The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 1993
Filed:
Aug. 05, 1991
Robert R Tessier, White Bear Lake, MN (US);
Dennis H Jensen, Blaine, MN (US);
Jeffrey J Hertz, Blaine, MN (US);
Aetrium, Inc., North St. Paul, MN (US);
Abstract
An invertor (10) is disclosed including first and second probes (12, 14) which are pivotably mounted to a U-shaped housing (20) and to a block (18) which is reciprocally mounted to the housing (20) by guide shafts (38). The block (18) is reciprocated by a rotary actuator (42) between a first position where the probes (12, 14) are in a parallel relation and a second position where the probes (12, 14) are in line. The suction pin (80) of the first probe (12) may be extended to attach to the first surface (96) of the chip (98) and then retracted. The probes (12, 14) may then be moved to their in line relation where the chip (98) may be passed from the first probe (12) to the second probe (14) but attaching the opposing surface (100) of the chip (98) to the suction pin (80) of the second probe (14). After moving the probes ( 12, 14) to their parallel relation, the suction pin (80) of the second probe (14) may be extended to place and release the chip (98). In the most preferred form, probes (12, 14) include a housing (72) divided into upper and lower chambers (74, 76) by an insert (78) which also reciprocally receives the suction pin (80). The suction pin (80) includes a piston (86) to define a pressure chamber (88) with the insert (78). Chambers (74, 88) may be subjected to fluid pressure, vacuum, or vented to attach the suction pin (80) to the chip (98) and/or to reciprocate the suction pin (80) within the housing (72).