Martin E Johnson

US Patent:

58398511, Nov 24, 1998

Filed:

Apr 22, 1997

Appl. No.:

8/838014

Inventors:

Lynn P. Norfolk - Edgewater MD
David Charles Peterson - Edgewater MD
Ronald Price Ranere - Chesapeake Beach MD
Russell V. Welton - Grasonville MD
Martin Johnson - Crofton MD
John David Augustine - Laurel MD

Assignee:

Norfolk Fabrication, Inc. - Mayo MD

International Classification:

B63C 306
B63C 102

US Classification:

405 3

Abstract:

A lift is provided for a personal watercraft and includes two relatively elongated channel members each of a generally C-shaped transverse cross-section. A carriage carrying a platform upon which the personal watercraft can be supported is mounted for sliding movement between the elongated channel members through a cable, winch, reversible electric drive motor and associated gears and pulleys. When the carriage is located within the upper channel member, the latter, the platform and the personal watercraft can be swung about a vertical axes to rotate the personal watercraft between two different positions 180. degree. removed.

US Patent:

55427774, Aug 6, 1996

Filed:

Jul 12, 1994

Appl. No.:

8/274063

Inventors:

Martin E. Johnson - Baltimore MD

Assignee:

Martin Marietta Corporation - Bethesda MD

International Classification:

F16B 4302

US Classification:

403389

Abstract:

A vehicle includes a composite panel 10 with nonparallel face sheets 12,14, and a reinforcing core 16, preferably honeycomb, lying therebetween. A fastener 30 lies in an aperture 22 of the panel, and includes a socket 32 with a flange 40 bearing against first face sheet 12, and a body 46 defining a through aperture 54 and a spherical cavity 50. Fastener 30 also includes a swivel 34, with a ball-shaped knob 62 rigidly coupled to a post 64. Knob 62 fits into cavity 50 and can swivel. Post 64 is internally and externally threaded. An internally threaded spacer 36 is screwed onto the exterior threads 65 of post 64, to adjust the length of the fastener to the thickness of panel 10. Either post 64 or spacer 36 includes an additional fastening arrangement. In a particular embodiment of the invention, the additional fastening means of the spacer is a flange, and in another embodiment, it is a threaded portion of the bore of the post or of the spacer.