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US 2012/0055293 A1Published application
Seized Fastener Removal Tool and Set
AssigneeLisle Corporation
InventorsVincent J. Urick, Scotty R. Kurtz
Life of this patent
Estimating the term…
Abstract
A tool may loosen seized bolts by sending shock waves into the bolt shank and thread areas via axial blows with a pneumatic hammer on the center of the bolt head prior to removal. The tool may allow impacts to be centered on the bolt head without damaging the bolt head or without worry of the bit jumping off the bolt. The tool may be comprised of a separate driver and one or more sockets.
Claims13
A tool for engaging and removing a seized fastener comprising:
- a driver having a substantially longitudinal axis with a drive end for engaging a head of a fastener and a driven end for driven impact engagement, said drive end including a generally, substantially coaxial collar with a collar surface generally transverse to the axis, said drive end further including a substantially coaxial, integral, impact rod projecting from said collar surface and terminating with an impact face, said impact rod extending a first axial dimension from said collar surface to said impact face;
- and
- a separate socket having an axial throughbore for receipt of said impact rod of said driver, said socket including first and second opposite end faces located at opposite ends of the throughbore, said end faces spaced a second axial dimension and generally transverse to said throughbore axis, said throughbore including a counterbore at said second face end with an axial counterbore depth surface generally transverse to the axis and a cross sectional configuration for receiving the head of a fastener whereby the distance between the first end and the counterbore depth surface defines a third axial dimension, said third axial dimension less than said first axial dimension of said impact rod enabling said impact rod of said driver to be insertable into said socket throughbore for reciprocal movement and engagement of said face of said impact rod with the head of a fastener positioned in said socket counterbore.
A method for engaging and removing a seized fastener comprising the steps of:
- (a) providing a tool which includes a driver having a substantially longitudinal axis with a drive end for engaging a head of a fastener and a driven end for impact engagement, said drive end including a generally, substantially coaxial collar with a collar surface generally transverse to the axis, said drive end further including a substantially coaxial, integral, impact rod projecting from said collar surface and terminating with a face generally transverse to the axis, said impact rod extending a first axial dimension from said collar surface to said face, and a set of separate sockets, each socket having first and second opposite generally transverse end surfaces with an axial throughbore for receipt of said impact rod of said driver and including a counterbore at said second end surface with a cross sectional configuration for compatibly engaging the head of a fastener, said axial throughbore having a second axial dimension between the first end surface and a counterbore depth surface said less than said first axial dimension of said impact rod, whereby said impact rod of said driver is insertable into said socket throughbore for reciprocal movement and engagement of said face of said impact rod with the head of a fastener positioned in said socket counterbore and wherein the counterbore configuration of each socket member is distinctly sized for a distinctly headed fastener;
- (b) placing one of said set of socket members on said impact rod by inserting said rod into said socket throughbore with the counterbore axially spaced from the coaxial collar surface;
- (c) fitting said counterbore of said selected socket member on a head of a fastener compatible therewith;
- and
- (d) impacting said impact rod face on said fastener head to loosen said fastener.
2 more elements
Dependencies are inferred from the claim text.