Document Type and Number:
Japanese Patent JPH0232498
Kind Code:
B2
Abstract:
A hollow cam shaft of the type wherein lubricating oil is distributed to the cam portions includes a rod member positioned inside the shaft pipe member and spaced from the inner pipe surface by shaft end members and guide strips to form a reduced, annular volume to be filled with oil during engine start-up. The method of making the hollow cam shaft includes forming the rod member from a resinous material by injection molding, using a removable mold positioned in the pipe through-hole, and, in a preferred embodiment, flowing the resin through the mold cavity and into a recess located in the distal shaft end member, which recess has an enlarged portion for capturing the hardened resin rod end and facilitating mold removal.
Inventors:
UMEBA GENKICHI
URANO SHIGERU
HIRAKAWA OSAMU
TAKEGUCHI SHUNSUKE
URANO SHIGERU
HIRAKAWA OSAMU
TAKEGUCHI SHUNSUKE
Application Number:
JP703284A
Publication Date:
July 20, 1990
Filing Date:
January 20, 1984
Export Citation:
Assignee:
NIPPON PISTON RING CO LTD
International Classes:
F01L1/04; F01M9/10; F01M11/02; F16H53/02
Next Patent: JPH0232499