which engages the lid if the first stop feature fails to prevent the lid from opening beyond the first stop angle and reaches a second stop angle at which the second stop feature engages the lid and hinders the lid from opening beyond the second stop angle. 3. A clack valve assembly according to claim 2 wherein the valve seat and the first stop feature are integrally formed elements of a valve body member. 4. A clack valve assembly comprising: a. a valve base member having a base plate having a first side and an opposing second side, and a valve seat comprising an opening, wherein the base plate includes an attachment surface, and wherein the valve seat is on the opposing second side of the base plate as the attachment surface;b. a bearing comprising a recess with a base, a mouth, and a pair of side walls between the base and the mouth;c. a lid comprising a lid plate and a shaft, the shaft being received in the recess of the bearing, wherein the shaft and the lid plate are integrally formed elements of a single part; andd. a shaft retaining member which is placed over the mouth of the recess to close the mouth of the recess in the bearing and is secured to the attachment surface of said base plate of the valve base member, thus retaining the shaft within the recess, wherein said shaft retaining member is disposed between said attachment surface of said base plate and said lid plate,wherein the shaft can rotate within the recess to enable the lid to rotate from a closed position in which the lid engages the valve seat and covers the opening, to an open position in which the lid lifts away from the valve seat enabling fluid to flow through the opening in the valve seat. 5. A clack valve assembly according to claim 4 wherein the valve seat and the bearing are integrally formed elements of a valve body member. 6. A clack valve assembly according to claim 5 wherein the shaft retaining member is attached to the valve body member by removable fasteners. 7. A clack valve assembly according to claim 4 wherein the shaft and lid plate are integrally formed elements of a single part of polymeric material. 8. A clack valve assembly according to claim 4 wherein the bearing comprises a first bearing member and a second bearing member, each bearing member comprising a recess with a base, a mouth, and a pair of side walls between the base and the opening; the lid comprises a lid plate and a pair of lid arms extending from the lid plate; the shaft extends between the lid arms; the shaft, the lid plate and the lid arms are integrally formed elements of a single part; the shaft is received in the recesses of the first and second bearing members; and the shaft retaining member closes the mouths of the recesses in the bearing members, thus retaining the shaft within the recesses, wherein the shaft can rotate within the recesses to enable the lid to rotate from a closed position in which it engages the valve seat to an open position in which it lifts away from the valve seat enabling fluid to flow through the opening in the valve seat. 9. A clack valve assembly according to claim 4 wherein the lid comprises a resilient sealing member which is attached to the lid plate and which engages the valve seat when the lid is in its closed position. 10. A clack valve assembly according to claim 4 wherein the base of the recess is curved. 11. A clack valve assembly according to claim 4 wherein the lid plate covers the opening when the lid is in its closed position. 12. A fuel system comprising a clack valve assembly according to claim 4. 13. An aircraft comprising a fuel system according to claim 12. 14. A method of assembling a clack valve assembly according to claim 4, the method comprising: a. inserting the shaft into the recess through the mouth of the recess; andb. after step a., closing the mouth of the recess in the bearing with the retaining member, thus retaining the shaft within the recess.
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Gradle Richard Joseph, Adjustable quick closing disk check value with flow indicator.
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