US3675732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler for pneumatic motor
Assignee: Nordson Corp
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Filing: 1971-05-17
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Granted: 1972-07-11
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Expires: 1991-05-17
Abstract
Abstract A hydraulic pump and double acting air motor therefor including means for controlling the inlet and exhaust of air to and from the opposite sides of the piston in the air cylinder. A pilot valve operated by the air piston controls one operating valve for the cylinder and a pilot relay valve. The pilot relay valve controls another operating valve which is in reverse phase with respect to the first operating valve. A muffler which inhibits ice formation is operatively associated with the operating valves for muffling the noise of the air being exhausted from the air cylinder through the operating valves with minimal accumulation of ice.
Inventors
- 👤 Samuel R Rosen
- 👤 Alvin A Rood
- 👤 Donald R Scharf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
F; F01; F01B; F01B11/00; F01B23/00; F01B23/06; F01B31/00; F01B31/02; F01N; F01N1/00; F01N1/16; F01N1/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A device for muffling the noise generated by gas being exhausted from a compressible fluid motor, comprising an open sided box defining a chamber for receiving exhaust gases, a flexible closure plate adapted to cover the open side of said box with marginal portions thereof spaced slightly from the top edges of the side walls of said box to define narrow exhaust spaces, said plate being mounted to permit flexing thereof to move said marginal portions outwardly from said box in response to pressure in said chamber.
Claim 2
Independent Claim
87 words
A device for muffling the noise generated by gas being exhausted from a compressible fluid motor, comprising an open sided box defining a chamber for receiving exhaust gases, a flexible closure plate adapted to cover the open side of said box with marginal portions thereof spaced slightly from the top edges of the side walls of said box to define narrow exhaust spaces, said plate being mounted to permit flexing thereof to move said marginal portions outwardly from said box in response to pressure in said chamber.
Claim 3
Dependent Claim
36 words
The device of claim 1 including a thermal insulating means interposed between said device and said fluid motor to prevent chilling of adjacent parts of said fluid motor by conduction of heat to said muffler box.
Claim 4
Independent Claim
85 words
A device for muffling the noise generated by gas being exhausted from a compressible-fluid motor comprising a box defining a chamber for receiving exhaust gases, said box having a pair of adjacent walls with their adjacent edges spaced slightly from each other to define a narrow exhaust space, at least one of said walls being flexible and being mounted to permit flexing thereof to move its adjacent edge outwardly from said box in response to pressure in said chamber to thereby widen said exhaust space.
Claim 5
Independent Claim
85 words
A device for muffling the noise generated by gas being exhausted from a compressible-fluid motor comprising a box defining a chamber for receiving exhaust gases, said box having a pair of adjacent walls with their adjacent edges spaced slightly from each other to define a narrow exhaust space, at least one of said walls being flexible and being mounted to permit flexing thereof to move its adjacent edge outwardly from said box in response to pressure in said chamber to thereby widen said exhaust space.
Claim 6
Dependent Claim
33 words
The device of claim 3 wherein said flexible wall is a flexible closure plate secured to said box at points defining a line about which the adjacent edge of said plate is flexed.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |