Bizarre Patents
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:
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.
Estimated Patent Expiration Date:
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.AbstractA 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
| InventorsApplicationNo. 07/030061 filed on 03/25/1987US 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 waferExaminersPrimary: Cherry, Johnny D.Attorney, Agent or FirmUS Patent References954927, 982661, 1302028, 1337427, 1743212, 3335727International ClassesB25B 11/00 (20060101)H01L 21/67 (20060101) H01L 21/683 (20060101) Foreign Application Priority Data1986-08-01 JP |
