Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7806041 | Linear actuator A cylinder body includes a first guide surface made up from first guide grooves and a first bulging portion, wherein a slide table is displaceably supported on the first guide surface via a guide mechanism. Additionally, guide members of a guide block that constitut... | 10/05/2010 |
| 7350454 | Cylinder unit for mounting on a cross member and/or a table of a device or machine for the deformation of workpieces A cylinder unit for mounting on a machine for the deformation of workpieces includes a cylinder block and a pressure plate which is arranged on the surface of the cylinder block which faces away from the fastening surface, wherein a plurality of pistons each having ... | 04/01/2008 |
| 7331768 | Pump with gauge A pump includes a base, a pumping set, a first joint, a gauge set, a second joint and a nozzle. The base includes a socket. The gauge set includes a gauge, a housing for receiving the gauge and a tube extending from the housing. The pumping set includes a cylinder i... | 02/19/2008 |
| 7290477 | Linear drive A linear drive has a drive housing and a carriage guide for relative motion in the direction of a principal axis. The carriage possesses a row of openings on it with several first carriage openings, whereas the drive housing has a row of openings on the housing side... | 11/06/2007 |
| 7252032 | Fluid actuator A fluid actuator configured for achieving extended cycle life and reduced overall actuator height. The actuator may include a nesting arrangement between portions of the actuator to reduce overall height and provide stability. The actuator may also join movable memb... | 08/07/2007 |
| 7252486 | Hand-operated inflator A hand-operated inflator with dual cylinder is provided. Once the cylinders are pulled out on two sides of the central block to form a line axially, and a clamp plate at mid point in between the two cylinders is turned to the transversal position to lock the cylinde... | 08/07/2007 |
| 7165487 | Cylinder protective apparatus for preventing strange noise Disclosed is a cylinder protective apparatus for preventing strange noise in which an impact damper is fixed to an inner side of a cylinder cover to prevent collision between the cylinder cover and a cylinder or a cylinder guide from occurring, which may be caused b... | 01/23/2007 |
| 7134644 | Compressed air balancer The invention concerns a compressed air balancer (1) for raising, holding and lowering a load, comprising a cable drum (4) which is rotatable and displaceable along its axis of rotation for rolling up and unrolling a cable holding the load, a housing w... | 11/14/2006 |
| 7033525 | High conductivity polyaniline compositions and uses therefor The present invention describes compositions formed from polyanaline and carbon nanotubes, which exhibit enhanced conductivity and which provide uses in electronic circuit applications. ... | 04/25/2006 |
| 7033066 | Hydraulic actuator assembly with rotation restraint A hydraulic actuator assembly comprises a pair of hydraulic actuators having cylinders, pistons, and piston rods that are ganged together for extension of their respective piston rods in longitudinally opposite directions wherein at least one of the actuators compri... | 04/25/2006 |
| 6971234 | Zero-turn hydrostatic transaxle A pair of zero-turn, hydrostatic transaxles (HZTs) that may be joined to form an integrated, zero-turn, hydrostatic transaxle. Each of the hydrostatic transaxles are further comprised of a casing carrying a hydraulic pump driven by an input shaft, a hydraulic motor ... | 12/06/2005 |
| 6968688 | Two-cycle hot-gas engine A two-cycle hot-gas engine comprising an expansion piston in a heatable cylinder member and a compression piston in a coolable cylinder member. The expansion piston and the compression piston are disposed along a common axis. ... | 11/29/2005 |
| 6957531 | Center section for a hydrostatic transaxle A center section for a hydraulic pump and motor mounted in a transaxle casing. The center section has a protuberance formed thereon, a pair of flat surfaces separate from the protuberance and at least one fastener opening formed in the center section for receiving a... | 10/25/2005 |
| 6907817 | Linear actuator A linear actuator having a low profile and a long stroke is provided. The actuator includes a housing integrally connected to a telescoping piston. The piston may be extended by a fluid such as inflation gas provided by an inflation gas generator in fluid communicat... | 06/21/2005 |
| 6896495 | Cylinder head and valve plate assembly for reciprocating compressor A reciprocating compressor that includes a cylinder block with a plurality of cylinder bores. A piston is positioned in each bore. Each piston is mounted to move in response to the a crankshaft, causing each piston to reciprocate within the cylinder bore. The compre... | 05/24/2005 |
| 6775976 | Zero-turn hydrostatic transaxle A pair of substantially mirror image, zero-turn, hydrostatic transaxles (HZTs) that may be joined to form an integrated, zero-turn, hydrostatic transaxle. The control arm and brake mechanism associated with the HZTs can be mounted on either the inboard or outboard s... | 08/17/2004 |
| 6622612 | Pump, particularly plunger pump A pump, particularly a plunger pump, comprises a crank mechanism oscillating a plunger in a housing and an elastic sealing device fastened to the plunger. The sealing device provides a pressure-tight sealing with respect to a lower housing space containin... | 09/23/2003 |
| 6619244 | Expansible chamber engine This engine 1 relies on a flywheel having a flywheel axis and an undulating cam surface. A piston with a roller at its base is positioned in a cylinder such that the roller abuts the undulating cam surface at some radial distance from the flywheel axis. T... | 09/16/2003 |
| 6497173 | Aggregate of pressure cylinders An aggregate (10') of pressure medium cylinders (11', 12') are used especially where there is required a relatively large length of stroke. At least a first (11') and at least a second (12') pressure medium cylinder are arranged by the side of each other ... | 12/24/2002 |
| 6419459 | Pump fluid cylinder mounting assembly A mounting assembly for mounting a pump to a fluid cylinder comprising a tie rod threaded at one end and providing a second end drivingly engageable with a sleeve-like threaded connection for clamping attachment directly into the cylinder block by the dir... | 07/16/2002 |
| 6345568 | Fluid pressure device with reversible mounting mechanism Mounting grooves 31a for a position sensor are respectively formed in a first face 20a and a second face 20b facing each other of a casing 20, a fixing hole 35a passing through the casing between the opposite faces is formed in a position which overlaps t... | 02/12/2002 |
| 5983779 | Positive displacement pump for liquid and gases A positive displacement type pump used for applications such as pressurizing beverage dispensing containers, filling fire extinguishers, and pressuring welding tanks. CO2 or similar fluids are drawn into and discharged through the pump by a rec... | 11/16/1999 |
| 5957032 | Air-operated brake actuator mounting Brake actuator housings (120) are provided with mounting studs (105, 125) which are spaced from each other a standard predetermined distance so that smaller brake actuators can be mounted to a bracket (5) on a vehicle by way of the same apertures (108) as... | 09/28/1999 |
| 5924353 | Durable oil well pump of fitting ceramics cylinder A durable oil well pump having fitted ceramic cylinders. Two metal retainers are fitted at two ends of the ceramic liner barrels. A cement or adhesive, which is resistant to pressure and temperature is placed in the annular clearance among the liner barre... | 07/20/1999 |
| 5884549 | Linear actuator A linear actuator comprising a guide section formed along a longitudinal direction to protrude on a bottom surface of a slide table, a pair of guide blocks formed mutually opposingly and seperated from each other by a predetermined spacing distance on an ... | 03/23/1999 |
| 5676038 | Actuator with slide table Piston rods are coupled to respective pistons movably disposed respective cylinder chambers defined in a cylinder body. The piston rods have distal ends connected to an end plate mounted on a slide table which is mounted for movement along a guide rail. W... | 10/14/1997 |
| 5533436 | Hand air pump having two actuators An air pump includes two operating rods slidably engaged in two cylinders and having an upper end extended outward of the cylinders. A block is secured to the upper ends of the operating rods. A coupler is rotatably secured to the upper portion of the blo... | 07/09/1996 |
| 5479847 | Dual-piston pump apparatus A dual-piston pump apparatus includes a pair of reciprocating sleeves within which a pair of reciprocating pistons are disposed. The pistons and sleeves are each supported on a frame for independent reciprocating movement along a line angled relative to h... | 01/02/1996 |
| 5465648 | Cylinder having a piston assembly capable of stopping once when having moved up and down every time A cylinder having a piston assembly capable of stopping once when having moved up and down every time including a housing having a cavity, a gear ring fixedly within the cavity of the housing, a main crankshaft fitted within the cavity of the housing and ... | 11/14/1995 |
| 5431087 | Extended stroke linear actuator assembly An array of symmetrically disposed piston-cylinder assemblies may be utilized to produce oppositely directed movements along a single force axis. Plumbing between the various cylinders may be external or internal, or a combination thereof, the exact form ... | 07/11/1995 |
| 5363741 | Slide actuator In a slide actuator, a central guide rail having V-shaped grooves defined therein and opened at 90 degree angles, is mounted on a cylinder body. A slide table is brought into engagement with the guide rail. Guide members having V-shaped grooves defined th... | 11/15/1994 |
| 5353687 | Pocket cylinder for sliding door A compact hydraulic cylinder for use in a recess of a sliding door of a waste processing system. The cylinder includes a housing containing a first cylinder rod extending from one end of the housing and second and third rods extending from an opposite end... | 10/11/1994 |
| 5333535 | Rodless cylinder A rodless cylinder for feeding a workpiece has a cylinder having a cylinder tube with a bore defined therein and a piston reciprocally movably disposed in the bore. The cylinder tube has a slit defined therein and extending longitudinally therealong, the ... | 08/02/1994 |
| 5323690 | Fluid actuator assembly for imparting rotational movement to a boom A linear movable apparatus for imparting rotational movement to a turntable is provided. The turntable is secured to a rotatably mounted shaft having a ring gear thereon for meshed engagement with gear teeth provided on a piston rod which extends between ... | 06/28/1994 |
| 5228543 | Sealed wet disc brake for vehicles A sealed vehicle wet disc brake has a brake housing and a piston housing which are fixedly interconnected and which receive a rotor. The two housings and rotor define an annular cavity which is sealed by appropriate rotary seals and in which is maintained... | 07/20/1993 |
| 5222424 | Two dimensional drive system An object of the present invention is to provide a two dimensional drive system driven by fluid pressure. The drive system of the present invention comprises: a pair of X-guides; a pair of Y-guides; an X-rod whose each end is slidably attached to each Y-g... | 06/29/1993 |
| 5046903 | Method and apparatus for conducting operation in pipe A method and an apparatus for conducting predetermined operations in the interior of a pipe with a cutter, in which the cutter is shifted so that a rotary axis of the cutter is angularly displaced about an axis extending along the pipe and is displaced in... | 09/10/1991 |
| 5031470 | Device for converting linear reciprocating motion to rotary motion An arrangement for converting linear motion from a power source to rotary motion, where the power source is intended to coact with a cam in a manner to produce rotary motion, this rotary motion being carried out by a shaft. The invention is characterized ... | 07/16/1991 |
| 5020422 | Piston/cylinder assembly A compact lightweight piston/cylinder assembly having a body provided with a plurality of adjacent chambers, each chamber having a piston reciprocally mounted therein. Each piston is secured to a piston guide member which reciprocally moves in the body wi... | 06/04/1991 |
| 5016523 | Adjustable mounting apparatus for air-operated diaphragm brakes An air-operated diaphragm spring brake (10) is provided with a mounting means (16) which permits adjustment of the position of the pneumatic ports (30, 32) on the brake with respect to the vehicle. The mounting means (16) comprises a plate (84) mounted to... | 05/21/1991 |
