Abstract: A supporting device for supporting a display is provided. The supporting device includes an upright, a bearing slider, an actuating module, a driving module, and a control module. The upright includes a column body and a receiving space. The bearing slider is slidably disposed in the receiving space. The actuating module includes a screw rod and a screwing element, the screw rod is pivoted to the upright along a first axis and inserted to the screwing element, and the screwing element is disposed on the bearing slider and screws with the screw rod. The driving module is connected to the actuating module and drives the screw rod to rotate about the first axis. The control module controls the driving module to drive the screw rod to rotate to make the screwing element and the bearing slider move between a highest position and a lowest position along the first axis.

Abstract: A trailer jack support apparatus configured to support trailer hitches includes a monolithic block having six sides with the trailer jack support being in the shape of a square frustrum or trapezoid. The top of the trailer jack support includes a number of protrusions which extend from the trailer jack support. Further, the top side has a recess and a void located at the bottom of the recess. In addition, the bottom of the trailer jack support includes numerous recesses defined therein and may engage with the protrusions extending from the top of a second trailer jack support.

Abstract: A landing gear system and method of actuating the landing gear system, the system including a first leg assembly, a second leg assembly, a cross-shaft arranged between the two leg assemblies, and a landing gear actuator. The landing gear actuator includes a motor and a coupling shaft which is arranged to couple and decouple the landing gear actuator from the cross-shaft.

Abstract: A jack assembly for a towed vehicle is provided. The jack assembly includes an outer tube, an inner tube supported for telescopic movement within the outer tube, a jack screw operatively engaging a jack nut within the inner tube, and a mounting assembly attached to the outer tube for attaching the jack assembly to the towed vehicle. A cover may be positioned over a portion of the outer tube attached to the mounting assembly and supported by the mounting assembly. An L-shaped release pin is utilized and accommodated by the cover. The mounting assembly may be adjustable in height along the outer tube. A reservoir may be provided to facilitate protection of the jack screw by ensuring its lubrication, and a foot having a convex bottom surface may be utilized.

Abstract: Aspects herein relate to using a three or more points to control the angular orientation of a structure via three or more jacks, and then stabilizing the structure via one or more stabilizers. In some aspects, the foregoing structure may include, for example, a motor home, recreational vehicle, travel trailer or fifth wheel trailer.

Abstract: An apparatus for lifting and moving a pallet rack includes a lifting portion and a supporting portion. The lifting portion and the supporting portion are in telescoping relation to each other and joined by a threaded rod. A swiveling caster is connected to the supporting portion, and a drive shaft is coupled to the threaded rod, with the drive shaft preferably extending out of the lifting portion. A vertical base plate is removably coupled to the lifting portion and includes at least one primary attachment point for attaching a bracket. The bracket is removably affixed to at least one primary attachment point, and preferably includes several secondary attachment points arranged to align with mounting points on the pallet rack so the pallet rack can be lifted by rotating the drive shaft.

Abstract: A low-profile trailer jack for preventing damage to a jack includes a jack module that comprises a plurality of nested sections so that the jack module is selectively extensible. A first coupler is coupled to the jack module. A second coupler is coupled to an upper face of a hitch assembly proximate to an orifice that is positioned through the hitch assembly. The second coupler is complementary to the first coupler. The jack module is configured to be inserted into the orifice, positioning the second coupler to couple to the first coupler to fixedly position the jack module within the orifice. A top of the jack module is positioned proximate to the second coupler. An actuator is operationally coupled to the jack module. The actuator is positioned to extend the nested sections so that a bottom of the jack module contacts a surface to elevate the hitch assembly.

Abstract: A jack assembly for a towed vehicle is provided. The jack assembly includes an outer tube, an inner tube supported for telescopic movement within the outer tube, a jackscrew operatively engaging a jack nut within the inner tube, and a mounting assembly attached to the outer tube for attaching the jack assembly to the towed vehicle. A cover may be positioned over a portion of the outer tube attached to the mounting assembly and supported by the mounting assembly. An L-shaped release pin is utilized and accommodated by the cover. The mounting assembly may be adjustable in height along the outer tube. A reservoir may be provided to facilitate protection of the jackscrew by ensuring its lubrication, and a foot having a convex bottom surface may be utilized.

Abstract: The present invention is directed broadly to a marine vessel (10) comprising a deck (12) mounted to a hull (14) together with a sail (16) coupled to the marine vessel (10) via a mast base assembly (18). The mast base assembly (18) comprises a mast tilt assembly (22). The mast base assembly (18) also comprises a mast base mounting (20) to which the mast tilt assembly (22) is pivotally mounted for movement about a tilt axis (24) between stowed and operative positions. The mast base assembly (18) further comprises a sail slew assembly (26) mounted to the sail (16) associated with the marine vessel (10). The sail slew assembly (26) is operatively coupled to the mast tilt assembly (22) for slewing of the sail (16). The sail (16) is rotated or slewed about a slew axis (28) of the mast tilt assembly (22) to reorient the sail (16) relative to the marine vessel (10).

Abstract: According to some embodiments, a vehicle restoration system comprises a first base unit, a second base unit, a third base unit, and at least a fourth base unit, an adjustment member positioned at each base unit, the adjustment member being configured to support a surface of a vehicle along an upper end of the adjustment member, the jack being configured to selectively change a vertical position of the upper end of the adjustment member, a first side member coupling the first base unit to the second base unit, a second side member coupling the third base unit to the fourth base unit, a first strut coupling the first base unit to the third base unit, and a second strut coupling the second base unit to the fourth base unit.

Abstract: Aspects herein relate to using a three points to control the angular orientation of a structure via three or more jacks, and then stabilizing the structure via one or more stabilizers. In some aspects, the foregoing structure may include, for example, a motor home, recreational vehicle, travel trailer or fifth wheel trailer.

Abstract: A trailer tongue jack is convertible between operation by an integral actuator and an external actuator. The jack includes a clutch mechanism or coupler operable to selectively engage a drive screw with the integral actuator or the external actuator.

Abstract: A system for supporting a vehicle. The system may include a vehicle jack in mechanical communication with a jack foot and a striker plate. The jack foot is rotatable relative to the vehicle jack on a rotation axis disposed on the vehicle jack and perpendicular to a long axis of the vehicle jack. The jack foot includes a base at a distal end of the jack foot. The jack foot also includes a cam surface at least in part at a proximal end of the jack foot. The cam surface is aligned with the striker plate and interacts with the striker plate to rotate the jack foot in response to movement of the vehicle jack from a lowered position to a raised position.

Abstract: In an example, an adaptor for a lift jack may include a first section having an opening to receive a ring attached to a vehicle and a second section connected to the first section, in which the second section includes a space to receive a runner support of a lift jack runner. The adaptor may also include a locking hook rotatably connected to the second section, in which the locking hook is to latch onto the ring when the runner support is inserted into the space in the second section.

Abstract: A cooling system for a bus may include a heat dissipating plate mounted on a roof panel of a top of a bus and cooling heated fluid with wind, and an actuator connected to an air tank, selectively actuating the heat dissipating plate and adjusting an inclination angle between the heat dissipating plate and the roof panel.

Abstract: A new log support and clamp system (log rest) for a portable sawmill, having a log rest and a log dog. The log rest features a rack and pinion for adjusting a vertical position of the log rest using an actuation mechanism located on the operator's side of the portable sawmill, which improves the ability of the user to affix the log in place for sawing. Also, a portable sawmill having such a log rest.

Abstract: The invention relates to a fixing element for locking a hinged hand crank on the input shaft of a support winch for semi-trailers, wherein the hand crank is fastened to the input shaft in an articulated manner and can pivot between at least one folded-in rest position and at least one folded-out usage position. According to the invention, said fixing element has a fastening section for fastening to the hand crank and a spring bar connected to the fastening section on which at least one locking section is formed, wherein the locking section reaches over the end face of the input shaft in a form-fitting manner in a folded-out usage position of the hand crank and is simultaneously pulled against said end face of the input shaft.

Abstract: A jack assembly is shown and describe. The jack assembly may include a first tube having first and second end portions and a central portion between the first and second end portions, and a second tube positioned within the first tube and movable with respect to the first tube. The jack assembly may also include an expanded portion on the first tube, the expanded portion having a larger inner diameter than an inner diameter of the central portion, and a bushing attached to the expanded portion, where the bushing generally prevents contact between the first and second tubes.

Abstract: A jack for use with a towed vehicle is disclosed. The jack may include a first housing, a pair of cam surfaces, and a second housing telescopically moveable relative to the first housing. The jack may also include a pair of engaging members positionable to a first position generally inhibiting relative telescopic movement between the first and second housings and a second position generally not inhibiting relative telescopic movement between the first and second housings, and a handle attached to the engaging members, where the handle is selectively positionable along the cam surfaces positioning the engaging members to the first and second positions.

Abstract: An air driven actuator (100) uses oppositely disposed reciprocating air drivers (122, 124) to cause a single ratchet (146) to rotate via a drive plate (150) and a pawl (170). The ratchet (146) rotates a drive tube (144) that can further extend or retract landing gear on a semi-trailer.

Abstract: Presented is a trailer tongue lift jack which tilts in order to allow the tongue and hitch to be aligned with a towing ball attached to a towing vehicle. The trailer lift jack includes a ball joint which allows the body of the hitch to tilt for this alignment step. The lift jack can also rotate to a storage position which is basically horizontal, and rotate to a lift position which is basically vertical for lifting the trailer tongue.

Abstract: A trailer adapted to be coupled to a tow vehicle and including a frame including a draw bar tube defining a longitudinal axis. The trailer includes a drawbar support pivotally coupled to the draw bar tube and rotatable relative to the drawbar tube about an axis parallel to the longitudinal axis. The drawbar support is biased toward a substantially horizontal orientation. A sliding member is receivable in the drawbar tube and is configured for movement along the longitudinal axis in response to movement of the tow vehicle. A latch member is connected to the sliding member. The latch member is configured to move in response to movement of the sliding member from a first position wherein the drawbar support is retained in a substantially vertical orientation to a second position wherein the draw bar support is free to rotate toward the substantially horizontal orientation.

Abstract: A trailer hitch jack for rapidly raising and lowering the tongue of a trailer.

Abstract: A trailer hitch is disclosed. Said trailer hitch comprises a first bracket assembly, a second bracket assembly, a coupler assembly, and a jack assembly. Said jack assembly is capable of mechanically adjusting first bracket assembly relative to second bracket assembly. Said coupler assembly is capable of releasably attaching to a hitch on a vehicle.

Abstract: An improved jack assembly for use with a trailer tongue of a towed vehicle. The jack assembly including telescoping height adjustment of the assembly, a pivot assembly for pivoting between a vertical and horizontal stowed position, and a clip for maintaining a handle assembly in a stowed position when not in use. The jack assembly also includes the use of bushings for the telescoping tubes to enhance the sliding movement between the tubes and aid in maintaining the axial alignment of the tubes thereby extending the life of the jack assembly. The pivot assembly further includes an attachment bracket that may be rotated to accommodate at least two different sizes of trailer tongues.

Abstract: An improved jack assembly for use with a trailer tongue of a towed vehicle. The jack assembly including telescoping height adjustment of the assembly, a pivot assembly for pivoting between a vertical and horizontal stowed position, and a clip for maintaining a handle assembly in a stowed position when not in use. The jack assembly also includes the use of bushings for the telescoping tubes to enhance the sliding movement between the tubes and aid in maintaining the axial alignment of the tubes thereby extending the life of the jack assembly. The pivot assembly further includes an attachment bracket that may be rotated to accommodate at least two different sizes of trailer tongues.

Abstract: A retractable jack foot for a trailer hitch jack is disclosed, for rapidly raising and lowering the tongue of a trailer. The retractable jack foot solves multiple prior art problems discussed above in the “Description of Related Art,” such as: trailer hitch jacks not being long enough to reach the ground and still lift the trailer to a sufficient height (small distance travel); the laborious, time-consuming practice of cranking a trailer hitch jack all the way to the ground before finally causing lift in the trailer. In both cases, blocks of wood or other spacers are sometimes used to reduce the travel of the jack. The retractable jack foot of the present disclosure, solves those problems, by providing a “built in” block, or foot, pivotally attached to the bottom of the trailer hitch jack. The jack foot can be rotated into and out of position as desired, to quickly lengthen or shorten the jack.

Abstract: A jack for use with a towed vehicle is disclosed. The jack may include a first housing, a pair of cam surfaces, and a second housing telescopically moveable relative to the first housing. The jack may also include a pair of engaging members positionable to a first position generally inhibiting relative telescopic movement between the first and second housings and a second position generally not inhibiting relative telescopic movement between the first and second housings, and a handle attached to the engaging members, where the handle is selectively positionable along the cam surfaces positioning the engaging members to the first and second positions.

Abstract: A mounting adapter for mounting a jack to a trailer coupler and/or a trailer frame is described. The mounting adapter may permit the jack to mount to the trailer coupler while retaining both vertical and axial adjustability. The mounting adapter may include a flange and a collar. The flange may include an opening for receiving the jack and at least one mounting aperture for attachment with the trailer frame. The collar may extend outward from the flange and have at least one aperture for attachment with the jack. The collar may also include a rib located for engagement with a slot on the jack. The trailer coupler and frame may include apertures alignable to the mounting apertures, whereby the mounting apertures may permit orientation of the jack to be forward, left, right or rear facing. The mounting adapter may also be vertically adjustable to the jack.

Abstract: Presented is a trailer tongue lift jack which tilts in order to allow the tongue and hitch to be aligned with a towing ball attached to a towing vehicle. The trailer lift jack includes a ball joint which allows the body of the hitch to tilt for this alignment step. The lift jack can also rotate to a storage position which is basically horizontal, and rotate to a lift position which is basically vertical for lifting the trailer tongue.

Abstract: A support jack, in particular for supporting semitrailers, includes a vertically telescopically displaceable supporting element having an outer sleeve, and an inner sleeve that can be vertically displaced in a telescopic fashion, each sleeve having a rectangular cross-section with four sidewalls. At least the inner sleeve has a wall plate joined to two adjacent side walls with welding seams that improve the bending stiffness of the support jack. The welding seams can be located inside or outside either of the sleeves. Such a support jack can be located on the lower side of any vehicle.

Abstract: A slidable adjustable jacking device where the numbers of rotations of a hand crank on a jacking device may be greatly reduced by using a slidable screwjack inner member to re-position a load-carrying member. New in the art is the use of a slidable screwjack inner member and an affixed bar within a tubular outer member and an affixed passageway. This invention re-positions a slidable screwjack inner member to a location and then pins the member such that the member is fixed relative to a trailer. The device is useful for raising or lowering the tongue of a trailer.

Abstract: A trailer accessory featuring a first half base and a second half base slidably attached to the first half base via a sliding mechanism, the first half base can slide in a first or second direction with respect to the second half base; handles disposed on the top surface of the base near the side edges; a support platform disposed in between handles; wherein when the accessory is used, the accessory is placed under the jack stand of the trailer with the second half base contacting the ground surface, the tongue of the trailer is positioned atop the support platform, a truck is backed up such that the hitch of the truck is in close proximity to the tongue of the trailer, and when the truck is stopped, the first half base can be slid so to align the tongue of the trailer with the hitch.

Abstract: A jack assembly for adjusting the height of a trailer is provided. The jack assembly is moveable between an operable and a stowed position. The assembly includes a tube having a slot portion and a slide block moveable within the slot portion. A post connected to the slide block protrudes through an opening in the slot portion to engage a clamping mechanism. The clamping mechanism is movable between a clamped position where the slide block is clamped to the tube to prevent the jack from moving, and an unclamped position where the slide block is movable within the slot portion to allow the jack assembly to be moved between an operable position and a stowed position.

Abstract: A semitrailer landing gear, particularly for supporting trailers, including a supporting element, which can be telescopically displaced in the height thereof and which has an outer sleeve and an inner sleeve, the outer sleeve having a fastening flange for placing on a vehicle. The aim of the invention is to develop semitrailer landing gears with a reduced weight as well as with favorable manufacturing costs. To this end, the invention provides that at least one lateral wall of the outer sleeve and/or of the inner sleeve is provided with an angled wall section extending in an axial direction.

Abstract: A trailer jack capable of rapid gross and incremental adjustments in height adapted for attachment to a trailer. The jack is comprised of an inner member nested within an outer member, a collar, a housing and a pin. The inner member is threadably connected to the outer member with a bolt having a crank attached at one end. The bolt enables incremental adjustments in the trailer height by extension and retraction of the inner member with respect to the outer member. The connected outer and inner members are secured to the trailer with a pin inserted through the housing, a hole in the collar and one of a plurality of longitudinal holes in the outer member. To create rapid gross adjustments in the trailer height, the pin is retracted, a different hole in the outer member is registered with the hole in the collar and the pin re-inserted.

Abstract: The present invention may be used for leveling a land vehicle. A frame lifting assembly may have a frame cross-member adjustable in length for attachment at each end to each side of a vehicle frame. A folding jack with a force element and a folding leg may be attached to the frame cross-member. The folding leg may have a leg member with a foot attached at a first end to a force rod of the force element. A support arm may be rotatably attached intermediate the first end and the second end of the leg member and may be rotatably attached adjacent a second end of the frame cross-member. A positioning rod may be rotatably attached at the first end of the leg member and rotatably attached to the frame member. The force rod may be movably attached to a fixed element of the force element and the fixed element may be attached to the frame cross-member.

Abstract: A receiver extends from the top of a retractable wheel assembly to receive the lower end of a jackstand or the like. Upon exerting pressure on a foot operated plate, a wheel is extended from the bottom of a plate and locked in place with a catch to permit transport of a trailer or the like attached to the jackstand. Upon release of the catch, the wheel will retract to bring the plate into contact with the ground and immobilize the trailer.

Abstract: A jack assembly including a jack body sub-assembly and a swivel plate. The jack assembly preferably includes the following indicators: (i) at least one jack extension indicator for indication the extension position of the jack; and/or (ii) a disengagement indicator for indicating disengagement of rotational constraints as between the jack body sub-assembly and the load to which the jack is secured (for example, the swivel plate on the tongue of a trailer). In a preferred embodiment, the fixed-engagement indicator takes the form of a marking on a pin that: (i) engages with a swivel plate to rotationally constrain the jack body with respect to the swivel plate; and (ii) disengages with the swivel plate to allow relative rotation of the jack body relative to the swivel plate.

Abstract: A mounting adapter for mounting a jack to a trailer coupler and/or a trailer frame is described. The mounting adapter may permit the jack to mount to the trailer coupler while retaining both vertical and axial adjustability. The mounting adapter may include a flange and a collar. The flange may include an opening for receiving the jack and at least one mounting aperture for attachment with the trailer frame. The collar may extend outward from the flange and have at least one aperture for attachment with the jack. The collar may also include a rib located for engagement with a slot on the jack. The trailer coupler and frame may include apertures alignable to the mounting apertures, whereby the mounting apertures may permit orientation of the jack to be forward, left, right or rear facing. The mounting adapter may also be vertically adjustable to the jack.

Abstract: A connector assembly for mounting on a connector arm of a trailer to facilitate easy alignment of the trailer connector arm with a hitch of a towing vehicle. The connector assembly can move the connector arm up and down, side-to-side and drive forward and reverse in relation to the towing vehicle.

Abstract: A jack assembly for adjusting the height of a trailer is provided. The jack assembly is moveable between an operable and a stowed position. The assembly includes a tube having a slot portion and a slide block moveable within the slot portion. A post connected to the slide block protrudes through an opening in the slot portion to engage a clamping mechanism. The clamping mechanism is movable between a clamped position where the slide block is clamped to the tube to prevent the jack from moving, and an unclamped position where the slide block is movable within the slot portion to allow the jack assembly to be moved between an operable position and a stowed position.

Abstract: A carpentry tool for the installation of parallel boards includes an elongated lever having a rotatable cam pivotally affixed adjacent to a distal end of the lever, a gripper body pivotally affixed at a distal end of the lever, the gripper body having two lugs or brackets extending downward from the lower end of the gripper body, wherein the gripper body includes a multi-piece telescopic section having outer and inner tubing members in slidable engagement, the one tubing member including a first lug or bracket on a lower face thereof, another tubing member including a second lug or bracket on a lower face thereof, opposing the first bracket, and a spindle extending from an upper face of the gripper body, and a mechanism for reversibly adjusting the sliding tubing members at predetermined points.

Abstract: An hydraulically extensible frame is coupled to the hitch portion of a trailer by a pivoting mount. The pivoting mount permits the frame to pivot between a generally vertical operative position and a generally horizontal stowed position. A foot member is secured to an end of the frame opposite the pivoting mount. The foot member engages the ground. An actuator is carried by the frame in a location adapted to be engaged by a foot of a human user when the frame is in the operative or deployed position. The actuator pivots relative to the frame for storage and use as a handle. The actuator selectively extends the frame to raise the hitch portion in response to actuation by the foot of the user.

Abstract: The subject invention pertains to a method and apparatus for providing a trailer jack mount. The subject invention also pertains to a method and apparatus for providing a trailer jack mount for use with towable trailers. The subject invention is advantageous for use with trailers, such as utility trailers, which are frequently moved between various locations. The subject apparatus can also enable the mounting of a trailer jack to a trailer such that the trailer jack can quickly transition up or down relative to the trailer. In a specific embodiment, the subject invention includes a first piece mountable to a trailer and a second piece to which a trailer jack can be secured. In this embodiment, the subject apparatus also includes means for securely attaching the second piece to the first piece and allowing the second piece to pivot relative to the first piece. Advantageously, the subject invention can either be retrofitted to an existing trailer with jack, or installed at original manufacture.

Abstract: A trailer jack including trailer securing hardware, a support post assembly and a wheel. The support post assembly includes jacking hardware and a spring scale. The trailer securing hardware secures a trailer so that it is supported by the support post assembly and the spring scale indicates the tongue weight of the trailer. The wheel allows the trailer to be moved around when it is hooked up to the jack. In one kind of design, the spring is located between the trailer securing hardware and the wheel. In another kind of design, the spring is located above the trailer securing hardware, distally from the wheel.

Abstract: A trailer hitch jack for rapidly raising and lowering the tongue of a trailer.

Abstract: An improved jack assembly for use with a trailer tongue of a towed vehicle. The jack assembly including telescoping height adjustment of the assembly, a pivot assembly for pivoting between a vertical and horizontal stowed position, and a clip for maintaining a handle assembly in a stowed position when not in use. The jack assembly also includes the use of bushings for the telescoping tubes to enhance the sliding movement between the tubes and aid in maintaining the axial alignment of the tubes thereby extending the life of the jack assembly. The pivot assembly further includes an attachment bracket that may be rotated to accommodate at least two different sizes of trailer tongues.

Abstract: A powered, directionally steerable trailer jack that can be used to elevate and lower a trailer tongue and having a caster wheel assembly affixed to a lower end of the jack. The caster wheel assembly includes a shroud having the wheels' axle journaled for rotation at a lower end thereof along with a pair of shafts also journaled for rotation in the shroud and oriented parallel to the axle. A chain and sprocket arrangement provides a low-speed, high torque transmission between one of the shafts and the axle and a high-speed, low torque transmission between the other of the shafts and the axle. The trailer jack assembly can be tilted out of its vertical disposition to provide adequate clearance when the trailer is being pulled over uneven road surfaces. The power for driving the wheels may be provided manually by means of a crank for turning one or the other of the shafts or by an electric motor coupled one of the shafts.

Abstract: The “Universal Utility Trailer” Tilter is designed to be portable and lightweight. This will enable the user to insert it into a standard 2? receiver hitch on a tow vehicle. Upon attaching the Trailer Tilter to the vehicle the operator can attach any one of a number of Utility Trailers to the Trailer Tilters 2? ball. By removing the locking pin and operating the mechanism the operator can raise the front of the Utility Trailer thus lowering the rear to a desired level for loading equipment, cars or material. The lowering of the rear of the Utility Trailer until the ramps are level with the bed will prevent the equipment from dragging on either the front or middle while loading. Once loaded the operator can lower the Tilter back to its locking position and insert the locking pin for towing.