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| Number | Title | Issue Date |
| 8141444 | Bearing structure for a reciprocating shaft in a reciprocating saw A reciprocating shaft assembly in a reciprocating saw moves in a reciprocal motion and drives a saw blade via a blade holder. At least one bore is formed in an end of the reciprocating shaft assembly opposite the blade holder. A pin fixed to the saw passes through t... | 03/27/2012 |
| 7798028 | Transmission system A transmission system made of gears and bearings. The system improves the efficiency of force transfer between rotational motion and rectilinear motion. To accomplish this, the gears and bearings are assembled to allow maximum torque output during force input and re... | 09/21/2010 |
| 7685896 | Fluid mixing apparatus A reciprocating drive assembly is disclosed for use in a fluid mixer to impart reciprocating movement along a longitudinal axis to a shaft carrying a mixing head. The drive assembly includes a housing, a flywheel mounted for rotation about a rotational axis, a crank... | 03/30/2010 |
| 7516680 | Strain energy shuttle apparatus and method An apparatus and method for providing a torque to an external member to assist in twisting or deforming the external member. In one implementation the apparatus is useful for providing a force to a torque tube to assist in rotating, bending or twisting a wing, an ai... | 04/14/2009 |
| 7370624 | Piston engine with integrated balance shafts A piston engine with a compensation shaft unit, wherein a window surrounded by a flange is provided on the crankcase thereof. The flange forms a separating surface to which the housing of the compensation shaft unit is fixed by means of screws. In order to ensure cl... | 05/13/2008 |
| 7368039 | Distiller employing cyclical evaporation-surface wetting A distillation unit (10) employs a rotary heat exchanger (32) forming a multiplicity of evaporation chambers (56) into which a liquid to be purified is sprayed for evaporation. Spray arms (58) spray at a steady rate into all of the evapor... | 05/06/2008 |
| 7360511 | Opposed piston engine A two-cycle, opposed piston engine with side-mounted crankshafts and cylinders isolated from mechanical stresses of the engine includes tailored cooling of cylinders and symmetrical cooling of the interior surfaces of piston crowns. Each opposed piston includes a co... | 04/22/2008 |
| 7251896 | Hair clipper with pivot head The clipper has a cylindrical housing including a handle containing a battery and motor and a head pivotally mounted on the handle. The head carries a stationary blade and a reciprocating blade. Motion is transmitted from the motor to the reciprocating blade through... | 08/07/2007 |
| 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 |
| 7240392 | Park safe mechanism for wiper systems A windshield wiper drive linkage is provided for use in a wiper system. The linkage includes a crank arm connectible to an output shaft of a drive motor. A drive arm is pivotally connected to the crank arm for movement between first and second angular positions abou... | 07/10/2007 |
| 7237473 | Actuator for pneumatic valve A pneumatic valve includes a housing having an inlet port and a delivery port and an exhaust port. A valve element is movable in the housing to control air flow between the inlet port and the delivery port and the exhaust port. The valve includes a rolling element a... | 07/03/2007 |
| 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 |
| 7163193 | Water flow-controlling device for a cooling system of a vehicle A water flow-controlling device has a tube, a shaft, a block, a washer and a reciprocating assembly. The tube has a front opening, a rear opening, a side opening and a rear bracket. The openings communicate with one another. The rear bracket is mounted in the tube n... | 01/16/2007 |
| 7156056 | Two-cycle, opposed-piston internal combustion engine In a two-cycle, opposed-piston internal combustion engine with optimized cooling and no engine block, the opposed pistons are coupled to a pair of crankshafts by connecting rods that are subject to substantially tensile forces acting between the pistons and the cran... | 01/02/2007 |
| 7152523 | Press machine A drive mechanism drives a slide in a cycle along a centerline. The slide includes a press center symmetrical with a frame centerline. A frame includes guides aligned with the press center and the slide to eliminate rotative force upon the slide during operation and... | 12/26/2006 |
| 7152556 | Linear to rotational motion converter A mechanism or “motion converter” including cylinder, piston, yoke, 2 crankshafts and 2 gears converts linear motion of piston to rotary motion (or reverse) of crankshafts without creating the lateral force applied to the piston. Kinematics characteristics of th... | 12/26/2006 |
| 7121074 | Balanced epicyclic sickle drive A counterbalancing epicyclic sickle drive has a pair of oppositely rotating weights that offset the inertial forces of the sickle during its abrupt acceleration and deceleration at opposite ends of its path of travel. One of the weights rotates with the main shaft o... | 10/17/2006 |
| 7111525 | Crank shaft The invention relates to a crank shaft having a guide groove allowing the movement of a crank pin so as to adjust the reciprocating distance of a piston according to the rotating direction. The crank shaft comprises a rotation shaft for inducing the rotating movemen... | 09/26/2006 |
| 7108077 | Power tool A power tool (10) with a housing (12) which accommodates a driven shaft (32) for holding a material-removing tool (40) and which sets the driven shaft into rotary oscillating motion capable of being produced by an eccentric (22) ro... | 09/19/2006 |
| 7069804 | Gear linkage device with real time check A gear linkage device with real time check. The gear linkage device with real time check includes a first gear link and a second gear link. The first gear link includes a flange provided with a notch and a plurality of first toothed portions on the lateral surface t... | 07/04/2006 |
| 7040417 | Drilling systems The present invention discloses, in certain aspects, systems and methods for producing cyclical impacts and, in certain aspects for moving a drilling apparatus for drilling a borehole in a formation, the system in certain embodiments including a housing with a longi... | 05/09/2006 |
| 7028647 | Variable compression ratio connecting rod for internal combustion engine A variable compression ratio connecting rod for an internal combustion engine includes a large end adapted for attachment to a crankshaft and a small end adapted for attachment to a piston. An adjustable four-bar link system extends between and links the large end a... | 04/18/2006 |
| 7013800 | Mechanical press The object of this invention is to provide a mechanical press that presents no inconvenience in press operations despite its low height, providing great stability and excellent durability. The invention comprises a slide guiding mechanism provided at an upper... | 03/21/2006 |
| 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 |
| 6907943 | Electric hammer It is, accordingly, an object of the present invention to provide an electric hammer with improved construction, while ensuring the vibration reduction performance. According to the present invention, a representative electric hammer may include a hammer bit, a driv... | 06/21/2005 |
| 6745638 | Device mounted onto a slider crank for generating a displacement of a part mounted onto the slide in relation to the latter A device on a slider crank for generating a motion relative to the a slider (press ram 5) of a part (ejecting spring pin 6) mounted on the slider, wherein such motion is taken off a crankpin (1) upon rotation of the crankpin around a crankshaft ... | 06/08/2004 |
| 6598493 | Multiple crank drive for working machines, in particular for diaphragm pumps A multiple crank drive for working machines, in particular for diaphragm pumps, with a crankshaft, which is disposed in a housing and which exhibits at lest two bearings, can be driven by a drive, in particular a gear, and in turn drives by a crank drive,... | 07/29/2003 |
| 6481345 | Slide driving method for link type transfer press and link type transfer press A link type transfer press is driven by continuously dwelling the slide in the vicinity of the top dead center thereof with the use of a link mechanism. With this arrangement, a motion index angle of a feeder can be taken by a large degree even though the... | 11/19/2002 |
| 6443651 | Ramming device comprising a vibration reducing guide cylinder A working device, especially a ramming device for compacting soil, comprises a housing which belongs to an upper mass, and has a working mass which can be linearly driven back and forth with regard to the upper mass. The working mass is linearly guided vi... | 09/03/2002 |
| 6371008 | Water-raising pump Water-raising pump for drawing water in a ground water table, which pump comprises a tube connecting the surface to the water table to be pumped, a rod carrying the pistons, which is connected to a drive mechanism installed at the surface for imparting to... | 04/16/2002 |
| 6352004 | Working device with mass balancing at the crank mechanism A working device, especially a ramming device for compacting soil, or a hammer, has a crank mechanism for producing a controlled vibration. The crank mechanism is coupled with a set of springs. According to the invention, the crank disk belonging to the c... | 03/05/2002 |
| 6311612 | Link adjustment member A mechanical press having a variable drive arrangement. The press includes a link drive which drives a crankshaft. The drive altering mechanism includes adjustment means which changes the position of the link drive, thereby altering the drive mechanism of... | 11/06/2001 |
| 6289754 | Drive apparatus for a forming machine A drive unit for a forming machine, comprising a rotary drive and a knuckle-joint drive for a gear transmission operating a ram, the knuckle-joint drive being operationally connected through a gear transmission to the rotary drive. To improve the drive ri... | 09/18/2001 |
| 6276232 | Stroke length regulator A stroke length regulator of small dimensions and simple construction, provided with a cam for converting an eccentric movement into a reciprocating movement, a cylindrical body around which this cam is fitted, and a crank member fitted slidably in this c... | 08/21/2001 |
| 6240794 | Crank assembly A crank assembly for a piston machine having at least one piston reciprocable in a cylinder and a piston rod connecting the piston to the crank assembly for converting the reciprocating movement of the piston into a rotary movement of the crank assembly o... | 06/05/2001 |
| 6210125 | Water system with both electric motor power and manual pedal power, for a reciprocating pump A water system includes a reciprocating pump operated by pedal and motor delivered solar power, including one-way engagement clutch elements preventing hazardous pedal movement and potential motor damage. The pumpstand includes a housing in which a foot p... | 04/03/2001 |
| 6164147 | Adjustable link motion press A mechanical press having a variable drive arrangement. The press includes a main gear which drives a crankshaft. The drive altering mechanism includes a two piece crown with the main gear connected to the upper crown and the crankshaft connected to the l... | 12/26/2000 |
| 6155136 | Gear shaft assembly and method of making the same A gear shaft assembly for use with a pump and a method of making the same are gear shaft of the present invention. The disclosed assembly includes a housing, a stepped shaft, and a gear rotationally disposed on the shaft. The shaft has a first end dispose... | 12/05/2000 |
| 6112607 | Slant hole pumping unit A slant hole pumping unit includes a base mounting a support structure. A drive system is mounted on the support structure and is connected to a bridle strap assembly for reciprocating same. A constraint link assembly includes a lower end pivotally connec... | 09/05/2000 |
| 6112606 | Piston supporting structure for stirling cycle machine The present invention is intended to prevent vibration of a piston while reciprocating the piston without frictional contact by replacing a cross head for preventing the vibration of the piston with a leaf spring fixed by a rod at the lower end of the pis... | 09/05/2000 |
