US3765505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise suppressed venturi power unit
Assignee: Vac-U-Max
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Filing: 1972-11-15
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Granted: 1973-10-16
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Expires: 1992-11-15
Abstract
Abstract Apparatus are provided for suppression of noise in a venturitype vacuum generating power unit by means of application of a resilient tubular extension to the exhaust end of the venturi and/or enveloping a portion of a fiberglass muffler surrounding said exhaust end with a thin film of resilient plastic material.
Inventors
- 👤 F Pendleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:46
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/14; F04F5/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
In a vacuum generating power unit having a venturi actuated by a source of high pressure air and a muffler of air-permeable fiberglass surrounding said venturi, the improvement comprising a flexible, resilient tubular extension mounted on the exhaust end of said venturi and situated within the confines of said muffler, the end of said extension being spaced from the end of said muffler adjacent the exhaust end of said venturi.
Claim 2
Dependent Claim
70 words
In a vacuum generating power unit having a venturi actuated by a source of high pressure air and a muffler of air-permeable fiberglass surrounding said venturi, the improvement comprising a flexible, resilient tubular extension mounted on the exhaust end of said venturi and situated within the confines of said muffler, the end of said extension being spaced from the end of said muffler adjacent the exhaust end of said venturi.
Claim 3
Dependent Claim
50 words
A power unit according to claim 1 which is further provided with a film of resilient plastic material about the outer periphery of said fiberglass muffler extending from the end of said muffler adjacent the exhaust end of said venturi and overlying at least the said flexible resilient tubular extension.
Claim 4
Dependent Claim
39 words
A power unit according to claim 1 wherein said extension projects beyond the exhaust end of said venturi by a distance of about 30 to 40 percent the length of said venturi measured from its exhaust to intake ends.
Claim 5
Dependent Claim
67 words
In a vacuum generating power unit having a venturi actuated by a source of high pressure air and a muffler of air-permeable fiberglass surrounding said venturi, the improvement comprising a film of resilient plastic material about the outer periphery of said fiberglass muffler extending from the end of said muffler adjacent the exhaust end of said venturi and overlying at least the exhaust end of said venturi.
Claim 6
Dependent Claim
67 words
In a vacuum generating power unit having a venturi actuated by a source of high pressure air and a muffler of air-permeable fiberglass surrounding said venturi, the improvement comprising a film of resilient plastic material about the outer periphery of said fiberglass muffler extending from the end of said muffler adjacent the exhaust end of said venturi and overlying at least the exhaust end of said venturi.
Claim 7
Dependent Claim
48 words
A power unit according to claim 4 which is further provided with a flexible resilient tubular extension mounted on the exhaust end of the said venturi and extending beyond said end and situated within the confines of said muffler, said film of resilient plastic material overlying said extension.
Claim 8
Dependent Claim
28 words
A power unit according to claim 4 which is further provided with a cloth covering overlying said film of resilient plastic material and retaining said film in place.
Claim 9
Dependent Claim
28 words
A power unit according to claim 5 which is further provided with a cloth covering overlying said film of resilient plastic material and retaining said film in place.
Claim 10
Dependent Claim
48 words
A power unit according to claim 4 wherein said film of resilient plastic material extends from the end of said muffler adjacent the exhaust end of said venturi and up to about 40 to 45 percent the length of said venturi measured from its exhaust to intake ends.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |