US4195607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow-by gas recirculating device
Assignee: Toyota Motor Corp
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Filing: 1978-09-07
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Granted: 1980-04-01
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Expires: 1998-09-07
Abstract
Abstract A blow-by gas recirculating device includes an inlet pipe in communication with the intake passage for an automobile engine, and a heat-insulating member. Particularly, the inlet pipe communicates between a blow-by gas producing source and a heat-insulating member positioned between a carburetor and an intake manifold, all forming part of an intake system for the engine. The heat-insulating member has two intake through-holes which form part of the intake passage for the engine and an inlet-pipe-admitting hole which extends from the outer side-surface of the member to the peripheral surface of one of the intake through-holes. The inlet pipe, one end of which is disposed in the inlet-pipe-admitting hole, has an average coefficient of linear expansion of no less than 16.7×10 -6 /deg. in a temperature range of -20° to 200° C., and a modulus of longitudinal elasticity of no more than 12980 kg/mm 2 . The end of the inlet pipe is positioned in the inlet-pipe-admitting hole and an adhesive is applied. The blow-by gas producing source may comprise the crank case or a cylinder head cover. In the latter case, the positive crank-case ventilating pipe connects the cylinder head cover to the intake system for the engine.
Inventors
- 👤 Yasumasa Nagasaka
- 👤 Haruki Furukawa
- 👤 Takao Maeda
- 👤 Masatsugu Tsukatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:09
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F02; F02F; F02F7/00; F02F7/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A blow-by gas-recirculating device for use in an engine having a blow-by gas-producing source and an intake system, comprising: an inlet pipe for receiving the gas from the gas-producing source and communicating the gas to the intake system, a member formed of heat-insulating material and having at least one through-opening forming part of the intake system, means forming part of said member defining an inlet-pipe-admitting hole extending from an outer surface of said member to the peripheral surface of said one through-opening in said member, said inlet pipe being positioned within said inlet-pipe-admitting hole in said member, and an adhesive for securing said inlet pipe and said member one to the other, said inlet pipe being formed of a metal having a coefficient of linear expansion no less than 16.7×10 -6 /deg., and a modulus of longitudinal elasticity no more than 12980 kg/mm 2 .
Claim 2
Dependent Claim
145 words
A blow-by gas-recirculating device for use in an engine having a blow-by gas-producing source and an intake system, comprising: an inlet pipe for receiving the gas from the gas-producing source and communicating the gas to the intake system, a member formed of heat-insulating material and having at least one through-opening forming part of the intake system, means forming part of said member defining an inlet-pipe-admitting hole extending from an outer surface of said member to the peripheral surface of said one through-opening in said member, said inlet pipe being positioned within said inlet-pipe-admitting hole in said member, and an adhesive for securing said inlet pipe and said member one to the other, said inlet pipe being formed of a metal having a coefficient of linear expansion no less than 16.7×10 -6 /deg., and a modulus of longitudinal elasticity no more than 12980 kg/mm 2 .
Claim 3
Dependent Claim
24 words
A blow-by gas-recirculating device according to claim 1 in combination with the blow-by gas-producing source, said source comprising the crank case of the engine.
Claim 4
Dependent Claim
41 words
A blow-by gas-recirculating device according to claim 1 in combination with the blow-by gas-producing source, said source comprising a cylinder head cover, said communicating means including an intermediate pipe connecting said cylinder head cover to the intake system for the engine.
Claim 5
Dependent Claim
71 words
A blow-by gas-recirculating device according to claim 1, wherein said inlet pipe is bent to a predetermined radius prior to positioning said pipe in said inlet-pipe-admitting hole, the peripheral surface of said inlet-pipe-admitting hole and the outer peripheral surface of said inlet pipe when inserted into said hole defining a clearance therebetween, said adhesive being provided in said clearance to secure said inlet pipe and said member one to the other.
Claim 6
Dependent Claim
65 words
A blow-by gas-recirculating device according to claim 1 wherein the peripheral surface of at least part of said inlet-pipe-admitting hole is tapered, and wherein a flange is carried by said member between the tapered hole part and said through-opening, said flange having an aperture therethrough forming the remaining portion of said inlet-pipe-admitting hole, said aperture lying at the smaller end of the tapered hole part.
Claim 7
Dependent Claim
31 words
A blow-by gas-recirculating device according to claim 1 wherein said member has a second through-opening forming part of the intake system, said second through-opening being disposed adjacent the first mentioned opening.
Claim 8
Dependent Claim
83 words
A blow-by gas-recirculating device according to claim 4 wherein the peripheral surface of at least part of said inlet-pipe-admitting hole is tapered, and wherein a flange is carried by said member between the tapered hole part and said through-opening, said flange having an aperture therethrough forming the remaining portion of said inlet-pipe-admitting hole, said aperture lying at the smaller end of the tapered hole part, said member having a second through-opening forming part of the intake system and adjacent the first mentioned opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |