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:
Jan. 24, 1989
Filed:
Dec. 15, 1987
Ronald A Midgley, Derby, GB;
ROLLS-ROYCE plc, London, GB;
Abstract
A turbopropeller, or turbofan, gas turbine engine comprising a single spool core engine arranged to drive a propeller, or a fan, via gear means may be provided with a starter motor, and a clutch means. The clutch means disengages the propeller, or fan, from the gear means and core engine when the core engine is at rest or running below a predetermined speed to allow easy starting of the core engine by the starter motor. The clutch means engages the propeller, or fan, with the gear means and core engine when the core engine is running at or above the predetermined speed. An axially moveable piston may be provided to brake the propeller when the clutch means has disengaged the propeller from the core engine.