Valves and valve actuation – Blow-out preventers
Patent
1975-07-11
1977-08-30
Schwadron, Martin P.
Valves and valve actuation
Blow-out preventers
277129, E21B 3306
Patent
active
040449882
ABSTRACT:
A blow out ram preventer comprising a housing with a longitudinal cavity and a transverse through bore. Rams are arranged in the cavity of the housing to reciprocate therein relative to the bore. The transverse spacing between longitudinal guides at the walls of the cavity is uniformly reduced in the direction from the ends of the housing to the bore, the ram packer being reinforced from the bore side with radial metal members while the body of the ram is comprised of a plurality of members adapted to move relative to one another during movement of the ram.
REFERENCES:
patent: 1586923 (1926-06-01), Townsend
patent: 1695992 (1928-12-01), Bergsten
patent: 2193110 (1940-03-01), Penick et al.
patent: 2255829 (1941-09-01), Spang et al.
patent: 2746710 (1956-05-01), Jones
patent: 3737139 (1973-06-01), Watts
Aliverdizade Kerim Salim ogly
Arzumanov Suren Akopovich
Danieliants Armais Avakovich
Frenkel Boris Ovseevich
Rasi-Zade Artur Tair ogly
Gerard Richard
Schwadron Martin P.
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