| 摘要 |
917,559. Injection needles. FENWAL LABORATORIES Inc. May 8, 1959 [March 9, 1959], No. 15955/59. Class 81 (2). [Also in Group XXVIII] A hypodermic needle 20 is inserted into the open end of a flexible tube through which fluid is administered and a length of the tube is contracted on, and bonded to, the needle to form a joint therewith. The needle may be of P.V.C. or of stainless steel coated with an anticoagulant and may be coated with a cement adhesive film before introduction into the tube 10 which is of rubber or plastic. The cement may be omitted when both the needle and tube are of plastic. The bond may be formed by heating the assembly or by inserting an elastic sleeve 30 over the tube to contract it. The pointed end 21 of the needle is protected by a rubber sheath 40 provided with a rib 44a engaging in a recess in the sleeve 30. Alternatively, a short length of tubing is inserted over the pointed end with one of its ends flattened and sealed and the other engaging an uncontracted end portion of the tube 10. |
