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:
Sep. 07, 1993
Filed:
Nov. 18, 1991
Myles A Rohrlick, Oceanside, CA (US);
Blaine K Rawdon, Rancho Palos Verdes, CA (US);
McDonnell Douglas Corporation, Long Beach, CA (US);
Abstract
A ramp system in a first embodiment incorporates a fore and an aft ramp section interconnected by a spindle which permits both pitch and roll movement of the aft section relative to the fore section. The fore section is hingedly connected to an aircraft structure at an opening thereof so that the fore section is capable of pitch movement relative to the aircraft. A set of hydraulic actuators provide controlled movement to the sections and additionally secure the sections in their desired positions. A set of rollers and curved tracks on adjoining portions of the sections both provide secure interconnection of the sections and prevent yaw movement of the aft section relative to the fore section. Rotation of the aft section relative to the fore section allows quick and simple disconnection and removal of the aft section and thereby provides interchangability with alternate aft sections adapted to provide the aircraft with alternate functional capabilities. The second embodiment is essentially similar to the first embodiment except that it utilizes a ramp which is directly connected to an aircraft structure via the spindle and set of rollers and tracks so that the ramp is removeable from the aircraft structure and interchangeable with other ramps.