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US 10,245,094 B2Granted
Ultra high torque device
AssigneeECA Medical Instruments
InventorsJohn Nino, David Ivinson
Life of this patent
Estimating the term…
Abstract
A torque-limiting device may include a shaft extending axially through upper and lower shanks and a spring to connect to a nut. The upper and lower shanks may be under a force from the spring and further configured to selectively engage within a predetermined torque limit and disengage at above the predetermined torque limit. Accordingly, the shaft may receive torque up to the predetermined limit as provided by a user operating a handle of the torque-limiting device. The torque-limiting device may be disposable, reusable, economical, and have high torque capabilities.
Claims7
A torque-limiting driver comprising:
- a body having a handle and a hollow cylindrical portion, the body further comprising a circumferential flange extending radially inward within the hollow cylindrical portion;
- an upper cylindrical shank comprising a plastic material or a composite including plastic;
- a lower cylindrical shank comprising a plastic material or a composite including plastic and having a socket;
- a nut;
- a spring between the upper cylindrical shank and the nut, wherein the spring is configured to apply a force across the upper cylindrical shank and the lower cylindrical shank;
- a shaft having a workpiece-engaging tip and a square drive connection engaged within the square drive socket of the lower cylindrical shank, the shaft extending axially through the lower cylindrical shank, the upper cylindrical shank, and the spring and connected to the nut, and the square drive connection placed at a medial segment of the shaft;
- and,
- wherein the upper cylindrical shank and the lower cylindrical shank engage for relative rotation, and wherein the upper cylindrical shank and the lower cylindrical shank disengage when a predetermined torque limit is exceeded;
- and,
- wherein the lower cylindrical shank and the upper cylindrical shank each comprise a circumferential rim extending radially outward at the ends where the lower cylindrical shank and the upper cylindrical shank engage with each other, with the circumferential flange of the body disposed between the circumferential rims.
7 more elements
Dependencies are inferred from the claim text.