Reciprocating valve having stem cleaning means
AssigneeInternational Telephone and Telegraph Corporation
InventorAlbert J. Hanssen
Life of this patent
Estimating the term…
Abstract
A reciprocating valve is formed with a valve stem extending through a packing box which includes an outwardly facing conical surface disposed about the valve stem. The conical surface terminates in a knife-like edge which functions to remove accumulations of foreign material from exposed portions of the valve stem. As the stem moves into the packing box, a non-metallic liner is disposed between the packing box and the valve stem for positioning the knife-like edge in close proximity to and concentric with the valve stem.
Claims13
In a valve of the type that has a body with a valve seat disposed therein, a valve member disposed in said body for engagement with the valve seat and a reciprocating valve stem attached to said valve member and having a portion exposed by extending out of the valve body, the improvement comprising:
- first means fixedly mounted to the valve body and disposed about the valve stem at a position where said stem extends from said body for removing foreign matter from the exposed portion of the valve stem as the stem is reciprocated into the valve body;
- and
- bearing means disposed between said first means and said reciprocating valve stem for providing a tight fitting non-seizing bearing surface between said first means and the valve stem and for positioning said first means relative to the valve stem.
A valve comprising:
- a valve body having a valve seat formed therein;
- a valve member disposed in said body for engagement with said valve seat;
- a valve stem attached to said valve member and extending from said body;
- a valve actuator mounted to said valve body and connected to said valve stem for controllably reciprocating said stem and valve member;
- first means fixedly attached to said valve body and disposed about said valve stem at a position where said stem extends from said valve body for removing foreign matter from the valve stem as the stem is moved by the actuator into the valve body;
- and
- bearing means disposed between said first means and the reciprocating valve stem for providing a tight fitting non-seizing bearing surface between said first means and the valve stem and for positioning said first means relative to the valve stem.
Dependencies are inferred from the claim text.