Patent ID: 7487692

Claim:
A ball nut comprising: a nut member including a bore formed therein, and an inner thread formed in said bore of said nut member for threading with a screw member, said nut member including a recess formed therein and communicating with said bore of said nut member, and including an opening formed in a first planar end surface of said nut member and communicating with said bore and said recess of said nut member, said opening of said nut member including a width greater than that of said recess of said nut member for forming at least one anchoring surface between said opening and said recess of said nut member and formed in said first end of said nut member, said nut member including at least one positioning projection extended between said bore and said opening of said nut member, a guiding device including a shank received and engaged in said recess of said nut member, and including at least one return channel formed in said shank for aligning with said inner thread of said nut member, and including a first anchoring bar provided on said shank and engaged in said opening of said nut member, and said first anchoring bar including at least one end portion extended out of said shank of said guiding device for engaging with said at least one anchoring surface of said nut member and for anchoring said guiding device to said nut member and for preventing said guiding device from moving relative to said nut member, and said at least one positioning projection of said nut member being engaged with said first anchoring bar of said guiding device for further anchoring said guiding device to said nut member, and said guiding device including at least one tongue extended from said anchoring bar for engaging with at least one corresponding cavity formed in said shank and for securing said anchoring bar and said shank together, and at least one fastener engaged through said at least one end portion of said anchoring bar and threaded with a screw hole formed in said at least one anchoring surface of said nut member for securing said guiding device to said nut member.