-
公开(公告)号：US10669869B1
公开(公告)日：2020-06-02
申请号：US15600252
申请日：2017-05-19
Applicant: Amazon Technologies, Inc.
Inventor： Bradley David Urban , Dominic Timothy Shiosaki , Ricky Dean Welsh
Abstract: Aerial vehicles may be equipped with propellers having pivotable blades that are configured to rotate or fold when the propellers are not rotating under power. A pivotable blade may rotate about an axis of a propeller with respect to a hub in the presence of wind flow until the pivotable blade is coaligned with a fixed blade, in a direction opposite to the wind flow. A pivotable blade may also fold over a hub of a propeller in the presence of wind flow, with the pivotable blade and a fixed blade being oriented in directions opposite to the wind flow. A center of mass of the pivotable blade may be caused to be on the same side of an axis as a center of mass of a fixed blade, even where the axis is not normal to the wind flow, thereby reducing an amount of drag generated by the propeller.
-
42.发明申请公开(公告)号：US20190161168A1
公开(公告)日：2019-05-30
申请号：US16264153
申请日：2019-01-31
Applicant: Amazon Technologies, Inc.
Inventor： Nicholas Hampel Roberts , Dominic Timothy Shiosaki , Ricky Dean Welsh
Abstract: Multiple propeller blades may be joined by tip connectors to form a closed propeller apparatus. The tip connectors may create continuous structure between adjacent tips of a first propeller and a second propeller. Use of the tip connectors may reduce vortices created near the tips of the propeller blades, which cause drag and slow the rotation of the propeller blades. The tip connectors may also reduce noise caused by rotation of propeller blades. Further, the tip connectors reduce or eliminate deflection of the propeller blades by creating a support structure to counteract forces that would otherwise cause deflection of the propeller blades, thereby improving propeller blade loading. In some embodiments, the tip connectors may be formed of a malleable material and/or include one or more joints that enable at least one of the propellers to modify a pitch of blades of the propeller.
-
公开(公告)号：US20190135412A1
公开(公告)日：2019-05-09
申请号：US16236247
申请日：2018-12-28
Applicant: Amazon Technologies, Inc.
Inventor： Dominic Timothy Shiosaki , Ricky Dean Welsh
Abstract: Aerial vehicles may include propulsion units having motors with drive shafts that may be aligned at a variety of orientations, propellers with variable pitch blades, and common operators for aligning the drive shafts at one or more orientations and for varying the pitch angles of the blades. The common operators may include plate elements to which a propeller hub is rotatably joined, and which may be supported by one or more linear actuators that may extend or retract to vary both the orientations of the drive shafts and the pitch angles of the blades. Operating the motors and propellers at varying speeds, gimbal angles or pitch angles enables the motors to generate forces in any number of directions and at any magnitudes. Attributes of the propulsion units may be selected in order to shape or control the noise generated thereby.
-
Patent Agency Ranking
44.发明授权公开(公告)号：US10232933B2
公开(公告)日：2019-03-19
申请号：US14973610
申请日：2015-12-17
Applicant: Amazon Technologies, Inc.
Inventor： Nicholas Hampel Roberts , Dominic Timothy Shiosaki , Ricky Dean Welsh
Abstract: Multiple propeller blades may be joined by tip connectors to form a closed propeller apparatus. The tip connectors may create continuous structure between adjacent tips of a first propeller and a second propeller. Use of the tip connectors may reduce vortices created near the tips of the propeller blades, which cause drag and slow the rotation of the propeller blades. The tip connectors may also reduce noise caused by rotation of propeller blades. Further, the tip connectors reduce or eliminate deflection of the propeller blades by creating a support structure to counteract forces that would otherwise cause deflection of the propeller blades, thereby improving propeller blade loading. In some embodiments, the tip connectors may be formed of a malleable material and/or include one or more joints that enable at least one of the propellers to modify a pitch of blades of the propeller.
-
公开(公告)号：US10086933B2
公开(公告)日：2018-10-02
申请号：US14973618
申请日：2015-12-17
Applicant: Amazon Technologies, Inc.
Inventor： Nicholas Hampel Roberts , Dominic Timothy Shiosaki , Ricky Dean Welsh
Abstract: Multiple motors may drive (rotate) a single shaft coupled to a propeller. The motors may be selected such that a first motor is capable of rotating the drive shaft in an event of a failure of a second motor coupled to the drive shaft. A one-way clutch bearing, or similar device, may interface between a motor and the drive shaft to enable free rotation of the drive shaft in an event of the motor becoming inoperable, such as the motor freezing or locking in a position due to failure caused by overheating or caused by other conditions or events. Use of the second motor may secure a position of the drive shaft which may support the propeller in radial eccentric loading.
-
46.发明申请公开(公告)号：US20180229833A1
公开(公告)日：2018-08-16
申请号：US15435044
申请日：2017-02-16
Applicant: Amazon Technologies, Inc.
Inventor： Gur Kimchi , Dominic Timothy Shiosaki , Ricky Dean Welsh
IPC: B64C25/26 , B64C39/02 , B64C25/52 , B64C25/20 , B64D1/10 , B64C17/02 , B64C15/12 , B64C27/52 , B64C27/08 , B64D45/00 , B64D31/06
Abstract: Aerial vehicles may be configured to control their attitudes by changing one or more physical attributes. For example, an aerial vehicle may be outfitted with propulsion motors having repositionable mounts by which the motors may be rotated about one or more axes, in order to redirect forces generated by the motors during operation. An aerial vehicle may also be outfitted with one or more other movable objects such as landing gear, antenna and/or engaged payloads, and one or more of such objects may be translated in one or more directions in order to adjust a center of gravity of the aerial vehicle. By varying angles by which forces are supplied to the aerial vehicle, or locations of the center of gravity of the aerial vehicle, a desired attitude of the aerial vehicle may be maintained irrespective of velocity, altitude and/or forces of thrust, lift, weight or drag acting upon the aerial vehicle.
-
公开(公告)号：US20170174337A1
公开(公告)日：2017-06-22
申请号：US14973618
申请日：2015-12-17
Applicant: Amazon Technologies, Inc.
Inventor： Nicholas Hampel Roberts , Dominic Timothy Shiosaki , Ricky Dean Welsh
CPC classification number: B64C27/14 , B64C11/18 , B64C11/48 , B64C27/46 , B64C39/024 , B64C2201/024 , B64C2201/027 , B64C2201/042 , B64C2201/108 , B64C2201/165 , B64D27/26 , B64D2027/026
Abstract: Multiple motors may drive (rotate) a single shaft coupled to a propeller. The motors may be selected such that a first motor is capable of rotating the drive shaft in an event of a failure of a second motor coupled to the drive shaft. A one-way clutch bearing, or similar device, may interface between a motor and the drive shaft to enable free rotation of the drive shaft in an event of the motor becoming inoperable, such as the motor freezing or locking in a position due to failure caused by overheating or caused by other conditions or events. Use of the second motor may secure a position of the drive shaft which may support the propeller in radial eccentric loading.
-
48.发明申请公开(公告)号：US20170174323A1
公开(公告)日：2017-06-22
申请号：US14973610
申请日：2015-12-17
Applicant: Amazon Technologies, Inc.
Inventor： Nicholas Hampel Roberts , Dominic Timothy Shiosaki , Ricky Dean Welsh
CPC classification number: B64C11/48 , B64C11/18 , B64C11/306 , B64C27/10 , B64C27/14 , B64C27/463 , B64C27/473 , B64C39/024 , B64C2201/024 , B64C2201/027 , B64C2201/108 , Y02E10/721
Abstract: Multiple propeller blades may be joined by tip connectors to form a closed propeller apparatus. The tip connectors may create continuous structure between adjacent tips of a first propeller and a second propeller. Use of the tip connectors may reduce vortices created near the tips of the propeller blades, which cause drag and slow the rotation of the propeller blades. The tip connectors may also reduce noise caused by rotation of propeller blades. Further, the tip connectors reduce or eliminate deflection of the propeller blades by creating a support structure to counteract forces that would otherwise cause deflection of the propeller blades, thereby improving propeller blade loading. In some embodiments, the tip connectors may be formed of a malleable material and/or include one or more joints that enable at least one of the propellers to modify a pitch of blades of the propeller.
-
-
-
-
-
-
-
Search Results
48
records
(took 0.025 seconds)
