Self-retaining bolt
OwnerFriedrich Thommesinventor
Life of this patent
Estimating the term…
Abstract
A self retaining fastener which comprises a threaded bolt with an hexagonal head and threaded shaft with a longitudinal groove formed therein. An arcuate spring member is secured in the groove and protrudes slightly outward from the threaded shaft of the bolt to provide frictional force against the inner surface of a bore. A further embodiment of the invention provides a threaded shaft cut into segments by one or more diametrical slots. The segmented portion of the shaft is biased outward to a diameter slightly greater than that of the unsegmented portion, providing resilient frictional force when inserted into an appropriately sized bore.
Claims2
A self retaining fastener comprising:
- a longitudinal member having a length, a longitudinal axis and a diameter,
- said longitudinal member having means for engaging a tool at one end,
- a slot extending parallel with said longitudinal axis,
- said slot extending along substantially the entire length of said longitudinal member,
- a resilient member inserted into said slot,
- said resilient member having a first portion extending into said slot and a second portion projecting out of said slot, and
- wherein said first portion of said resilient member is straight and said second portion of said resilient member is curved away from said slot.
Dependencies are inferred from the claim text.