Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1975-06-30
1979-08-28
Weakley, Harold W.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251194, F16K 2500
Patent
active
041658582
ABSTRACT:
A gate valve in which a threaded movable rod supports a cam that serves as a mounting for first and second floating valve plates that are disposed back to back, which valve plates when the cam is in a first position may be moved adjacent to first and second valve seats. The rod at all times has a portion thereof encircled by a cylindrical sleeve. The sleeve has at least one slot therein defined by first and second legs that are angularly disposed relative to one another. The sleeve also has guide means therein to prevent the first and second valve plates from pivoting from positions where they are substantially parallel to the first and second valve seats. A protuberance is secured to the rod and engages the slot. When the protuberance is in the first leg of the slot the first and second valve plates are in first positions and may be moved into and out of the path of flow of fluid through the valve. However, upon the rod being moved to the extent that the protuberance is in the second leg, the first and second valve plates are not only disposed in a fluid flow obstructing position but are forced into pressure sealing contact with the first and second valve seats. The sleeve serves the dual function of preventing pivotal movement of the first and second valve plate, as well as in conjunction with the protuberance and rod in moving the first and second valve plates into and out of sealing contact with the first and second valve seat.
REFERENCES:
patent: 1705481 (1929-03-01), Karnath
patent: 2879798 (1959-03-01), Anderson
patent: 2919885 (1960-01-01), Daigle
patent: 2934310 (1960-04-01), Kinney
patent: 2977086 (1961-03-01), Heinen
patent: 3626498 (1971-12-01), Rihm
patent: 3854696 (1974-12-01), Keyes
Babcock William C.
Weakley Harold W.
LandOfFree
Gate valve structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gate valve structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gate valve structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-765414