US3737149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for mixing bituminous mixtures
Assignee: Wibau GmbH
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Filing: 1971-11-23
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Granted: 1973-06-05
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Expires: 1991-11-23
Abstract
Abstract Granular mineral components and bituminous binder components are mixed in a rotating drum by means of longitudinally extending chains which rotate along with the drum and which repeatedly lift the materials to be mixed and drop these materials again downstream of the preceding lifting point and which chains on their returning leg in each revolution provide a self cleaning action by contacting the inner surface of the drum. The apparatus for performing this method comprises a plurality of chains extending longitudinally within the drum and connected thereto by means which permit an adjustment of the slack in the chains. Preferably, the links of the chains are plates which are hinged to each other and which are adjustable in their angular position relative to a radial plane of the drum.
Inventors
- 👤 E Muntzer
- 👤 P Muntzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:12
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/02; E01C19/10; E01C19/1013; E01C19/1027; E01C19/1031; B; B01; B01F; B01F29/00; B01F29/25; B01F29/60; B01F29/63; E01C2019/1081; E01C2019/1095
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
19 words
The method according to claim 1, wherein said cleaning action cleans the chains as well as the drum wall.
Claim 2
Dependent Claim
22 words
The method according to claim 1, further comprising accelerating the passage of said materials from said drum inlet to said drum outlet.
Claim 3
Dependent Claim
22 words
The method according to claim 1, further comprising decelerating the passage of said materials from said drum inlet to said drum outlet.
Claim 4
Dependent Claim
169 words
In an apparatus for mixing bituminous mixtures, as by means of a rotatable drum drier having an inlet at one end thereof and an outlet at the opposite end, said drum being located with an inclination relative to the horizontal, the improvement comprising a plurality of chains, a like plurality of first means for securing one end of each of said chains to the inside of said drum intermediate its ends, a like plurality of second means longitudinally spaced from said first means and positioned relative to the drum for securing the other end of each of said chains, whereby said chains extend with sags longitudinally inside said drum substantially adjacent to the inner walls thereof, and intermediate the ends of the drum, said first securing means being connected to the inner surface of the drum in a common radial plane located adjacent to said inlet end of the drum, and said apparatus further comprising means for connecting said securing means to the drum adjacent to said outlet end.
Claim 5
Dependent Claim
33 words
The apparatus according to claim 5, Wherein said first and second securing means are longitudinally aligned in pairs whereby said chains extend in parallel to each other and coaxially relative to said drum.
Claim 6
Dependent Claim
24 words
The apparatus according to claim 5, wherein said first and second securing means are evenly spaced relative to the inner circumference of said drum.
Claim 7
Dependent Claim
18 words
The apparatus according to claim 5, wherein said chains comprise links, all of which have the same shape.
Claim 8
Dependent Claim
14 words
The apparatus according to claim 5, wherein said chains comprise links of differing shapes.
Claim 9
Dependent Claim
18 words
The apparatus according to claim 5, wherein said chains comprise links, all of which have the same size.
Claim 10
Dependent Claim
14 words
The apparatus according to claim 5, wherein said chains comprise links having differing sizes.
Claim 11
Dependent Claim
20 words
The apparatus according to claim 5, wherein said chains comprise plate links and hinge means for interconnecting said plate links.
Claim 12
Dependent Claim
123 words
The apparatus according to claim 5, wherein said second securing means are arranged adjacent said outlet end outside the drum proper, each of said second securing means comprising a first member, means for hinging said first member to the drum at said outlet end thereof, whereby said first member extends longitudinally of said drum, means for adjusting the angular position of said first member relative to the drum, a second member connected with one end to said plate member and extending with its free end radially inwardly relative to the drum, and means for adjustably connecting an end of the respective chain to said free end of the second member whereby the spacing between the chain and the inner drum wall is adjustable.
Claim 13
Dependent Claim
76 words
The apparatus according to claim 13, wherein said first member is hinged to the outer surface of the drum and has a portion which extends over the outlet end of the drum, said one end of the second member being connected to said portion of the first member whereby the angular position of the second member relative to a radial direction is adjustable by said adjustable means which secure the first member in different hinged positions.
Claim 14
Dependent Claim
21 words
The apparatus according to claim 5, wherein said second securing means comprise tensioning means for controlling the sag of each chain.
Claim 15
Dependent Claim
26 words
The apparatus according to claim 5, further comprising auxiliary chain means interconnecting said first mentioned chains and extending circumferentially from chain to chain inside said drum.
Claim 16
Dependent Claim
29 words
The apparatus according to claim 16, wherein a plurality of said auxiliary chain means are distributed along the length of the drum and connected to said first mentioned chains.
Claim 17
Dependent Claim
25 words
The apparatus according to claim 5, wherein said chains comprise links the effective surface of which varies in steps from said inlet toward said outlet.
Claim 18
Dependent Claim
24 words
The apparatus according to claim 5, wherein said chains comprise links the effective surface of which varies continuously from said inlet toward said outlet.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |