An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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AbstractA failsafe device for raising/lowering articles includes a frame and a fastener for attaching the frame to a ceiling or wall to elevated an article above the floor. A pulley or sheave is mounted on the frame about a substantially horizontal axis when the frame is mounted on the ceiling or wall. A cable is entrained over the pulley and has a substantially vertical lifting cable portion attachable to the article to the lifted and a substantially vertical pulling cable portion arranged to be pulled downwardly by a user to elevate the article and raised upwardly to lower the article. A cam is mounted on the frame on one side of the pulling cable portion and has a cable engaging surface. The cam is movable between a cable releasing position and a cable locking position, the cable engaging surface including a first engaging portion normally spaced a fixed distance from the pulling cable portion to form a clearance gap in the cable releasing position and a second engaging portion bridging the clearance gap a distance equal to least the fixed distance for substantially instantaneously arresting the cable and preventing movement of the pulling cable portion upwardly toward the pulley and corresponding downward movement of the article. A pusher is mounted on the frame for always applying a force on the pulling cable portion in the direction of the cam for urging it across the clearance gap into contact with the first engaging portion only when tension in the pulling cable portion is decreased relative to the tension in the lifting cable portion, continued contact between the pulling cable portion causing the second engaging portion to bridge the clearance gap as it moves from the releasing to the locking positions until a tension is applied by the user to the pulling cable portion with a force that substantially corresponds to the weight of the article. | InventorApplicationNo. 09846831 filed on 05/01/2001US Classes:254/391, With mechanism for retarding or preventing cable movement or element rotation254/405, With block for element and portion thereof repositionable for insertion or removal of cable or for exposure of element248/125.2, Bracket moved by mechanical operator (e.g., spring, threaded shaft, pulley and rope)248/321, Clutch type248/322, Hook type24/134KBCam engaging or disengagingField of Search254/390, Including rotatable, cable contacting, pulley wheel element254/391, With mechanism for retarding or preventing cable movement or element rotation254/405, With block for element and portion thereof repositionable for insertion or removal of cable or for exposure of element254/406, Portion revolves about axis of rotation of element254/408, With block for element having stationary portion adapted to coact with element to grip cable254/409, With portable block for element and hand manipulated means for removably fastening block to support or load254/410, Fastening means remotely operable or breakaway type254/413, With means for affixing element to support base and allowing relative movement therebetween254/417, Having cable contacting portion revolving around another component of device248/125.2, Bracket moved by mechanical operator (e.g., spring, threaded shaft, pulley and rope)248/320, Releasable for lowering248/321, Clutch type248/332, Pulley brackets24/134KB, Cam engaging or disengaging24/131C, Cord runs through center of coil24/129A, Slack adjuster24/115A, Bendable, ductible24/115F, Safety release24/115H, Loop, adjustable24/130, Wedge slot24/129B, Sheet material24/128Knot engagingExaminersPrimary: Marcelo, Emmanuel M.US Patent References152635, 669443, 674673, 723231, 803274, 817039, 826727, 829320, 896646, 916091, 1055503, 1107934, 1132571, 1167295, 1211856, 1366212, 1383665, 1452338, 1686678, 1735691, 2200896, 2419249, 2592696, 2631803, 2867785, 3203746, 3215385, 4007808, Line securing deviceIssued on: 02/15/1977 Inventor: Conley , et al.4057211, Safety system for overhead support of weighted articles Issued on: 11/08/1977 Inventor: Moore4178661, Self-cleating rope holder Issued on: 12/18/1979 Inventor: Klein4280435, One piece anchor for adjustably tethering a rope suspended boat fender Issued on: 07/28/1981 Inventor: Loomis4289292, Variably supported container Issued on: 09/15/1981 Inventor: Kunjumon4422556, Receptacles for overhead storage systems Issued on: 12/27/1983 Inventor: Moore4502668, Removable double-action rope grip Issued on: 03/05/1985 Inventor: Dodge, Jr.4542884, Removable double action rope grip Issued on: 09/24/1985 Inventor: Dodge, Jr.4934660, Device for raising and lowering loads Issued on: 06/19/1990 Inventor: Nelson5067621, Multi-level suspended garment holder Issued on: 11/26/1991 Inventor: Alexander5526944, Balanced inventory/facing construction Issued on: 06/18/1996 Inventor: Merl5615865, Automatically engaging and disengaging pawl and pulley lifting mechanism Issued on: 04/01/1997 Inventor: Fountain5642871, Suspendable magnetic soap holder assembly Issued on: 07/01/1997 Inventor: Repert, et al.5738339, Rope traction device with connected locking units Issued on: 04/14/1998 Inventor: Kuryu5816636Self-releasing log choker Issued on: 10/06/1998 Inventor: Gibson, et al. International ClassB66D 384 |