Pressing head structure for testing key durability

Details Pressing head structure for testing key durability Pressing head structure for testing key durability

2011-03-01

2011-03-01

Noori, Max (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

C073S760000, C073S825000

Reexamination Certificate

active

07895901

ABSTRACT:
A pressing head structure (100) for testing key durability includes a pressing mechanism (10), a rubber head (40), a connecting mechanism (20) and a balance mechanism (30). The pressing mechanism includes a sliding rod (12) and a first spring (16). The first spring is placed over the sliding rod. The connecting mechanism connects the pressing mechanism and the rubber head. The balance mechanism is rotatably fixed to the connecting mechanism. The balance mechanism engages with the pressing mechanism. When the sliding rod moves down, the first spring and the balance mechanism together supply an unaltered resultant resistance in the moving direction of the sliding rod.

REFERENCES:
patent: 3597981 (1971-08-01), Wakabayashi et al.
patent: 6314825 (2001-11-01), Fan
patent: 6330514 (2001-12-01), Kuo
patent: 6681347 (2004-01-01), Chen et al.
patent: 7798013 (2010-09-01), Chiu et al.
patent: 7800383 (2010-09-01), Liu et al.

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