Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Insulated handle – Knob-type handle
Reexamination Certificate
2007-02-06
2007-02-06
Mah, Chuck Y. (Department: 3677)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Insulated handle
Knob-type handle
C016S443000, C016S429000, C074S553000
Reexamination Certificate
active
10829657
ABSTRACT:
A knob includes a hub to be fixed in a seat open at the front of an electrical household appliance, a grip, which can slide axially, against the action of an elastic element, on a first end of the hub. Between the grip and the hub there is defined a closed chamber having a variable volume that is a function of the axial position of the grip on the hub. A sliding seal is provided for sealing the closed chamber. A calibrated restriction connects the inside of the chamber with the external environment in such a way as to bring about a negative pressure in the chamber as a result of the axial movement of the grip away from the hub.
REFERENCES:
patent: 3779268 (1973-12-01), Conkling
patent: 4275764 (1981-06-01), Baret
patent: 4779305 (1988-10-01), Gorsek
patent: 5048365 (1991-09-01), Webb
patent: 5364065 (1994-11-01), Tauati
patent: 5551124 (1996-09-01), Zeringue
patent: 5671904 (1997-09-01), Minutillo
patent: 6112619 (2000-09-01), Campbell
patent: 3910967 (1990-10-01), None
patent: 199 51 422 (2001-05-01), None
patent: 2003257289 (2003-09-01), None
ITW Industrial Components S.R.L.
Kyle Michael J.
Lowe Hauptman & Berner LLP
Mah Chuck Y.
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