Patent US3552545A successfully refreshed from Google Patents.
US3552545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibratory hopper and trough coupled as a two-mass tuned vibratory system
Assignee: Individual
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Filing: 1969-02-27
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Granted: 1971-01-05
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Expires: 1989-02-27
Abstract
Abstract A vibratory hopper and trough combination comprising a two-mass spring coupled system having one mode of vibration and tuned close to but less than the frequency of the applied vibratory force. One mass comprises an independently mounted bottom or discharge portion of the hopper and its contained material. The other mass is the trough for carrying the material away from the hopper discharge opening. The force generating means of the twomass spring coupled system may be attached to either mass to produce a periodically varying force to keep the system in vibration. The frequency of the exciting force is variable to a maximum of approximately 90 percent of the natural frequency of the system, and thereby there is provided a method for controlling delivery rate of the material. This system provides vibration in the bottom portion of the feed hopper to insure free flow of material therefrom thereby eliminating auxiliary vibrators. Also eliminated by the present system are the auxiliary masses which were associated with tuned vibratory feeders of the prior art, such auxiliary masses being required in order to provide a reaction mass for the vibrated trough.
Inventors
- 👤 Byron King Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:32
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/30; B65G65/34; B65G65/40; B65G65/44; B65G27/00; B65G27/10; B65G27/28; B65G27/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
242 words
Vibratory feeding apparatus for use with a hopper for the storage of bulk material, said hopper including an upper section having a lower discharge opening therein, said feeding apparatus comprising a first vibrating mass including the lower section of said hopper, said lower hopper section having an upper opening therein aligned with the discharge opening of said upper hopper section, said lower section having a lower discharge opening and at a least a pair of oppositely positioned downwardly converging wall portions for directing the material received within said lower section to its lower discharge opening; means mounting said lower hopper section in superposed but spaced relationship to said upper hopper section so that vibratory forces imparted to the lower section will not be transmitted to the upper section; a feeder trough comprising a second vibrating mass; spring means rigidly connected to said feeder trough and to said lower hopper section for mounting said feeder trough beneath said lower hopper section to receive material therefrom and discharge it at a discharge point laterally thereof; and vibratory means mounted upon one of said vibrating masses for imparting oscillatory movement thereto to cause material to be deposited from said lower hopper section to said trough and along said trough to a material discharge point; the natural frequency of the vibrating system which includes said lower hopper section, said feeder trough and said spring means being close to the maximum operating frequency of said vibratory means.
Claim 2
Dependent Claim
242 words
Vibratory feeding apparatus for use with a hopper for the storage of bulk material, said hopper including an upper section having a lower discharge opening therein, said feeding apparatus comprising a first vibrating mass including the lower section of said hopper, said lower hopper section having an upper opening therein aligned with the discharge opening of said upper hopper section, said lower section having a lower discharge opening and at a least a pair of oppositely positioned downwardly converging wall portions for directing the material received within said lower section to its lower discharge opening; means mounting said lower hopper section in superposed but spaced relationship to said upper hopper section so that vibratory forces imparted to the lower section will not be transmitted to the upper section; a feeder trough comprising a second vibrating mass; spring means rigidly connected to said feeder trough and to said lower hopper section for mounting said feeder trough beneath said lower hopper section to receive material therefrom and discharge it at a discharge point laterally thereof; and vibratory means mounted upon one of said vibrating masses for imparting oscillatory movement thereto to cause material to be deposited from said lower hopper section to said trough and along said trough to a material discharge point; the natural frequency of the vibrating system which includes said lower hopper section, said feeder trough and said spring means being close to the maximum operating frequency of said vibratory means.
Claim 3
Dependent Claim
17 words
Vibratory feeding apparatus according to claim 1 including means for varying the frequency of said vibratory means.
Claim 4
Dependent Claim
17 words
Vibratory feeding apparatus according to claim 1 wherein said vibratory means comprises a rotating, eccentrically mounted mass.
Claim 5
Dependent Claim
29 words
Vibratory feeding apparatus according to claim 3 wherein the rotary axis of said vibratory means is positioned transversely of the feeding direction of said trough and generally rearwardly thereof.
Claim 6
Dependent Claim
57 words
Vibratory feeding apparatus according to claim 1 wherein said spring means comprises a plurality of flat spring members arranged along each side of said feeder trough and each of which is positioned at an acute angle to the vertical with the upper end thereof extending rearwardly of the direction of movement of material upon said feeder trough.
Claim 7
Dependent Claim
64 words
Vibratory feeding apparatus according to claim 5 wherein said vibratory means comprises a pair of rotary vibrators each of which includes a rotating, eccentrically mounted mass; said rotary vibrators being mounted upon opposite sides of said apparatus with respect to the feeding path of said feeder trough; and the axes of said rotary vibrators extending parallel to the axes of said flat spring members.
Claim 8
Dependent Claim
70 words
Vibratory feeding apparatus according to claim 5 wherein said vibratory means comprises a pair of rotary vibrators each of which includes a rotating, eccentrically mounted mass; said rotary vibrators being mounted adjacent to each other with the axes thereof extending parallel to each other within a plane which is generally parallel to the planes of said flat spring members; said rotary vibrators being adapted to be rotated in opposite directions.
Claim 9
Dependent Claim
34 words
Vibratory feeding apparatus according to claim 1 wherein said vibratory means is mounted upon the rear ward portion of said apparatus with respect to the direction of movement of material upon said feeder trough.
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |