US4210033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-backlash nut
Assignee: Kerk Motion Products Inc
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Filing: 1978-05-19
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Granted: 1980-07-01
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Expires: 1998-05-19
Abstract
Abstract An anti-backlash nut is disclosed of the type which undergoes translational movement along a screw in response to relative rotational movement between the nut and screw. This anti-backlash nut has oppositely-directed longitudinal flexure members radially biased towards the screw to provide equal drag torque and minimum relative deflection for travel of the nut in either direction.
Inventors
- 👤 Kenneth W. Erikson
- 👤 Keith W. Erikson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/2003; F16H25/2009; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19805; Y10T74/19809; Y10T74/19814; Y10T74/1987; Y10T74/19893; Y10T74/19898; Y10T74/19902
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
An anti-backlash nut designed to undergo translational movement along a screw having an external thread thereon in response to relative rotational movement between the anti-backlash nut and screw, said nut having a hollow cylindrical bore with an internal thread complementary to the external thread on the screw and said nut comprising, in combination: a. a continuous portion extending longitudinally from one end of said nut to the other and thereof; b. oppositely-directed longitudinal flexure members, said flexure members having one end fixed to said anti-backlash nut and their other end free-floating; and, c. means for biasing said oppositely-directed longitudinal flexure members towards the external thread of said screw.
Claim 2
Dependent Claim
108 words
An anti-backlash nut designed to undergo translational movement along a screw having an external thread thereon in response to relative rotational movement between the anti-backlash nut and screw, said nut having a hollow cylindrical bore with an internal thread complementary to the external thread on the screw and said nut comprising, in combination: a. a continuous portion extending longitudinally from one end of said nut to the other and thereof; b. oppositely-directed longitudinal flexure members, said flexure members having one end fixed to said anti-backlash nut and their other end free-floating; and, c. means for biasing said oppositely-directed longitudinal flexure members towards the external thread of said screw.
Claim 3
Dependent Claim
15 words
An anti-backlash nut of claim 1 having a total of three oppositely directed flexure members.
Claim 4
Dependent Claim
25 words
An anti-backlash nut of claim 1 wherein said means for biasing comprises at least one spring running around the outer periphery of said anti-backlash nut.
Claim 5
Dependent Claim
23 words
An anti-backlash nut of claim 3 wherein said spring is positioned in a slot extending around the outer periphery of said anti-backlash nut.
Claim 6
Dependent Claim
15 words
An anti-backlash nut of claim 4 additionally including a faceplate fastened to one end thereof.
Claim 7
Dependent Claim
44 words
An anti-backlash nut of claim 5 having a total of three oppositely-directed longitudinal flexure members, two of which are fixed to the end of said nut at which the faceplate is located with the other flexure member being fixed at the other end therof.
Claim 8
Dependent Claim
13 words
An anti-backlash nut of claim 1 formed from a low-friction, self-lubricating polymeric material.
Claim 9
Dependent Claim
13 words
An anti-backlash nut of claim 6 formed from a low-friction, self-lubricating polymeric material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-01 | 1983-12-31 | 1984-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-01 | 1987-12-31 | 1988-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-01 | 1991-12-31 | 1992-07-01 | $7700.00 | Window Closed / Lapsed |