Device for automatically lapping wedge-gate valve seat

Details Device for automatically lapping wedge-gate valve seat Device for automatically lapping wedge-gate valve seat

1976-10-04

1978-09-19

Whitehead, Harold D.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

B24B 1900

Patent

active

041143230

ABSTRACT:
A device for automatically lapping a wedge-shaped gate valve seat has a main frame including a flange disposed on its upper end portion and a guiding unit disposed on its lower portion. With the flange disposed upon a valve body of the gate valve, either of the valve seats is opposed to a lapping plate rotatably disposed within the guiding unit. The plate intimately contacts the valve seat through the operation of a fluid cylinder and laps it while simultaneously rotating and revolving. Devices for supplying a lapping agent, wiping it and sensing the state of the lapped seat are disposed within the guiding unit and are movable to their operating position. The seat can also be observed through a periscopic observation glass extending through the main frame.

REFERENCES:
patent: 1993844 (1935-03-01), Karnath
patent: 2723512 (1955-11-01), Gibson et al.
patent: 4000584 (1977-01-01), Uyetake

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