Patent US3901349A successfully refreshed from Google Patents.
US3901349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granulator with sound absorbing housing
Assignee: Beloit Corp
•
Filing: 1974-05-20
•
Granted: 1975-08-26
•
Expires: 1994-05-20
Abstract
Abstract A granulator-hopper combination has a housing which is formed with double walls forming an open air space therebetween. Openings through the inner wall place the housing interior in communication with the air space, whereby this housing acts as a volume resonating muffler.
Inventors
- 👤 Donald B Denoyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:34
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/172
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
109 words
A granulator comprising: a housing, a granulating means within the housing, said housing having an entrance means for introducing therein material to be granulated, and at least a portion of the housing comprising a double wall including inner and outer walls forming an air space therebetween, and perforations in the inner wall placing the interior of the housing into open communication with the air space, said perforations being arranged such that at least some of the sound waves passing through are reflected back into the interior of the housing to interfere with newly emitted sound waves of the same frequency, so as to function as a volume resonating muffler.
Claim 2
Dependent Claim
109 words
A granulator comprising: a housing, a granulating means within the housing, said housing having an entrance means for introducing therein material to be granulated, and at least a portion of the housing comprising a double wall including inner and outer walls forming an air space therebetween, and perforations in the inner wall placing the interior of the housing into open communication with the air space, said perforations being arranged such that at least some of the sound waves passing through are reflected back into the interior of the housing to interfere with newly emitted sound waves of the same frequency, so as to function as a volume resonating muffler.
Claim 3
Dependent Claim
32 words
A granulator according to claim 1, including duct means passing through the outer one of said double walls of the housing for introducing air into or removing air from said air space.
Claim 4
Dependent Claim
108 words
A granulator according to claim 1, said housing forming a hopper above the granulating means and said entrance means comprising a feed opening into the upper part of the hopper, said perforations being located at least in the vicinity of said feed opening. 4. A granulator according to claim 1, said inner wall forming a hopper having a lower section which is adjacent to a portion of the granulator means and an upper section extending upwardly from the lower section, the outer wall comprising a box-like structure completely surrounding the said inner wall to form therewith said air space, and an entranceway extending outwardly through the box-like structure.
Claim 5
Dependent Claim
14 words
A granulator according to claim 3, said double walled part including the entire hopper.
Claim 6
Dependent Claim
33 words
A granulator according to claim 3, said feed opening communicating with an entranceway extending horizontally into the upper part of the hopper, and including at least one movable curtain covering said feed entrance.
Claim 7
Dependent Claim
41 words
A granulator according to claim 3, the entire hopper section being of said double walled construction, the inner and outer walls being of similar shape throughout and spaced apart to form said air space which is of essentially uniform thickness throughout.
Claim 8
Dependent Claim
13 words
A granulator according to claim 7, the inner and outer walls being metal.
Claim 9
Dependent Claim
21 words
A granulator according to claim 8, including a layer of synthetic sound attenuating material lining the interior of the outer wall.
Claim 10
Dependent Claim
39 words
A granulator according to claim 4, including a base, said granulating means and said hopper mounted on the base, a motor means mounted on the base for driving the granulating means, and said box-like enclosure also enclosing said base.
Claim 11
Dependent Claim
24 words
A granulator according to claim 10, including mounting means for attaching the base to the box-like structure so as to be vibration isolated therefrom.
Claim 12
Dependent Claim
30 words
A granulator according to claim 4, the inner and outer walls being of metal and including a layer of synthetic sound attenuating material on the interior of the box-like structure.
Claim 13
Dependent Claim
26 words
A granulator according to claim 11, said mounting means including elastomeric sHear mountings interconnecting the bottom of the base to the bottom of the box-like enclosure.
Claim 14
Dependent Claim
19 words
A granulator according to claim 4, said box-like enclosure including a frame and panels removably attached to the frame.
References Cited (Backward Citations)
US3866708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |