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US 12,590,625 B2Granted
Linear actuators with anti-backdrive mechanisms
AssigneeBrunswick Corporation
InventorsPerin E. Truax, Craig A. Ulman
Life of this patent
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Abstract
An electric linear actuator comprises a housing extending along an axis, a spindle in the housing and extending along the axis, a motor coupled to and configured to rotate the spindle, and a rod coaxially coupled to the spindle and axially movable with respect to the housing in response to rotation of the spindle, the rod comprising a groove. A resilient member is configured to be received in the groove to prevent back-drive of the motor when the rod is subject to a load.
Claims20
An electric linear actuator comprising:
- a housing extending along an axis;
- a spindle in the housing and extending along the axis;
- a motor coupled to and configured to rotate the spindle;
- a rod coaxially coupled to the spindle and axially movable with respect to the housing in response to rotation of the spindle, the rod comprising a groove;
- and
- a resilient member configured to be received in the groove to prevent back-drive of the motor when the rod is subject to a load,
- wherein the resilient member is axially fixed relative to the housing.
4 more elements
A linear actuator comprising:
- a housing extending along an axis;
- a resilient member;
- and
- a rod axially movable so as to extend and retract with respect to the housing, the rod comprising a groove,
- wherein the rod further comprises a lip that radially outwardly flexes the resilient member as the rod moves in a first axial direction toward a first rod position in which the resilient member is received in the groove,
- wherein the lip has a radially outwardly sloping surface that wedges the resilient member radially outwardly as the rod moves in the first axial direction,
- wherein the resilient member is configured to be received in the groove when the rod is in a first rod position and is configured to prevent inadvertent extension of the rod from the housing when the rod is subject to a load below a predetermined threshold, and
- wherein the resilient member is configured to outwardly flex out of the groove when the rod is subject to a second load exceeding the predetermined threshold as the rod is moved from the first rod position in a second axial direction toward a second rod position.
5 more elements
A linear actuator comprising:
- a housing extending along an axis;
- a rod axially movable so as to extend and retract with respect to the housing, the rod comprising a groove;
- and
- a resilient member configured to be received in the groove to prevent inadvertent extension of the rod from the housing when the rod is subject to a load,
- wherein the resilient member is axially fixed relative to the housing.
2 more elements
Dependencies are inferred from the claim text.