Abstract: Methods and devices are provided for retracting a cutting assembly in the event of a failure on a motorized electrosurgical device. For example, a surgical device is provided with a handle that has an elongate shaft assembly with first and second jaws for engaging tissue. A cutting assembly is included in the surgical device that cuts tissue engaged between the first and second jaws. The surgical device also includes a drive shaft that extends from the handle through the elongate shaft and moves the cutting assembly relative to the first and second jaws, and a motorized gear assembly that causes movement of the drive shaft. In an exemplary embodiment, the elongate shaft assembly is detachable from the handle such that, when detached, the drive shaft can be manually retracted relative to the elongate shaft to retract the cutting assembly from to the first and second jaws.

Abstract: Methods and devices are provided for retracting a cutting assembly in the event of a failure on a motorized electrosurgical device. A surgical device is provided that includes a handle portion with an elongate shaft extending distally therefrom. The elongate shaft has first and second jaws at a distal end, and the jaws are configured to engage tissue. The surgical device also has a cutting assembly configured to cut tissue engaged between the first and second jaws. A drive shaft extends from the handle of the surgical device through the elongate shaft and is coupled to the cutting assembly for moving the cutting assembly. The surgical device has a motorized gear assembly with at least one motor driven gear that is configured to move the drive shaft. The surgical device also has a bailout assembly that is configured to manually move the drive shaft.

Abstract: A control module advantageously reduces cost and enhances reliability, design flexibility, ease of assembly, and performance of a flywheel operated hand tool. The control module includes a thin film printed circuit with non-contact speed sensing of a flywheel to more accurately set the target speed and control transfer kinetic energy thereof to a fastener, achieving a desired depth regardless of variations in component performance and battery voltage. The printed circuit also includes long service life thin film switches for responding to trigger and safety inputs. Furthermore, the control module responds to a user speed selection and to preset speed selection ranges to reconfigure the controls as appropriate to constraints of a fastener drive assembly and to user preferences.

Abstract: The present invention teaches a unique drive mechanism for use in a hand held fastener driving tool. The driving mechanism comprises a pair of opposing cams coaxially positioned upon a common shaft. One of the cams is motor driven and rotatable about the common shaft but not axially translatable while the other cam is axially translatable but non-rotatable. Rotation of the rotatable cam by the motor causes the non-rotatable axially translatable cam to compress a compressible spring assembly, storing potential energy therein. Simultaneously, a driver activation cable, wrapped about the rotatable cam's periphery, unwraps thereby raising a fastener driver to its driving configuration. Upon release of the rotatable cam from the motor drive, the potential energy stored within the spring assembly causes reverse rotation of the rotatable cam thereby rewinding the drive cable about the rotatable cam's periphery and driving the fastener driver, whereby the driver drives a fastener into a workpiece.

Abstract: A control module advantageously reduces cost and enhances reliability, design flexibility, ease of assembly, and performance of a flywheel operated hand tool. The control module includes a thin film printed circuit with non-contact speed sensing of a flywheel to more accurately set the target speed and control transfer kinetic energy thereof to a fastener, achieving a desired depth regardless of variations in component performance and battery voltage. The printed circuit also includes long service life thin film switches for responding to trigger and safety inputs. Furthermore, the control module responds to a user speed selection and to preset speed selection ranges to reconfigure the controls as appropriate to constraints of a fastener drive assembly and to user preferences.

Abstract: A control module advantageously reduces cost and enhances reliability, design flexibility, ease of assembly, and performance of a flywheel operated hand tool. The control module includes a thin film printed circuit with non-contact speed sensing of a flywheel to more accurately set the target speed and control transfer kinetic energy thereof to a fastener, achieving a desired depth regardless of variations in component performance and battery voltage. The printed circuit also includes long service life thin film switches for responding to trigger and safety inputs. Furthermore, the control module responds to a user speed selection and to preset speed selection ranges to reconfigure the controls as appropriate to constraints of a fastener drive assembly and to user preferences.