Nut and device for tightening provided with the same

• US 5,934,853 A
• Filed: 10/24/1997
• Issued: 08/10/1999
• Est. Priority Date: 10/24/1997
• Status: Expired due to Term

• Current Assignee: Hytorc Division UNEX Corporation
• Original Assignee: John K. Junkers
• Inventors: Junkers, John K.
• Primary Examiner(s): Wilson, Neill R.
• Application Number:
  US08/957,618
• Time in Patent Office: 655 Days
• Field of Search: 411/383, 411/384, 411/402, 411/407, 411/432, 411/916, 411/917, 81/57.14, 81/57.22
• US Class Current: 411/432
• CPC Class Codes: B23P 19/067 Bolt tensioners for hand tools B25B29/02
• CPC Class Codes: F16B 23/0061 with grooves, notches or splines on the external peripheral surface designed for tools engaging in radial direction F16B23/003 takes precedence
• CPC Class Codes: F16B 31/04 for maintaining a tensile load
• CPC Class Codes: Y10S 411/917 Nut having tension feature

Abstract

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.

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.

2. A nut as defined in claim 1, wherein said nut member has an axis, said screw members extending in an axial direction and being arranged around said axis of said nut member at substantially equal peripheral distances.

3. A device for tightening and loosening, comprising a nut including 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;

and an element simultaneously engaging all said gears of all said screw members so as to simultaneously turn all said gears and thereby all said screw members.

4. A device as defined in claim 3, wherein said nut member has an axis, said screw members extending in an axial direction and being arranged around said axis of said nut member at substantially equal peripheral distances.

5. A device as defined in claim 3, wherein said element has a plurality of inner gears engageable with said gears of said screw members.

6. A device as defined in claim 5, wherein said intermediate element is formed as a socket having one end provided with said inner gears engageable with said gears of said screw members and another end provided with an additional formation engageable by a tool.

7. A device as defined in claim 3, wherein said element is provided with a plurality of outer gears inwardly engaging said gears of said screw members.

8. A device as defined in claim 7, wherein said element is formed as a disk having an outer surface provided with said outer gears engageable with said gears of said screw members and an additional formation engageable by a tool.