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| Number | Title | Issue Date |
| 7434560 | Balancing device for an engine With a view to reducing the load imposed by a cantilevered balancer weight on a balancer shaft bearing while balancing the inertia force generated by the balancer weights with the center of gravity of a piston and connecting road system, a balancing device for an en... | 10/14/2008 |
| 7373905 | Diesel aircraft engine The present invention is an engine, including two banks of cylinders in a flat, opposed cylinder arrangement and a crankshaft having a plurality of paired throws, the two throws of each respective pair of throws being disposed adjacent to each other and coplanar wit... | 05/20/2008 |
| 7367303 | Crankshaft of in-line four-cylinder engine In a crankshaft of an in-line four-cylinder engine, an arm that is closest to a flywheel has a greater average thickness in a direction of the rotation axis of the crankshaft than those of other arms. Two of the arms that are coupled to both sides of the third journ... | 05/06/2008 |
| 7364018 | Oil pump drive assembly An oil pump drive assembly for an automobile engine includes an oil pump and a drive shaft. The drive shaft is rotatably secured to the oil pump for actuating the oil pump in response to rotation of the drive shaft. The drive shaft extends between a pump end secured... | 04/29/2008 |
| 7343893 | Internal combustion engine An internal combustion engine includes a connecting rod that connects a crankpin and a piston. The connecting rod has first and second connecting rods, and a guide piston is disposed at a connecting portion between the first and second connecting rods. Deformed port... | 03/18/2008 |
| 7334553 | Balancer driven gear of engine A balancer driven gear of an engine, for the transfer of rotation of the crankshaft to a balancer shaft, is made up of a gear member, a bush member and elastic members and interposed therebetween. The bush member has a boss portion fixed to the balancer shaft, and a... | 02/26/2008 |
| 7318404 | Piston engine A piston engine has a crank assembly, a piston assembly, a crank case assembly and a cylinder head assembly. The crank assembly has a central axle, two counterweight blocks and a crank axle. The central axle has two connecting segments and two flanges. The flanges a... | 01/15/2008 |
| 7296553 | Engine balancer apparatus A balancer apparatus including a first balancer and a second balancer. The first balancer includes a first balance weight and the second balancer includes a second balance weight and wherein the first and second balance weights are asymmetrical. The first and second... | 11/20/2007 |
| 7281446 | Machine tool with machining head kept fixed by means of bars whose length is variable by magnetostriction A machine tool (1) for machining by chip removal, in which a machining head (2) operates while being positioned in a horizontal plane and is mounted on a vertical bed (3) to which it discharges the forces (F) by which it is axially stressed, thi... | 10/16/2007 |
| 7246533 | Reciprocating counterweight structure for a reciprocating saw A counterweight in a reciprocating saw counterbalances a reciprocating shaft assembly adapted to hold a saw blade. The counterweight is supported for reciprocating motion by slides which ride within slots formed in a housing adapted to hold the reciprocating mechani... | 07/24/2007 |
| 7234432 | Crankshaft for V-type six-cylinder engine A crankshaft for a V-type six-cylinder engine is equipped with first through sixth crankpins, first through fourth crank journals, and first through ninth arms for connecting the crank pins and the crank journals to each other. Of the first through ninth arms, the t... | 06/26/2007 |
| 7210373 | Crankshaft for a v-type internal combustion engine A crankshaft (1) includes a first to a sixth crank pin (41–46), a first to a fourth main journal (21–24) and a first to a ninth crank arm (61–69). At least the first, the second, the eighth and the ninth crank arms (61, 62, 68, 6... | 05/01/2007 |
| 7191742 | Diesel aircraft engine The present invention is an engine, including two banks of cylinders in a flat, opposed cylinder arrangement and a crankshaft having a plurality of paired throws, the two throws of each respective pair of throws being disposed adjacent to each other and coplanar wit... | 03/20/2007 |
| 7178501 | Crankshaft assembly of an internal combustion engine The invention is directed to a crankshaft (1) of an internal combustion engine including an internal combustion engine for a portable handheld work apparatus such as a motor-driven chain saw or the like. The invention is also directed to a method for making t... | 02/20/2007 |
| 7162797 | Method of correcting imbalance of a scroll compressor A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compr... | 01/16/2007 |
| 7152565 | Vibration prevention structure in engine In an engine having a propeller mounted on one end of a crankshaft, the vibrations on an end portion of the crankshaft opposite to the propeller are effectively suppressed with a pair of vibration pendulum type weights arranged outside the crankcase whereby it is po... | 12/26/2006 |
| 7137897 | Shaft comprising a part connected thereto by welding A shaft (1) with a co-rotating element (2) which is secured to it and has a surface located perpendicular to the axis (3) of the shaft, the welding taking place in the fillet formed between the seating surface (4) of the shaft (1) ... | 11/21/2006 |
| 7127870 | Replacement lock lever for an automatic beverage filling machine Replacement lock levers and related methods are disclosed which accommodate adjustment to acceptable tolerances of the force applied to cans being filled by the platform lift cylinder assemblies of the automatic beverage filling machine, due to an eccentricity of th... | 10/31/2006 |
| 7117781 | Piston balancing system A piston pump or compressor has a dynamically balanced drive assembly in which nearly all of the rotational, oscillatory and axial forces on the rotating drive shaft are canceled. The piston is primarily balanced by adding an oscillating counter weight mounted to th... | 10/10/2006 |
| 7055439 | Interior contour for bore of a friction support bearing of a railway locomotive traction motor A contour or profile of a bore of a locomotive traction-motor support bearing structure, where such profile preserves the currently center-loading of the upper load zone but moves inboardly the lower load zone to a more general central location. The profile of the b... | 06/06/2006 |
| 7040273 | Mass balancing for internal combustion engine An internal combustion engine includes a crankcase, a cylinder, a piston, a crankshaft, and a piston connecting rod. A counterweight connects to the crankshaft through a counterweight connecting rod. The counterweight pivotally connects to the crankcase. The engine ... | 05/09/2006 |
| 7021268 | Crankshaft with airflow inducing surfaces A crankshaft is provided with a plurality of counterweights which are asymmetrically formed so that one surface has a shape which induces a flow of air and oil mist in a preselected and preferred direction. This shape also improves the aerodynamic characteristic of ... | 04/04/2006 |
| 7004135 | Engine starter unit In an engine starting unit, a gear switching clutch is fitted on one end of a main shaft, a power transmission gear train including a clutch gear rotating together with an input member of the gear switching clutch is provided between one end of a crankshaft and the ... | 02/28/2006 |
| 6990898 | Mechanical pressing machine A mechanical pressing machine includes a slider mounted on an input shaft at a location below a cam, and a sliding block and a balance weight mounted at locations above the cam. A first cam follower rotatably carried on the slider abuts against a lower surface of th... | 01/31/2006 |
| 6959683 | Crankshaft for an internal combustion engine A crankshaft has a helical drive gear formed as one of the crank webs at an end portion thereof. Another crank web outside of the drive gear is made in two parts, an integral balance weight mounting portion and a removable balance weight. In one embodiment, a cranks... | 11/01/2005 |
| 6912929 | Multi-piece crankshaft construction A multi-piece crankshaft having a shaft with two ends and in which the shaft is adapted to rotate about its shaft axis and a crankpin with at least one indentation. The shaft and crankpin are placed within a mold having a first mold cavity corresponding in shape to ... | 07/05/2005 |
| 6874458 | Balance system for single cylinder engine A balance system and method for balancing piston forces within a single cylinder internal combustion engine are disclosed. The balance system includes a crankshaft, a counterbalance assembly and a groove. The crankshaft includes a crankshaft portion, a crank arm, a ... | 04/05/2005 |
| 6860729 | Compressor having main and adjustable balancer portions A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compr... | 03/01/2005 |
| 6854358 | Compensating shaft assembly for piston engines A balance shaft unit for internal combustion engines consists of at least one balance shaft (6, 7) supported in a balance casing (5) and counterweights (8) connected onto it. In order to achieve maximum precision, reliable fastening and minimum ... | 02/15/2005 |
| 6820518 | Crankshaft assembly A crankshaft assembly for an internal combustion engine having a one-piece elongated shaft adapted to rotate about a longitudinal axis. The shaft includes a radially offset portion between the ends of the shaft, and this radially offset portion is spaced axially inw... | 11/23/2004 |
| 6772654 | Coriolis crankshaft A crankshaft being integrated with stemmed, inertia-forced lobes that increase engine and motor efficiency, in which a respective lobe extends and branches out to a single traversal side of crankshaft integration, and thus being right-angular to its integration. Ess... | 08/10/2004 |
| 6732697 | Inertial balancing system for internal combustion engine A reciprocating internal combustion engine balancing system includes multiple reciprocating balancers attached to the cylinder block at the front and rear ends of the crankshaft. The balancers are driven by cams integrated with the crankshaft cheeks which reciprocat... | 05/11/2004 |
| 6695601 | Self-balanced compressor crankshaft A hermetic compressor assembly including a compressor housing, a compression mechanism disposed in the housing, a motor disposed in the housing; and a crankshaft operatively coupling the compression mechanism and the motor and having an axis of rotation. ... | 02/24/2004 |
| 6684736 | Multi-piece crankshaft construction A multi-piece crankshaft having a shaft with two ends, an axis and adapted to rotate about its axis. A crankpin also has two ends and an axis parallel to but spaced radially outwardly from the shaft axis. The crankpin optionally has at least one indentati... | 02/03/2004 |
| 6682437 | Static unbalance-type balance shafts with axis alignment preservation A static unbalance-type balance shaft for canceling unbalance forces of an engine includes a principal bearing journal located adjacent a first end of the shaft and an outrigger bearing journal located adjacent the second end of the shaft. A first counter... | 01/27/2004 |
| 6681708 | Engine for planing boat An engine suitable for mounting in a small planing boat, which both lowers the center of the gravity of the boat, and enables a degree of freedom in arranging accessories. Balancers are arranged on the left and on the right of a crankshaft on a parting fa... | 01/27/2004 |
| 6659060 | Crankshaft drive for an internal-combustion engine A crankshaft drive for an internal-combustion engine includes a crankshaft, a connecting rod assembly coupled to the crankshaft, and a balancing shaft arranged parallel to the crankshaft and at a distance r from the crankshaft. A balancing weight extends ... | 12/09/2003 |
| 6626063 | High value static unbalance-type balance shafts A static unbalance-type balance shaft for rotating machinery such as a vehicle engine includes a longitudinal axis, a first bearing surface disposed away from a first end and a second bearing surface located adjacent a second end. A first balance shaft is... | 09/30/2003 |
| 6581495 | Balancer shaft There is provided an apparatus for a reduced mass balancer shaft that effectively balance first or second order imbalances in an internal combustion engine. The balancer shaft is symmetrical with offset masses that are equal in magnitude and opposite in d... | 06/24/2003 |
| 6412366 | Engine counterweight An improved counterweight for a crankshaft having a main body which is adapted to rotate about a predetermined axis. The main body includes a major lobe on one side of the axis and a diametrically opposed minor lobe. Two recessed surfaces extend on opposi... | 07/02/2002 |
