Patents by Inventor Xiaopo Ma
Xiaopo Ma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8393308Abstract: A switchable cam follower of a valve train of a combustion engine, which has an external lever that encompasses an internal lever. The levers are pivotably moveable relative to one another at a valve-side end. The cam follower has a stop for a gas exchange valve on an underside on the valve-side end and a complementary face on the other end for a support element. The cam follower has a start face on an upper side for at least one high-lift cam. In one receptacle of the internal lever a coupling element is seated, which is displaceable longitudinally and can be brought into engagement in sections in case of coupling with a driving surface of the external lever. Also, at least one torsion is clamped between the two levers.Type: GrantFiled: March 18, 2010Date of Patent: March 12, 2013Assignee: Schaeffler Technologies AG & Co. KGInventors: Bogyu Kang, Xiaopo Ma
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Patent number: 7926455Abstract: The finger follower has an inner and outer body and a torsional lost motion spring positioned at its lash adjuster end of the outer body. The torsional lost motion springs have a short leg that abuts the outer body and a long leg that contacts the inner body. The torsional spring is located above the pivot point of the finger follower so as to provide a low mass moment of inertia and to reduce the weight over the valve stem end of the follower.Type: GrantFiled: June 3, 2008Date of Patent: April 19, 2011Assignee: Schaeffler KGInventors: Debora Manther, Yunshan Liu, Anna Strehlau, Richard Best, Xiaopo Ma
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Patent number: 7909007Abstract: The finger follower has an inner and outer body and a torsional lost motion spring positioned at its lash adjuster end of the outer body. The torsional lost motion spring has two helical parts each with a short leg that abuts the outer body and a long leg that contacts the inner body. The torsional spring is located above the pivot point of the finger follower so as to provide a low mass moment of inertia and to reduce the weight over the valve stem end of the follower.Type: GrantFiled: December 4, 2008Date of Patent: March 22, 2011Assignee: Schaeffler KGInventors: Debora Manther, Yunshan Liu, Anna Strehlau, Richard Best, Xiaopo Ma
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Patent number: 7839980Abstract: A cooling apparatus (10) for X-ray tube inserts (14) is provided. The apparatus comprises a flow director (20) that is configured to direct at least a portion of a flow of a coolant toward a window (30) of an X-ray tube insert. The flow director may incorporate a flow sleeve (208) of a plurality of nozzles (88).Type: GrantFiled: June 7, 2005Date of Patent: November 23, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Qing K. Lu, Xiaopo Ma, Kevin C. Kraft
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Publication number: 20100236507Abstract: Proposed is a switchable cam follower (1) of a valve train of a combustion engine, having an external lever (2) which is encompassing an internal lever (4) between its arms (3), which levers (2, 4) are pivotably moveable relative to one another on an axis (6) that is applied to a valve-side end (5), wherein the cam follower (1) has a stop (8) for a gas exchange valve on an underside (7) on the valve-side end (5) and on the other end (9) has a complementary face (10) for a support element, wherein the cam follower (1) has a start face (12) on an upperside (11) for at least one high-lift cam, wherein in one receptacle (13) of the internal lever (4) a coupling means (14) is seated, which is displaceable in the longitudinal direction and which can be brought into engagement in sections in case of coupling (high lift) with a driving surface (15) of the external lever (2) and wherein at least one torsion spring (16) as a lost-motion spring is clamped between the two levers (2, 4), which torsion spring is seated onType: ApplicationFiled: March 18, 2010Publication date: September 23, 2010Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO., KGInventors: Bogyu KANG, Xiaopo MA
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Publication number: 20090114177Abstract: The finger follower has an inner and outer body and a torsional lost motion spring positioned at its lash adjuster end of the outer body. The torsional lost motion spring has two helical parts each with a short leg that abuts the outer body and a long leg that contacts the inner body. The torsional spring is located above the pivot point of the finger follower so as to provide a low mass moment of inertia and to reduce the weight over the valve stem end of the follower.Type: ApplicationFiled: December 4, 2008Publication date: May 7, 2009Applicant: SCHAEFFLER KGInventors: Debora MANTHER, Yunshan LIU, Anna STREHLAU, Richard BEST, Xiaopo Ma
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Patent number: 7522706Abstract: An x-ray tube assembly (1) includes a cathode housing (30) which has a neck connected to a frame (14) of the x-ray tube assembly. An anode (10) is positioned within an evacuated chamber defined by the frame. To reduce overheating of the neck by backscattered electrons, a cooling collar (70, 70?, 70?) is positioned around the neck of the cathode housing. Cooling fluid enters the collar through a fluid inlet tube (72, 72?, 72?). A cover member (110, 110?, 110?) of the collar includes a wall (118, 118?, 118?) which defines an aperture (126, 126?, 126?) sized for receiving the neck of the cathode housing. Cooling fluid flows around an interior annular flow path (152, 152?) defined within the cover member and leaves the cover member through the aperture or associated notches. In this way, stagnation of the flow is minimized.Type: GrantFiled: January 5, 2005Date of Patent: April 21, 2009Assignee: Koninklijke Philips Electronics N.V.Inventors: Qing Kelvin Lu, Allan D. Kautz, Xiaopo Ma
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Publication number: 20080317210Abstract: An x-ray tube assembly (1) includes a cathode housing (30) which has a neck connected to a frame (14) of the x-ray tube assembly. An anode (10) is positioned within an evacuated chamber defined by the frame. To reduce overheating of the neck by backscattered electrons, a cooling collar (70, 70?, 70?) is positioned around the neck of the cathode housing. Cooling fluid enters the collar through a fluid inlet tube (72, 72?, 72?). A cover member (110, 110?, 110?) of the collar includes a wall (118, 118?, 118?) which defines an aperture (126, 126?, 126?) sized for receiving the neck of the cathode housing. Cooling fluid flows around an interior annular flow path (152, 152?) defined within the cover member and leaves the cover member through the aperture or associated notches. In this way, stagnation of the flow is minimized.Type: ApplicationFiled: January 5, 2005Publication date: December 25, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONIC, N.V.Inventors: Qing Kelvin Lu, Allan D. Kautz, Xiaopo Ma
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Publication number: 20080310596Abstract: A cooling apparatus (10) for X-ray tube inserts (14) is provided. The apparatus comprises a flow director (20) that is configured to direct at least a portion of a flow of a coolant toward a window (30) of an X-ray tube insert. The flow director may incorporate a flow sleeve (208) of a plurality of nozzles (88).Type: ApplicationFiled: June 7, 2005Publication date: December 18, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Qing K. Lu, Xiaopo Ma, Kevin C. Kraft
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Publication number: 20080295789Abstract: The finger follower has an inner and outer body and a torsional lost motion spring positioned at its lash adjuster end of the outer body The torsional lost motion springs have a short leg that abuts the outer body and a long leg that contacts the inner body. The torsional spring is located above the pivot point of the finger follower so as to provide a low mass moment of inertia and to reduce the weight over the valve stem end of the follower.Type: ApplicationFiled: June 3, 2008Publication date: December 4, 2008Applicant: SCHAEFFLER KGInventors: Debora MANTHER, Yunshan LIU, Anna STREHLAU, Richard BEST, Xiaopo MA