Aircraft petcock lock

Details Aircraft petcock lock Aircraft petcock lock

1980-08-29

1982-11-09

Callaghan, Thomas F.

Locks

Special application

For control and machine elements

70177, 70178, 137382, 137383, 220210, F16L 3500, F16K 3510, G05G 500

Patent

active

043578144

ABSTRACT:
A lock apparatus shields the valve stem of a petcock and prevents unauthorized opening of the petcock.

REFERENCES:
patent: 441357 (1890-11-01), Crowell
patent: 1360944 (1920-11-01), Harkins et al.
patent: 1542036 (1925-06-01), Conrader
patent: 1592835 (1926-07-01), Mock et al.
patent: 1666562 (1928-04-01), Gits
patent: 1705590 (1929-03-01), Simpson
patent: 1764367 (1930-06-01), Szymanski
patent: 1771382 (1930-07-01), Kramer
patent: 1997113 (1935-04-01), Lewis
patent: 2089300 (1937-08-01), Schlitz
patent: 2365080 (1944-12-01), Humphreys
patent: 2660872 (1953-12-01), Beach
patent: 3744284 (1973-07-01), Waldenstrom
patent: 3862555 (1975-01-01), Wirth
patent: 4067213 (1978-01-01), Little
patent: 4069692 (1978-01-01), Hemphill

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