Gate valve
AssigneeSMC Corporation
InventorsKenji Waragai, Tsuneo Ishigaki
Life of this patent
Estimating the term…
Abstract
A gate valve comprises a valve rod for making displacement in accordance with a driving action of a cylinder mechanism; a guide shaft for guiding the valve rod; a valve disk for opening/closing a passage in accordance with a displacement action of the valve rod; a rack connected to the valve rod, for making displacement integrally with the valve rod; a pinion rotatably supported by a casing, for meshing with the rack; and a pillow member connected to the valve disk and formed with a male thread for making engagement with a female thread formed on an inner circumferential surface of the pinion.
Claims11
A gate valve comprising:
- a driving mechanism;
- a valve rod for making displacement in accordance with a driving action of said driving mechanism;
- a guide shaft for guiding said valve rod;
- a valve disk for opening/closing a passage formed through a valve box in accordance with a displacement action of said valve rod;
- and
- a displacement mechanism provided with a block member connected to said guide shaft, for displacing said valve disk in a direction substantially perpendicular to an axis of said valve rod, wherein:
- said displacement mechanism includes a rack member connected to said valve rod, for making displacement integrally with said valve rod;
- a pinion rotatably supported by said block member, for meshing with said rack member;
- and a pillow member connected to said valve disk and formed with a male thread to be engaged with a female thread formed on an inner circumferential surface of said pinion.
Dependencies are inferred from the claim text.