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US4012907A Expired / Lapsed US ⏱️ 0.0 years remaining

Exhaust apparatus

Assignee: Individual
•
Filing: 1975-09-24
•
Granted: 1977-03-22
•
Expires: 1995-09-24
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Abstract

Abstract A device for securement to or incorporating into the exhaust assembly of an internal combustion engine to improve efficiency thereof is disclosed. The device comprises a generally tubular housing open at both ends to enable passage of exhaust gases and a flow of air therethrough, and an axle coaxially positioned within the housing on a laterally extending support member, and a hub rotatably mounted on the axle, and two identical and opposed radially extending blades secured to the hub, the blades being obliquely angled with respect to the longitudinal axis of the hub, at least the forward edge of each blade extending inwardly providing inwardly pointing projections. In preferred construction, the inwardly pointing projection is formed between the forward edge of the blade and a forward inner edge of the blade, the said edges defining therebetween an angle of about 66° - 67°. In a further embodiment, at least the leading portion of each blade lies in a plane at an angle of about 72° with respect to the longitudinal axis of the hub.

Inventors

  • 👤 William James Crayton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 20:17
CPC Classifications
F; F02; F02B; F02B35/00; F02B35/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S416/00; Y10S416/03; Y10S60/00; Y10S60/902

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 162 words
Device for securement to or incorporating into the exhaust assembly of an internal combustion engine comprising a generally tubular housing open at both ends to enable passage of exhaust gases and a flow of air therethrough, an axle co-axially positioned within the housing on a laterally extending support member, a hub having a longitudinal axis rotatably mounted on the axle, and solely two, opposed, radially extending blades secured to the hub, the blades being obliquely angled with respect to the longitudinal axis of the hub with at least the forward portion of each blade being angled in a plane in the range of 70° to 75°, the forward and rearward portions of each blade extending inwardly providing pointed projections between the forward edge and the forward inner edge, and the rearward edge and the rearward inner edge of the blade, respectively, the forward edges, and the rearward edges, each defining at said projection an angle in the range of 62° to 72°.
Claim 2
Dependent Claim 162 words
Device for securement to or incorporating into the exhaust assembly of an internal combustion engine comprising a generally tubular housing open at both ends to enable passage of exhaust gases and a flow of air therethrough, an axle co-axially positioned within the housing on a laterally extending support member, a hub having a longitudinal axis rotatably mounted on the axle, and solely two, opposed, radially extending blades secured to the hub, the blades being obliquely angled with respect to the longitudinal axis of the hub with at least the forward portion of each blade being angled in a plane in the range of 70° to 75°, the forward and rearward portions of each blade extending inwardly providing pointed projections between the forward edge and the forward inner edge, and the rearward edge and the rearward inner edge of the blade, respectively, the forward edges, and the rearward edges, each defining at said projection an angle in the range of 62° to 72°.
Claim 3
Dependent Claim 25 words
Device according to claim 1, wherein the said forward edges, and the said rearward edges each define at said projection an angle of about 66°-67°.
Claim 4
Dependent Claim 20 words
Device according to claim 1, including means for securing the device to the exhaust pipe of an internal combustion engine.
Claim 5
Dependent Claim 29 words
Device according to claim 1, wherein the hub is mounted on the axle or pin or needle bearings, and the hub is provided with a grease fitting for lubrication.
Claim 6
Dependent Claim 29 words
Device according to claim 1 wherein the forward portion of each blade is angled in a plane of about 72° with respect to the longitudinal axis of the hub.
Claim 7
Dependent Claim 31 words
Device according to claim 1, wherein the housing is cylindrical and the outer edges of the blades is of arcuate shape corresponding with the degree of curvature of the cylindrical housing.

References Cited (Backward Citations)

DE115470C Cited
US1286365A Cited
US1506937A Cited
US3279684A Cited
US3538685A Cited
GB1351115A Cited
DD115470A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-03-21 1980-09-20 1981-03-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-03-21 1984-09-20 1985-03-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-03-21 1988-09-20 1989-03-22 $7700.00 Window Closed / Lapsed

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