Kelly bushing
United States Patent 2620163
US Patent References:
/0702509.html
- - 0702509

/0782043.html
- - 0782043

/0851728.html
- - 0851728

/1094972.html
- - 1094972

Tubular shaft coupling
- - 1918108


Inventors:
Stone, Albert L.
Publication Date:
12/02/1952
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Assignee:
STANDARD OIL DEV CO
Primary Class:
464/75
Other Classes:
464/168, 464/89, 384/45, 464/165
International Classes:
E21B3/04; F16C29/06; E21B3/00
US Patent References:
2160516Bushing for rotary tables
2211881Kelly bar bushing
2259460Resilient drive bushing
Foreign References:
AT125573B