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AssigneeHubitools S.A.
InventorYannick Dudot
Estimating the term…
The invention involves the extraction process of a glow plug pencil (23) or a broken pencil (23) which is stuck in a cylinder head (13) housing (11) of a glow plug engine comprising a lower (19) and upper (17) part, so that the upper part (17) forms a shoulder (21) with the lower part (19), the pencil (23) being stuck in the lower part (19). The process is remarkable in that it includes a step (a) for drilling a bore in the pencil (23) according to the longitudinal direction of the latter which is performed with the use of a drill bit (1) comprising a drilling part (5) with flutes (7) and a shank (3) respectively having a diameter smaller and greater than the lower part diameter (19) of the housing (11) so that the shank (3) forms a shoulder (9) with the drilling part (5), and in that step a) for drilling the bore includes the drilling of the pencil (23) until the said shoulder (9) of the drill bit (1) is positioned to a stop against the shoulder (21) of the housing (11).
A tool set to extract a glow plug pencil stuck in a glow plug housing, the glow plug housing having a lower part and an upper part, the lower part having a first diameter smaller than a second diameter of the upper part, the glow plug pencil stuck in the lower part, the tool set comprising:
Dependencies are inferred from the claim text.