초록 ▼

A nut has a nut member having a thread for engaging a bolt, a stud and the like and a plurality of screw members extending through the nut member and provided at its one ends with gears to be simultaneously engaged by an additional member and simultaneously turned, so as to simultaneously turn the s

A nut has a nut member having a thread for engaging a bolt, a stud and the like and a plurality of screw members extending through the nut member and provided at its one ends with gears to be simultaneously engaged by an additional member and simultaneously turned, so as to simultaneously turn the screw members adapted to abut against an object, and to tighten or to loosen the nut. A tightening device includes the inventive nut and an element which simultaneously engages the gears of the screw members and turns them to tighten the nut.

대표청구항 ▼

[ What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:] [1.] A nut for a bolt and the like, comprising a nut member provided with a thread engageable with a thread of a bolt; a plurality of screw members screwable in said nut member and having a f

[ What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:] [1.] A nut for a bolt and the like, comprising a nut member provided with a thread engageable with a thread of a bolt; a plurality of screw members screwable in said nut member and having a first end adapted to abut against an object and a second opposite end; said opposite end of each of said screw members being provided with a gear formed so that all said gears of all said screw members can be engaged simultaneously by an additional element and turned simultaneously so as to simultaneously turn all said screw members.