Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Cleaning or steam sterilizing
Patent
1979-04-16
1981-08-04
Schwadron, Martin P.
Fluid handling
With cleaner, lubrication added to fluid or liquid sealing...
Cleaning or steam sterilizing
137315, 166320, 175 38, 251 63, 251324, 251333, F16K 5100
Patent
active
042816785
ABSTRACT:
Mud choke apparatus is disclosed, and the preferred embodiment has the form of a hollow, tubular body receiving a mud flow introduced from a lateral port, the flow being directed through an axial passage and past a valve seat. The valve seat is a replaceable, hardened metal liner and is formed with a gradual taper so that the mud flows from the large end through the tapered, smaller end. Thereafter, it flows out of the body through an axial opening. The flow of mud is throttled by a tapered, hardened plug serving as a valve element which is received into the valve seat. A hydraulic cylinder and piston with a connecting rod move the plug. The plug has a surrounding, perpendicular shoulder which seals and seats against a shoulder on the insert to fully close the throttling valve apparatus. Flow is choked by inserting the tapered plug with controlled clearance into the tapered valve seat.
REFERENCES:
patent: 271073 (1883-01-01), Jenkins
patent: 1202044 (1916-10-01), Fisher
patent: 2004423 (1935-06-01), Warren
patent: 2634754 (1953-04-01), Rahn
patent: 2717004 (1955-09-01), Page
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patent: 3064675 (1962-11-01), Johnson et al.
patent: 3598145 (1971-08-01), Wolfson
patent: 3620251 (1971-11-01), Bowen
patent: 3703908 (1972-11-01), Tellier
Schwadron Martin P.
Walton G. L.
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