US3640141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor holddown apparatus
Assignee: Hollingsead International Inc
•
Filing: 1969-12-19
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Granted: 1972-02-08
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Expires: 1989-12-19
Abstract
Abstract An extractor holddown apparatus is disclosed for displacing and securing a unit of electronic equipment onto a rack or shelf. The apparatus includes a spindle pivotally connected to the shelf. A carriage is threadedly mounted on the spindle and is adapted to be rigidly secured to the unit of electronic equipment. The carriage is driven along the spindle to apply a translational force on the unit to move the unit rearwardly into engagement with a rear connector, and to maintain the unit in a secured position with a desired amount of force. The carriage is also forwardly driven to function as an extractor. A drive assembly for driving the carriage along the spindle includes a knob shell having a drive nut located therein. The drive nut is threadedly mounted on the spindle and is resiliently coupled to the carriage for applying an axial force thereto. Spring biased drive pins interconnect the knob shell with the drive nut and are disengageable on a given amount of force. An indicator plate is also located within the knob shell to provide a visual inspection aid to indicate whether or not the apparatus is applying the desired amount of force on the carriage. Spring-biased selflocking means also interconnect the drive nut and the spindle to prevent antirotation therebetween.
Inventors
- 👤 Robert A Hollingsead
- 👤 Abraham Kuchler
- 👤 Clyde Robert Pryor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:18
CPC Classifications
F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; F16H25/2025; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18696
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
107 words
In an extractor-front holddown apparatus for displacing and securing a component chassis onto a rack, said rack having a spindle attached to the front end thereof, the apparatus having a carriage movable along the axis of the spindle, said carriage having means for receiving a portion of the component chassis, the improvement comprising: drive means movably mounted on the spindle and connected to said carriage for applying a translational force to said carriage in both directions of axial movement; and means movably mounted on said carriage for securing the portion of the component chassis with said receiving means, free of any additional translational forces to said carriage.
Claim 2
Dependent Claim
107 words
In an extractor-front holddown apparatus for displacing and securing a component chassis onto a rack, said rack having a spindle attached to the front end thereof, the apparatus having a carriage movable along the axis of the spindle, said carriage having means for receiving a portion of the component chassis, the improvement comprising: drive means movably mounted on the spindle and connected to said carriage for applying a translational force to said carriage in both directions of axial movement; and means movably mounted on said carriage for securing the portion of the component chassis with said receiving means, free of any additional translational forces to said carriage.
Claim 3
Dependent Claim
23 words
The invention of claim 1 further comprising means for visually indicating that a predetermined amount of translational force is applied to said carriage.
Claim 4
Dependent Claim
29 words
The invention of claim 1 further comprising clutch means for uncoupling said drive means from said carriage upon a predetermined amount of applied translational force acting on said carriage.
Claim 5
Dependent Claim
18 words
The invention of claim 3 wherein said drive means includes a drive nut threadedly mounted on said spindle.
Claim 6
Dependent Claim
45 words
The invention of claim 4 wherein said drive means further comprises a knob shell extending over said drive nut and said clutch means comprises means for interconnecting said knob shell to said drive nut to enable said knob shell to rotatably drive said drive nut.
Claim 7
Dependent Claim
23 words
The invention of claim 5 wherein said interconnecting means further comprises spring-biased means for releasing said interconnecting means in one direction of rotation.
Claim 8
Dependent Claim
26 words
The invention of claim 6 wherein said interconnecting means includes drive pin axially positioned within axial bore means formed within said knob shell and drive nut.
Claim 9
Dependent Claim
36 words
The invention of claim 7 wherein said drive pin means are adapted to recede from the axial bores of said drive nut upon further translational movement of the drive nut with respect to said knob shell.
Claim 10
Dependent Claim
17 words
The invention of claim 8 wherein said drive pin means are resiliently mounted within said axial bores.
Claim 11
Dependent Claim
33 words
The invention of claim 9 wherein the extremities of said drive pin means located within the axial bores of said drive nuts are beveled in the direction of rotation of said drive nut.
Claim 12
Dependent Claim
23 words
The invention of claim 7 further comprising means for visually indicating that a predetermined amount of translational force is applied to said carriage.
Claim 13
Dependent Claim
82 words
The invention of claim 11 wherein said indicator means comprises an indicator plate integrally connected to said drive nut, and axially movable therewith, said plate being dimensioned to extend out of one end of said knob shell when said drive nut is applying a force on said carriage below said predetermined amount of translational force, and to extend entirely within said knob shell when the drive nut is applying a force on said carriage equal to said predetermined amount of translational force.
Claim 14
Dependent Claim
21 words
The invention of claim 3 wherein said receiving means comprises a transverse recess formed on the upper portion of said carriage.
Claim 15
Dependent Claim
30 words
The invention of claim 13 wherein said securing means comprises a cup-shaped latch pivotally mounted on said carriage and adapted to extend over the unit portion received in said recess.
Claim 16
Dependent Claim
18 words
The invention of claim 7 further comprising resilient coupling means for interconnecting said carriage and said drive nut.
Claim 17
Dependent Claim
20 words
The invention of claim 15 wherein said resilient means comprises a plurality of bellville washers located within said knob shell.
Claim 18
Dependent Claim
27 words
The invention of claim 16 further including bearing means extending between said one end of said bellville washers and said carriage to permit relative angular rotation therebetween.
Claim 19
Dependent Claim
21 words
The invention of claim 4 further including self-locking means for preventing antirotation of said drive nut with respect to said spindle.
Claim 20
Dependent Claim
57 words
The invention of claim 18 wherein said self-locking means includes: said spindle having a plurality of intersecting planar surfaces with said spindle being threaded at said intersections; and spring-biased means connected to said drive nut and engaging said planar surfaces for applying a holding force on said planar surfaces at any angular position of said drive nut.
Claim 21
Dependent Claim
57 words
The invention of claim 19 wherein said spring-biased means includes: a plurality of pins extending through a plurality of radial bores formed within said drive nut and engaging the planar surfaces of said spindle; and a coil spring extending around said drive nut and biasly engaging said pins to urge them into engagement with said planar surfaces.
Claim 22
Dependent Claim
110 words
In a drive assembly for an extractor-front holddown apparatus, said apparatus adapted to displace and secure a component chassis onto a rack, said rack having a spindle attached to the front end thereof, the improvement comprising: drive means movably mounted on said spindle and connected to a driven member for applying a translational force to the driven member; clutching means for disengaging said drive means to limit the amount of translational force that the drive means can apply to the driven member; and indicator means coupled to said drive means for visually indicating that a predetermined amount of translational force is applied by said drive means to the driven member.
Claim 23
Dependent Claim
110 words
In a drive assembly for an extractor-front holddown apparatus, said apparatus adapted to displace and secure a component chassis onto a rack, said rack having a spindle attached to the front end thereof, the improvement comprising: drive means movably mounted on said spindle and connected to a driven member for applying a translational force to the driven member; clutching means for disengaging said drive means to limit the amount of translational force that the drive means can apply to the driven member; and indicator means coupled to said drive means for visually indicating that a predetermined amount of translational force is applied by said drive means to the driven member.
Claim 24
Dependent Claim
21 words
The invention of claim 21 further including self-locking means for preventing antirotation of said drive means with respect to said spindle.
Claim 25
Dependent Claim
18 words
The invention of claim 21 wherein said drive means includes a drive nut threadedly mounted on said spindle.
Claim 26
Dependent Claim
18 words
The invention of claim 23 wherein said drive means further includes knob shell extending over said drive nut.
Claim 27
Dependent Claim
82 words
The invention of claim 22 wherein said indicator means comprises an indicator plate integrally connected to said drive nut and axially movable therewith, said plate being dimensioned to extend out of one end of said knob shell when said drive nut is applying a force on said carriage below said predetermined amount of translational force, and to extend entirely within said knob shell when the drive nut is applying a force on said carriage equal to said predetermined amount of translational force.
Claim 28
Dependent Claim
20 words
The invention of claim 23 wherein said resilient means includes a plurality of bellville washers located within said knob shell.
Claim 29
Dependent Claim
28 words
The invention of claim 26 further including bearing means extending between said one end of said bellville washers and said driven member to permit relative angular rotation therebetween.
Claim 30
Dependent Claim
31 words
The invention of claim 21 further including clutch means for uncoupling said drive means from said driven member upon a predetermined amount of applied translational force acting on said driven member.
Claim 31
Dependent Claim
18 words
The invention of claim 28 wherein said drive means includes a drive nut threadedly mounted on said spindle.
Claim 32
Dependent Claim
46 words
The invention of claim 29 wherein said drive means further includes: a knob shell extending over said drive nut; resilient coupling means interconnecting said driven member and said drive nut to provide a translational force on said driven member upon axial movement of said drive nut.
Claim 33
Dependent Claim
33 words
The invention of claim 30 wherein said clutching means includes means interconnecting said knob shell to said drive nut to enable the rotation of said knob shell to rotatably drive said drive nut.
Claim 34
Dependent Claim
39 words
The invention of claim 31 wHerein said interconnecting means includes spring-biased means for enabling said interconnecting means to be releasable in one direction of rotation thereby insuring against the drive nut applying too much force to said driven member.
Claim 35
Dependent Claim
27 words
The invention of claim 32 wherein said interconnecting means includes drive pin means axially positioned within axial bore means formed within said knob shell and drive nut.
Claim 36
Dependent Claim
36 words
The invention of claim 33 wherein said drive pin means are adapted to recede from the axial bores of said drive nut upon further translational movement of the drive nut with respect to said knob shell.
Claim 37
Dependent Claim
17 words
The invention of claim 34 wherein said drive pin means are resiliently mounted within said axial bores.
Claim 38
Dependent Claim
33 words
The invention of claim 35 wherein the extremities of said drive pin means located within the axial bores of said drive nuts are beveled in the direction of rotation of said drive nut.
Claim 39
Dependent Claim
20 words
The invention in accordance with claim 22 wherein said drive means includes a drive nut threadedly mounted on said spindle.
Claim 40
Dependent Claim
59 words
The invention of claim 37 wherein: the spindle is adapted to have a plurality of intersecting planar surfaces with said spindle being threaded at said intersections; said self-locking means comprising spring-biased means connected to said drive nut and engaging said planar surfaces for applying a holding force on said planar surfaces at any angular position of said drive nut.
Claim 41
Dependent Claim
57 words
The invention of claim 37 wherein said spring-biased means includes: a plurality of pins extending through a plurality of radial bores formed within said drive nut and engaging the planar surfaces of said spindle; and a coil spring extending around said drive nut and biasly engaging said pins to urge them into engagement with said planar surfaces.
Claim 42
Dependent Claim
97 words
In an extractor-front holddown apparatus for displacing a component chassis onto a rack, said rack having a spindle attached to the front end thereof, the apparatus having a carriage, movable along the axis of the spindle, having means for receiving a portion of the component chassis, the improvement comprising: drive means movably mounted on said spindle and connected to said carriage for applying a translational force to said carriage in both directions of axial movement; and means for visually indicating that a predetermined amount of translational force is applied by said drive means to the driven member.
Claim 43
Dependent Claim
97 words
In an extractor-front holddown apparatus for displacing a component chassis onto a rack, said rack having a spindle attached to the front end thereof, the apparatus having a carriage, movable along the axis of the spindle, having means for receiving a portion of the component chassis, the improvement comprising: drive means movably mounted on said spindle and connected to said carriage for applying a translational force to said carriage in both directions of axial movement; and means for visually indicating that a predetermined amount of translational force is applied by said drive means to the driven member.
Claim 44
Dependent Claim
29 words
The invention of claim 40 further comprising clutch means for uncoupling said drive means from said carriage upon said predetermined amount of applied translational force acting on said carriage.
Claim 45
Dependent Claim
18 words
The invention of claim 14 wherein said drive means includes a drive nut threadedly mounted on said spindle.
Claim 46
Dependent Claim
45 words
The invention of claim 42 wherein said drive means further comprises a knob shell extending over said drive nut and said clutch means comprises means for interconnecting said knob shell to said drive nut to enable said knob shell to rotatably drive said drive nut.
Claim 47
Dependent Claim
82 words
The invention of claim 43 wherein said indicator means comprises an indicator plate integrally connected to said drive nut, and axially movable therewith, said plate being dimensioned to extend out of one end of said knob shell when said drive nut is applying a force on said carriage below said predetermined amount of translational force, and to extend entirely within said knob shell when the drive nut is applying a force on said carriage equal to said predetermined amount of translational force.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |