Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1975-05-05
1976-10-12
Weston, Caleb
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
128349B, 156244, 156245, 156293, 264291, B29C 2700, B32B 3130, A61M 2500
Patent
active
039856011
ABSTRACT:
A method is disclosed for producing an inflatable balloon catheter having an inflatable catheter tip attached to a double lumen catheter shaft to form a smooth, continuous outer surface at the outer juncture of the tip and shaft. The tip is molded and comprises a hollow, thin-walled, cylindrical balloon section that has at least one open end. Mating die members are provided to define a cylindrical mold cavity having inside diameter substantially equal to the inside diameter of the balloon section. The catheter shaft is extruded to have initial outside diameter substantially equal to the outside diameter of the balloon section and, while in a partially cured state, a leading portion of the extruded shaft is stretched to locally reduce its outside diameter. The stretched portion is clamped between the die members in the mold cavity to form a shoulder at a transition between this leading portion and the remainder of the shaft. The entire shaft is then cured. The now permanently reduced diameter shaft portion is stripped from the mold cavity and the balloon section of the catheter tip is installed thereon with the end of the cylindrical balloon section wall adjacent the open end in abutting relation to the shoulder.
REFERENCES:
patent: 3435826 (1969-04-01), Fogarty
patent: 3832253 (1974-08-01), Di Palma et al.
patent: 3833003 (1974-09-01), Taricco
patent: 3833004 (1974-09-01), Vazquez et al.
Quantum, Inc.
Weston Caleb
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