IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0848700
(2004-05-19)
|
등록번호 |
US-7343833
(2008-03-18)
|
우선권정보 |
JP-2003-140548(2003-05-19) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Fuji Jukogyo Kabushiki Kaisha
|
대리인 / 주소 |
Smith, Gambrell & Russell, LLP
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
0 |
초록
▼
A breather apparatus of a crankcase, in which lubricating oil is circulated with economy of space and efficiently, is provided. An opening is formed in the top of a vertical wall of a case body, and a breather hole is formed in the top of an outer circumferential wall of the case body. A lubricating
A breather apparatus of a crankcase, in which lubricating oil is circulated with economy of space and efficiently, is provided. An opening is formed in the top of a vertical wall of a case body, and a breather hole is formed in the top of an outer circumferential wall of the case body. A lubricating-oil return port is formed in the bottom of the vertical wall of the case body, and a breather path communicating with the opening and the lubricating-oil return port is provided between the case body and a power-generator case used as a wall body attached thereto, and an air-breather path branching from the breather path and communicating with the breather hole is provided in the case body. When an oil-component mixed gas flowing through the opening to the outside of the case body hits an inner surface of the breather path, an oil component of the oil-component mixed gas is liquefied and flows into the lubricating-oil return port.
대표청구항
▼
What is claimed is: 1. A breather apparatus of an engine with the engine having a crankcase with a crank chamber accommodating lubricating oil and a case attached to said crankcase to form a housing for an output gear train, wherein said breather apparatus comprises: a vertical wall provided to sup
What is claimed is: 1. A breather apparatus of an engine with the engine having a crankcase with a crank chamber accommodating lubricating oil and a case attached to said crankcase to form a housing for an output gear train, wherein said breather apparatus comprises: a vertical wall provided to support a crankshaft of the engine and said vertical wall having an interior side facing the crank chamber and an exterior side facing away from the crank chamber; an outer circumferential wall extending away from the exterior side of said vertical wall for abutment with the case when the case is attached to the crankcase; an inside wall provided on the exterior side of said vertical wall and positioned inside said outer circumferential wall and extending away from said vertical wall for abutment with the case; a partition wall provided between said outer circumferential wall and said inside wall and extending away from said vertical wall for abutment with the case, and to thereby form a breather path together with said inside wall at a location external to said crank chamber; an opening formed on said vertical wall at an upper portion of said breather path to flow an oil-component mixed gaseous substance generated in the crank chamber into said breather path; a lubricating-oil return port formed on said vertical wall at a lower portion of said breather path to return an oil component of the oil-component mixed gaseous substance toward the crank chamber; a guide member provided on the interior side of said vertical wall and extending from said lubricating-oil return port toward a bottom portion of the crank chamber to guide the oil component into the lubricating oil accommodated in the crank chamber; and a notched portion formed on said partition wall to flow out a gaseous component of the oil-component mixed gaseous substance to outside of the engine. 2. The breather apparatus according to claim 1, wherein an air-breather path is formed between the partition wall and the outer circumferential wall. 3. The breather apparatus according to claim 2, further comprising a breather hole formed on the outer circumferential wall, wherein said breather hole communicates with said breather path. 4. The breather apparatus according to claim 1, wherein the breather path is formed to extend downwardly from the opening to the lubricating-oil return port. 5. The breather apparatus according to claim 1, wherein the breather path and the air breather path are separated by the partition wall. 6. The breather apparatus according to claim 1, wherein the breather path is arranged to be positioned radially internal to the air breather path. 7. A breather apparatus for use in an engine, with the engine having a crankcase with a crank chamber and a casing for an output gear train, with the crankcase being secured to the casing, said breather apparatus comprising: a vertical wall of the crankcase, with the vertical wall having an internal surface, an external surface and a crankshaft reception aperture and wherein the internal surface of the vertical wall is exposed to lubricating oil in the crank chamber; an outer circumferential wall provided on the external surface of said vertical wall and extending off from the external surface of said vertical wall to provide a close-off relationship relative to the casing when the casing is secured to the crankcase; an inside wall provided on the external surface of said vertical wall and positioned radially internal to said outer circumferential wall, said inside wall also extending away from said vertical wall to provide a close-off relationship relative to the casing when the casing is secured to the crankcase; a partition wall provided between the outer circumferential wall and said inside wall, said partition wall extending away from the external surface of said vertical wall to form a close-off relationship with the casing, and said partition wall being arranged to form a breather path relative to said inside wall; a feed port with an opening that enables a flow through of an oil-component mixed gaseous substance generated in the crank chamber to the breather path; a lubricating-oil return port provided with an opening at a lower region of the breather path to return an oil component of the oil-component mixed gaseous substance toward the crank chamber; and a communication port formed in the partition wall, which the communication port being positioned to provide for inertia separation of the oil component of the oil-component mixed gaseous substance from a more gaseous component of the oil-component mixed gaseous substance, with the separated oil component being directed toward said lubricating-oil return port and the more gaseous component of the oil-component mixed gaseous substance being directed to an air breather path in communication with said communication port. 8. The breather apparatus according to claim 7, further comprising: a guide member provided on the internal surface of said vertical wall, said guide member extending from the lubricating-oil return port, which is formed in a lower region of said vertical wall, toward a lower region of the crank chamber to guide the returned oil component to a lubricating oil supply in the crank chamber. 9. The breather apparatus according to claim 7, wherein the opening of said feed port is provided at an upper region of the vertical wall. 10. The breather apparatus according to claim 7, wherein the communication port is defined by a break in the partition wall. 11. The breather apparatus according to claim 7, wherein the breather path is formed to extend downwardly from the opening of said feed port to the lubricating-oil return port. 12. The breather apparatus according to claim 7, wherein the breather path and the air breather path are separated by the partition wall. 13. The breather apparatus according to claim 7, wherein the breather path is arranged to be positioned radially internal to the air breather path. 14. A breather apparatus for use in an engine, with the engine having a crankcase with a crank chamber and a casing for an output gear train, with the casing being supported by the crankcase, said breather apparatus comprising: a vertical wall of the crankcase, with the vertical wall having an internal surface and an outer surface with the internal surface of the vertical wall being exposed to lubricating oil in the crank chamber; an outer circumferential wall extending between the outer surface of said vertical wall and the casing; an inside wall extending between the outer surface of said vertical wall and the casing and positioned radially internal to said outer circumferential wall; a partition wall provided between the outer circumferential wall and said inside wall, and said partition wall being arranged to form a breather path relative to said inside wall; said breather apparatus further comprising a feed port having an opening to enable a flow through of an oil-component mixed gaseous substance generated in the crank chamber to the breather path, and a lubricating-oil return port provided at a lower region of the breather path to return an oil component of the oil-component mixed gaseous substance toward the crank chamber; and a communication port formed in the partition wall, which the communication port being positioned to provide for inertia separation of the oil component of the oil-component mixed gaseous substance from a more gaseous component of the oil-component mixed gaseous substance, with the separated oil component portion being directed toward said lubricating-oil return port and the more gaseous component of the oil-component mixed gaseous substance being directed to an air breather path in communication with said communication port. 15. The breather apparatus according to claim 14, further comprising: a guide member provided on the internal surface of said vertical wall, said guide member extending from the lubricating-oil return port which is provided in the vertical wall toward a lower region of the crank chamber to guide the returned oil component to a lubricating oil supply in the crank chamber. 16. The breather apparatus according to claim 14, wherein the opening of the feed port is provided at an upper region of the vertical wall. 17. The breather apparatus according to claim 14, wherein the communication port is defined by a break in the partition wall. 18. The breather apparatus according to claim 14, wherein the breather path is formed to extend downwardly from the opening of the feed port to the lubricating-oil return port. 19. The breather apparatus according to claim 14, wherein the breather path and the air breather path are separated by the partition wall. 20. The breather apparatus according to claim 14, wherein the breather path is arranged to be positioned radially internal to the air breather path.
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