Fluid handling – Systems – Sequentially progressive opening or closing of plural valves
Patent
1975-02-24
1977-10-18
Nilson, Robert G.
Fluid handling
Systems
Sequentially progressive opening or closing of plural valves
123 97B, 188273, 251 60, 251 634, 251 636, 251214, 251285, 251337, F16K 302
Patent
active
040541568
ABSTRACT:
An exhaust brake valve assembly structurally arranged to provide reliable operation with relatively quick response. The assembly includes a sliding gate valve member driven by a power actuator through a lost motion connection which generates a desirable impact force on the gate to overcome static frictional forces. The lost motion connection cooperates with a relief port in the gate to relieve peak pressure forces on the gate just prior to opening movement to additionally improve opening reliability and response. Still further, the actuator includes a spring return arrangement in which the force rate adjacent the closed gate position is substantially greater than the force rate at the open position so that adequate reserve return force is developed for opening while only a minimal spring force resists piston movement in the initial opening movement. A quick release valve is provided on the actuator to rapidly exhaust fluid from the working chamber of the actuator to develop a high level of kinetic energy during the lost motion period. The actuator is protected from extreme temperature by a heat barrier plate interposed between the valve housing and actuator. A piston rod of the actuator is sealed by a radially floating seal and includes a reduced diameter portion and opposed shoulders for simple connection with the valve gate.
REFERENCES:
patent: 997038 (1911-07-01), Brummer
patent: 1348604 (1920-08-01), Titus
patent: 1412473 (1922-04-01), Lane
patent: 1506012 (1924-08-01), Lewis
patent: 1727591 (1929-09-01), Fridstein et al.
patent: 2062126 (1936-11-01), Gibson
patent: 2241324 (1941-05-01), Selby
patent: 2709897 (1955-06-01), Millikan
patent: 2800112 (1957-07-01), Williams
patent: 2873761 (1959-02-01), Tailleferre
patent: 2997851 (1961-08-01), Trubert
patent: 3036807 (1962-05-01), Lucky et al.
patent: 3136332 (1964-06-01), Nixon
patent: 3221770 (1965-12-01), Faisandier
patent: 3333814 (1967-08-01), Sargent
patent: 3420262 (1969-01-01), O'Neill
patent: 3621878 (1971-11-01), Smith
patent: 3851658 (1974-12-01), Bunyard
patent: 3895648 (1975-07-01), Stoll et al.
Nilson Robert G.
The Weatherhead Company
LandOfFree
Exhaust brake valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Exhaust brake valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exhaust brake valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1443096