1
Keith B Hardin, John T Fessler, Donald R Bush, James J Booth: Spread spectrum clock generator and associated method. Lexmark International, Bell Seltzer Park & Gibson, January 30, 1996: US05488627 (116 worldwide citation)

A clock circuit includes an oscillator for generating a reference frequency signal, and a spread spectrum clock generator cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental frequency and reduced amplitude EMI spectral components at harmonics of ...


2
Donald R Bush, Gary J Reichl: Wafer handler. American Telephone and Telegraph Company AT&T Technologies, James H Fox, September 27, 1988: US04773687 (35 worldwide citation)

A wafer handling technique allows for picking up a wafer from its front side. One or more vacuum ports pull the periphery of the wafer into contact with a ledge raised from a broad surface, providing a friction force that prevents lateral movement of the wafer. A port in the broad surface of the han ...


3
James L Gossett, William V Fitzgerald, Raymond W Micheel, Donald Sanders, Donald R Bush, Wade J Helfer: Control valve having ā€œCā€ seal. Marshall Gerstein & Borun, March 23, 2010: US07681594 (4 worldwide citation)

A control valve having a shiftable valve plug includes a valve body having an inlet, an outlet, a flow passage extending between the inlet and the outlet, and defining a longitudinal axis, a generally cylindrical valve cage disposed within the valve body and sized to receive the valve plug, with the ...


4
Michael W McCarty, Donald R Bush, Daniel M Adams, Frederick W Catron, Michael D Frohwein: Seal assembly for a fluid pressure control device. Fisher Controls International, Marshall Gerstein & Borun, August 25, 2009: US07578314 (3 worldwide citation)

A seal assembly for a fluid pressure control device includes a guide element having a scaling surface and a first guide surface. A throttling element assembly includes a throttling element positionable within a fluid flow path, the assembly defines a mating surface adapted to seal with the sealing s ...


5
Donald R Bush, Michel K Lovell, Richard B Eberhart: Split packing follower for use with valves. Fisher Controls International, Hanley Flight & Zimmerman, December 4, 2007: US07303179 (1 worldwide citation)

Split packing followers for use with valves are disclosed. A disclosed packing follower includes a first member having a first portion of a flange and a first portion of a curved wall extending substantially perpendiculary from the first portion of the flange to define a first portion of a cylindric ...


6
Michael W McCarty, Donald R Bush, Daniel M Adams, Frederick W Catron, Michael D Frohwein: Seal assembly for a fluid pressure control device. Marshall Gerstein & Borun, October 8, 2013: US08550117

A seal assembly for a fluid pressure control device includes a guide element having a sealing surface and a first guide surface. A throttling element assembly includes a throttling element positionable within a fluid flow path, the assembly defines a mating surface adapted to seal with the sealing s ...


7
Michael W McCarty, Donald R Bush, Daniel M Adams, Frederick W Catron, Michael D Frohwein: Seal Assembly for a Fluid Pressure Control Device. Marshall Gerstein & Borun, March 22, 2007: US20070062587-A1

A seal assembly for a fluid pressure control device includes a guide element having a scaling surface and a first guide surface. A throttling element assembly includes a throttling element positionable within a fluid flow path, the assembly defines a mating surface adapted to seal with the sealing s ...


8
James L Gossett, William V Fitzgerald, Raymond W Micheel, Donald Sanders, Donald R Bush, Wade J Helfer: Control Valve Having "C" Seal. Fisher Controls International, Marshall Gerstein & Borun, October 30, 2008: US20080264504-A1

A control valve having a shiftable valve plug includes a valve body having an inlet, an outlet, a flow passage extending between the inlet and the outlet, and defining a longitudinal axis, a generally cylindrical valve cage disposed within the valve body and sized to receive the valve plug, with the ...


9
Donald R Bush, Michel K Lovell, Richard B Eberhart: Split packing follower for use with valves. Hanley Flight & Zimmerman, September 21, 2006: US20060208211-A1

Split packing followers for use with valves are disclosed. A disclosed packing follower includes a first member having a first portion of a flange and a first portion of a curved wall extending substantially perpendicularly from the first portion of the flange to define a first portion of a cylindri ...


10
Michael W McCarty, Donald R Bush, Daniel M Adams, Frederick W Catron, Michael D Frohwein: Seal assembly for a fluid pressure control device. Marshall Gerstein & Borun, May 11, 2006: US20060096643-A1

A seal assembly for a fluid pressure control device includes a guide element having a sealing surface and a first guide surface. A throttling element assembly includes a throttling element positionable within a fluid flow path, the assembly defining a mating surface adapted to seal with the guide el ...