US3740932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pre cleaner
Assignee: ROSS K PETERSEN US
•
Filing: 1971-05-10
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Granted: 1973-06-26
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Expires: 1991-05-10
Abstract
Abstract An air pre-cleaner mounted on the air intake pipe of an internal combustion engine and connected to an exhaust aspirator mounted on the engine exhaust pipe. The pre-cleaner has a cylindrical housing having an air inlet for circumferentially directing air and foreign materials to a separation chamber. A plate baffle having a peripheral edge portion spaced from the inside wall of the housing separates a low pressure chamber from the separation chamber. A clean air exit passage, coupled with the air intake pipe of the engine, opens into the center of the separation chamber. The aspirator withdraws air from the low pressure chambers over the top of the baffle whereby air is continuously moved through the housing in a circumferential direction separating foreign materials from the air moving into the air intake pipe of the internal combustion engine.
Inventors
- 👤 L Borsheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:32
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/08; B; B01; B01D; B01D45/00; B01D45/12; F02M35/022; Y; Y10; Y10S; Y10S55/00; Y10S55/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
275 words
A device for separating foreign particulate materials from a fluid comprising: housing means having a continuous upright cylindrical inside surface surrounding a cylindrical separation chamber and a low pressure chamber located generally adjacent the upper portion of the separation chamber; a first means having fluid inlet passage means open to the bottom of said separation chamber for directing fluid in a circular and upward direction into the separation chamber; sleeve means having a first fluid outlet means open to the central section of the separation chamber; a second means having a second fluid outlet passage generally tangentially open to the low pressure chamber; baffle means located in said housing means separating the separation chamber from the low pressure chamber, said baffle means having a continuous outer peripheral edge portion, the entire peripheral edge portion being spaced inward from the inside wall of the housing means to connect the separation chamber with the low pressure chamber with an uninterrupted restricted throat, said baffle means extends downwardly and inwardly toward the inside wall of the housing means, said throat extends downwardly along the inside wall of the housing means, said second fluid outlet passage connectable to suction means to continuously withdraw fluid and foreign particulate materials from the low pressure chamber wherby particulate materials in the fluid flowing through the fluid inlet passage means are separated from the fluid moving to the first fluid outlet means in the separation chamber, said particulate materials moving circumferentially and upwardly along the inside surface of the housing means through the restricted throat into the low pressure chamber and tangentially out of the housing means through the second fluid outlet passage.
Claim 2
Independent Claim
275 words
A device for separating foreign particulate materials from a fluid comprising: housing means having a continuous upright cylindrical inside surface surrounding a cylindrical separation chamber and a low pressure chamber located generally adjacent the upper portion of the separation chamber; a first means having fluid inlet passage means open to the bottom of said separation chamber for directing fluid in a circular and upward direction into the separation chamber; sleeve means having a first fluid outlet means open to the central section of the separation chamber; a second means having a second fluid outlet passage generally tangentially open to the low pressure chamber; baffle means located in said housing means separating the separation chamber from the low pressure chamber, said baffle means having a continuous outer peripheral edge portion, the entire peripheral edge portion being spaced inward from the inside wall of the housing means to connect the separation chamber with the low pressure chamber with an uninterrupted restricted throat, said baffle means extends downwardly and inwardly toward the inside wall of the housing means, said throat extends downwardly along the inside wall of the housing means, said second fluid outlet passage connectable to suction means to continuously withdraw fluid and foreign particulate materials from the low pressure chamber wherby particulate materials in the fluid flowing through the fluid inlet passage means are separated from the fluid moving to the first fluid outlet means in the separation chamber, said particulate materials moving circumferentially and upwardly along the inside surface of the housing means through the restricted throat into the low pressure chamber and tangentially out of the housing means through the second fluid outlet passage.
Claim 3
Dependent Claim
59 words
The device of claim 1 wherein: said baffle means is a plate member located in said housing means to separate the separation chamber from the low pressure chamber, said outer periPheral edge portion of the baffle means being the forward edge of the plate member, said edge spaced from and extended downwardly adjacent said inside surface of the housing.
Claim 4
Dependent Claim
34 words
The device of claim 1 wherein: the outer peripheral edge portion of the baffle means is uniformly spaced from the inside wall of the housing means whereby the throat has a generally uniform width.
Claim 5
Dependent Claim
37 words
The device of claim 1 wherein: said housing means has a plurality of spaced circumferentially extended vanes located only in the first inlet means to direct the incoming fluid in a circumferential direction around the separation chamber.
Claim 6
Dependent Claim
57 words
The device of claim 1 wherein: said housing means has a base, said base having said sleeve means with a passageway comprising the first fluid outlet means and a plurality of spaced circumferentially extended overlapped vanes located only in the first fluid inlet means to direct the incoming fluid in a circumferential direction around the separation chamber.
Claim 7
Dependent Claim
17 words
The device of claim 1 wherein: the low pressure chamber is substantially smaller than the separation chamber.
Claim 8
Independent Claim
215 words
A device for separating foreign particulate materials from a fluid comprising: housing means having a continuous upright cylindrical inside surface surrounding a cylindrical separation chamber and a low pressure chamber located generally adjacent the upper portion of the separation chamber; a first means having fluid inlet passage means open to the bottom of said separation chamber for directing fluid in a circular direction and upward direction into the separtion chamber; sleeve means having a first fluid outlet means open to the central section of the separation chamber; second means having a second fluid outlet passage generally tangentially open to the low pressure chamber; baffle means located in said housing means separating the separation chamber from the low pressure chamber, said baffle means having a continuous outer peripheral edge portion, the entire peripheral edge portion being spaced inwardly from the inside wall of the housing means to connect the separation chamber with the low pressure chamber with an uninterrupted restricted throat, said baffle means being a plate member located in said housing means to separate the separation chamber from the low pressure chamber, said outer peripheral edge portion of the baffle means being the forward edge of the plate member, said edge being spaced from and extended downwardly adjacent the inside surface of the housing means.
Claim 9
Independent Claim
215 words
A device for separating foreign particulate materials from a fluid comprising: housing means having a continuous upright cylindrical inside surface surrounding a cylindrical separation chamber and a low pressure chamber located generally adjacent the upper portion of the separation chamber; a first means having fluid inlet passage means open to the bottom of said separation chamber for directing fluid in a circular direction and upward direction into the separtion chamber; sleeve means having a first fluid outlet means open to the central section of the separation chamber; second means having a second fluid outlet passage generally tangentially open to the low pressure chamber; baffle means located in said housing means separating the separation chamber from the low pressure chamber, said baffle means having a continuous outer peripheral edge portion, the entire peripheral edge portion being spaced inwardly from the inside wall of the housing means to connect the separation chamber with the low pressure chamber with an uninterrupted restricted throat, said baffle means being a plate member located in said housing means to separate the separation chamber from the low pressure chamber, said outer peripheral edge portion of the baffle means being the forward edge of the plate member, said edge being spaced from and extended downwardly adjacent the inside surface of the housing means.
Claim 10
Dependent Claim
15 words
The device of claim 7 wherein: the baffle means is a generally flat plate member.
Claim 11
Dependent Claim
31 words
The device of claim 7 wherein: said edge portion of the baffle means is uniformly spaced from the inside surface of the housing whereby said throat has a generally uniform width.
Claim 12
Dependent Claim
17 words
The device of claim 7 wherein: the low pressure chamber is substantially smaller than the separation chamber.
Claim 13
Dependent Claim
56 words
The device of claim 7 wherein: said housing means has a base, said base having sleeve means with a passageway comprising the first fluid outlet means and a plurality of spaced circumferentially extended overlapped vanes located only in the first fluid inlet means to direct the incoming fluid in a circumferential direction around the separation chamber.
Claim 14
Dependent Claim
38 words
The device of claim 7 wherein: said housing means has a plurality of spaced circumferentially extended vanes located only in the first fluid inlet means to direct the incoming fluid in a circumferential direction around the separation chamber.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |