Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 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 |
| 7225722 | Linear drive A linear drive has a drive housing on which a carriage is able to run. For guiding the carriage two guide units are provided, which jointly lie in a guide plane extending perpendicularly to the upright axis of the drive housing. The guide units flank the carriage on... | 06/05/2007 |
| 7207262 | Linear drive A linear drive having a drive housing on which a carriage runs to an adjustable extent. The carriage covers over a channel-like housing recess, which is delimited by two mutually side wall. For limiting the stroke of the carriage a first abutment is provided on it w... | 04/24/2007 |
| 7188481 | Adjustable damper actuator An actuator for controlling the position of a damper. It is an adjustable damper actuator that can actuate a damper to have positions that are other than fully open and fully closed. The actuator has adjustable stops for attaining a partially closed or partially ope... | 03/13/2007 |
| 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 |
| 6905108 | Control valve flow adjustment device A valve includes a fluid inlet passage having a fluid inlet, a fluid outlet passage, an orifice between the fluid inlet passage and the fluid outlet, and a moveable valve plug adapted to move with respect to the orifice to vary the flow of fluid between the fluid in... | 06/14/2005 |
| 6655256 | End stops for dual end stop actuator and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 12/02/2003 |
| 6612219 | Adaptor plate for dual end stop actuator and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 09/02/2003 |
| 6612220 | First adjust dual end stop actuator and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 09/02/2003 |
| 6604449 | Quarter-turn dual end stop actuator and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 08/12/2003 |
| 6604448 | Dual end stop actuator and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 08/12/2003 |
| 6598511 | Dual end stop actuator rotary drive and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 07/29/2003 |
| 6520277 | Tractor steering cylinder with internal adjustable steering stops A steering cylinder for a tractor with internal, adjustable steering stops that do not occupy packaging space beyond the cylinder itself. End caps of the cylinder, between the piston rod and the cylinder, serve as the stops. The end caps are threadably mo... | 02/18/2003 |
| 6446539 | Dual end stop actuator and method A dual end stop is provided for setting precise open and closed positions for the valve to which the pneumatic actuator is attached. In a preferred embodiment, a stop assembly housing contains two stop adjustment bolts as well as a cam that defines first ... | 09/10/2002 |
| 6371439 | Device for adjusting the central position of the pistons and the angular position of the pinion in a valve driving actuator A device for adjusting the central position of the pistons and the angular position of the pinion in a valve driving actuator comprises a tubular body in which are tightly movably arranged a first and second pistons having opposite racks, meshing with a c... | 04/16/2002 |
| 6145404 | Modular manipulation unit A modular manipulation unit is disclosed. The unit includes a body (11) formed of three extruded, profiled elements. The elements include a base plate (15), a top element or cover (16) fixed on the base plate, and an intermediate slide (17) arranged and g... | 11/14/2000 |
| 6014924 | Slide drive arrangement A slide drive device has a principal housing, in which at least one actuating element able to be driven linearly is arranged. Externally on the principal housing there is a slide kinetically coupled with the actuating element. Two stroke limiting means re... | 01/18/2000 |
| 5957029 | Linear thruster A linear thruster is disclosed in which a load beam is linearly moved by fluid power relative to a guide beam and a piston. The beams are multisided in cross-section to substantially increase the linear bearing area between the bodies and, thereby, substa... | 09/28/1999 |
| 5816131 | Fluid-controlled actuator assembly A fluid-controlled actuator assembly for a gearbox of a vehicle. The actuator is provided with a four-position mobile element, with a first and a second chamber separated in a sealed manner from the mobile element, and with auxiliary positioning elements ... | 10/06/1998 |
| 5732613 | Fluid operated rotary drive with position detector A fluid operated rotary drive, which possesses a drive means having an output drive shaft able to be driven for oscillating motion. On one axial side of the drive means a position detection means is arranged, which possesses an actuating member connected ... | 03/31/1998 |
| 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 |
| 5609090 | Actuator with protective end cap A fluid-powered rotary actuator for providing rotary movement between first and second external members. The actuator includes a cylindrical body with first and second ends. The body is adapted for coupling to the first external member, and a shaft extend... | 03/11/1997 |
| 5562017 | Reusable press fit connection of a hydraulic power apparatus and method of assembly An apparatus (10) including a housing (14) defining a chamber (16) and a movable piston (18, 100) dividing the chamber (16) into first and second chamber portions (20, 22). An apparatus (38, 40) directs fluid pressure into either the first or second chamb... | 10/08/1996 |
| 5511461 | Actuator with slide table An air cylinder has a cylinder body, a slide table movable along a guide rail on the cylinder body, a stopper block mounted on the cylinder body, a pair of adjustment bolts mounted on the slide table and spaced from each other with the stopper block inter... | 04/30/1996 |
| 5489006 | System and apparatus for limiting vehicle turning radius A vehicle steering control system and apparatus for controlling steering radius to prevent vehicle and surface damage and to provide improved low speed vehicle maneuverability. The steering control system and apparatus provides a first controllably limite... | 02/06/1996 |
| 5477772 | Actuator with protective end cap A fluid-powered rotary actuator for providing rotary movement between first and second external members. The actuator includes a cylindrical body with first and second ends. The body is adapted for coupling to the first external member, and a shaft extend... | 12/26/1995 |
| 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 |
| 5335583 | Stopper mounting structure for use on rodless cylinder In a rodless cylinder, a moving member which is moved along a cylinder body is reduced in height for the sake of compactness and stability. A stopper is mounted on a stopper support base, which is also reduced in height to preclude the possibilities of ob... | 08/09/1994 |
| 5322142 | Hydraulic auxiliary power steering This invention relates to a pressure turnoff device in the terminal positions of the steering deflection in an auxiliary power steering. In steering systems that reveal a working piston (2) that can be shifted in the steering housing, one inserts this tur... | 06/21/1994 |
| 5305683 | Pressure-medium actuated linear unit A pressure medium linear unit for handling devices for industrial manufacture includes a housing block, at least one operating cylinder for at least one piston, at least one piston rod, at least one guide rod, and guide elements for at least one piston ro... | 04/26/1994 |
| 5190263 | Locking mechanism for an actuator A locking mechanism for an actuator prevents the unauthorized operation of the actuator and also permits a viewer to determine whether the actuator is in a locked open, locked closed or unlocked position. The invention utilizes a clear cover guard which i... | 03/02/1993 |
| 5086864 | Hydraulic auxiliary-power steering device The invention is concerned with a device that cuts off pressure in the final positions of the steering movement in an auxiliary-power steering device. In steering devices that have movable working pistons in the steering gear housing, this cut-off device ... | 02/11/1992 |
| 5054372 | Adjustable shaft actuator A fluid-powered rotary actuator having a body with first and second ends, and a shaft extending generally coaxially within the body. The shaft is supported for rotational movement relative to the body by bearing races formed on the shaft first and second ... | 10/08/1991 |
| 5044254 | Reciprocating air motor A vibration cancellation device is provided for an air motor with a reciprocating drive piston. The device consists of an anti-phase piston which is axially aligned with the drive piston and reciprocates in the opposite direction of the drive piston. In o... | 09/03/1991 |
| 5024144 | Piston drive A piston drive e.g. for actuating a valve includes a piston which reciprocates in axial direction within a housing between two end positions, with one end position being defined by a worm drive including a manually actuated worm which actuates a worm whee... | 06/18/1991 |
| 5014598 | Fluid pressure actuator A fluid pressure actuator having two connected pistons movable in a cylinder, and having a gear rack associated therewith to engage a pinion attached to the shaft to be rotated. Adjustable travel stops are located on each end of the cylinder to control th... | 05/14/1991 |
| 4984508 | Piston drive A piston drive such as a piston drive for actuating a valve includes a piston which reciprocates between two end positions which are defined by respective sleeve-shaped inserts projecting into the path of movement of the piston and being axially displacea... | 01/15/1991 |
| 4970943 | Power steering cylinder with built in continuously variable steering angle limiter A steering angle limiter is built into an auxiliary power steering mechanism wherein the limits of steering can be variably preset to any predetermined degree within limits in a continuous manner. The limiter is a device built into the power cylinder. Suc... | 11/20/1990 |
| 4915012 | Control scheme for apparatus with moveable rail section A conveyorized transport apparatus has an overhead rail system for transporting articles on a suspended trolley from one location to another. A moveable rail section in the system has a pivotal connection with an adjacent rail section to pivot the moveabl... | 04/10/1990 |
| 4883412 | Variable capacity diaphragm pumps The invention relates to an improvement in variable capacity diaphragm pumps. According to the invention, the piston is driven by a cam fast with the wheel of a speed reducing gear pair, the eccentric/wheel assembly rotating idly on a fixzed shaft of whic... | 11/28/1989 |
