Position device in gantry type of construction

Details Position device in gantry type of construction Position device in gantry type of construction

2007-05-11

2011-10-18

Benson, Walter (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

C318S565000, C318S687000, C052S651050, C212S324000, C409S202000, C409S212000, C702S095000

Reexamination Certificate

active

08040099

ABSTRACT:
In a positioning device in gantry type of construction, due to a special arrangement of the position-measuring devices used for the positioning, errors due to thermal expansion of the positioning device may be avoided to a great extent. In particular, attention is given to the advantageous placement of fixed point of a scale relative to a straightness track of a further scale.

REFERENCES:
patent: 4587622 (1986-05-01), Herzog
patent: 6949733 (2005-09-01), Widdowson et al.
patent: 7610162 (2009-10-01), Grupp
patent: 2004/0178327 (2004-09-01), Widdowson et al.
patent: 2009/0287444 (2009-11-01), Ishikawa
patent: 2009/0326849 (2009-12-01), MacManus
patent: 42 12 970 (1993-10-01), None
patent: 10 2005 023 984 (2006-11-01), None
patent: 0 082 441 (1983-06-01), None
International Search Report, PCT/EP2007/004175, dated Sep. 14, 2007.

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