Butterfly valve having a split vane
First Claim
Patent Images
1. A butterfly valve comprisinga housing defining an opening for a flow of fluid;
- a butterfly vane mounted in said housing to selectively open and close said opening to a flow of fluid, said vane including a pair of discs; and
means for pivoting said discs, said means including a first shaft connected to one of said discs for pivoting said discs in a first direction, a second shaft connected to the other of said discs and positioned coaxially of said first shaft for pivoting said other disc in a second direction opposite said first direction, and a transmission connected to said shafts to rotate said shafts simultaneously in opposite directions to move said discs between respective closed positions and open positions thereof.
2 Assignments
0 Petitions
Accused Products
Abstract
The butterfly vane is constructed of two semi-circular parts, each of which pivots about a common longitudinal axis. One part is mounted on a shaft which is connected to a drive while the second part is mounted on a second shaft concentrically of the first shaft. The second shaft is driven in an opposite direction off the first shaft by a suitable transmission. The construction of the split vane and transmission is such that the closing torques are reduced to near zero eliminating the sharp torque gradients in throttling angles greater than 60°.
35 Citations
13 Claims
-
1. A butterfly valve comprising
a housing defining an opening for a flow of fluid; -
a butterfly vane mounted in said housing to selectively open and close said opening to a flow of fluid, said vane including a pair of discs; and means for pivoting said discs, said means including a first shaft connected to one of said discs for pivoting said discs in a first direction, a second shaft connected to the other of said discs and positioned coaxially of said first shaft for pivoting said other disc in a second direction opposite said first direction, and a transmission connected to said shafts to rotate said shafts simultaneously in opposite directions to move said discs between respective closed positions and open positions thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A butterfly valve comprising
a butterfly vane having a pair of semi-circular discs sequentially mounted on a common axis, said discs defining a line of separation therebetween when closed which is disposed at a right angle to said common axis, said axis passing transversely through each said disc; - and
means for pivoting said discs in opposite directions to each other about said common axis from a closed position to an open position. - View Dependent Claims (9, 10, 11, 12, 13)
- and
Specification