Anti-surge valve for hydraulic locking device

Brakes – Internal-resistance motion retarder – With means for locking parts together temporarily

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137498, 137504, 137853, 138 43, 138 45, 138 46, F16F 934

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active

044807295

ABSTRACT:
An anti-surge valve for installation in a cylindrical chamber permits a fluid to flow at low velocity into and out of a port that opens into the cylindrical chamber and is located on the concave wall of the cylindrical chamber, the valve preventing a high velocity flow of the fluid from the cylindrical chamber into the port. The valve includes a sealing tube that is positioned within the cylindrical chamber in juxtaposition with the port and coaxial with but spaced radially inward from the portions of the concave wall that surround the port. The sealing tube is maintained in this position by spacers surrounding the sealing tube and extending radially outwardly to the inner surface of the cylindrical chamber. The anti-surge valve is a unitary structure molded of rubber. The sealing tube is sufficiently stiff that at low flow velocities the sealing tube is not drawn toward the concave wall sufficiently to interfere with low velocity flow, but the sealing tube is sufficiently flexible that at high flow velocities, the sealing tube is drawn against the portion of the concave wall that surrounds the port, thereby sealing the port and preventing high velocity flow of the fluid from the cylindrical chamber into the port.

REFERENCES:
patent: 2917075 (1959-12-01), Terry
patent: 2939487 (1960-06-01), Fraser et al.
patent: 2950733 (1960-08-01), Perkins
patent: 3477464 (1969-11-01), Ryan
patent: 3828651 (1974-08-01), Dorner et al.
patent: 3860098 (1975-01-01), Porter et al.

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