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 |
| 7870803 | Ball screw and method for displacing a threaded spindle in a ball screw A ball screw comprising a threaded nut with thread channels for rolling bodies, a threaded spindle with thread channels for rolling bodies, and an intermediate bush, which is arranged between the threaded nut and the threaded spindle, wherein the intermediate bush h... | 01/18/2011 |
| 7424833 | Telescopically moving structure A telescopically moving structure (1) comprising a nut (2) mounted in a rotationally fixed manner in relation to a frame part, a spindle tube (3) with an external thread in engagement with the nut (2), which spindle tube (3) furthe... | 09/16/2008 |
| 7367746 | Lifting pole apparatus for traffic control There is provided a lifting pole apparatus which can lift and lower a pole having such strength as to be capable of preventing cars from entering. The lifting pole apparatus comprises a cylindrical pole which is capable of lifting and lowering inside a housing case;... | 05/06/2008 |
| 7334671 | Actuating device for a clutch An actuating device (18) or a clutch (16) of a motor vehicle (2) comprising one electric motor (34), one gearing (36, 40, 42, 44) which converts rotational motion of the electric motor (34) into a translatory motion and one ... | 02/26/2008 |
| 7320198 | Integrated gas spring actuator strut assembly with threaded nut in gas spring An integrated gas strut actuator assembly particularly adapted for providing power actuation of a motor vehicle lift gate or other opening closure. The assembly integrates the function of a counterbalancing gas spring and that of a electrically powered actuator. The... | 01/22/2008 |
| 7296380 | Device for operating a door leaf or the like and door structure provided with such a device A device for opening and closing a pivotally mounted door leaf including an actuator, which is displaceably and/or rotatingly arranged in a housing and connected to the door leaf and which, during displacement/rotation, actuates the door leaf, and a drive motor whic... | 11/20/2007 |
| 7244075 | Telescoping bollard with screw drive The present invention includes a bollard assembly 1 containing an an elongated housing 4. A bollard 2 is spaced radially inward of the housing 4 and is axially displaceable therein. A threaded drive shaft receiver 32 is centrally f... | 07/17/2007 |
| 7225694 | Telescopic actuator A telescopic actuator has a lead screw and one or more concentric or tiered screws. Each screw has one or more tangential interference stop features such as stop cogs. As the lead screw is rotated, it translates out of the concentric screws. As the lead screw reache... | 06/05/2007 |
| 7195384 | Adjusting device for head light system An adjusting device for head light assembly includes a motor fixed to a frame and the output shaft of the motor extends through a guiding passage in the frame and connected to a driving rod which includes outer threaded periphery. An activation rod has a spherical h... | 03/27/2007 |
| 7185868 | Telescopic display stand A telescopic display stand includes a base and a fixed tube secured on the base. A first telescopic tube and a second telescopic tube are in turn telescopically received in the fixed tube. A gear box is mounted in the first telescopic tube, and a plug is mounted in ... | 03/06/2007 |
| 7098419 | Driving device and clamping tool equipped with same The invention concerns a device comprising a screw (10) with pitch (P1) driven by a motor (M), a nut (12) co-operating with the screw (10) and designed to be driven in translation in the direction of the screw axis, said nut being integra... | 08/29/2006 |
| 7073406 | Screw and nut transmission and cable attached to the screw A cable or another longilinear transmission component is set into the center of an axial cavity of a screw belonging to a screw and nut movement conversion unit. By means of this arrangement, bending moments exerted on the screw between the point of attachment of th... | 07/11/2006 |
| 7066041 | Linear actuator A linear actuator useful for adjusting furniture includes a housing (1) with a reversible electric-motor (2) which, via a transmission (11, 13), drives a spindle (4) with a force absorbing bearing (16). On the spindle there is a nu... | 06/27/2006 |
| 7062987 | Ball bearing and a continuously variable speed transmission of belt type A ball screw in a continuously variable speed transmission has an axially immovable pulley half (2) and axially movable pulley half (3) both mounted on a rotary shaft (4). The axially movable pulley half (3) is moved by a ball screw (2... | 06/20/2006 |
| 7044012 | Actuating device with intermediate rolling elements Actuating device comprising a longitudinal shaft (2), an intermediate tailstock spindle (3), an outside sleeve (4), internal thread means (5) making it possible to connect the longitudinal shaft and the intermediate tailstock spindle to g... | 05/16/2006 |
| 7000495 | Actuator device with intermediate rollers Actuator device comprising a support (2); a longitudinal drive rod (8), part of the rear end (9) of which is mounted and rotates inside the support, and of which a front end section (17) has an external screw thread (18) and on its... | 02/21/2006 |
| 6948707 | Stabilizer bar having variable torsional stiffness A stabilizer bar (D) for controlling the roll of an automotive vehicle has left and right sections (16, 18) joined together at a coupling (20) including a housing (36) on one of the sections and on a rotor (38) on the other section, with ... | 09/27/2005 |
| 6928895 | Ballscrew locking nut A ballnut assembly is provided in which a locknut (20), which is normally unloaded becomes loaded in the event of failure of a primary load path. This loading causes relative motion between locking nut (24) and the threads of a shaft (8) such th... | 08/16/2005 |
| 6925844 | Lock having a helical keyway and accompanying key and methods therefor The present application advantageously provides at least one keyway in a lock core that poses tremendous difficulty for a lock breaker by not allowing the lock breaker to see all of the pin tumblers in the keyway. The keyway according to a preferred embodiment of th... | 08/09/2005 |
| 6911819 | Rotary to linear LVDT system A rotary input for a linear variable differential transformer (LVDT) system connects to a gear reduction system. The gear reduction produces a reduced rotary output in a rotary output member. The output member is threaded, and a nut is threaded onto the output membe... | 06/28/2005 |
| 6880416 | Device for adjusting parts which can move in relation to each other A device for adjusting parts which can move in relation to each other includes: a driveable threaded hollow spindle with inner and outer threads increasing in opposing directions; an inner spindle cooperating with the inner threads and connected to a first fixing de... | 04/19/2005 |
| 6772653 | Linear actuator The linear actuator has a motor housing (1) of tubular stainless steel with an end cap (2), a motor (4) and epicyclic gearbox (6). The actuator has a telescopic arm (11), having an outer tube (12) and an inner tube (13 | 08/10/2004 |
| 6691587 | Actuator Actuators for subsea downhole chokes have tended to include hydraulic pistons which are prone to failure and crude in accuracy. The invention provides an actuator (1) having first and second rotary motors (2, 16) and an output region (3) arranged to engag... | 02/17/2004 |
| 6494033 | Sequentially operated actuator with brake arrangement An actuator comprising, a first, rotatable member arranged to be driven by a motor, a sleeve, said first member cooperating with said sleeve such that rotation of the first member at a given speed relative to said sleeve causes the sleeve to be translated... | 12/17/2002 |
| 6435048 | Multi-leg telescopic linear actuator A compact telescopic leg assembly includes a generally cylindrical drive motor mounted axially within the inner leg and coupled to a drive collar by a pedestal mount. A drive screw is threadably coupled to a first drive collar which is attached to the inn... | 08/20/2002 |
| 6382039 | Telescopic system for a robot A telescopic system for a robot includes a frame for mounting a motor, a stationary module mounted on the frame and a rotational shaft rotating by the motor. The rotational shaft is mounted in the stationary module, and a movable plate is associated with ... | 05/07/2002 |
| 6167694 | Actuator An actuator comprising a drive arrangement arranged to rotate a first drive member, the first member being in screw-threaded engagement with a second member, the second member being in screw-threaded engagement with a third, output member, wherein the scr... | 01/02/2001 |
| 6161444 | Precision linear adjustment mechanism A compact adjustment mechanism that provides precision linear travel. The drive mechanism has a knob with a paddle at an inner end that is used to transfer torque. A drive screw has a plurality of grooves disposed around an outer diameter, a plurality of ... | 12/19/2000 |
| 6067868 | Anti-rotation mechanism in a screw type linear actuator An anti-rotation mechanism in a linear actuator has outer and inner cylinders, affords high accuracy and rigidity, is simple in structure, not requiring the use of a tie rod, and is inexpensive to manufacture. The outer cylinder 3 has both end portions 3 ... | 05/30/2000 |
| 6026970 | Telescoping tube assembly A telescoping tube assembly includes a first longitudinal tube section and a second longitudinal tube section disposed within the first longitudinal tube section and adapted for telescoping motion into and out of the first longitudinal tube section. A thi... | 02/22/2000 |
| 5943910 | Telescopic ball nut and screw linear actuator and method of constucting and using it A telescopic multiple ball screw nut linear actuator has an outer screw and first nut defining a first helical ball raceway between them. The screw has a tubular portion with an axially open outer end on which a second nut is fixed. An inner screw, provid... | 08/31/1999 |
| 5937699 | Telescopic system having a rotation transmission link between a screw and nut of a module A telescopic system including a plurality of modules. Each of the modules includes a case, a nut, and a screw. The nut is freely rotatable in the case and is prevented from translating with respect to the case. The screw is engaged with the nut, and each ... | 08/17/1999 |
| 5937459 | Pillow lifting device, particularly for beds and the like A pillow lifting device particularly for beds and the like, including: a first fixed structure, which can be arranged at the region where the user's head is meant to rest; a second structure, which is pivoted to the first fixed structure at one end and is... | 08/17/1999 |
| 5848554 | Multistage spindle drive for converting rotary motion into linear motion A multistep spindle drive is provided for converting a rotary movement into a linear movement with different speeds of withdrawal and extension. The spindle drive includes at least two threaded spindles, which telescopically mesh with each other and are i... | 12/15/1998 |
| 5733096 | Multi-stage telescoping structure A multi-stage telescoping tube structure and a robot including a multi-stage telescoping tube structure. The multi-stage telescoping tube structure includes an outer tube, an intermediate tube, and an inner tube. The intermediate tube is slidably received... | 03/31/1998 |
| 5673591 | Electric cylinder An electric cylinder to reduce shock and damage to itself and a body to be transferred. The electric cylinder includes a rod head having a flange mounted on the distal end of a hollow piston rod, a circular polyurethane rubber plate mounted on a circular ... | 10/07/1997 |
| 5427337 | Dual drive mechanism and related methods A dual drive mechanism for medical/dental chair comprising a single motor drive and a pair of linearly driven shafts. In one embodiment, the dual drive mechanism provides a self-locking, reliable and easily maintainable system for vertically displacing on... | 06/27/1995 |
| 5358265 | Motorcycle lift stand and actuator Disclosed is an improved automatically actuated motorcycle lift stand. The stand comprises upper and lower stand units on each side of the motorcycle. This configuration enables independent raising of the motorcycle when resting on either side, as well as... | 10/25/1994 |
| 5313852 | Differential linear actuator A differential linear actuator is disclosed which minimizes the torque that must be reacted by an input, rotary drive sleeve member. The differential linear actuator includes an actuator housing within which the drive sleeve is rotatably mounted. An inter... | 05/24/1994 |
| 5249474 | Power takeoff and electromechanical shifter therefor A power takeoff (PTO) assembly equipped with an electromechanical shifter for moving a pinion gear of the PTO assembly into and out of engagement with a drive gear of that assembly or of a vehicle transmission on which the assembly is mounted. The PTO ass... | 10/05/1993 |
