Accession Number : ADD003892

Title :   In-Situ Lapping Apparatus for Gate Valves.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Uyetake,Tadao ; Higa,Teikichi ; Orillo,Stephen , Jr ; Nakano,Gregory

Report Date : 04 Jan 1977

Pagination or Media Count : 5

Abstract : A lapping apparatus for in-situ grinding of valve body seats of a gate valve which includes a pair of plugs which are expandable within the inlet and outlet of openings of the gate valve for retention therein, a pair of grinding discs which are rotatably mounted on the plugs with freedom of reciprocal movement along the axes of rotation for grinding the valve body seats, a rod with an enlarged end which is extendable into the valve body for engaging the grinding discs and biasing them along the axes of rotation against the valve body seats, and a tube for receiving the rod and extendable into the valve body for engaging and driving the grinding discs about the axes of rotation. (Author)

Descriptors :   *Patents, *Gate valves, *Grinding, Piping systems, Ship structural components, Leakage(Fluid)

Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs

Distribution Statement : APPROVED FOR PUBLIC RELEASE