Patents by Inventor Ronald E Crabtree

Ronald E Crabtree has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Two spool air cycle machine having concentric shafts
    Patent number: 6151909
    Abstract: A two-spool air cycle machine includes a high pressure cooling turbine section; a low pressure cooling turbine section; and first and second shafts that are concentrically arranged and that are independently rotatable with respect to one another. A turbine wheel of the high pressure turbine section is secured to the first shaft, and a turbine wheel of the second turbine section is secured to the second shaft. Such an air cycle machine may be used a variety of different aircraft environmental control systems.
    Type: Grant
    Filed: March 6, 1999
    Date of Patent: November 28, 2000
    Assignee: AlliedSignal Inc.
    Inventors: Michael E. Carter, Ronald E. Crabtree, Terrence P. Emerson, Arturo Moreno, Terry Morris, Raymond Rapozo, Marshall Saville
  • Single package cascaded turbine environmental control system
    Patent number: 6070418
    Abstract: An environmental control system includes a single heat exchanger, a single water separator and two air cycle machines on separate spools. Cooling turbines of the air cycle machines are cascaded. Air flows through both air cycle machines during normal operation of the environmental control system. If one of the air cycle machines fails, air can be bypassed around the failed air cycle machine. Cascading allows water separation to be performed by a mid-pressure water separator located between the air cycle machines.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: June 6, 2000
    Assignee: AlliedSignal Inc.
    Inventors: Ronald E Crabtree, Peter C. Collins, Stanley C. Pollitt, Roger R. Sanger, Michel A. Jonqueres, Thomas J. Kazan