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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7475627 | Rotary to reciprocal power transfer device An apparatus to transfer power from rotary power to reciprocating power includes an odd numbered multi-lobed rotating cam that acts on a follower, which, in turn, causes or acts in response to reciprocation of pistons. The follower includes offset head portions and ... | 01/13/2009 |
| 7334514 | Balanced fluid-powered modular actuation system This invention provides a modular, efficient and self-feedback/balance, fluid-powered actuation system. This system comprises two basic modules; actuation module and positioning module, which are directly connected to each other. The actuation modules can be constru... | 02/26/2008 |
| 7287458 | Yoke mechanism for compressor A yoke structure for a compressor is disclosed, which is applied to a scotch yoke type reciprocating compressor. The yoke structure comprises a crankshaft (10); a crankpin (20) connected to the crankshaft (10), to rotate along a predetermined ro... | 10/30/2007 |
| 7249556 | Compressor with fortified piston channel A compressor is disclosed generally comprising a cylinder head mounted to a cylinder block having a cooling chamber and a piston channel via a bolt. A piston is disposed in the piston channel and has a contact portion that contacts the channel wall, which is integra... | 07/31/2007 |
| 7168664 | Assist rod and basket assembly A railroad switch assembly comprises a basket that directly actuates a torsional assist rod. The basket is located at a lower elevation than the assist rod, preferably in a hollow tie and preferably between the switch machine and the running rail. ... | 01/30/2007 |
| 7093528 | Seal and valve systems and methods for use in expanders and compressors of energy conversion systems An epicycling device with improved sealing. A housing is provided with adjacent walls spaced apart to allow a substantially planar partition to pass. A piston is linked eccentrically to a drive shaft and positioned within the housing, has a cross sectional shape for... | 08/22/2006 |
| 7028705 | High torque failsafe valve operator A fluid valve operator for moving a moveable valve element such as a disc (14) that is pressed forcefully against a surface of a valve frame (12). The valve operator includes first and second electric gear reduction motors (22, 24) that each has... | 04/18/2006 |
| 7007589 | Piston assembly A hydraulic pump includes a housing, at least two pistons mounted to the housing to rotate relative to the housing, and a transition arm coupled to each of the pistons to rotate therewith. The transition arm is set at a predetermined angle relative to a longitudinal... | 03/07/2006 |
| 6868774 | Shaft coupling and shifting mechanism for pneumatic pump Fluid pump assembly driven by a reciprocating piston, having an improved coupling between a driving shaft and a driven shaft and a fast-shifting switching mechanism for changing the direction of movement of the piston. ... | 03/22/2005 |
| 6692239 | Reciprocating compressor A reciprocating compressor of un-lubricating type, equipped with a cooling device including a cooling fan beneath a motor and provided with four gas compressors, each having a cylinder and a piston. The pistons of each gas compressor cooperate by converti... | 02/17/2004 |
| 6640689 | Double-rack-and-pinion swinging apparatus In air flow paths of a swinging apparatus in which racks are respectively provided to pistons of a pair for swinging in cylinder bores of a pair disposed in parallel in a casing, a pinion is engaged with the racks, and the pistons of the pair are synchron... | 11/04/2003 |
| 6571682 | Apparatus for converting circular motion to radial motion In accordance with one aspect of the present invention there is provided apparatus and a method for converting circular motion to radial motion. In one embodiment of the apparatus of the present invention, a mandrel is provided which includes a generally ... | 06/03/2003 |
| 6561774 | Dual diaphragm pump A dual diaphragm pump comprises a first chamber, a second chamber, a mechanical link, and a drive mechanism. The first chamber comprises a first cavity and a first diaphragm. The first chamber couples a pump inlet to a pump outlet. The second chamber comp... | 05/13/2003 |
| 6491304 | Cylinder having guide In a cylinder having a piston 2 and a cylinder body 3 having a piston chamber 4 in which said piston 2 is slidably accommodated, a guide shaft 9 extending toward the piston chamber 4 is provided on a head-side end wall 8 of the cylinder body 3, and the pi... | 12/10/2002 |
| 6394762 | Fuel pump A fuel pump comprising a first pumping plunger reciprocable within a first bore and defining, with the first bore, a first pumping chamber. A second pumping plunger is reciprocable within a second bore and defines, with the second bore, a second pumping c... | 05/28/2002 |
| 6289788 | Semi-rotary hydraulic actuator An actuator for rotating a shaft includes a housing having a first port, a second port and a drive track. A first drive means is coupled to the first port and a second drive means is coupled to the second port. An array of balls which are spaced apart by ... | 09/18/2001 |
| 6260470 | Hydraulic piston-cylinder-unit for a slewing drive The invention relates to a hydraulic piston-cylinder-unit (10) for a slewing drive with at least one piston, which can be slid in a cylinder and exhibits fastening means, by means of which the piston can be connected in such a manner to a coupling rod tha... | 07/17/2001 |
| 6189436 | Radial bellcrank actuator A radial bellcrank actuator comprising a piston with a circumferential piston groove, and a bellcrank attached to an output shaft. The bellcrank has a bellcrank piston lobe at one end, and a bellcrank output shaft lobe at the other. The bellcrank piston l... | 02/20/2001 |
| 6158968 | Fluid displacement apparatus with variable displacement mechanism A fluid displacement apparatus includes a cam rotor connected to a drive shaft and having a first arm extending therefrom. A plate is tiltably connected to the drive shaft. The plate has a surface disposed at an adjustable inclined angle relative to a pla... | 12/12/2000 |
| 6116146 | Radial piston machine The present invention relates to a radial piston machine including radial pistons which are guided in the direction of the piston axis in a housing, a driver which is coupled to the radial pistons, and an eccentric drive which is arranged inside the drive... | 09/12/2000 |
| 5960699 | Hydraulic pump unit The invention relates to a hydraulic pump unit with an electric drive motor and a radial piston pump that is provided as a return feed pump for a motor vehicle for a slip-regulated, hydraulic brake system. To drive the pump pistons, the invention provides... | 10/05/1999 |
| 5950427 | Fail-safe electric hydraulic actuator An electro-hydraulic valve actuator comprising an actuator casing; a piston/rack means in the casing having walls reciprocating linearly to effect linear movements, the reciprocating walls defining a center chamber therebetween and two outside chambers in... | 09/14/1999 |
| 5938224 | Hydraulic bicycle with conjugate drive motors and variable stroke crankshaft A device for transmitting power between mechanical movements which includes a fluid pump coupled to a first mechanical movement for pumping a fluid, a fluid motor coupled to a second mechanical movement and a manifold connecting the fluid pump and the flu... | 08/17/1999 |
| 5911564 | Control system for multiple engines The present disclosure is directed to a power plant, and especially two or more such power plants connected together. The power plant especially features a piston connected with a reciprocated but non-rotating piston rod which connects with a pump piston ... | 06/15/1999 |
| 5897302 | Reciprocating piston pump with radial cylinders based by a wire hoop spring against an eccentric shaft The invention is based on a reciprocating piston pump having two radial pistons disposed symmetrically to one another, which are drivable to a reciprocating motion by an eccentric disposed between them and are held in contact with the eccentric by a hoop ... | 04/27/1999 |
| 5887482 | Apparatus for mutual conversion between circular motion and reciprocal motion The apparatus comprises a lever member having a first regulator which is provided at an end of the lever member and functions as a force point, and a second regulator which is provided at another end of the lever member and functions as a movable fulcrum.... | 03/30/1999 |
| 5842405 | Eccentric arrangement for a reciprocating piston pump The present invention relates to an eccentric arrangement for a reciprocating piston pump, having a drive shaft drivable by a drive device, an eccentric part of a rubber-elastically deformable material is disposed on the drive shaft in a manner fixed agai... | 12/01/1998 |
| 5836234 | Single CAM reciprocating linked piston type engine A single cam reciprocating linked piston type engine utilizes a swing-link linking mechanism to make two pistons arranged at an included angle slide alternately up and down, or utilizes a linking-rod to make two pistons arranged on an identical axis recip... | 11/17/1998 |
| 5769616 | Submerged pump with coaxial opposing pistons, driven by double lobed camshaft The submerged pump according to the present invention comprises one or more modular pumping groups, each consisting of a balanced, coaxial and opposing piston couple 7 on spool wheels 10 and with a spring 12 return.... | 06/23/1998 |
| 5676037 | Apparatus for mutual conversion between circular motion and reciprocalmotion An apparatus for mutual conversion between circular motion and reciprocal motion includes a lever member which is rotatably mounted on a line connecting a rotational center and a circumference of a rotary disk, the lever member having a fulcrum, an action... | 10/14/1997 |
| 5657682 | Hose piston for transporting external objects along a flexible hose A hose piston is disposed inside a flexible hose which is filled with fluid and movable in any direction upon hydraulic pressure. The rollers of an external device are engaged on the exterior surface of the flexible hose and are located adjacent to the mi... | 08/19/1997 |
| 5649809 | Crankshaft and piston rod connection for a double diaphragm pump The invention relates to a double diaphragm pump having flexible diaphragms disposed in displacement spaces and connected and mechanically coupled to piston rods, the displacement spaces being communicated via check valves to a suction manifold on the one... | 07/22/1997 |
| 5638736 | Wave cam type compressor A wave cam 17 is rotatably supported by a drive shaft 13 in cylinder blocks 11, 12. Front and rear cam surfaces 17A, 17B of the wave cam 17 are defined by the surface of a predetermined imaginary cylindroid. Semi-spherical shoes 18, 19 are interposed betw... | 06/17/1997 |
| 5638738 | Air motor piston to crank linkage An air motor for hoists and the like utilizes opposed pistons interconnected by a rigid yoke having a single pivot link for each piston pair connected to the crank by means of standard press fit bearings which maintain yoke and piston alignment with the c... | 06/17/1997 |
| 5626054 | Load decoupler Device for absorbing lateral forces generated as a result of a linearly reciprocating pin causing rotation of a scotch yoke, the device including a guide block guided along a guide rod, the guide block carrying a yoke engaging pin as well as having oppose... | 05/06/1997 |
| 5617772 | Linear actuator A linear actuator has an actuator body having a through hole defined axially therein and an opening defined in an upper surface thereof, a pair of end blocks, a slide table reciprocally movable in the directions indicated by the arrows X, Y, a pair of cyl... | 04/08/1997 |
| 5575173 | Conjugate drive mechanism A motion converter employs a shuttle movable in a reciprocating fashion along a rectilinear path and having an aperture therein. One side of the aperture is defined by a first trackable profile and an opposite side of the aperture is defined by a second t... | 11/19/1996 |
| 5572904 | Oscillation lever arm engine An engine for generating rotational torque through the oscillating movement of lever arms. The inventive device includes an elongated cylinder having first and second opposed cylinder heads. A pair of pistons are oppositely disposed within the cylinder an... | 11/12/1996 |
| 5556267 | Double acting pump A pump has an extruded metal housing surrounding a square internal chamber accommodating a piston assembly with square pistons. An eccentric member and block assembly associated with a driven shaft reciprocates the piston assembly to pump fluid. The flow ... | 09/17/1996 |
| 5542340 | Wave cam type compressor A wave cam type compressor includes cylinder blocks. A drive shaft is rotatably supported in the center cylinder blocks. A plurality of cylinder bores are defined about the drive shaft in the cylinder blocks. A wave cam, mounted on the drive shaft, compri... | 08/06/1996 |
