US3885774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparing and dispensing mixtures of concrete and fibres
Assignee: Caledonian Mining Co Ltd
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Filing: 1973-07-18
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Granted: 1975-05-27
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Expires: 1993-07-18
Abstract
Abstract A mixing machine comprising a feed for at least one of the materials to be mixed which incorporates a rotatable scroll or worm and a hopper for a second material to be mixed, the discharge outlets of the or each of the feed scrolls or worms and of the hopper, communicating with a common rotating blending scroll or worm the hopper having a mesh or screen on which fibres can be loaded, either the hopper being reciprocable across the outlet to the feed scroll or the hopper and screen being relatively reciprocal.
Inventors
- 👤 David Michael Harris
- 👤 James Albert Harvey
- 👤 John Alfred Clipston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:43
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/08; B28C5/10; B28C5/12; B01; B01F; B01F33/00; B01F33/80; B01F33/805; B28C5/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
A mixing machine particularly adapted for use in the production of a fibrous mix, said machine comprising, a first hopper for a first feedstock, a first feed screw disposed in fixed relation to said first hopper, said first feed screw being adapted to receive the first feedstock discharge from said first hopper, a blending scroll having first and second charging ports, said blending scroll being positioned relative to said first feed screw to receive through said first charging port the first feedstock discharge metered from said first feed screw, and a fiber hopper having a screen fixed at the outlet thereof onto which fibers may be loaded, said hopper being positioned to discharge said fibers directly into said second charging port provided for said blending scroll, and said hopper being reciprocable relative to said secOnd charging port for discharging fibers within said fiber hopper into said second charging port.
Claim 2
Dependent Claim
149 words
A mixing machine particularly adapted for use in the production of a fibrous mix, said machine comprising, a first hopper for a first feedstock, a first feed screw disposed in fixed relation to said first hopper, said first feed screw being adapted to receive the first feedstock discharge from said first hopper, a blending scroll having first and second charging ports, said blending scroll being positioned relative to said first feed screw to receive through said first charging port the first feedstock discharge metered from said first feed screw, and a fiber hopper having a screen fixed at the outlet thereof onto which fibers may be loaded, said hopper being positioned to discharge said fibers directly into said second charging port provided for said blending scroll, and said hopper being reciprocable relative to said secOnd charging port for discharging fibers within said fiber hopper into said second charging port.
Claim 3
Dependent Claim
70 words
A mixing machine as set forth in claim 1, said machine further comprising, a second hopper for a second feedstock, and a second feed screw disposed in fixed relation to said second hopper, said second feed screw being adapted to receive the second feedstock discharge from said second hopper, and said second feed screw being positioned to meter the second feedstock into said firt charging port of said blending scroll.
Claim 4
Dependent Claim
33 words
A mixing machine as set forth in claim 2 wherein the rotational speeds of said two feed screws are adjustable relative one to the other, and are adjustable relative to said blending scroll.
Claim 5
Dependent Claim
25 words
A mixing machine as set forth in claim 1, said machine further including drive means interconnected with said fiber hopper for reciprocating said fiber hopper.
Claim 6
Dependent Claim
26 words
A mixing machine as set forth in claim 1, said second charging port being located downstream of said blending scroll relative to said first charging port.
Claim 7
Dependent Claim
63 words
A mixing machine as set forth in claim 5 including a delivery tray adapted to receive a supply of fibers, said delivery tray being cooperatively connected with said hopper to maintain the level of fibers in the hopper substantially constant during use of said machine, and vibrator means secured to said delivery tray for feeding the fibers off said tray into said hopper.
Claim 8
Dependent Claim
67 words
A mixing machine as set forth in claim 1 including a rotary blower unit fixed relative to said blending scroll for receiving the fibrous mix discharged from said blending scroll, and an air pressure port connected with said rotary blower unit, said air pressure port being adapted to receive pressurized air for ejecting the fibrous mix from the rotary blowing unit into a discharge hose without surging.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |