US3750842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing for an air cooled engine
Assignee: Individual
•
Filing: 1970-12-04
•
Granted: 1973-08-07
•
Expires: 1990-12-04
Abstract
Abstract An air cooled internal combustion engine housing having an inner wall, an outer wall spaced from said inner wall to form a cavity therebetween, and a high density metallic material substantially completely filling the cavity between the two walls. Cooling fins are provided on the outer wall to dissipate heat from the engine and a hood having a laminated layer of high density material and an outer protective layer thereon surrounds a portion of the housing.
Inventors
- 👤 H Mccaffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:29
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F16L55/033; F02; F02B; F02B77/00; F02B77/11; F02B77/13; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
A sound absorbing housing including a cylinder and a crankcase for an engine, said housing comprising, an inner metallic wall for said engine, a layer of lead having an inner surface in intimate contact with the outer surface of said inner wall, an outer metallic wall having an inner surface in intimate contact with the outer surface of said layer of lead, and means securing said inner and outer walls to said layer of lead to form a sound absorbing laminate, said layer of lead remaining solid at the operating temperature of said engine.
Claim 2
Dependent Claim
94 words
A sound absorbing housing including a cylinder and a crankcase for an engine, said housing comprising, an inner metallic wall for said engine, a layer of lead having an inner surface in intimate contact with the outer surface of said inner wall, an outer metallic wall having an inner surface in intimate contact with the outer surface of said layer of lead, and means securing said inner and outer walls to said layer of lead to form a sound absorbing laminate, said layer of lead remaining solid at the operating temperature of said engine.
Claim 3
Dependent Claim
62 words
A sound absorbing housing for an engine, said housing comprising an inner metallic wall, a thin layer of metallic material secured to the outer surface of said inner wall, and an outer wall secured to the layer of material to form a laminate, said inner thin layer of metallic material is secured to said inner and outer walls by a visco-elastic adhesive.
Claim 4
Dependent Claim
62 words
A sound absorbing housing for an engine, said housing comprising an inner metallic wall, a thin layer of metallic material secured to the outer surface of said inner wall, and an outer wall secured to the layer of material to form a laminate, said inner thin layer of metallic material is secured to said inner and outer walls by a visco-elastic adhesive.
Claim 5
Dependent Claim
16 words
The housing according to claim 2 wherein said inner and outer walls are formed of aluminum.
Claim 6
Dependent Claim
28 words
The housing according to claim 2 wherein said thin layer is formed of a material having a higher density than the density of said inner and outer walls.
Claim 7
Dependent Claim
84 words
A sound attenuating structure for an engine, said structure comprising, a laminated housing having an inner wall and an outer wall spaced therefrom, and a layer of high density metallic material substantially filling the space between said inner and outer walls, a visco elastic material securing the entire inner and outer surfaces of said layer of high density material to the corresponding surfaces of said inner and outer walls, whereby noises emanating from the engine will be damped and attenuated by the laminated stRucture.
Claim 8
Dependent Claim
84 words
A sound attenuating structure for an engine, said structure comprising, a laminated housing having an inner wall and an outer wall spaced therefrom, and a layer of high density metallic material substantially filling the space between said inner and outer walls, a visco elastic material securing the entire inner and outer surfaces of said layer of high density material to the corresponding surfaces of said inner and outer walls, whereby noises emanating from the engine will be damped and attenuated by the laminated stRucture.
Claim 9
Dependent Claim
14 words
The structure according to claim 5 wherein said high density metallic material contains lead.
Claim 10
Dependent Claim
19 words
The structure according to claim 5 including means for dissipating heat from the outer surface of said outer wall.
Claim 11
Dependent Claim
54 words
A housing for an internal combustion engine, said housing including an inner metallic shell, an outer metallic shell spaced from said inner shell to form one or more cavities between said shells, a high density metallic material substantially completely filling said cavities and a visco elastic adhesive securing to said material to said sheets.
Claim 12
Dependent Claim
54 words
A housing for an internal combustion engine, said housing including an inner metallic shell, an outer metallic shell spaced from said inner shell to form one or more cavities between said shells, a high density metallic material substantially completely filling said cavities and a visco elastic adhesive securing to said material to said sheets.
Claim 13
Dependent Claim
23 words
The housing according to claim 8 wherein said metallic material is capable of melting at the operating temperature of the internal combustion engine.
Claim 14
Dependent Claim
87 words
A hood for reducing noise emanating from an engine, said hood including a number of walls for enclosing a portion of said engine and a laminate structure secured to said walls, said structure including a layer of lead having a inner surface and an outer surface, adhesive means securing the inner surface to the outer surface of said walls of said hood, an outer layer of high strength material, and adhesive means securing said high strength material to the entire outer surface of said layer of lead.
Claim 15
Dependent Claim
87 words
A hood for reducing noise emanating from an engine, said hood including a number of walls for enclosing a portion of said engine and a laminate structure secured to said walls, said structure including a layer of lead having a inner surface and an outer surface, adhesive means securing the inner surface to the outer surface of said walls of said hood, an outer layer of high strength material, and adhesive means securing said high strength material to the entire outer surface of said layer of lead.
Claim 16
Dependent Claim
32 words
The hood according to claim 10 including a layer of viscoelastic material securing said lead to said hood and a layer of visco-elastic adhesive securing said high strength material to said lead.
References Cited (Backward Citations)
US1316912A
Cited
US1763082A
Cited
GB567567A
Cited
US2764250A
Cited
US2881751A
Cited
US2956637A
Cited
US3540425A
Cited
US3534828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |