Hollow balance shaft
AssigneeSimpson Industries, Inc.
InventorsRonald S. Friedman, William C. Sisco
Life of this patent
Estimating the term…
Abstract
A balance shaft for an automobile engine is disclosed. The balance shaft has a hollow tubular body and a pair of end plug members permanently secured thereto, as by welding. Notches or bob weights either in line or 180.degree. out of phase are provided in the two end plug members. The balance shaft is rotated at twice the crankshaft speed in order to balance second order forces.
Claims43
A balance shaft for an automobile engine comprising:
- a hollow tubular member having two ends;
- a first plug member secured by welding to one end of said tubular member;
- and
- a second plug member secured by welding to the other end of said tubular member;
- said first plug member having an air vent therein.
A method for forming a balance shaft for an automobile engine having a crankshaft, comprising
- providing an elongated hollow tubular member with two ends,
- attaching a first plug member to a first end of said tubular member,
- attaching a second plug member to the second end of said tubular member,
- forming a first notch in said first plug member, and forming a second notch in said second plug member,
- whereby said balance shaft can be rotated at twice the speed of said crankshaft and thereby balance second order vibration forces of said engine.
A balance shaft for an automobile engine comprising:
- a hollow tubular member having two ends;
- a first plug member secured to one end of said tubular member by welding;
- a second plug member secured to the other end of said tubular member by welding;
- a first annular groove being provided at the joint between said tubular member and said first plug member,
- a second annular groove being provided at the joint between said tubular member and said second plug member,
- a first weld positioned in said first annular groove, and
- a second weld positioned in said second annular groove.
A balance shaft for an automobile engine comprising
- a hollow tubular member having two ends,
- a first plug member secured to one end of said tubular member, and
- a second plug member secured to the other end of said tubular member,
- said first plug member having a first notch in it and said second plug member having a second notch in it, said first and second notches being positioned substantially 180.degree. opposed to one another.
A balance shaft for an automobile engine comprising
- a hollow tubular member having two ends,
- a first plug member secured to one end of said tubular member, and
- a second plug member secured to the other end of said tubular member,
- said first plug member having a first protruding bob weight and said second plug member having a second protruding bob weight, said first and second bob weights being positioned substantially 180.degree. opposed to one another.
Dependencies are inferred from the claim text.