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US 5,751,668 AGranted
Push button and method for assembling such push button
AssigneeETA SA Fabriques d'Ebauches
InventorDavid Eray
Life of this patent
Estimating the term…
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AssigneeETA SA Fabriques d'Ebauches
InventorDavid Eray
Estimating the term…
Push button comprising a stem (10), provided with a head (5) able to be manipulated and sliding into an opening (2) provided in the middle part (3) of a timepiece, and stopping means preventing the removal of said stem (10), wherein the stem (10) comprises, on the head side (5), a main cylindrical body (11) extended by a shank (13) separated from the latter by a groove (12) intended to receive an O-ring sealing gasket (30), said shank (13) having at its end an axial stud (17) ending in an annular rim (18), and the stopping means comprise a sleeve (20) inserted between the wall of the opening (2) and the shank (13), partially blocked by a ring (22) of greater external diameter than that of the opening (2) and of substantially equal aperture to the diameter of the stud (17), said (20) sleeve compressing the O-ring sealing gasket (30) and being fixed to the shank (13) by riveting of the annular rim (18).
A push button for a timepiece comprising a stem, provided with a head able to be manipulated and sliding into a cylindrical opening provided in the middle part of said timepiece, and stopping means preventing the extraction of said stem, wherein the stem comprises, on the head side, a main cylindrical body extended by a shank separated from the latter by a groove intended to receive an O-ring sealing gasket, said shank having at its end an annular recess forming an axial stud ending in an annular rim, and wherein the stopping means comprise a sleeve inserted, between the wall of the opening and the shank, of substantially equal length to the shank, partially blocked by a ring of greater external diameter than that of the opening and of substantially equal aperture to the diameter of the stud, said sleeve compressing the O-ring sealing gasket and being fixed to the shank by riveting of the annular rim against the ring of the sleeve.
A push button according to claim l, wherein the internal surface of the sleeve comprises a groove into which a lip of the shank snap fits to allow positioning of the sleeve prior to riveting.
Dependencies are inferred from the claim text.