Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 7921744 | Rolling screw Rolling screw (1) comprising a first threaded male member (6), a second threaded member (3), means (5) that permit said second threaded member (3) to rotate freely in relation to the housing (2), as well as means (7) ... | 04/12/2011 |
| 7412910 | Mechanism for transforming a rotational movement into a linear movement A mechanism for transforming a rotational movement into a linear movement, comprising a non-deformable nut, that is prevented from rotating but not from axially moving, a radially deformable tubular screw, having freedom of rotation but not of axial movement and hav... | 08/19/2008 |
| 7370684 | Door shutter mechanism A stacking mechanism for shutter members of a shutter mechanism, comprising: a rotatable screw with external thread of length L and pitch P1; a plurality of N traveling nuts mounted on the screw, having internal thread of pitch P1 and external thread o... | 05/13/2008 |
| 7337690 | Leadscrew assembly with a wire-wound leadscrew and a spring-pin engagement of a drive nut to the leadscrew A leadscrew assembly includes a leadscrew having an elongated shaft with an outer lateral surface and a rotational axis, and a leadscrew thread formed of a thread wire helically wrapped in spaced-apart turns upon the lateral surface and affixed to the elongated shaf... | 03/04/2008 |
| 7291089 | Toroidal transmission A method is provided for optimally engineering a toroidal transmission having a desired input/output ratio to implement the desired ratio of the transmission while meeting the torque and efficiency requirements of the design. Nanoparticle technology is used to manuf... | 11/06/2007 |
| 7249534 | Leadscrew mechanical drive with differential leadscrew follower structure A leadscrew mechanical drive includes a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch, and a leadscrew follower structure engaged to the leadscrew. The leadscrew follower structure includes a threaded insert having an... | 07/31/2007 |
| 7219570 | Long-span lead screw assembly with anti-backlash nut A lead screw assembly having a lead screw rotatable within a hollow tubular portion of a reinforcing rail. A nut engages with threads of the lead screw and is movable along the reinforcing rail. The lead screw includes plurality of first threaded portions having an ... | 05/22/2007 |
| 7143661 | Leadscrew mechanical drive with differential leadscrew follower structure and brake A leadscrew mechanical drive includes a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch. A leadscrew follower structure is engaged to the leadscrew. The leadscrew follower structure includes a first leadscrew follower a... | 12/05/2006 |
| 7127791 | Split nut for use with a rod having dual directional screw threads about a common diameter A docking apparatus for printed circuit boards including a cassette housing defining a housing cavity for containing a printed circuit board (PCB) and a linkage mechanism associated with the cassette housing. The linkage mechanism includes a linkage arm pivotally co... | 10/31/2006 |
| 7066045 | Assembly comprising a spindle and a moving nut An assembly comprises a spindle and a moving nut disposed on the spindle. The spindle and the moving nut are made of plastics. At least one of the two components spindle and moving nut being resilient such that the moving nut is prevented from getting stuck on the s... | 06/27/2006 |
| 7025705 | Toroidal transmission A method is provided for optimally engineering a toroidal transmission having a desired input/output ratio to implement the desired ratio of the transmission while meeting the torque and efficiency requirements of the design. Nanoparticle technology is used to manuf... | 04/11/2006 |
| 6955468 | Linear-motion device and ball screw A linear-motion device has: a linear-motion element fitted on a shaft which moves straight along the shaft; a plurality of balls which are retained in a ball groove formed on the inner side of the linear-motion element and roll over between the ball groove and the s... | 10/18/2005 |
| 6931960 | Leadscrew mechanical drive with differential leadscrew follower structure A leadscrew mechanical drive includes a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch. A leadscrew follower structure preferably having two leadscrew followers is engaged to the leadscrew. Each leadscrew follower incl... | 08/23/2005 |
| 6925901 | Device for converting rotational movement into axial movement A device for converting rotational movement into axial movement includes planetary rollers driven by a drive shaft projecting from a drive device and maintained peripherally at a same distance, in addition to a push body axially displaced by the planetary rollers. T... | 08/09/2005 |
| 6823756 | Displacement unit A displacement unit for at least one element to be displaced is provided comprising a drive unit, a transfer element that is caused to move by the drive unit and that comprises a thread or a tooth set, and an engagement element, which engages into the thread or toot... | 11/30/2004 |
| 6415673 | Reinforced lead screw with anti-backlash nut An anti-backlash nut is assembled on a reinforced lead screw for bilateral motion lengthwise of the lead screw as the screw is rotated. A hollow, elongate reinforcing rail extends lengthwise of and surrounds the lead screw. A slot in the rail extends leng... | 07/09/2002 |
| 6053065 | Spindle drive A spindle drive with a spindle and a spindle nut which moves on the spindle and is used for high precision drive of a linearly movable device is provided. The spindle nut comprises a base block connected to the movable device and having a bore extending a... | 04/25/2000 |
| 5976062 | Inclimetric resistance sliding sleeve exercise device The invention is an exercise device which creates a controlled and infinitely variable resistance profile using a pair of rods that are wrapped about a common axis with a varying pitch. A slide unit is attached to the rods with rollers. When the slide uni... | 11/02/1999 |
| 5970812 | Quickly movable elastically engaging screw-and-nut mechanism A screw-and-nut mechanism comprises a supporting seat, one or more semi-nuts and the actuating member thereof, characterized in that the engagement of internal thread on the semi-nut with external threa on the screw is started elastically, then completed ... | 10/26/1999 |
| 5956997 | Worm gear with a gear ring nut A worm gear for transforming a rotary motion into a reciprocating motion comprises a threaded spindle (2) which is mounted for rotation on at least one needle roller bearing (5) in a gear ring nut (22) which functions as a housing (21). A profiled gear ri... | 09/28/1999 |
| 5918506 | Transfer device The invention relates to a transfer device for generating a regular, linear transfer movement especially for reading an image plate used in X-raying. The transfer device comprises a fixed housing, a rotatable threaded bar (5), a slide (6) moving linearly ... | 07/06/1999 |
| 5876096 | Power seat driving apparatus for a vehicle A driving apparatus which is capable of adjusting the forward and backward position and the height of a seat section by using a single motor to reduce the weight of the apparatus and simplify the structure. Nut members are mounted on operating threaded sh... | 03/02/1999 |
| 5863273 | Toroidal transmission and method and apparatus for making and assembling same A toroidal transmission includes a stator having a plurality of helical races that together define a toroidal cavity having an axis, and first and second shafts rotatable about the axis, the first shaft carrying a worm, the second shaft carrying a plurali... | 01/26/1999 |
| 5863142 | Applicator device with self-tapping piston The invention relates to an applicator device for applying, e.g., a viscous fluid or a gel, with the use of a self-tapping piston. The device comprises a piston provided with a blade, the cutting edge of which is inclined in relation to the longitudinal a... | 01/26/1999 |
| 5857383 | Heavy duty roller nut assembly for power drive applications A linear displacement device (1) is provided with a lead screw (24) having a helical threaded portion (74) and a roller nut assembly (10). The roller nut assembly (10) includes a housing (50) having openings (52, 54) for receiving the lead screw (24) ther... | 01/12/1999 |
| 5852949 | Segmented screw traversing mechanism The linear traversing apparatus includes a lead screw formed from a plurality of lead screw segments which are supported at regular intervals, that is, at the intersection of adjacent lead screw segments, along a span by fixed hollow cylindrical splice po... | 12/29/1998 |
| 5784923 | Toroidal drive system and method of assembling same A toroidal drive system includes a housing composed of first and second mating housing sections having interior walls which cooperate to define a plurality of parallel, helix-like races inscribed in a torus having a circular axis. The two mating housing s... | 07/28/1998 |
| 5651396 | Variable pitch lead transmission mechanism for weft gripper strap drive A variable pitch lead transmission mechanism includes a slider, a screw rod having a screw thread and two opposite screw thread surfaces and mounted on the slider, a driver contacting with one of the screw thread surfaces and adapted to be translated by a... | 07/29/1997 |
| 5533417 | Leadscrew assembly A leadscrew assembly (10, 52, 82) having an externally threaded leadscrew (12) and first and second ball bearings (16, 18) disposed such that a segment of the inner races (24, 26) thereof makes contact with diametrically opposing portions of the leadscrew... | 07/09/1996 |
| 5462337 | Power seat driving apparatus for a vehicle A driving apparatus which is capable of adjusting the forward and backward position and the height of a seat section by using a single motor to reduce the weight of the apparatus and simplify the structure. Nut members are mounted on operating threaded sh... | 10/31/1995 |
| 5212417 | Stepping motor for driving head carriage and disc drive unit comprising such motor A stepping motor for driving a head carriage having a motor axis on which is provided a lead screw comprises a seat plate that forms a back end of the motor, said seat plate being provided with a projection that projects toward a radial direction of the m... | 05/18/1993 |
| 5070985 | Coupling for a linear displacement transducer A device for coupling a rotary member to an axially movable input stem of a linear displacement transducer comprises an axially movable element which is coupled to the stem and threadedly engages the rotary member. The axially movable element is restraine... | 12/10/1991 |
| 5012687 | Ball screw A ball screw composed of a screw shaft constantly supported on struts at plural parts and a nut movable over an entire length of the shaft by rotations thereof. The nut moves with a high accuracy, and the durability is improved with a simple structure by ... | 05/07/1991 |
| 4984477 | Driving device A driving device for producing substantially linear movement of a driver comprises a shaftless spiral rotatable around its longitudinal axis. The spiral encloses at least one sliding body which is provided with at least one element projecting from the sli... | 01/15/1991 |
| 4945781 | Ball screw mechanism The invention relates to a ball screw mechanism (10) having a nut (20) screwing along a worm spindle (12) with at least one set of balls (18) lodged therebetween. The nut is preferably an elongate cuboid block and has gripping jaws (26, 28) for retaining ... | 08/07/1990 |
| 4922768 | Driving device A driving device comprising a shaftless spiral rotatable around its longitudinal axis and enclosed by a limiting structure. The limiting structure has a first end region and a second end region corresponding to each end of the spiral. The shaftless spiral... | 05/08/1990 |
| 4878390 | Linear positioning apparatus To support a long spindle with a spindle nut thereon, a plurality of support elements are located in a housing (1), the support elements (26, 226) including spring-biassed sliders which, when positioned at predetermined stop recesses (48) in the inside of... | 11/07/1989 |
| 4794810 | Linear actuator A linear actuator has a screw threaded shaft member and an internally screw threaded member, the threadform of the shaft member corresponding to that of the internally screw threaded member but of smaller diameter, whereby the member may be skewed relativ... | 01/03/1989 |
| 4753427 | Clamp with fast-acting, one-hand adjustment The clamp includes a member having an anvil at one end and a threaded bore at another end with a longitudinal bore axis directed at the anvil. A rod having threads and longitudinal splines is threadingly disposed within the threaded bore. The rod has a fi... | 06/28/1988 |
| 4624288 | Mechanism to control the movements of weft insertion members in shuttleless weaving looms In a mechanism to control the movements of the weft carrying grippers in shuttleless weaving looms--of the type wherein a gearwheel controlling the grippers carrying strap is caused to rotate forward and backward by a variable pitch cam screw, passing lon... | 11/25/1986 |
