Class 254/102 - Telescoping screws

Subclass of Class 254 - Implements or apparatus for applying pushing or pulling force
Definition: Screw pushing and pulling implement which comprise a plurality
No. of patents: 37
Last issue date: 03/18/2008

Number	Title	Issue Date
7344117	Adjustable lift support apparatus An adjustable lift support apparatus includes a base, a sleeve attached onto the base, at least one meshing device, a shaft, and a support attached at the shaft. At least one groove is formed on an inner surface of the sleeve along a first axial direction. Each mesh...	03/18/2008
7334305	Bearing and seal installation device and method An installation device and method for installing engine components, such as bearings and seals, on an engine. The device including a first connection member that couples to an engine and a second moveable member configured to translate relative to the first connecti...	02/26/2008
7299589	Telescoping boom actuation mechanism formed of concentrically nested tubular boom sections mutually engaged by roller assemblies riding on helical tracks A telescoping boom mechanism for deploying an expandable structure, such a hoop-supported antenna, comprises a plurality of concentrically nestable tubular boom sections, that are mutually engageable with one another by way of roller assemblies and helical tracks fo...	11/27/2007
7284738	Adjustable lumber stand system An adjustable lumber stand system may include a pair of adjustable leg assemblies. Each leg assembly may comprise a first external tubular section into which a second internal section may longitudinally slidably adjust. A pair of base anchors configured to anchor th...	10/23/2007
7273200	Safety equipment for building sites The invention relates to a construction safety assembly. The inventive assembly comprises: safety posts with non-skid ends, which are provided with means for the rapid connection of a barrier; and, optionally, an upper jack-type safety element having a lower horizon...	09/25/2007
7168355	Fiber chopper and method of chopping A method and apparatus for chopping long unwound items like fiber, fiber strands, yarn, etc. The chopper has a backup roll, a blade roll and a biasing system for forcing the backup roll and the blade roll together at a desired force during set up and operation. The ...	01/30/2007
6685169	Motor operated jack for vehicles A motor-operated jack for vehicles includes a lifting unit, which includes a spiral lifting ram having an internal thread limitedly formed at a lower portion of the spiral lifting ram, and a pin held in a horizontal groove formed at the top end of a prima...	02/03/2004
6659428	Jack for automobile A hollow housing of a screw-type jack is integrally formed by a press. A ram is mounted in the center portion inside this housing in an axial direction to be extendable/contractible in a vertical direction. A drive mechanism mounted in the housing, for ex...	12/09/2003
6581912	Jack assembly for supporting a shelter structure A jack assembly for supporting a shelter structure includes a first tubular member fixed at a first end thereof to a plate, a nut disposed in the first tubular member and fixed to the plate, the plate defining a central hole aligned with a central hole in...	06/24/2003
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
6367777	Electric version fry dispenser The present invention provides an electric version of a dispenser unit and method of monitoring a request signal for filling empty baskets, movement of the empty baskets on a loading ramp via a stop gate, and movement of the filled basket between a loadin...	04/09/2002
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
5855360	Modular panel lifter and adapter An electrical adapter fitting for use on modular furniture panels of a kind electricaly prewired with a raceway along a lower edge of the panel. The adapter being L-shaped in cross-section with upstanding fingers adapted to straddle an electrical raceway ...	01/05/1999
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
5722304	Linear actuator A linear actuator comprising a hollow first cylindrical shaft with helical threads on its exterior surface and helical threads of opposite pitch on its interior surface and a second cylindrical shaft having an exterior surface with helical threads of the ...	03/03/1998
5664762	Automotive screw jack A screw jack (20) includes a stand (21) which houses a side gear (58) which, when rotated, turns a bottom gear assembly (67). An inner screw (73) is connected to the bottom gear assembly (67) and thus turns therewith. Because of an interaction with an out...	09/09/1997
5588264	Method and apparatus for supporting a building surface The present invention is a device for supporting, leveling and attaching (where appropriate), an elevated building surface. The device can be raised or lowered by rotating a base member of the device. The device includes a flange member for the support of...	12/31/1996
5511914	Propellant grain machining device and method An apparatus for cutting a path of propellant grain away from a solid rocket motor. The apparatus includes a telescoping arm connected to a rotatable body. A cutting tool having a primary and secondary cutter is connected to a distal end of the telescopin...	04/30/1996
5201084	Screw driven lift mechanism for a hospital patient chair transfer system An improved transfer system for patients is incorporated either with a tub enclosure or a mobile frame and includes telescoping tubes for lifting a patient chair and thus elevating the patient and lowering the patient into the tube enclousre. The lift sys...	04/13/1993
5172442	Litter support having telescoping threaded rod arrangement A hospital bed includes a base supported by casters, and a lift arrangement vertically movably supports a patient support section on the base. The lift arrangement includes a threaded first member secured to and projecting downwardly from the patient supp...	12/22/1992
5123629	Screw-type jack A screw-type jack including an auxiliary screw barrel which is engaged with a ram cap at the uppermost stage. With that construction, this screw-type jack also has such function as to overlay an upper portion of a casing by the auxiliary screw barrel when...	06/23/1992
5118082	Electrically operated screw-type jack An electrically operated screw-type jack comprising a support base, a housing, a jack body, a lifting ram being contained in the jack body, a servo motor being contained in the housing, reduction gears for transmitting the driving power of the servo motor...	06/02/1992
5110089	Extendible jack stand An extendible jacking apparatus including first, second and third normally vertical frames arranged in telescoping relationship, and containing a locking mechanism for automatically locking the first and second frames together while the third frame is bei...	05/05/1992
5092539	Jam resistant ball screw actuator An actuator (10) is disclosed for movement between a retracted position and an extended position. The actuator (10) can be used to pivot a pylon (14) in a tilt rotor aircraft relative to the aircraft wing (12) between a helicopter mode and an aircraft mod...	03/03/1992
5067739	Structure of motorcycle stand For supporting a motorcycle in place, a motorcycle stand comprising a substantially H-shaped tubular frame defining therein two cylindrical side chambers vertically disposed at two opposite side with a cylindrical cross chamber transversely disposed there...	11/26/1991
4949585	Telescopic screw jack for the adjustment of an element such as a vehicle seat The jack comprises a tubular primary screw (10) provided with an outer screw thread and an inner screw thread having opposite thread hands, a secondary screw (11) cooperative with the inner screw thread and having an end (11a) articulated to a fixed point...	08/21/1990
4914940	Exhaust manifold expander and method of using said expander A manifold spreader which includes a main body portion having at its first end portion a recess in which is rotatably disposed a first end of an arm member. The arm member has a manifold engaging member on a second end thereof. A plurality of bearings mou...	04/10/1990
4905387	Adjustable wheel for snow plow A snow plow having a curved blade with a bottom scraping edge and rearwardly extending horizontally positioned mounting means. Two wheels each having a hub are each attached to a frame member with an outer cylindrical member having the bottom thereof conn...	03/06/1990
4887838	Wheeled carrier for a snow plow A wheeled carrier apparatus for attaching and removing a demountable snow plow from a motor vehicle comprising a planar assembly of slender members which is adjustable forwarding to an open operative configuration and rearwardly to a closed shipping and s...	12/19/1989
4872903	Screw jack safe against overload for a movable element such as a seat structure The jack (V) comprises a tubular primary screw (10) movable in rotation and translation and provided with an outer screw thread (10a) and an inner screw thread (10b) which have opposite thread hands, a fixed secondary screw (11) engaged in the inner screw...	10/10/1989
4850743	Template levelling device An operator for levelling a drilling or production template on the sea bed is formed from a rotatable hydraulic cylinder, a piston within the cylinder to which hydraulic pressure can be applied, and a drive shaft from the piston to a screw jack. Hydraulic...	07/25/1989
4779878	Trolley base with height adjuster A trolley base has upright sides, made from frame members and base support members supported on wheels. The upper parts of the sides are slidable in the frame members to give height adjustment. A lifting device comprising an extensible strut, such as a pr...	10/25/1988
4732365	Bench mounted spring compressor A bench mounted spring compressor is utilized to compress a helical coil spring of a MacPherson strut suspension assembly. The compressor includes a fixed base member having an adapter attaching the shock absorber thereto. A vertically movable tube is arr...	03/22/1988
4684291	Template levelling device A screw jack for levelling a subsea template comprises (a) a guided entry adapted to receive a flat-sided drive shaft, (b) an inner screw adapted to be rotated by the drive shaft, (c) a non-rotatable inner housing, through one end of which the screw is threaded, (d...	08/04/1987
4609179	Screw jack A screw jack which comprises a motor mounted in a housing which also houses a vertically mounted lifting screw assembly, a transmission unit for transmitting the output motion of the motor to the lifting screw assembly, and a limit switch means which is a...	09/02/1986
4127343	Inner tube for screw jack A screw tube assembly is disclosed for use in a screw jack or the like. The screw tube assembly comprises a hollow tube member in one end of which is formed a recess so as to reduce the tube member wall thickness. Into this recess an annular bushing is in...	11/28/1978

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Class 254/102 - Telescoping screws