The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 01, 1977
Filed:
Sep. 03, 1975
Applicant:
Inventors:
Alexander Scott, Bristol, EN;
Peter Eric Peck, Bristol, EN;
Assignee:
Rolls-Royce (1971) Limited, , EN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02K / ; F02C / ;
U.S. Cl.
CPC ...
6022 / ; 60268 ; 60 3 / ; 417315 ; 417408 ; 415 61 ;
Abstract
A ducted fan gas turbine engine comprises a pair of turbines in flow series which are contra-rotating and which drive shafts which in turn drive into an epicyclic gear. The output from the epicyclic gear drives a fan which normally provides forward thrust from the engine. The fan can be made to rotate in the opposite direction to provide reverse thrust by varying the relative speeds of rotation of the two turbines by bleeding working fluid from between them.
Scott, Alexander. (1977). Differentially geared reversible fan for ducted fan gas turbine engines (U.S. Patent No. 4005575). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4005575
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile