Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1975-03-31
1977-06-28
Scott, Samuel
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
F16H 2512
Patent
active
040317650
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 effect a reversal in the axial direction of travel of the nut. For a given relative sense of rotation between the screw and nut, the latter can undergo reciprocating movement between the ends of the screw, with the reversals in the axial direction of travel of the nut being automatically effected.
REFERENCES:
patent: 1233858 (1917-07-01), Farmer
Lehmann H. Gibner
Lehmann K. Gibner
Norco Inc.
Ratliff, Jr. Wesley S.
Scott Samuel
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