Planetary-type lapping device for finish-grinding the valve seat

Details Planetary-type lapping device for finish-grinding the valve seat Planetary-type lapping device for finish-grinding the valve seat

1992-08-17

1993-11-09

Rose, Robert A.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51241A, B24B 1502

Patent

active

052591441

ABSTRACT:
A planetary-type lapping device is used to finish-grind the surface of the valve seat of a safety relief valve and includes a gear housing which confines a gear receiving space. The gear housing has a top end with a rotatable axial shaft which extends upwardly therefrom and a bottom end. A primary gear member is mounted rotatably to the gear housing in the gear receiving space. At least one secondary gear unit is provided in the receiving space and meshes with the primary gear member. Each secondary gear unit is provided with an axle that is mounted rotatably to the gear housing and that has a lower end which extends downwardly through the bottom end of the gear housing. A grinding disc is mounted on the lower end of the axle of each secondary gear unit. Each grinding disc has a lower side formed with a grinding compound.

REFERENCES:
patent: 1819543 (1931-08-01), Barber
patent: 1941918 (1934-01-01), Schwakopf
patent: 2649669 (1953-08-01), Tobis

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