US3591001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sifting apparatus
Assignee: Stein and Roubaix SA
•
Filing: 1969-02-03
•
Granted: 1971-07-06
•
Expires: 1989-02-03
Abstract
Abstract A sifting apparatus comprising screens arranged in polygonal formation within a rotary drum, the assembly of screens being resiliently suspended within the drum and subjected to vibration by a motor driving eccentric weights.
Inventors
- 👤 Guy Quesnel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:11
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
1. A sifting apparatus for separating particulate materials, comprising; a cylindrical drum; a plurality of pneumatic tires adapted to rotatably mount said cylindrical drum; drive means connected to at least one of said tires so as to rotate said tire and correspondingly impart rotation to said cylindrical drum; frame means positioned within said cylindrical drum; spring means connected to said cylindrical drum and to said frame means so as to resiliently suspend said frame means within said drum; screens supported on said frame means for rotation therewith, said screens being arranged forming the surfaces of a prism generally coaxial with said drum; vibration generating means fastened to said frame means and adapted to impart vibratory movement thereto; means for feeding particulate materials to be sifted to the interior of said prism; and, means for removing sifted particulate materials from said drum and prism.
Claim 2
Dependent Claim
143 words
1. A sifting apparatus for separating particulate materials, comprising; a cylindrical drum; a plurality of pneumatic tires adapted to rotatably mount said cylindrical drum; drive means connected to at least one of said tires so as to rotate said tire and correspondingly impart rotation to said cylindrical drum; frame means positioned within said cylindrical drum; spring means connected to said cylindrical drum and to said frame means so as to resiliently suspend said frame means within said drum; screens supported on said frame means for rotation therewith, said screens being arranged forming the surfaces of a prism generally coaxial with said drum; vibration generating means fastened to said frame means and adapted to impart vibratory movement thereto; means for feeding particulate materials to be sifted to the interior of said prism; and, means for removing sifted particulate materials from said drum and prism.
Claim 3
Dependent Claim
41 words
A sifting apparatus as claimed in claim 1, wherein said vibration generating means comprises a motor including eccentric weight means connected to said motor, said motor being adapted to drive said eccentric weight means so as to vibrate said frame means
Claim 4
Dependent Claim
53 words
A sifting apparatus as claimed in claim 1, wherein said drum is rotatable about a generally horizontal axis, and said eccentric weight means comprise unbalanced weights so as to generate vibrations deflecting said frame means relative to said axis, thereby advancing the particulate materials to be sifted along the length of said prism.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |