Abstract: A garment transportation and the drying device is provided with a transportation frame for carrying a container for garments, and a drying frame, the drying frame being deployable for supporting garments to be dried when the device is used in drying mode. The transportation frame provides support for a container such as a hockey bag and may be mounted on wheels to operate as a dolly. The drying frame includes a series of drying supports, preferably in the form of cantilevered arms extending from a central support post. Items to be dried such as gloves, etc., may be slid over the free ends of the cantilevered arms.

Abstract: Apparatus and methods are disclosed for passive stabilization of a wheeled object by employing secondary wheels rotating about secondary axes offset from a common axis of a primary set of wheels, where the secondary wheels are positioned such that tilting of the object during rolling causes one of the secondary wheels to contact the surface and counteract tilting tendencies. The offset of the secondary axes can include angular, vertical, and/or horizontal components.

Abstract: A handcart having two wheel assemblies rotably mounted to a fixed axle and two adjustable secondary wheel assemblies rotably mounted to the distal ends of two parallel and spaced apart legs pivotally mounted at their other ends to the handcart frame members. The plate is mounted to a fixed location on the frame and the pivoting legs include elongated slots that receive inwardly extending pivoting axles perpendicularly mounted to the pivoting legs. The pivoting legs are releasably adjusted at one of a plurality of angular positions with a positioning mechanism on each of the pivoting legs that includes a curved plate with indentations.

Abstract: The present invention is directed to a generally L-shaped frame assembly or dolly for mechanical devices, such as generators. The assembly includes a first and second frame portions. The first frame portion includes intermediate segments which are substantially equal or greater than the length of the mechanical device so as to protect the device and provide a lifting point for hoisting.

Abstract: A multifunctional handcart includes a main body, a telescopically arranged handle assembly retractably mounted on the main body, an adjusting seat adjustably mounted on the handle assembly, and a foldable table pivotally mounted on the adjusting seat. Thus, the table is fully expanded to place a notebook computer so that a user can operate notebook computer easily and conveniently. In addition, the adjusting seat is adjustably mounted on the handle assembly by the screw member to adjust the height of the table so as to fit users of different statures.

Abstract: A suitcase having a telescoping pull handle and a set of spaced apart wheels, between the back panel and bottom wall of the suitcase housing, permits easy movement over a planar surface. A staggered wheel mechanism is pivotally mounted on the back panel of the suitcase for improved mobility of the suitcase over a flight of stairs.

Abstract: Embodiments of the invention provide a trolley apparatus having a hand trolley use configuration and a platform trolley use configuration. The apparatus comprises a body and first and second sets of ground engaging wheels. The body is adapted to be loaded with goods when in either configuration. The first set of wheels have a common axis, are adapted to be attached to the body and are movable between two positions: a first position adjacent one end of the body when in the hand trolley configuration, and a second position adjacent the other end of the body when in the platform trolley configuration. The first set of wheels are adapted to engage the ground when in either of the configurations. The second set of wheels have a common axis, are attached to one end of the body and are adapted to engage the ground when in the platform trolley configuration.

Abstract: A cart includes a base having a plurality of wheels. A first frame portion is pivotally attached to the base. A second frame portion is pivotally attached to the first frame portion. The second frame portion has a frame handle. A rack is pivotally attached to the first frame portion. The rack has a plurality of slots, indentations, or cut-outs arranged in pairs on opposite sides of the rack. Each pair of slots, indentations or cut-outs is capable of receiving a respective handle of a respective bag, box or parcel hanging from the rack. A retaining member is attachable to the rack so as to overlie each respective handle of a bag, box or parcel, securing the bag, box or parcel when the retaining member is attached to the rack.

Abstract: A portable collapsible stand includes first, second, and third support frames, a work surface frame, and a telescoping strut pivotably connected to the first and work surface frames. The second frame projects perpendicularly from a lower portion of the first frame. A first end of the third frame is rotatably connected to an upper portion of the first frame such that the third frame pivots from a first parallel position to a second perpendicular position with respect to the first frame. An upper portion of the work surface frame is rotatably connected to the upper portion of the first frame. In operation, the stand can assume a collapsed position in which the first, third and work surface frames are generally parallel, and an operating position in which the third frame and first frame are perpendicular and the work surface frame and surface supporting the stand are parallel.

Abstract: The present invention relates to a luggage cart with a telescoping handle and fixed wheels including the addition of a foldable supportive wheel structure which is incorporated within the telescoping handle of a conventional luggage cart with fixed wheels to reduce the load that is applied to a user when a conventional luggage cart is employed.

Abstract: In accordance with the present invention, a shopping bag carrier is described which is light in weight, easily portable by collapsing to a very small foot print and is simple to manufacture and use without complex mechanisms and linkages.

Abstract: A portable, collapsible rickshaw like carrier has a collapsing main base which allows the rickshaw to be easily stored or transported.

Abstract: An auxiliary wheel set adapted for aftermarket installation on two-wheeled hand trucks. The apparatus includes a right vertical support and left vertical support, each having a leg portion with an upper section and a lower end, and a shoulder at its upper portion from which an upper arm extends outwardly substantially perpendicular to the leg. Each upper arm terminates in a curved elbow which connects the upper arm to a lower arm which extends inwardly and substantially parallel to the upper arm. A spreader bar is welded between the vertical supports to provide bracing. Locking caster wheels are disposed on the respective lower ends of the legs. The lower arms are journalled in bushings, which are, in turn, removably installed onto the side rails of a hand truck with U-bolts attached to first and second integral pivot plates. The wheel set selectively pivots between a stored position and a deployed position.

Abstract: A guide cart for an implement including a frame on which is disposed at least two wheels, and a first strut on which is disposed at least one wheel, and a second strut, wherein for a mounting of said second strut on said frame at least two spaced-apart mounting points are provided.

Abstract: A lower cradle and wheel bracket arrangement for golf cart is constructed to include a cradle body, a support member pivoted to the cradle body, a wheel bracket pivoted to the support member and holding a front wheel, a first lock adapted to lock the support member to the cradle body, and a second lock adapted to lock the wheel bracket to the support member.

Abstract: A transporting device has a container, a panel member, a wheel frame and two wheels. The panel member has a plate and two first linkages pivoted on the plate and on lateral sides of the container respectively. The wheel frame has two second linkages pivoted on mid sections of the first linkages respectively and the wheels are mounted on the second linkages. The panel member is moved between a collapsed position, in which the plate is attached on the container and the wheels are moved to the lateral sides of the container respectively, and an expanded position, in which the plate and the wheels are moved apart from the container. The container is provided with a shaft with a handle and a front wheel on opposite ends to control the direction of the transporting device to go. A motor and a transmission device are provided to drive the transporting device to run.

Abstract: The apparatus is a highly maneuverable, curb mounting double baby stroller. To improve maneuverability, the rear wheels are placed closer than usual to the front wheels, decreasing the wheelbase and providing greater leverage between the rear wheels and the rear handle. To compensate for the instability caused by the reduced wheelbase, a trailing support is provided behind the rear wheels. The trailing support may be a simple bar extension or have small wheels. The trailing support can be unlatched to permit it to pivot for lifting the front wheels to mount a curb.

Abstract: A hand truck or cart has a frame with telescopic segments and wheels mounted to a lower end of the frame for maneuvering the frame on a support surface. The frame has an extended position for operational use and a collapsed position for storage purposes. When the frame is in the collapsed position, it has a vertical height that is only a fraction of its height when in the extended position. Each of the telescopic arms have locking elements for securing the frame in the extended position. The cart also has pivotable support and fork platform for supporting the loads. The support platform can be raised and lowered along the length of the frame with a winch assembly that is mounted to the frame. The cart is also provided with a pair of supplemental support legs for providing additional support for the frame.

Abstract: A hand truck includes a main frame, a movable frame pivotally connected with the main frame, a wheel set, and a handle able to be connected with the main frame with its height adjustable or to be connected with a handle receiving short tube fixed upright on the main frame in case of transforming the two wheeled hand tuck, two wheel supporters fixed under the main frame for additionally combining two independent wheels for transforming the two wheeled hand truck into a four wheeled one.

Abstract: A lifting and telescoping dolly for facilitating the moving of bulky objects into and out of attics by one operator acting alone. The collapsible dolly opens into a self-supporting A-frame with four support points. It has wheels and a brake system for positioning the dolly beneath an attic entry. From ground level a winch elevates the telescoping upper part of the dolly frame into the attic where it is firmly supported. From the attic a second winch elevates the load into the attic.

Abstract: An ability to move a wheelbarrow without lifting the rear part of the wheelbarrow is achieved by attaching a handle adapter that extends upward from the rearwardly extending handles of the wheelbarrow. Further, a converter kit converts a conventional single wheeled wheelbarrow into a three wheeled device. The handle adapter is a tubular construction and can be easily detached from the wheelbarrow. In one embodiment of the converter kit, a plate and a hollow tube are attached to generally U shaped resting arms for easy assembly and disassembly of auxiliary wheels. A second embodiment of the converter kit includes a clamp for easily adjusting the auxiliary wheels of the wheelbarrow.

Abstract: Removable large wheels for a luggage case, having two permanent sleeves inserted in holes drilled in pre-existing mounting blocks which contain pre-existing small wheels. Two axles, one in each of the sleeves, with a permanent stop at the inner end of each axle and a fastener at the outer end of each axle. The large wheels have an extended tubular part at the hub of the inner side of each wheel which prevents the wheel from touching the outer edge of the luggage. The axle can be extended outward to accept the large wheel, which is kept in place by a fastener at the outer end of each axle; or, when not in use, the axle can be retracted back into the sleeve and the wheels stored in pockets on the exterior of the luggage case. The axles are prevented from sliding part way back out of the sleeves by a fastener at a point just outside the inner end of the sleeve, and kept from slipping all the way out by a stop which is permanently affixed to the inner end of the axle and is of the same diameter as the sleeve.

Abstract: An auxiliary wheel set adapted for aftermarket installation on two-wheeled hand trucks. The apparatus includes a right vertical support and left vertical support, each having a leg portion with an upper section and a lower end, and a shoulder at its upper portion from which an upper arm extends outwardly substantially perpendicular to the leg. Each upper arm terminates in a curved elbow which connects the upper arm to a lower arm which extends inwardly and substantially parallel to the upper arm. A spreader bar is welded between the vertical supports to provide bracing. Locking caster wheels are disposed on the respective lower ends of the legs. The lower arms are journalled in bushings, which are, in turn, removably installed onto the side rails of a hand truck with U-bolts attached to first and second integral pivot plates. The wheel set selectively pivots between a stored position and a deployed position.

Abstract: A front wheel adjusting device for a golf cart includes a U-shaped support frame and a front wheel. The support frame has two parallel rods with inner ends respectively bored with a vertical groove. The front wheel has a shaft hole for a shaft to insert, which has its opposite ends respectively bored with a threaded hole. Two fixing members has a slide groove and a lengthwise straight groove, connected with the ends of the shaft, and a threaded rod is inserted in the straight groove of the fixing member and the threaded hole of the shaft and secured on the fixing member. Then, the two fixing members are respectively stuffed into the two parallel rods. Thus, turning the threaded rod can move up and down the shaft for adjusting the front wheel.

Abstract: A front wheel adjusting device for a golf cart includes a U-shaped support frame and a front wheel. The support frame has two parallel rods with inner ends respectively bored with a vertical groove. The front wheel has a shaft hole for a shaft to insert, which has its opposite ends respectively bored with a threaded hole. Two fixing members has a slide groove and a lengthwise straight groove, connected with the ends of the shaft, and a threaded rod is inserted in the straight groove of the fixing member and the threaded hole of the shaft and secured on the fixing member. Then, the two fixing members are respectively stuffed into the two parallel rods. Thus, turning the threaded rod can move up and down the shaft for adjusting the front wheel.

Abstract: An open shipyard feeder for supplying a consumable welding wire on a wire spool to a welding gun. The feeder includes a frame having a base extending in a longitudinal direction between a forward end and a rearward end and which supports the feeder on an underlying surface. The frame further includes a spool support means connected to the frame near the rearward end and which rotatably retains the wire spool relative to the frame allowing the spool to rotate about a spool axis. The feeder includes a wire advancing mechanism mounted on the frame for paying wire from the spool on the spool support to the welding gun. The feeder further includes a control box on the frame near the forward end. The feeder frame is rigid yet light weight and can support the wire feeder on a wide range of underlying surfaces while still being easily transportable.

Abstract: Foldable tool cart (10) including a base (15) supporting a vertical post (71) of adjustable height, lower tool tray (100) supported by base (15), an upper tool tray (110) supported by post (71), and pivots (60, 120) for folding cart (10) such that trays (100, 110) are substantially vertical. A tool caddy (150), attached to post (71), remains upright when cart (10) is folded.

Abstract: A portable and slidable bag/box comprises an article holding body which is provided in the interior with a receiving space and in the lower portion with at least one wheel body to roll on the ground surface. A pull rod is disposed with the article holding body to serve as a hand grip. A slide board is provided in the rear with at least one rear wheel. The slide board is connected at the front with the article holding body by a connection mechanism which enables the slide board to be folded into the article holding body and to be unfolded under the article holding body. When the side board is folded into the article holding body, the article holding body is a portable bag/box, which can be pulled to slide by a user holding the pull rod. When the slide board is unfolded under the article holding body, the user holds the pull rod to steer the portable bag/box while riding on the slide board, with one foot pushing against the ground surface.

Abstract: Narrow aisle truck that on each side includes two forwards extending support legs (1, 2), which each are provided with two support wheels (4, 5). The two outer support wheels are displaced somewhat to the rear in relation to the inner ones and in the corner space outside the inner ones and in front of the outer support wheels lateral guide wheels (6) are arranged.

Abstract: A cart moving system and individual hand carts therefor. First and second hand carts can be lashed together with the item therebetween. Auxiliary wheel assemblies are provided for each hand cart, to facilitate transport across uneven and irregular surfaces by using auxiliary wheels of large diameter. The auxiliary wheel assemblies can be installed or removed from the cart while a load is supported on the cart.

Abstract: A cart moving system and individual hand carts therefor. First and second hand carts can be lashed together with the item therebetween. Auxiliary wheel assemblies are provided for each hand cart, to facilitate transport across uneven and irregular surfaces by using auxiliary wheels of large diameter. The auxiliary wheel assemblies can be installed or removed from the cart while a load is supported on the cart.

Abstract: A portable and slidable bag/box comprises an article holding body which is provided in the interior with a receiving space and in the lower portion with at least one wheel body to roll on the ground surface. A pull rod is disposed with the article holding body to serve as a hand grip. A slide board is provided in the rear with at least one rear wheel. The slide board is connected at the front with the article holding body by a connection mechanism which enables the slide board to be folded into the article holding body and to be unfolded under the article holding body. When the side board is folded into the article holding body, the article holding body is a portable bag/box, which can be pulled to slide by a user holding the pull rod. When the slide board is unfolded under the article holding body, the user holds the pull rod to steer the portable bag/box while riding on the slide board, with one foot pushing against the ground surface.

Abstract: A multi-level personal utility cart is disclosed as including a handle having an upper portion, opposing side portions and a lower portion, a first basket assembly including panels at the front, sides, and bottom thereof, the first basket assembly being supported by the handle, a second basket assembly including panels at the front, sides, and bottom thereof, the second basket assembly being supported by the handle, the first basket assembly being positioned atop the second basket assembly, and the first and second basket assemblies being pivotally supported to the handle, whereby the first and second basket assemblies are collapsible into a compact and substantially planar structure.

Abstract: A multi-level personal utility cart is disclosed as including a handle having an upper portion, opposing side portions and a lower portion, a first basket assembly including panels at the front, sides, and bottom thereof, the first basket assembly being supported by the handle, a second basket assembly including panels at the front, sides, and bottom thereof, the second basket assembly being supported by the handle, the first basket assembly being positioned atop the second basket assembly, and the first and second basket assemblies being pivotally supported to the handle, so that the first and second basket assemblies are collapsible into a compact and substantially planar structure. An access door to the lower basket assembly is provided.

Abstract: A bed resting on a floor includes a base frame, a plurality of casters coupled to the base frame and configured to engage the floor, a first brake coupled to the base frame, a foot pedal actuator movable between a first position and a second position, and a second brake coupled to the base frame. A linkage is configured to couple the second brake to the first brake so that when the foot pedal actuator is moved to the second position, the first and second brakes both move to a braking position and when the foot pedal actuator is moved to the first position the first and second brakes both move to a releasing position.

Abstract: A suitcase has first rollers mounted thereon to at least partially support the suitcase when in an upright position and to enable rolling movement of the suitcase across a surface. The first end of an arm is pivotally mounted to a rigid body portion of the suitcase. Second rollers are mounted about adjacent to the second end of the arm to enable rolling movement of the suitcase across the surface. A first link is pivotally mounted to the rigid body portion, and a second link is pivotally mounted to the first link and the arm. The arm is alternately retractable to a retracted position about adjacent to a rear panel of the suitcase, and deployable to a deployed position spaced outwardly from the rear panel. The first and second rollers cooperate to fully support the suitcase when the second rollers are deployed and the suitcase is in a rolling position. A push/pull handle is mounted on the suitcase to enable a user to roll the suitcase across the surface.

Abstract: A work load lifting and moving apparatus is formed by a wheel supported horizontal main frame in turn supporting a mast assembly having a vertically reciprocal lifting frame gripping and lifting the work load by a hoist supported by the mast assembly. Other lifting apparatus supported by the main frame tilts the vertical axis of the work load in a forward direction.

Abstract: A human assisted walking robot formed by a motor, a cargo bin, a pair of legs mounted to the carrier; and a stabilizing support mounted at its proximal end to the carrier and having a wheel rotatably mounted to the distal end. The motor drives the first and second leg members resulting in a walking motion. Each leg is formed by a thigh link and a shank link. A four-bar linkage is coupled between the motor and the thigh and shank of each leg so that rotational motion generated by the motor produces a walking motion by the legs.

Abstract: A work load lifting and moving apparatus is formed by a wheel supported horizontal main frame in turn supporting a mast assembly having a vertically reciprocal lifting frame gripping and lifting the work load by a hoist supported by the mast assembly. Other lifting apparatus supported by the main frame tilts the vertical axis of the work load in a forward direction.

Abstract: A work load lifting and moving apparatus is formed by a wheel supported horizontal main frame in turn supporting a mast assembly having a vertically reciprocal lifting frame gripping and lifting the work load by a hoist supported by the mast assembly. Other lifting apparatus supported by the main frame tilts the vertical axis of the work load in a forward direction.

Abstract: In a wheel barrow having a load carrying container disposed between a rotatable wheel and a handle, an adapter apparatus is disclosed for assisting transportation of the wheelbarrow. The adapter apparatus includes a frame having a first and a second end and an axle having a first and a second side. The axle extends through the frame and the rotatable wheel such that the rotatable wheel rotates about the axle. Additionally, the axle pivotally supports the wheel barrow such that pivotal movement of the wheel barrow about the axle and relative to the frame is permitted. A rotatable device is secured to the frame so that the container is disposed between the axle and the rotatable device. The arrangement is such that in a first mode of operation of the apparatus, the wheel barrow is supported by the frame and is transported on the rotatable wheel and the rotatable device for transportation of the load disposed within the container.

Abstract: A hand truck convertible into either one of a cart and an inclined cart includes a primary frame having a first pair of wheels rotatably mounted thereon. A secondary frame is pivotally attached to the primary frame and has at least one additional wheel rotatably mounted thereon. A connecting member is attached to the secondary frame. A first locking mechanism is attached to the primary frame and detachably secures the secondary frame to the primary frame while the secondary frame is in the hand-truck-position and while the secondary frame is in the inclined-cart-position. A second locking mechanism is attached to the primary frame and detachably secures the connecting member to the primary frame while the secondary frame is in the inclined-cart-position. Alternatively, a channel is formed in the primary frame and the connecting member is slidably engaged with the channel.

Abstract: A luggage includes a frame body defining a holding space, the frame body having a main frame unit and a side frame unit pivoted to the main frame unit with an angle; a bag body, having at least one part installed in the holding space in the frame body; a handle for holding by the user; two wheel assemblies bilaterally mounted on a bottom side of the frame body, a main locating member and two upper locating members and two bottom locating members adapted to secure the bag body to the frame body, the locating members each having an interior piece attached to the inside of the bag body and an exterior piece attached to the outside of the bag body and fixedly fastened to the interior piece to secure the bag body to the frame body.

Abstract: A collapsible handle for a portable luggage is provided. The handle includes an upper seat and a lower seat spacedly secured to the top and lower portions of the back side of the portable luggage, an attachment slidably pivoted to a pair of rectangular recesses of the upper seat, an elongate caster seat including a pair of subordinate casters pivoted on two end which has an arcuate lower surface made engageable with a concaved engaging surface in the top of the lower seat, a pair of telescoped frame having their upper ends inserting through the attachment and secured to a handle grip above the attachment and their lower ends of the outmost portion secured to a pair of cavities at two end of the elongate caster seat and the inner portion respectively biased by a pair of post of a locking member which is in turn biased by a pair of springs inside the elongate caster seat.

Abstract: A suitcase has first rollers mounted thereon to at least partially support the suitcase when in an upright position and to enable rolling movement of the suitcase across a surface. The first end of an arm is pivotally mounted to a rigid body portion of the suitcase. Second rollers are mounted about adjacent to the second end of the arm to enable rolling movement of the suitcase across the surface. A first link is pivotally mounted to the rigid body portion, and a second link is pivotally mounted to the first link and the arm. The arm is alternately retractable to a retracted position about adjacent to a rear panel of the suitcase, and deployable to a deployed position spaced outwardly from the rear panel. The first and second rollers cooperate to fully support the suitcase when the second rollers are deployed and the suitcase is in a rolling position. A push/pull handle is mounted on the suitcase to enable a user to roll the suitcase across the surface.

Abstract: A supplemental wheel for a golf bag cart including a mounting block that is securable to a lower bag support of a golf bag cart. The mounting block has a generally rectangular configuration defined by a short top wall, a short bottom wall, long opposed front and rear walls, and right and left side faces. The mounting block includes an angular cut-out extending from the short bottom wall through the long rear wall. The short top wall is securable to the lower bag support whereby the cut-out is disposed in an essentially parallel relationship with a recipient surface that the golf bag cart is position on. A swivel wheel assembly is secured to the cut-out formed on the mounting block. The swivel wheel has a braking mechanism coupled therewith.

Abstract: A hand truck which comprises the following essential elements: (a) an elongate chassis having upper and lower ends and a first longitudinal axis between them; (b) a handle arranged at the upper end of the chassis; (c) load lifting platform arranged at the lower end of the chassis, the load lifting platform extending outward from the chassis along a second longitudinal axis which is substantially perpendicular to the first longitudinal axis; (d) a pair of truck wheels disposed on opposite sides of the chassis adjacent the lower end, the truck wheels being rotatable about a common wheel axis which extends transversely to both the first and the second longitudinal axes; and (e) a wheel axle carriage supporting the truck wheels and being pivotable with respect to the chassis for moving the wheel axis between a first position on one side of the second longitudinal axis and a second position on the opposite side of the second longitudinal axis.

Abstract: An auxiliary wheel assembly for permitting utilization of a wheel barrow as a wagon. The auxiliary wheel assembly includes a pair of support arms adapted for coupling to a wheelbarrow. Each of the support arms has a plurality of uniformly spaced apertures extending through it. An axle extends through an opposed pair of the apertures of the support arms. A pair of wheels are rotatably coupled to the axle and are positioned towards opposite free ends of the axle. In an alternate embodiment, an axle extends generally horizontally and is positioned towards apertures through resting arms of an existing wheelbarrow. A pair of wheels are rotatably coupled to the axle and are positioned towards opposite free ends of the axle. A pair of generally U-shaped bolts couple the axle to the resting arms. The bolts extend around the axle. Free ends of the bolts extend through adjacent pairs of apertures of the resting arms.

Abstract: A transporting apparatus with directional braking is provided including a frame and a pair of wheel assemblies at least one of which includes a wheel with a plurality of teeth formed therein. Also included is a pawl assembly pivotally coupled with respect to the frame and having a pair of ends for engaging the teeth of the wheel when the pawl assembly is in a first orientation to allow only forward movement of the wheel of the wheel assembly. The pawl further serves to engage the teeth of the wheel when the pawl assembly is in a second orientation to allow only rearward movement of the wheel of the wheel assembly. Finally, the teeth of the wheel are disengaged when the pawl assembly is in an intermediate third orientation to allow both forward and rearward movement of the wheel of the wheel assembly.

Abstract: An attachment assembly provides a secure attachment point for the fall arrest tether lines of safety harnesses of workers on flat roofs, the assembly being movable over the roof as required. The assembly can be used alone, but usually is mounted on a wheeled utility cart as employed by roofers to move materials on the roof, or may be an integral part of such a cart. The assembly has a base frame that is spaced from the roof edge over which the worker may fall. An attachment member for tether lines is mounted on the base frame together with at least two longitudinally spaced surface engaging arm, the arms being located at the frame side nearer to the roof edge. When the assembly is in operative position each arm has its lower end, which usually has teeth, close to the roof surface. A counterweight is mounted on the opposite side of the base frame.