Patent US4489740A successfully refreshed from Google Patents.
US4489740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc cleaning machine
Assignee: SPX Technologies Inc
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Filing: 1982-12-27
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Granted: 1984-12-25
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Expires: 2002-12-27
Abstract
Abstract A cleaning machine for cleaning annular discs is disclosed. Annular discs of rigid or flexible material are designed to receive a magnetic coating capable of operating as a memory for a computer. The cleaning machine uses a spindle that aligns and holds the disc. The spindle rotates and high pressure cleaning fluid simultaneously washes both sides of the disc. In one embodiment the spindle has a conical ferrule made of abrasion-resistant rubber. In another embodiment the spindle includes centrifugally-operable hold down arms that extend from the spindle during rotation to keep the disc on the spindle.
Inventors
- 👤 William D. Rattan
- 👤 Craig M. Walwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:42
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/505; Y; Y10; Y10S; Y10S134/00; Y10S134/902
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
167 words
A machine for cleaning a surface of an annular disc having an inner annular surface of a predetermined diameter, comprising: a dispenser for dispensing a stream of cleaning fluid onto one or both surfaces of an annular disc, rotational drive means, a spindle for holding and rotating a disc through a dispensed stream of cleaning fluid, the spindle having one end rotatably fixed to the housing and the other end having a tapered surface configuration with a terminal diameter less than the diameter of the disc and gradually increasing in diameter in the direction of the rotatable end said tapered surface so configured to receive and support a disc along the inner annular surface of the disc, and means carried on the spindle and adapted to impart the rotational movement and to direct at least a portion of the centrifugal force of the rotating spindle toward the disc for holding the disc on the spindle as the disc is rotated, impacted and cleaned with dispensed cleaning fluid.
Claim 2
Dependent Claim
167 words
A machine for cleaning a surface of an annular disc having an inner annular surface of a predetermined diameter, comprising: a dispenser for dispensing a stream of cleaning fluid onto one or both surfaces of an annular disc, rotational drive means, a spindle for holding and rotating a disc through a dispensed stream of cleaning fluid, the spindle having one end rotatably fixed to the housing and the other end having a tapered surface configuration with a terminal diameter less than the diameter of the disc and gradually increasing in diameter in the direction of the rotatable end said tapered surface so configured to receive and support a disc along the inner annular surface of the disc, and means carried on the spindle and adapted to impart the rotational movement and to direct at least a portion of the centrifugal force of the rotating spindle toward the disc for holding the disc on the spindle as the disc is rotated, impacted and cleaned with dispensed cleaning fluid.
Claim 3
Dependent Claim
25 words
The invention of claim 1 wherein the dispensing means comprises at least two nozzles adapted to simultaneously dispense fluid against opposite surfaces of the disc.
Claim 4
Dependent Claim
53 words
The machine of claim 1 wherein the spindle comprises a first outer friction ring disposed below the intended plane of rotation of the disc and a first plurality of retractable detents disposed above the plane of the disc for engaging a disc and holding the disc between the detents and the friction ring.
Claim 5
Dependent Claim
44 words
The machine of claim 3 further comprising a stepped adapted having a second plurality of detents registrable with said first plurality of detents, an inner surface adapted to rest on said first outer friction ring and an outer surface with a second friction ring.
Claim 6
Dependent Claim
19 words
The machine of claim 1 wherein the means carried on the spindle comprises a ring of resilient friction material.
Claim 7
Dependent Claim
13 words
The machine of claim 5 wherein the ring is of an elastomeric material.
Claim 8
Dependent Claim
29 words
The machine of claim 6 wherein the elastomeric material is an abrasive resistant substance for resisting abrasion due to the impacting fluid and the inner annulus of the disc.
Claim 9
Dependent Claim
44 words
The machine of claim 1 wherein the means carried on the spindle comprises a bushing of resilient material having a plurality of extensible arms fashioned from circumferential, axial sections of the bushing and extended by centrifugal force to hold the disc on the spindle.
Claim 10
Dependent Claim
28 words
The machine of claim 8 wherein the bushing further comprises a corresponding plurality of integral hinges each for resiliently connecting one end of an arm to the bushing.
Claim 11
Dependent Claim
24 words
The machine of claim 9 wherein each arm further comprises a centrifugal weight for increasing the centrifugal force of the arm on a disc.
Claim 12
Dependent Claim
38 words
The machine of claim 1 wherein the spindle comprises a plurality of recesses and a corresponding plurality of extensible arms mounted in the recess and extended by centrifugal force to engage and hold the disc on the spindle.
Claim 13
Dependent Claim
29 words
The machine of claim 11 wherein the arms are pivotally mounted in the recesses and the axes of pivot are in a plane below the plane of the disc.
Claim 14
Dependent Claim
48 words
The machine of claim 11 wherein the means carried on the spindle includes a ring of resilient friction material and each extensible arm engages a portion of an inner wall of the friction ring and, during rotation, expands that portion against the inner annular surface of the disc.
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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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |