Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1976-05-17
1977-10-25
Lanham, C.W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29401R, 228119, 251329, 138 97, 285 21, 285286, 285 15, 285331, B23P 700, B23P 1500, F16K 2710
Patent
active
040549780
ABSTRACT:
A valve bonnet structure has an inner ring spaced slightly from the inner surface of the bonnet structure and secured along its lower edge portion to the bonnet. An angle-shaped member having a downturned leg lapping the ring is secured to the inner surface of the bonnet structure above the ring. For repair of the valve, an upper valve bonnet portion having the angle-shaped member thereon is removed by a cutting tool with the ring remaining in place on the lower valve bonnet portion. After repair of the valve, the upper and lower valve bonnet portions are welded together adjacent the ring with the downturned leg thereon fitting over the ring, and a seal between the leg and ring prevents fluid within the valve structure from being exposed to the welding operation.
REFERENCES:
patent: 1991343 (1935-02-01), Ball
patent: 2065628 (1936-12-01), Taylor et al.
patent: 2895747 (1959-07-01), Bland et al.
patent: 3032310 (1962-05-01), Hansen
patent: 3866952 (1975-02-01), Inoue et al.
patent: 3881756 (1975-05-01), Takatori et al.
Freeman John W.
Jones Thomas M.
Reagan Harold D.
ACF Industries Incorporated
Crane Daniel C.
Lanham C.W.
Riddle Eugene N.
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