Abstract A valve body is provided with a transverse bore for fluid flow therethrough with a lateral bore intersecting the transverse bore for receiving a valve element therein for opening and closing the transverse bore. The valve element has a stem connected thereto that is connected to a valve operator supported on the valve body which valve operator positions the valve member or element to open or close the transverse bore in the valve body and thus control flow through the valve. First seal means are mounted in the lateral bore to close off one end thereof and for sealably engaging the valve stem. Second seal means mounted in the lateral bore sealably engage the valve stem and are exposed to fluid from the transverse bore so that a predetermined force is exerted to move the element as it moves to close the valve. Third seal means are mounted on the valve stem which sealably and slidably engages the lateral bore and the cross-sectional area of the valve stem and third seal means is larger than the cross-sectional area of the valve stem where it sealably engages the second seal means. Fluid passage means in the valve stem receives fluid from the transverse bore on the upstream side of the element and discharges it between the first seal means and third seal means to aid in moving the element when opening the valve. A shaft is threadedly supported in the valve housing and upon rotation it engages the piston to move the valve operator so as to position the valve member within the valve body for flow therethrough; thereafter the threaded shaft may be backed off from the piston. Plunger means are mounted in the housing and is urged exteriorly thereof when the valve element is in a position so that flow may be conducted through the valve body so as to indicate the position of the valve member or element within the body.
In a valve including a body having a transverse bore for fluid flow therethrough and having a lateral bore intersecting the transverse bore for receiving therein an element for closing and opening the transverse bore to fluid flow and a movable valve stem in the body connected to move the element in the transverse bore for opening and closing the valve, the improvement comprising: a. first seal means mounted in the lateral bore to close off one end thereof and sealably engaging the valve stem; b. second seal means mounted in the lateral bore in spaced relation to said first seal means to close off the other end thereof and sealably engaging the valve stem and being exposed to fluid from the transverse bore whereby a predetermined minimum force is exerted on the valve stem by the fluid in the transverse bore to aid in moving the element when closing the valve; c. third seal means mounted on the valve stem between said first and second seal means for sealably and slidably engaging the lateral bore, the cross sectional area of the valve stem and said third seal means being larger than the cross sectional aRea of the valve stem where it sealably engages said second seal means; and d. therebeing fluid passage means in the valve stem for receiving fluid pressure from the transverse bore on the upstream side of the element and discharging the fluid pressure to the lateral bore between said first and third seal means to act on said third seal means and aid in moving the element when opening the valve.
Claim 2
Dependent Claim
266 words
In a valve including a body having a transverse bore for fluid flow therethrough and having a lateral bore intersecting the transverse bore for receiving therein an element for closing and opening the transverse bore to fluid flow and a movable valve stem in the body connected to move the element in the transverse bore for opening and closing the valve, the improvement comprising: a. first seal means mounted in the lateral bore to close off one end thereof and sealably engaging the valve stem; b. second seal means mounted in the lateral bore in spaced relation to said first seal means to close off the other end thereof and sealably engaging the valve stem and being exposed to fluid from the transverse bore whereby a predetermined minimum force is exerted on the valve stem by the fluid in the transverse bore to aid in moving the element when closing the valve; c. third seal means mounted on the valve stem between said first and second seal means for sealably and slidably engaging the lateral bore, the cross sectional area of the valve stem and said third seal means being larger than the cross sectional aRea of the valve stem where it sealably engages said second seal means; and d. therebeing fluid passage means in the valve stem for receiving fluid pressure from the transverse bore on the upstream side of the element and discharging the fluid pressure to the lateral bore between said first and third seal means to act on said third seal means and aid in moving the element when opening the valve.
Claim 3
Dependent Claim
37 words
The invention of claim 1 including passage means in said body between said second and third seal means for venting the lateral bore therebetween to atmosphere for accommodating movement of said third seal means and valve stem.
Claim 4
Dependent Claim
105 words
The invention of claim 1 including: a. a valve actuator housing carried by the valve body and including end members connected by a cylindrical side; b. piston means secured to the valve stem and sealably engaging said cylindrical side of said valve actuator housing; c. spring means normally urging said piston means and connected valve stem to position the element for closing off flow through the transverse bore; and d. a shaft threadedly positioned in said valve actuator housing for engaging said piston upon rotation of said shaft to thereby move said piston against said spring means and move the element to open the valve.
Claim 5
Dependent Claim
40 words
The invention of claim 3 including passage means in said valve actuator housing for conducting fluid thereinto to act on said piston means to urge said piston means against said spring means to move the element to open the valve.
Claim 6
Dependent Claim
12 words
The invention of claim 3 including means to rotate said shaft means.
Claim 7
Dependent Claim
66 words
The invention of claim 1 including spring supported plunger means mounted on one of said end members and extending into said valve actuator housing, whereby when said piston means is urged longitudinally of said valve actuator housing said plunger means is engaged by said piston means and is moved out of said housing as an indication of the position of the element in the valve body.
Claim 8
Dependent Claim
15 words
The invention of claim 6 including means for instrumentally noting movement of said plunger means.