Patent US3654816A successfully refreshed from Google Patents.
US3654816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw engaging device
Assignee: Unisys Corp
•
Filing: 1970-12-01
•
Granted: 1972-04-11
•
Expires: 1990-12-01
Abstract
Abstract A device for controllably engaging the helical thread of a screw wherein a spring member is disposed concentrically about a portion of the outer diameter of the screw in substantial alignment with the helical thread thereof, one end of the spring member being rotatably restrained by a support and the other end of the spring member being bidirectionally rotatable about the screw for diametrically contracting and dilating the spring member into and out of engagement with the helical thread of the screw.
Inventors
- 👤 Jack Beery
- 👤 Zong-Shyong Luo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:00
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/24; F16H25/2427; B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; F16H25/2025; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19721
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
137 words
A device for drivably coupling a movable member with a helically threaded screw, said device comprising; a stationary support spaced apart from the screw, and a spring member having a body section concentrically disposed about the screw in substantial alignment with the helical thread thereof, a static end of said spring member being rotatably restrained and axially guided by said stationary support, and a reaction end of said spring member being coupled with the movable member so that rotation of the movable member in a predetermined arc about the helically threaded screw diametrically contracts the body section of the spring member into drivable engagement with the screw whereas rotation of the movable member about tHe screw in an arc of opposite direction diametrically dilates the body section of said spring member out of engagement with the screw.
Claim 2
Independent Claim
137 words
A device for drivably coupling a movable member with a helically threaded screw, said device comprising; a stationary support spaced apart from the screw, and a spring member having a body section concentrically disposed about the screw in substantial alignment with the helical thread thereof, a static end of said spring member being rotatably restrained and axially guided by said stationary support, and a reaction end of said spring member being coupled with the movable member so that rotation of the movable member in a predetermined arc about the helically threaded screw diametrically contracts the body section of the spring member into drivable engagement with the screw whereas rotation of the movable member about tHe screw in an arc of opposite direction diametrically dilates the body section of said spring member out of engagement with the screw.
Claim 3
Dependent Claim
23 words
A device as defined in claim 1 wherein the body section of said spring member circumscribes at least one revolution of the screw.
Claim 4
Dependent Claim
32 words
A device as defined in claim 1 wherein said stationary support has a longitudinal slot aligned with the screw for longitudinally guiding and rotatably restraining the static end of said spring member.
Claim 5
Dependent Claim
33 words
A device as defined in claim 1 further including a housing coupled with said spring member for concentrically positioning the body section of said spring member with respect to the helically threaded screw.
Claim 6
Dependent Claim
35 words
A device as defined in claim 4 wherein said housing has an annular opening through which the screw projects, said spring member being internally carried by said housing in concentric relationship with said annular opening.
Claim 7
Dependent Claim
31 words
A device as defined in claim 5 wherein a predetermined inner diameter of said annular opening establishes an outer limit of diametric dilation of the body section of said spring member.
Claim 8
Dependent Claim
57 words
A device as defined in claim 5 wherein a longitudinal portion of said annular opening is formed by an inner cylindrical surface of an annular bearing, said inner cylindrical surface having a diameter slightly greater than the maximum outside diameter of the screw for maintaining said housing and said spring member in concentric relationship with the screw.
Claim 9
Dependent Claim
61 words
A device as defined in claim 5 wherein the static end of said spring member extends exteriorly of said housing, the reaction end of said spring member being fixedly carried therein, the movable member thus being connectable to said housing for rotation of said housing in an arc about the screw for diametrically varying the body section of said spring member.
Claim 10
Independent Claim
143 words
A device for drivably coupling a movable member with a helically threaded screw, said device comprising; a stationary support spaced apart from said screw, said stationary support having a longitudinal slot aligned with the screw, a spring member having two body sections axially separated and in mutually concentric relationship with the screw, the two of said body sections having independent reaction ends and a mutual static end slidably engaged within the slot of said stationary support, and a housing fixedly engaging the reaction ends of said spring member and carrying the body sections thereof in concentric relationship with said screw, said housing being connected to said movable member such that bidirectional rotation of said movable member in predetermined respective arcs about the screw diametrically contracts and dilates the body section of said spring member into and out of driving engagement with the screw.
Claim 11
Independent Claim
143 words
A device for drivably coupling a movable member with a helically threaded screw, said device comprising; a stationary support spaced apart from said screw, said stationary support having a longitudinal slot aligned with the screw, a spring member having two body sections axially separated and in mutually concentric relationship with the screw, the two of said body sections having independent reaction ends and a mutual static end slidably engaged within the slot of said stationary support, and a housing fixedly engaging the reaction ends of said spring member and carrying the body sections thereof in concentric relationship with said screw, said housing being connected to said movable member such that bidirectional rotation of said movable member in predetermined respective arcs about the screw diametrically contracts and dilates the body section of said spring member into and out of driving engagement with the screw.
Claim 12
Dependent Claim
133 words
A ratchetable driving mechanism comprising; an axially rotatable screw having a helical rib disposed about the periphery thereof, said rib being formed by the junction of a first and a second surface, said first surface being in the form of a ridge helically disposed about the screw in substantially normal relationship with the axis of said screw and said second surface being acutely inclined with said axis, and a diametrically resilient spring member having a body section concentrically disposed about said screw in abutment with said first surface, whereby rotation of said screw in a first direction axially translates said spring member in abutment with said first surface, said spring member being ratchetably movable in the direction of translation over said second surface but substantially resistent to movement opposite said direction of translation.
Claim 13
Dependent Claim
133 words
A ratchetable driving mechanism comprising; an axially rotatable screw having a helical rib disposed about the periphery thereof, said rib being formed by the junction of a first and a second surface, said first surface being in the form of a ridge helically disposed about the screw in substantially normal relationship with the axis of said screw and said second surface being acutely inclined with said axis, and a diametrically resilient spring member having a body section concentrically disposed about said screw in abutment with said first surface, whereby rotation of said screw in a first direction axially translates said spring member in abutment with said first surface, said spring member being ratchetably movable in the direction of translation over said second surface but substantially resistent to movement opposite said direction of translation.
References Cited (Backward Citations)
US2443020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |