US4367807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound absorber for compressed-air operated apparatuses, in particular compressed air vibrators
Assignee: FINK WILLY
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Filing: 1981-05-29
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Granted: 1983-01-11
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Expires: 2001-05-29
Abstract
Abstract The sound absorber includes a main body (1), a housing component (2) attached thereon and a cap (3) threaded onto the main body. The compressed air exiting from the compressed-air vibrator flows from a first chamber (4) into a second chamber (5) provided with labyrinth-like baffles (7) and from there into a larger third chamber (6). The relieved compressed air then flows outside through an annular outlet slit (8a). Through rotation of the cap (3) there can be varied the cross-section of the outlet slit (8a). The cap (3) thereby also serves as a throttle valve. The sound absorber is insensitive to oil-containing compressed air and, without an auxiliary throttle valve, facilitates a correlatable throttle of the exiting compressed air.
Inventors
- 👤 Willy Fink
- 👤 Alex Fehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:58
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/11; B25D17/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A sound absorber for compressed air-operated apparatuses, comprising a body having an inlet connector, connectable to an outlet aperture of the air-operated apparatus, and further comprising a plurality of sequentially arranged relief chambers for the compressed air, said inlet connector being coupled to a first chamber (4) having first through-bores (4a) extending therefrom to a second chamber (5), which includes an elongate, annular hollow chamber having an outer wall and contains therein labyrinth-like baffles (7), said second chamber (5) further being connected by second through-bores (5a) to a third chamber (6) which includes third through-bores (6a) extending to an annular outlet slit (8a), and said outlet slit having an adjustable cross-section.
Claim 2
Dependent Claim
111 words
A sound absorber for compressed air-operated apparatuses, comprising a body having an inlet connector, connectable to an outlet aperture of the air-operated apparatus, and further comprising a plurality of sequentially arranged relief chambers for the compressed air, said inlet connector being coupled to a first chamber (4) having first through-bores (4a) extending therefrom to a second chamber (5), which includes an elongate, annular hollow chamber having an outer wall and contains therein labyrinth-like baffles (7), said second chamber (5) further being connected by second through-bores (5a) to a third chamber (6) which includes third through-bores (6a) extending to an annular outlet slit (8a), and said outlet slit having an adjustable cross-section.
Claim 3
Dependent Claim
52 words
A sound absorber as claimed in claim 1, said annular outlet slit (8a) comprising an opening formed between said outer wall of the second chamber (5) and a cap (3) threaded onto said body and having internal threads (3a) therein, such that the slit is adjustable by rotation of the cap (3).
Claim 4
Dependent Claim
59 words
A sound absorber as claimed in claim 1, said first through-bores (4a) being radially directed between the first chamber (4) and the second chamber (5), said second through-bores (5a) being oppositely directed between the second chamber (5) and the third chamber (6), and said third through-bores (6a) being arranged between the third chamber (6) and the outlet slit (8a).
References Cited (Backward Citations)
US2046017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |