Composite and self-lubricating bushing
AssigneeDanly Corporation
InventorJames C. Danly, Sr.
Life of this patent
Estimating the term…
Abstract
A composite and self-lubricating bushing comprises a monolithic steel body having a machined internal cylindrical surface and a porous bearing layer applied to the surface. The porous bearing layer is formed by compacting and sintering a particulate bearing material. The steel body may also include a cavity for storing lubricant and at least one passageway extending between the cavity and the internal cylindrical surface. The bushing may be fabricated by positioning the steel body concentrically over an elastomeric plug, charging the annular cavity between the body and the plug with a sinterable particulate, expanding the elastomeric plug diametrically to compact the particulate, removing the plug and heating the bearing body and compacted particulate.
Claims13
A composite bushing for use in a die set, comprising:
- a monolithic steel body having a machined internal cylindrical surface;
- and a porous bearing layer on said internal cylindrical surface, said bearing layer including a particulate material which is first compacted and then sintered in situ on said internal cylindrical surface and having a thickness of no greater than approximately 0.120 inches.
Dependencies are inferred from the claim text.