Patent US3575620A successfully refreshed from Google Patents.
US3575620A
Expired / Lapsed
US
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Vibratory drive unit
Assignee: Illinois Tool Works Inc
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Filing: 1970-03-18
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Granted: 1971-04-20
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Expires: 1990-03-18
Abstract
Abstract Drive unit for vibratory part feeder utilizes a tubular cylinder as both a protective case for the unit to enclose an electromagnetic coil, and also, by angularly slotting the cylinder completely around its periphery, as a spring which cooperates with the electromagnetic coil to provide a vibratory feeding motion to parts placed in a feeder bowl which may be attached to the drive unit.
Inventors
- 👤 Denver Braden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:10
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/02; H02K33/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
203 words
A vibratory drive unit for use with a parts feeding bowl comprising: an elongated hollow cylinder member having first and second end portions and an intermediate central portion; said first end portion being integrally fastened to a drive unit base member; said second end portion being integrally fastened to a feeder bowl support member. an electromagnetic coil affixed to one of said end portions and an armature member affixed to the other of said end portions, said armature member being spaced from said coil; said central portion of said cylinder having elongated slots arranged completely around its periphery at an angle to the axis of said cylinder so as to define a plurality of web portions of narrow width which interconnect said end portions, said plurality of web portions being sufficiently small in cross section so as to resiliently bend to permit the said end portions to move toward each other when said coil is periodically energized so as to magnetically attract and move said armature, the time required for said end portions to move toward each other by the energization of said electromagnetic coil being substantially faster than the time required for the resilient web portions to return to their unstressed positions.
Claim 2
Dependent Claim
203 words
A vibratory drive unit for use with a parts feeding bowl comprising: an elongated hollow cylinder member having first and second end portions and an intermediate central portion; said first end portion being integrally fastened to a drive unit base member; said second end portion being integrally fastened to a feeder bowl support member. an electromagnetic coil affixed to one of said end portions and an armature member affixed to the other of said end portions, said armature member being spaced from said coil; said central portion of said cylinder having elongated slots arranged completely around its periphery at an angle to the axis of said cylinder so as to define a plurality of web portions of narrow width which interconnect said end portions, said plurality of web portions being sufficiently small in cross section so as to resiliently bend to permit the said end portions to move toward each other when said coil is periodically energized so as to magnetically attract and move said armature, the time required for said end portions to move toward each other by the energization of said electromagnetic coil being substantially faster than the time required for the resilient web portions to return to their unstressed positions.
Claim 3
Dependent Claim
15 words
A vibratory drive unit as defined in claim 1 wherein said cylinder comprises steel tubing.
Claim 4
Dependent Claim
44 words
A vibratory drive unit as defined in claim 1 wherein said electromagnetic coil is mounted on said drive unit base member for adjustable movement relative to said armature member in order to vary the width of the magnetic airgap between said coil and armature.
Claim 5
Dependent Claim
66 words
A vibratory drive unit as defined in claim 3 wherein said adjustable movement is provided by a first plurality of adjustable fasteners which permit said electromagnetic coil to be mounted at varying distances from said base member, and a second plurality of fasteners which serve to lock said electromagnetic coil to said base member but spaced therefrom in accordance with the setting of said adjustable fasteners.
Claim 6
Dependent Claim
51 words
A vibratory drive unit in accordance with claim 4 wherein the spacing of said coil from said armature can be varied from approximately 0.005 inch to 0.040 inch in order to vary the driving power and the amount of feed movement which may be imparted to a feeding bowl attached thereto.
Claim 7
Dependent Claim
54 words
A vibratory drive unit in accordance with claim 1 wherein the time required for said end portions to move toward each other when said coil is energized is less than one-half the time required to move away from each other due to the spring force of said web portions when said coil is deenergized.
Claim 8
Dependent Claim
19 words
A vibratory drive unit in accordance with claim 1 wherein said cylinder comprises the outer housing for said unit.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |