A surgical instrument, comprising: a housing; an energizable member movable relative to the housing between a storage position and a deployed position; and a deployment mechanism (80,380) coupled to the housing and the energizable member and configured to selectively move the energizable member between the storage position and the deployed position, characterized in that the deployment mechanism includes: a one-way rotatable member (87,387) coupled to the housing and rotatable relative to the housing about at least one pivot; a linkage (88,388) having a first end (89a,389a) and a second end (89b, 389b), the first end of the linkage coupled to the one-way rotatable member at a position offset from the at least one pivot and the second end of the linkage coupled to the energizable member such that a revolution of the one-way rotatable member about the at least one pivot moves the energizable member from the storage position to the deployed condition and back to the storage position; and an actuator (82,382) disposed on the housing and coupled to the one-way rotatable member, the actuator selectively actuatable from an un-actuated state to an actuated state, wherein each actuation of the actuator effects a partial revolution of the one-way rotatable member such that each actuation of the actuator moves the energizable member from one of the storage position or the retracted position to the other of the storage position or the retracted position. a housing; an energizable member movable relative to the housing between a storage position and a deployed position; and a deployment mechanism (80,380) coupled to the housing and the energizable member and configured to selectively move the energizable member between the storage position and the deployed position, characterized in that the deployment mechanism includes: a one-way rotatable member (87,387) coupled to the housing and rotatable relative to the housing about at least one pivot; a linkage (88,388) having a first end (89a,389a) and a second end (89b, 389b), the first end of the linkage coupled to the one-way rotatable member at a position offset from the at least one pivot and the second end of the linkage coupled to the energizable member such that a revolution of the one-way rotatable member about the at least one pivot moves the energizable member from the storage position to the deployed condition and back to the storage position; and an actuator (82,382) disposed on the housing and coupled to the one-way rotatable member, the actuator selectively actuatable from an un-actuated state to an actuated state, wherein each actuation of the actuator effects a partial revolution of the one-way rotatable member such that each actuation of the actuator moves the energizable member from one of the storage position or the retracted position to the other of the storage position or the retracted position. a one-way rotatable member (87,387) coupled to the housing and rotatable relative to the housing about at least one pivot; a linkage (88,388) having a first end (89a,389a) and a second end (89b, 389b), the first end of the linkage coupled to the one-way rotatable member at a position offset from the at least one pivot and the second end of the linkage coupled to the energizable member such that a revolution of the one-way rotatable member about the at least one pivot moves the energizable member from the storage position to the deployed condition and back to the storage position; and an actuator (82,382) disposed on the housing and coupled to the one-way rotatable member, the actuator selectively actuatable from an un-actuated state to an actuated state, wherein each actuation of the actuator effects a partial revolution of the one-way rotatable member such that each actuation of the actuator moves the energizable member from one of the storage position or the retracted position to the other of the storage position or the retracted position.