Reversing nut for diamond thread screw
US4031765A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Mar 31, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18312
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A reversing nut construction for a diamond thread screw of the type having criss-crossed left- and right-hand grooves, the nut comprising an annular nut body having a through bore to receive the screw, a thread-engaging ball carried by the body and extending into the bore thereof, and a second thread-engaging ball also extending into the bore. The first ball has mounting means which enables it to undergo rolling motion, but is held against axial or lateral movement on the nut body. The second ball also undergoes rolling motion, but is further capable of being shifted axially of the body between oppositely disposed extreme positions, whereby it can travel along the left-hand groove of the screw when it is disposed in one position, or the right-hand groove of the screw when it is disposed in the other position. Yieldable detent means, comprising a pair of spring rings, selectively engage the movable ball and bias it into continuous engagement with the screw, while still enabling it to be shifted axially. Such shifting is accomplished by curved reversing grooves which are disposed at the opposite ends of the screw and which are adapted to engage and shift the movable ball so as to eff…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.