| 摘要 |
The invention is an improvement in joints between conduits and/or fittings. The invention is exemplified particularly as embodied in a concrete pump. The concrete pump has a pair of cylinders that discharge into a manifold, the manifold having a flapper valve in it, and a single discharge conduit. The manifold is hinged to the concrete pump so that it can be swung and locked in a position wherein its passageways are joined to the cylinders and the joint can be opened by swinging it about its hinge. Similarly, the discharge conduit is provided with a hinge hinging it to the manifold so that it can be swung into a position forming a joint with the manifold and a continuous passageway formed from the manifold through the discharge conduit and this joint may be opened by swinging the discharge conduit away from he manifold. |
