Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1976-04-01
1977-01-04
Smith, Al Lawrence
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51241S, B24B 1900
Patent
active
040005844
ABSTRACT:
A lapping apparatus for in-situ grinding of valve body seats of a gate va 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.
REFERENCES:
patent: 1993844 (1935-03-01), Karnath
patent: 2360009 (1944-10-01), Norton
patent: 2360550 (1944-10-01), Culp
Higa Teikichi
Nakano Gregory
Orillo, Jr. Stephen
Uyetake Tadao
Johnston Ervin F.
Sciascia Richard S.
Smith Al Lawrence
Smith James G.
The United States of America as represented by the Secretary of
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