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7422029 |
Linear damper for check valve
A damping system, for a valve with a flapper movable between an open position and a closed position, comprises a main body and a piston. The main body has at least an inner wall that defines a...
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6012483 |
Switch-over valve having pivot axle articulated closure wings
A switch-over valve for a compound water meter includes an annular-shaped housing defining an annular valve seat and a central throughflow cross section, a pivot extending across the housing and...
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5819791 |
Check valve including means to permit selective back flow
A preferred embodiment of FIGS. 1-3 includes a check valve (10) with a pair of semicircular check valve members (34, 36) normally permitting fluid flow in one direction and blocking fluid flow in...
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5241166 |
Low resolution target acquisition
A label and a process are provided for encoding target acquisition information and data information on an optically readable label at different resolutions. A multiplicity of cells is arranged in a...
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4942898 |
Automatic culvert directional flow control device
An automatic culvert directional flow control device comprising a flange or support ring supporting a hinge assembly. A pair of dampers are joined to the hinge in a pivoting and a vertical...
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4874936 |
Hexagonal, information encoding article, process and system
The article of the invention is an optically readable label for storing encoded information, said label comprising a data energy of a multiplicity of information-encoded hexagons contiguously...
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4658857 |
Control valve with split disc
A control valve utilizing the conventional dual wafer check valve, which check valve has a pair of semicircular plates pivotally mounted about a pivot rod at the adjacent straight edge surfaces...
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4377181 |
High temperature dual butterfly valve
A large, high temperature, cost-effective butterfly valve with provisions for simple internal inspection and repair through a transverse access opening that is substantially smaller than the valve...
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4269166 |
Stack damper valve
A stack damper valve comprising a pair of semicircular steel discs typically joined by a removable piano-type hinge. Each of the discs pivot upwardly in the direction of flow from a closed to an...
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4017026 |
Automatic damper
Automatic damper having pivotal semi-circular vanes which are moved to open position by pivotal movement of a longitudinal element disposed along the central gap between the vanes. The movement of...
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