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Patent No. 6681419

Forehead support apparatusĀ 

A forehead support apparatus for resting a standing users forehead against a wall above a bathroom commode or urinal or beneath a showerhead.

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US Patent 4767142 - Forceps for semiconductor silicon wafer

US Patent Issued on August 30, 1988
Estimated Patent Expiration Date: Icon_subject March 25, 2007Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

A vacuum-forceps is disclosed. A valve chamber is provided between a first suction passage communicating with an adsorptive member and a second suction passage connected through a suction tube to a vacuum source. A valve member linked to an operating push button is accomodated in the valve chamber. The adsorptive member is rotatable and swayable relative to a forceps body with the aid of a spherical member. A suction tube is connected through a double-coupling to the forceps body. A bypass is provided between the valve chamber and the first suction passage. A semiconductor silicon wafer is adsorbed on an adsorptive plate provided at the tip end of the adsorptive member by actuating the push button and is then moved to a desired position.

Other References

  • IBM Technical Disclosure Bulletin, vol. 24, No. 6, Nov. 1981, "Vacuum Wafer Pick-Up Tip", by Ferrentino et al

Inventors

Application

No. 07/030061 filed on 03/25/1987

US Classes:

294/64.1, VACUUM285/261, BALL AND SOCKET285/390, SCREW285/397, INTERNAL SLEEVE403/299, THREAD ADAPTOR403/90, Ball and socket414/941Includes means for gripping wafer

Examiners

Primary: Cherry, Johnny D.

Attorney, Agent or Firm

US Patent References

954927, 982661, 1302028, 1337427, 1743212, 3335727

International Classes

B25B 11/00 (20060101)
H01L 21/67 (20060101)
H01L 21/683 (20060101)

Foreign Application Priority Data

1986-08-01 JP

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