Piston rod assembly including an injection bonded piston head and fabrication method
This patent describes a piston rod assembly comprising a piston rod and a piston head. The rod extends coaxially beyond the piston head. The piston head has an internal annular groove defining with an external surface of the rod an annual space filled with adhesive to provide a bonded joint between the piston head and rod. The piston head engages the rod at the ends of the groove to seal off the ends of the groove. The piston head includes a radially enlarged center dam portion and a pair of reduced diameter end portions extending coaxially from opposite sides of the center dam portion. The center dam portion has an axial thickness, and the internal groove having an axial length greater than the axial thickness of the center dam portion. The annular groove extends axially beyond the opposite sides of the center dam portion for a substantial portion of the length of the reduced diameter end portions.
- Assignee:
- Pneumo Abex Corp., Boston, MA
- Patent Number(s):
- US 4773282
- OSTI ID:
- 6672138
- Resource Relation:
- Patent File Date: Filed date 6 Apr 1987
- Country of Publication:
- United States
- Language:
- English
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