Handling: hand and hoist-line implements – Grapple – Slideable jaws
Patent
1998-06-08
1999-08-03
Kramer, Dean
Handling: hand and hoist-line implements
Grapple
Slideable jaws
294 88, 414941, B25J 1510
Patent
active
059315180
ABSTRACT:
A gripper for wafer-shaped articles (silicon wafers) has several radially justable gripping claws (2). Gripping claws (2) are loaded by springs so that when an article is held they tightly adjoin its outer edge. To move gripping claws (2) to the outside, there is a spreading device (20) with conical spreading body (21). In addition, gripping claws (2) are coupled to one another such that they cannot move to the inside independently of one another and it is ensured that individual gripping claws (2) cannot move farther to the inside than other griping claws (2). This is achieved for example by conical spreading body (21) being loaded by spring (26) which keeps it continually against parts connected to gripping claws (2), for example, rollers (18) provided on their guide bodies (12). This reliably prevents individual gripping claws (2) from moving radially to the inside farther than other gripping claws (2). Thus the article is held by the gripper in a defined position to it.
REFERENCES:
patent: 3170322 (1965-02-01), Cavanaugh
patent: 4453757 (1984-06-01), Soraoka
patent: 4705313 (1987-11-01), Radice
patent: 4861086 (1989-08-01), Toral
patent: 4903717 (1990-02-01), Sumnitsch
patent: 5125708 (1992-06-01), Borcea et al.
patent: 5513668 (1996-05-01), Sumnitsch
patent: 5520501 (1996-05-01), Kouno et al.
patent: 5762391 (1998-06-01), Sumnitsch
patent: 5803521 (1998-09-01), Zejda et al.
Kramer Dean
SEZ Semiconductor- Equipment Zubehor fur die Halbleiterfertigung
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