Apparatus to increase a force of an actuator having an override apparatus are described herein. An example fluid control system includes a first fluid control apparatus to fluidly couple a control fluid supply source to a control actuator via a first passageway. The control fluid supply source provides a control fluid to move a control …

Legal parties

Inventors (applicants): David Anthony Arnold
Assignees (initial): Fisher Controls International, LLC (Marshalltown, US)
Agents: Hanley, Flight & Zimmerman, LLC. (attorney)

The application was examined by Thomas E Lazo (USPTO dept. 3745)


  • 1. A fluid control system for use with valves, comprising: …
  • 2. A fluid control system of claim 1 , further comprising a third fluid passageway …
  • 3. A fluid control system of claim 1 , wherein the first fluid control apparatus …

Cited documents


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Brief Description of the Drawings

FIGS. 1A , 1B, and 1C illustrate a known control valve and actuator having an air-based fail-safe system. FIG. 2 illustrates an example actuator apparatus described herein. …


Field of the Disclosure

The present disclosure relates generally to actuators and, more particularly, to apparatus to increase a force of an actuator having an override …

Detailed Description

The example systems and apparatus described herein increase a force (e.g., a seat load or opening force) imparted by a control actuator on, for example, a flow control member of a valve …

More details about Apparatus to Increase a Force of an Actuator Having an Override Apparatus

Miscellaneous patent data

The invention is named Apparatus to Increase a Force of an Actuator Having an Override Apparatus, the primary classification Electrically operated (275) (361) has been designated to the document, the applicant's state - IA, city - Marshalltown, the known applicant's name is David Anthony Arnold, the assignee location is Marshalltown (US); its organization is Fisher Controls International, LLC, the claim number 1 is selected as exemplary, the grant date is Oct. 8, 2013 (publication date), the application publication date is Dec. 28, 2009, the grant number is 08549984 (publication number), includes the following drawings: Cross-sectional view of the example, Apparatus to Increase a Force, example actuator apparatus described herein, 1B, and 1C illustrate a known, the inventor's state is IA, city - Marshalltown, the inventor's name is David Anthony Arnold, developed by David Anthony Arnold, the assignee is categorized as a United States company, similar documents are classified under stable intermediate position, e.g. with snap action, a throttle in the form of a helical channel, Additional inlet path opened in response to position, using a motor, Oscillating working member, motor chamber pressure reaction on valve, Excess-flow valves, Single Chamber Formed by Mutually Relatively Movable Cylinder, Sleeve and Piston, Oscillating cylinder, weight-loaded, particularly claims a fluid control system for use with valves, comprising…, the application was examined by Thomas E Lazo (3745 USPTO department), 7 figures are supplied with the description, the term of the grant was extended by 943 days, the patent is illustrated by 6 drawings, the application number is 12/648,135 (U.S.), the known agent - Hanley, Flight & Zimmerman, LLC., 20 claims comprise the protection scope.

Invention classification information

The invention is classified under Fluid and non-fluid actuators, Electrically operated (275) (361), the fluid acting on a piston. The designated search classifications include Fluid and non-fluid actuators, Electrically operated (275) (361).

Patent details
Publication number 08549984
Publication date Oct. 8, 2013
Kind code B2
Application number 12/648,135
Application date Dec. 28, 2009
Application type U
Application series code 12
Extension term 943
National classification 91/459
Total number of claims 20
Exemplary claims 1
Number of drawings 6
Number of figures 7
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