US Patent No: 4,181,025

Number of patents in Portfolio can not be more than 2000

Means for adjusting the area of an orifice in a vibration system

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Abstract

A spherical shaped plate and an orifice opening are oriented such that the edge of the plate can span and cover part of the orifice opening. Stops are provided to prevent a full 360.degree. rotation. The plate shape and wedge opening can be configured such that, as the angular position of the plate changes, the orifice area changes according to the predetermined relationship. The plate and the opening may be enclosed in a gas tight housing, with a stepping motor exterior to the housing coupled via a shaft passing through the housing to the plate. The plate angular position versus orifice area relationship is determined in combination with a desired linear angular position versus gas pressure curve, for use in copending patent application Ser. No. 897,821, filed herewith entitled "Quasi-Random Pneumatic Vibration Facility and Automatic Frequency Modulating System Therefor" by Henry T. Abstein, Jr., Dennis B. Page, James M. Kallis, Charles F. Talbott, Jr. and Richard L. Baker.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HUGHES AIRCRAFT COMPANYLOS ANGELES, CA2781

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Abstein, Jr Henry T Roseburg, OR 2 29
Page, Dennis B Redondo Beach, CA 2 29

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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL TRUSTEE (5)
5,589,637 Exciter-mounting for shaker table 12 1994
5,517,857 Apparatus for raising shaker table within thermal chamber 22 1994
5,675,098 Apparatus and method for thermal and vibrational stress screening 23 1995
5,744,724 Random vibration generating table 12 1997
5,836,202 Exciter mounting for random vibration generating table 11 1997
 
VENTUREDYNE, LTD. (2)
5,804,732 Vibrator-driven table apparatus 11 1997
7,752,914 Monitoring of independent vibrators 0 2007
 
RAYTHEON COMPANY (1)
5,154,567 Low frequency vibration assembly 15 1991
 
SCREENING SYSTEMS, INC. (1)
5,435,533 Adjustable clamping fixture for vibrating various sized circuit boards 8 1993