MOTION DECOY WITH BIAXIAL WING BEAT
A waterfowl motion decoy having a hollow body shaped in the form of a waterfowl and at least one wing member shaped in the form of a waterfowl wing is provided. The decoy comprises a gear train and a swivel joint. The gear train is coupled to a drive shaft driven by a force. The swivel joint includes a wing adapter configured to be couple to a wing member. The swivel joint is coupled to the body of the decoy and the gear train so that, when the gear train is driven by the force, the swivel joint pivots the wing adapter about a pivot axis and rotate the wing adapter about a rotation axis. The pivot axis and the rotation axis are not parallel to each other.
1 . A waterfowl motion decoy comprising:
a housing configured to look like a body of the waterfowl;
two wings configured to look like wings of the waterfowl; and
two swivel joints movably coupled to the housing, wherein each swivel joint comprises:
a pivot arm comprising:
a wing adapter at a first end of the pivot arm configured to be coupled to one of the two wings and
a bearing mount,
a rotating shaft having a first rotating bearing and a second rotating bearing at opposite ends of the rotating shaft,
a swivel bearing connecting the pivot arm to the rotating shaft comprising:
an outer race fixed to the bearing mount of the pivot arm so that the outer race and the pivot arm move as one piece,
an inner race coupled to the outer race so that the inner race can freely spin inside the outer race and
a mounting hub fixed to the inner race and the rotating shaft extends through the mounting hub so that the inner race, the mounting hub and the rotating shaft move as one piece and
wherein each of the two swivel joints is configured to move one of the two wings back and forth in a linear path and rotate the wing back and forth when the wing reaches a top and a bottom of the linear path.
2 . The waterfowl motion decoy of claim 1 , wherein the pivot arm is constrained from co-rotating with the rotating shaft by a horizontal edge of an opening in the housing.
3 . The waterfowl motion decoy of claim 1 , further comprising:
two counter weights with each counter weight shaped like a “C” and with a socket in a center area of the counter weight; and
wherein the pivot arm further comprises a ball connection at a second end coupled to the socket of the counter weight thereby constraining the pivot arm from co-rotating with the rotating shaft.
4 . The waterfowl motion decoy of claim 3 , wherein each counter weight has two bearings at opposite ends of the counter weight.
5 . The waterfowl motion decoy of claim 1 , wherein each swivel joint is coupled to the housing and a gear train so that, when the gear train is driven by a force, each swivel joint pivots the wing adapter about a pivot axis and rotates the wing adapter about a rotation axis.
6 . The waterfowl motion decoy of claim 5 , wherein the pivot axis and the rotation axis intersect at an angle between 30 and 60 degrees.
7 . The waterfowl motion decoy of claim 5 , wherein the pivot axis and the rotation axis intersect at an angle of about 45 degrees.
8 . A waterfowl motion decoy comprising:
a housing shaped in the form of a waterfowl;
two wings configured to look like wings of the waterfowl;
a gear train coupled to a drive shaft driven by a force; and
two swivel joints, wherein each swivel joint comprises a wing adapter configured to be coupled to one of the two wings and each swivel joint is coupled to the housing and the gear train so that, when the gear train is driven by the force, each swivel joint pivots the wing adapter about a pivot axis and rotates the wing adapter about a rotation axis.
9 . The waterfowl motion decoy of claim 8 , wherein the pivot axis and the rotation axis intersect at an angle between 30 and 60 degrees.
10 . The waterfowl motion decoy of claim 8 , wherein the pivot axis and the rotation axis intersect at an angle of about 45 degrees.
11 . The waterfowl motion decoy of claim 8 , wherein each swivel joint further comprises:
a pivot arm comprising:
the wing adapter at a first end of the pivot arm configured to be coupled to one of the two wings and
a bearing mount,
a rotating shaft having a first rotating bearing and a second rotating bearing at opposite ends of the rotating shaft,
a swivel bearing connecting the pivot arm to the rotating shaft comprising:
an outer race fixed to the bearing mount of the pivot arm so that the outer race and the pivot arm move as one piece,
an inner race coupled to the outer race so that the inner race can freely spin inside the outer race and
a mounting hub fixed to the inner race and the rotating shaft extends through the mounting hub so that the inner race, the mounting hub and the rotating shaft move as one piece and
wherein each of the two swivel joints is configured to move one of the two wings, back and forth in a linear path and rotate the wing back and forth when the wing reaches a top and a bottom of the linear path.
12 . The waterfowl motion decoy of claim 11 , wherein the pivot arm is constrained from co-rotating with the rotating shaft by a horizontal edge of an opening in the housing.
13 . The waterfowl motion decoy of claim 11 , further comprising:
two counter weights with each counter weight shaped like a “C” and with a socket in a center area of the counter weight; and
wherein the pivot arm further comprises a ball connection at a second end coupled to the socket of the counter weight thereby constraining the pivot arm from co-rotating with the rotating shaft.
14 . The waterfowl motion decoy of claim 13 , wherein each counter weight has two bearings at opposite ends of the counter weight.
15 . A waterfowl motion decoy comprising:
a housing configured to look like a body of a waterfowl;
two wings configured to look like wings of the waterfowl; and
a chassis mounted in the housing configured to move each of the two wings back and forth in a linear path and rotate each wing back and forth when the wing reaches a top and a bottom of the linear path.
16 . The waterfowl motion decoy of claim 15 , further comprising:
two swivel joints coupled inside the chassis, wherein each swivel joint comprises:
a pivot arm comprising:
a wing adapter at a first end of the pivot arm configured to be coupled to one of the two wings and
a bearing mount,
a rotating shaft having a first rotating bearing and a second rotating bearing at opposite ends of the rotating shaft,
a swivel bearing connecting the pivot arm to the rotating shaft comprising:
an outer race fixed to the bearing mount of the pivot arm so that the outer race and the pivot arm move as one piece,
an inner race coupled to the outer race so that the inner race can freely spin inside the outer race and
a mounting hub fixed to the inner race and the rotating shaft extends through the mounting hub so that the inner race, the mounting hub and the rotating shaft move as one piece.
17 . The waterfowl motion decoy of claim 16 , wherein the pivot arm is constrained from co-rotating with the rotating shaft by a horizontal edge of an opening in the housing.
18 . The waterfowl motion decoy of claim 16 , further comprising:
two counter weights with each counter weight shaped like a “C” and with a socket in a center area of the counter weight; and
wherein the pivot arm further comprises a ball connection at a second end coupled to the socket of the counter weight thereby constraining the pivot arm from co-rotating with the rotating shaft.
19 . The waterfowl motion decoy of claim 18 , wherein each counter weight has two bearings at opposite ends of the counter weight coupled to the chassis.
20 . The waterfowl motion decoy of claim 15 , wherein the chassis is configured to move the two wings as mirror images about a head-to-toe centerline of the housing.