Da D Le, 811 Apache Ln, Long Beach, CA 90745

4624662, Nov 25, 1986

Apr 13, 1983

6/483207

Da H. Le - Pasadena CA

Transamerica Delaval Inc. - Lawrenceville NJ

A61M 500
F16K 5100

604249

A catheter is flushed intermittently at a flushing flow rate higher than a seeping flow rate with the aid of a valve connected to a supply of flushing liquid. The valve has an operator of an elastic material providing an integral elastic sleeve about a valve stem, for biasing the operator to a rest position before and after manual actuation to a depressed position for a temporary opening of the valve. The operator is protected against accidental depression at all points thereof by a shield completely surrounding and surpassing the operator, so that a human finger has to penetrate into the shield for engagement of the operator prior to depression from its rest position against the bias of the elastic sleeve for an opening of the valve. The seeping flow rate is realized with a capillary passage which may extend along either a valve body or a valve seat in the valve and which is laterally bounded either by the valve seat or the valve body when the valve body is seated in the valve seat. The capillary passage is intermittently opened between continual flushings at the seeping flow rate and is then flushed at the higher flushing flow rate simultaneously with the catheter.

4505157, Mar 19, 1985

Aug 5, 1983

6/520680

Da Hong Le - Pasadena CA

Transamerica DeLaval Inc. - Lawrenceville NJ

A61B 502
G01L 1900

73756

Methods and apparatus for interconnecting a transducer body with a fluid-receiving transducer dome provide the transducer body with a radial shoulder, where an annular tightening member, rotatable relative to the transducer body, is also provided. An axial bias between the tightening member and the radial shoulder resiliently restrains the tightening member and the transducer body against movement away from each other. A groove for receiving a fastening member projecting either from the tightening member or the dome is provided at the dome or the tightening member. This groove is delimited with a stepped rigid tongue for retaining the fastening member therein. The dome and the transducer body are biased into fluid-tight engagement with the axial bias acting between the radial shoulder and the annular tightening member and acting on the dome through the projecting fastening member and rigid tongue.