Acoustics – Diaphragm – With direct mechanical connection to drive unit
Reexamination Certificate
2007-08-21
2007-08-21
Barrera, Ramon M. (Department: 2832)
Acoustics
Diaphragm
With direct mechanical connection to drive unit
C335S285000, C335S289000
Reexamination Certificate
active
10948451
ABSTRACT:
An electromagnetic holding brake comprising a switchable electromagnet (4) for holding a movable sheet (6) in a predetermined position, wherein said brake further comprises a second fixated sheet (5) which is arranged substantially parallel to the movable sheet (6), such that said movable sheet (6) is clamped between the electromagnet (4) and the second sheet (5) when the current is switched on.
REFERENCES:
patent: 3463921 (1969-08-01), Warden
patent: 4022301 (1977-05-01), Hansen
patent: 4777768 (1988-10-01), Audi et al.
patent: 7007779 (2006-03-01), Johansson et al.
patent: 84959 (1920-10-01), None
patent: 2 002 072 (1979-02-01), None
Johansson Conny
Slettenmark Bruno
Barrera Ramon M.
Siemens Aktiengesellschaft
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