Freeze plug

Details Freeze plug Freeze plug

1989-07-21

1990-06-05

Kamen, Noah P.

Internal-combustion engines

Cooling

Indicators and safety devices

123 415, 138 89, 220201, 220352, 29525, F01P 514

Patent

active

049304593

ABSTRACT:
A cup-shaped freeze plug for a coolant hole in an engine block. The plug includes a base section having a diameter less than the hole's nominal diameter, the base diameter being sized to permit the plug to be hand-fitted into the coolant hole at an intermediate non-sealing position. The plug also includes a rim section formed integral with the base section, the rim section having a diameter greater than the hole's nominal diameter, the rim diameter being sized to allow the plug to be force-fitted into the coolant hole at a final coolant sealing position.

REFERENCES:
patent: 397839 (1889-02-01), Dodge
patent: 787460 (1905-04-01), Mosher
patent: 1492248 (1924-04-01), Hachmann
patent: 1710363 (1929-04-01), Kramer
patent: 1888319 (1932-11-01), Hopkins
patent: 3333723 (1967-08-01), Wisman
patent: 3889841 (1975-06-01), Edmonds
patent: 4750457 (1988-06-01), Bonutti

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