Machine element or mechanism – Gearing – Backlash take-up
Patent
1981-04-22
1984-03-06
Staab, Lawrence J.
Machine element or mechanism
Gearing
Backlash take-up
74441, 74 8915, 744248R, F16H 5518, F16H 118, F16H 2702
Patent
active
044346778
ABSTRACT:
An anti-backlash nut construction wherein a base portion that is adapted to be carried by a machine part, has a bore through which a lead screw can pass. The nut has a threaded portion which is connected to said base portion and which has a bore matching with the bore of the base portion, said threaded portion having a slot or slots by which it is divided into elements formed with thread formations engageable with the external threads of the screw extending through said bores. The base portion has cut-out walls forming pairs of slot ends which are located adjacent the ends of the slots of the threaded portion, so as to facilitate limited movement of the said divided elements toward and away from each other, whereby the thread formations can engage the screw with no clearance and looseness. The pairs of slot ends, together with the ends of the slots that are disposed in the threaded portion form triangles, with the slot ends being separated from each other by solid walls of the base portion. Completing the construction is a yieldable means carried by the pair of divided elements, which biases the same in directions toward each other so as to maintain them closely engaged with the said screw.
REFERENCES:
patent: 3831460 (1974-08-01), Linley, Jr.
patent: 3842686 (1974-10-01), Dressler
patent: 3977269 (1976-08-01), Linley, Jr.
patent: 4210033 (1980-07-01), Erikson et al.
patent: 4249426 (1981-02-01), Erikson et al.
IBM Technical Disclosure Bulletin, vol. 22, No. 5, Oct. 1979, R. W. Cornell, "Anti-Backlash Spring Clamp".
Bednarek Michael D.
Lehmann H. Gibner
Lehmann K. Gibner
Staab Lawrence J.
Universal Thread Grinding Company
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