US20160145879A1 - Drywall Lift - Google Patents
Drywall Lift Download PDFInfo
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- US20160145879A1 US20160145879A1 US14/947,589 US201514947589A US2016145879A1 US 20160145879 A1 US20160145879 A1 US 20160145879A1 US 201514947589 A US201514947589 A US 201514947589A US 2016145879 A1 US2016145879 A1 US 2016145879A1
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- Prior art keywords
- link structure
- stay
- drywall
- arm
- upright
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/18—Implements for finishing work on buildings for setting wall or ceiling slabs or plates
- E04F21/1805—Ceiling panel lifting devices
- E04F21/1822—Ceiling panel lifting devices with pivotally mounted arms
Definitions
- the present invention relates generally to a drywall lift which is based upon a four-bar linkage and is operable by a single person.
- the increased use of drywall in housing means the ability to easily and efficiently install drywall is essential to home contractors.
- the need is even greater for ceiling installations of drywall, as it is difficult for a single person to install drywall to ceilings.
- a cripple is a T-shaped brace constructed commonly of two 2′′ ⁇ 4′′ boards; usually the boards are about 2 & 8 feet long respectively.
- the two men carry the drywall sheet, holding it by its edges. Then the two men rotate the sheet up over their heads. First one man uses one hand to grab a cripple and place the cripple under the sheet. Then the second man does the same, and then the sheet is lifted to the ceiling. The cripples are wedged between the floor and ceiling to hold the sheet in place. Next drywall screws are used to attach the sheet to the ceiling rafters. This method works, but is not without its drawbacks.
- a light-weight panel of drywall (4′ ⁇ 8′ ⁇ 1 ⁇ 2′′ thick) weighs 40 pounds. This is a cumbersome weight even for a two man team, let alone an individual worker: it is nearly impossible for a single person to install a panel of drywall to a ceiling without help.
- a common drywall lift is one that works on the same principle of a single telescoping tube center assemble.
- the tube is mounted to a tripod base.
- a rack which holds the drywall sheet, is connected to the top of the tube assembly by a hinge.
- a hand-operated crank connected to a cable, pulley, and hoist, allows the tube to be moved up and down. This is similar to a boat hoist.
- the present invention seeks to address the shortcoming of current drywall installation methods by providing an apparatus which is easily operated by a single person. In addition to being able to be individually operated, the present invention functions well, and is used by commercial contractors, and some professional installers. However, the exiting lifts are somewhat complex, expensive, heavy, and slow in lifting.
- FIG. 1 is a perspective view of the present invention in a lifted position, wherein the working link structure is perpendicular to the upright link structure.
- FIG. 2 is a side view showing the present invention in the lifted position.
- FIG. 3 is a perspective view of the present invention in a folded position.
- FIG. 4 is a side view showing the present invention in the folded position.
- the present invention is a drywall lift that is operable by a single person.
- the present invention is designed for quick and easy assembly and disassembly with industry standard fasteners and tools. Additionally, the present invention can be easily handled, assembled, disassembled, and moved by a single non-professional person.
- the present invention is also projected to be 1 ⁇ 3 of weight and cost of any other existing apparatus that uses to lift drywalls.
- the present invention is implemented as a mechanical linkage, specifically a modified four-bar linkage, and as such comprises a base link structure 1 , an upright link structure 2 , a working link structure 3 , and a supporting link structure 4 .
- the base link structure 1 and the upright link structure 2 act as fixed links in the present invention, supporting hinged movement of both the working link structure 3 and the supporting link structure 4 .
- These combine into a linkage system with two pivots and one sliding connection.
- a first pivot is fixed to the upright link structure 2
- a second pivot moves in an arc relative to the first pivot.
- a sliding connection is between a floor and the bottom of the supporting link structure 4 , which drags across the floor during operation of the present invention.
- the base link structure 1 lies flat against a planar surface, e.g. a floor.
- the upright link structure 2 is connected atop the base link structure 1 ; these two structures serve as a fixed frame of the present invention.
- the upright link structure 2 being vertical, is oriented to be perpendicular to the base link structure 1 .
- the working link structure 3 comprises a drywall retaining shelf 31 , which allows a drywall panel to independently supported and manipulated (e.g. raised towards a ceiling for connection via ceiling rafters) by the present invention.
- the working link structure 3 is hingedly connected to the upright link structure 2 through a first axle 5 . As a result, the working link structure 3 can be rotated about a fixed end, i.e.
- the supporting link structure 4 is hingedly connected to the working link structure 3 through a second axle 6 . This allows the supporting link structure 4 to be rotated with respect to the working link structure 3 . This is important as the supporting link structure 4 can be used to support and secure the working link structure 3 at a non-equilibrium angle.
- the present invention when a drywall panel is loaded to the working link structure 3 , the present invention is in the folded position as the supporting link structure 4 can be either forward or rearward facing. When the working link structure 3 is used to raise a drywall panel to a ceiling.
- the supporting link structure 4 can support the working link structure 3 at multiple angles; for example, the supporting link structure 4 can be positioned at a 45 degree angle relative to the working link structure 3 and a floor, rather than a 90 degree angle (which would hold the working link structure 3 parallel to a ceiling). As the supporting link structure 4 drags along the floor during rotation of the working link structure 3 , it creates leverage and reduces the amount of effort required to be input by a user.
- FIG. 1 and FIG. 3 illustrate how the components of the present invention relate with respect to one another.
- a first buttress 7 and a second buttress 8 can be installed as part of the present invention.
- the first buttress 7 and second buttress 8 serve as braces between the base link structure 1 and the upright link structure 2 , helping to provide improved stabilization for the present invention.
- the first buttress 7 and the second buttress 8 are positioned opposite each other across the base link structure 1 and the upright link structure 2 . Effectively, the two buttresses are respectively positioned at the left side and the right side of the present invention.
- Each buttress is positioned at an angle relative to the base link structure 1 and the upright link structure 2 ; the first buttress 7 and second buttress 8 are both angularly connected between the base link structure 1 and the upright link structure 2 , albeit at opposite sides.
- the buttresses form a triangular shape in combination with the base link structure 1 and the upright link structure 2 .
- the buttresses can be seen in FIG. 1 - FIG. 4 .
- the first stay 41 and the second stay 42 being used to support the working link structure 3 , are each hingedly connected with the link structure by means of the second axle 6 . Resultantly, the first stay 41 and the second stay 42 can be rotated relative to the working link structure 3 . As the first stay 41 and the second stay 42 are meant to support the load of the working link structure 3 , they are positioned at opposite sides of the present invention. Resultantly, the first stay 41 is positioned adjacent with the first buttress 7 while the second stay 42 is positioned adjacent with the second buttress 8 . Each stay effectively remains coplanar with its corresponding buttress; this holds true when resting on a floor at an angle (i.e.
- first stay 41 and the second stay 42 can be rotated about the second axle 6 independently from each other; this improves safety of the present invention. Even if one of the stays is knocked away or otherwise fails, the other stay remains in place and support the drywall panel and working link structure 3 from falling, resulting in improved workplace safety.
- the drywall retaining shelf 31 which receives a drywall panel and secures said drywall panel during rotation towards a ceiling.
- the drywall retaining shelf 31 is adjacently positioned with a top surface 32 of the working link structure 3 .
- the drywall retaining shelf 31 is centrally connected to the working link structure 3 ; this central positioning means that a larger portion of the working link structure 3 will be available to bear the weight of the panel of drywall.
- the upright link structure 2 , the first stay 41 , and the second stay 42 each comprise a fixed member 91 , an extension member 92 , and a locking mechanism 93 .
- the extension member 92 is slidably engaged with the fixed member 91 , effectively allowing the extension member 92 to be raised or lowered in relation to the fixed member 91 . This allows an operator of the present invention to adjust the extension member 92 to a desired height.
- the locking mechanism 93 is mounted to the fixed member 91 and selectively engaged with the extension member 92 ; engagement of the locking mechanism 93 and the extension member 92 prevents movement of the extension member 92 . Disengaging the locking mechanism 93 from the extension member 92 allows movement of the extension member 92 . The locking mechanism 93 can be reengaged with the extension member 92 once the extension member 92 has been set to the desired height.
- the locking mechanism 93 is preferably a spring-loaded latch.
- the spring-loaded latch is engaged with the extension member 92 through a plurality of latch receptacles, the plurality of latch receptacles being positioned along the extension member 92 .
- a locking shaft of the spring-loaded latch is pressed against the extension member 92 ; when the locking shaft is aligned with one of the plurality of latch receptacles, the locking shaft traverses into the latch receptacle.
- the locking mechanism 93 is a clamp; by engaging the clamp pressure is applied to fixed member 91 and the extension member 92 . The resulting frictional forces prevent movement of the extension member 92 .
- the locking mechanism 93 is a screw lock. The screw lock, similar to the clutch lock, applies pressure to the extension member 92 and the fixed member 91 In order to prevent movement. Unscrewing the screw lock releases pressure and allows movement of the extension member 92 to a desired height.
- the locking mechanism 93 is a twist-lock similar to a painter's extension pole so that the extensions member 92 is able to move into a desired height in relation to the fixed member 91 .
- This along with the previous examples, is one of a few possible implementations for the locking mechanism 93 and doesn't not preclude the use of alternative implementations. Components related to the height-adjustable nature are shown through FIG. 1 - FIG. 4 providing an example of a height adjustment made through the present invention.
- the extension member 92 is shown as being adjacently engaged with the fixed member 91 . That is, the fixed member 91 serves as a track for the extension member 92 . Resultantly, the extension member 92 can slide along the track of the fixed member 91 in order to adjust the height of the present invention. In another embodiment, the extension member 92 traverses into the fixed member 91 , resulting in a telescoping connection between the extension member 92 and the fixed member 91 .
- locking mechanisms 93 such as a twist lock for the telescoping engagement.
- the present invention serves as a mobile apparatus which allows for a drywall panel to be raised to an elevated height by a single person.
- the working link structure 3 rests against the first buttress 7 and the second buttress 8 .
- the supporting link structure 4 i.e. the first stay 41 and the second stay 42 , are rotated such that they are parallel with the working link structure 3 .
- This provides better access to the working link structure 3 for a user of the present invention.
- the present invention is similar to an easel, allowing a drywall panel to easily be loaded onto the working link structure 3 and drywall retaining shelf 31 .
- the working link structure 3 can be rotated away from the upright link structure 2 and towards a ceiling as the bottom of supporting link structure 4 slides across the floor and pushes the working link structure 3 and the drywall up to the ceiling.
- the supporting link structure 4 is perpendicularly positioned with the floor into an upright position.
- the supporting link structure's 4 first stay 41 and second stay 42 can be independently, rotated, allowing a user to hold the working link structure 3 up with one hand while rotating the first stay 41 with their other hand.
- first stay 41 After rotating the first stay 41 to an upright position, a user can then rotate the second stay 42 to an upright position to further stabilize the present invention; with both stays rotated to an upright position, the upright link structure 2 , first stay 41 , and second stay 42 provide multiple load-bearing sections that are able to hold the working link structure 3 and drywall panel in a raised position.
- the present invention With the drywall panel being supported by a present invention, a user has both hands free.
- the panel can thus be mounted to the ceiling by a single person.
- the present invention can be adapted for use with ceilings of different height.
- the total height of the present invention can be increased or decreased. This increases flexibility of the present invention, as it is not limited to ceilings of a specific height.
- the base link structure 1 , the upright link structure 2 , and the working link structure 3 each comprise a number of frame pieces. More specifically, the base link structure 1 comprises a first leg 11 and a second leg 12 .
- the upright link structure 2 comprises a first pillar 21 and a second pillar 22 .
- the working link comprises a first arm 33 and a second arm 34 .
- These components effectively serve as a left side and a right side of the present invention, somewhat similar to the first buttress 7 and the second buttress 8 .
- the first pillar 21 is connected perpendicular to the first leg 11 .
- the second pillar 22 is connected perpendicular to the second leg 12 .
- the drywall retaining shelf 31 which helps secure and bear the load of the panel of drywall, is connected across the first arm 33 and the second arm 34 .
- the first arm 33 and the second arm 34 are rotatable with respect to the corresponding first pillar 21 and second pillar 22 .
- This coupling is enabled by the first axle 5 , which traverses through the first pillar 21 , the second pillar 22 , the first arm 33 , and the second arm 34 .
- the first axle 5 is positioned opposite the base structure along the first pillar 21 and the second pillar 22 , allowing the working link structure 3 to be rotated to the same height as the upright link structure 2 .
- the first axle 5 is also positioned opposite the supporting link structure 4 along the first arm 33 and the second arm 34 . This positioning maximizes torque; by using the full length of the working link structure 3 as a lever arm, a person is more easily able to lift the working link structure 3 .
- base link structure 1 can be repositioned through simple sliding (except when a drywall panel is being raise; the weight of the drywall panel effectively anchors the base link structure 1 in place), in some embodiments it is desirable to facilitate easier repositioning of the present invention. In such embodiments, lockable wheels, casters, and vertically adjustable feet could be connected to the base link structure 1 .
- the second axle 6 which allows for rotation of the supporting link structure 4 relative to the working link structure 3 , traverses through the first arm 33 , the second arm 34 , the first stay 41 , and the second stay 42 .
- the second axle 6 is positioned opposite the upright link structure 2 along the first arm 33 and the second arm 34 ; this positioning helps better split the load of the working link structure 3 between the supporting link structure 4 and the upright link structure 2 .
- the second axle 6 is further described as being positioned adjacent to the working link structure 3 along the first stay 41 and the second stay 42 ; by being positioned at an end of the supporting link structure 4 , the second axle 6 allows the full height of the supporting link structure 4 to be used.
- the working link structure 3 comprises an at least one cross brace 35 .
- This at least one cross brace 35 is perpendicularly connected with the first arm 33 and the second arm 34 . Resultantly, the structural integrity of the working link structure 3 is improved. Potentially, more cross brace 35 s could be provided to further increase integrity of the working link structure 3 .
- a stop may be connected adjacent to the end of each arm; the stop would prevent the stays from rotating beyond 90 degrees towards the base link structure 1 and upright link structure 2 , which aids the operator knowing when both sides of the drywall shelf is in full up 90 degree position.
- the components of the base link structure 1 , the upright link structure 2 , and the working link structure 3 are just one example of a possible implementation for the present invention.
- the core concept of the present invention is the use of a four-bar linkage system (via the base link structure 1 , upright link structure 2 , working link structure 3 , and supporting link structure 4 ), other components can be utilized as part of the link structures without deviating from the scope of the present invention.
- the base link structure 1 and the upright link structure 2 could be implemented as planar bodies (e.g. a wooden panel) rather than as legs and pillars.
- the present invention can easily be fabricated from available materials, such as recycled decking boards. Higher end implantations could be constructed from aluminum or other metals.
- the types of fasteners used are variable; in the illustrated embodiment compression nuts and sleeves are used to install the first axle 5 and second axle. However, in a simpler embodiment, simple screws can be used for connection of the axles.
- the effort needed to raise the working link structure 3 is also variable. For example, during prototype testing, it was found that lifting effort ranged from 12 to 22 pounds, with initial required effort being low and increasing as the working link structure 3 is raised to the ceiling. The amount of effort required can vary based on the material and dimensions of the present invention, as these can affect weight of the working link structure 3 .
- While the present invention has been described as a drywall lift, it can be used to raise a variety of building materials. For example, plywood, sheetrock, beams, trims, lighting, heat ducts, fans, and further items can be lifted through rotation of the working link structure 3 .
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Abstract
A four-bar linkage based lift is operable by a single person. The lift is used to raise a drywall panel to a ceiling, allowing the drywall panel to be mounted to the ceiling rafters. The lift includes a base link structure, an upright link structure, a working link structure, and a supporting link structure. The upright link structure is adjacently connected to the base link structure, while a first axle creates a hinged connection between the working link structure and the upright link structure. The working link structure can thus be rotated upwards in order to lift a drywall panel, the drywall panel being supported by a drywall retaining shelf of the working link structure. The supporting link structure, formed of an independent first stay and second stay, can be rotated to an upright position to support the raised working link structure.
Description
- The current application claims a priority to the U.S. Provisional Patent application Ser. No. 62/083,778 filed on Nov. 24, 2014.
- The present invention relates generally to a drywall lift which is based upon a four-bar linkage and is operable by a single person.
- The increased use of drywall in housing means the ability to easily and efficiently install drywall is essential to home contractors. The need is even greater for ceiling installations of drywall, as it is difficult for a single person to install drywall to ceilings. There is a need to improve the existing methods and tools for installing drywall to ceilings.
- One current method of installing drywall sheet to the ceiling employs the use of two men and two cripples. A cripple is a T-shaped brace constructed commonly of two 2″×4″ boards; usually the boards are about 2 & 8 feet long respectively. The two men carry the drywall sheet, holding it by its edges. Then the two men rotate the sheet up over their heads. First one man uses one hand to grab a cripple and place the cripple under the sheet. Then the second man does the same, and then the sheet is lifted to the ceiling. The cripples are wedged between the floor and ceiling to hold the sheet in place. Next drywall screws are used to attach the sheet to the ceiling rafters. This method works, but is not without its drawbacks. For one, a light-weight panel of drywall (4′×8′×½″ thick) weighs 40 pounds. This is a cumbersome weight even for a two man team, let alone an individual worker: it is nearly impossible for a single person to install a panel of drywall to a ceiling without help.
- To assist individual workers with drywall installation, there are a number of drywall lifts available. An example of a common drywall lift is one that works on the same principle of a single telescoping tube center assemble. The tube is mounted to a tripod base. A rack, which holds the drywall sheet, is connected to the top of the tube assembly by a hinge. A hand-operated crank, connected to a cable, pulley, and hoist, allows the tube to be moved up and down. This is similar to a boat hoist. These devices are desirable for a number of reasons: they are operable by a single person, work well, and have been adopted by numerous commercial contractors. However, there remains room for improvement. They are somewhat complex, expensive, heavy, and require a large amount of effort is required to rise the drywall ceiling. Furthermore, they are slow; even though they only require a single operator, it takes a lot of turns on the wheel to raise a drywall sheet to the ceiling which slows down the installation process. The present invention seeks to address the shortcoming of current drywall installation methods by providing an apparatus which is easily operated by a single person. In addition to being able to be individually operated, the present invention functions well, and is used by commercial contractors, and some professional installers. However, the exiting lifts are somewhat complex, expensive, heavy, and slow in lifting.
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FIG. 1 is a perspective view of the present invention in a lifted position, wherein the working link structure is perpendicular to the upright link structure. -
FIG. 2 is a side view showing the present invention in the lifted position. -
FIG. 3 is a perspective view of the present invention in a folded position. -
FIG. 4 is a side view showing the present invention in the folded position. - All illustrations of the drawings are for the purpose of describing selected versions of the present invention and are not intended to limit the scope of the present invention.
- The present invention is a drywall lift that is operable by a single person. The present invention is designed for quick and easy assembly and disassembly with industry standard fasteners and tools. Additionally, the present invention can be easily handled, assembled, disassembled, and moved by a single non-professional person. The present invention is also projected to be ⅓ of weight and cost of any other existing apparatus that uses to lift drywalls. These said advantages allow the present invention to be an efficient apparatus for home improvement projects that are related to drywall lifting and fills the need for a do-it-self drywall lifting. The present invention is implemented as a mechanical linkage, specifically a modified four-bar linkage, and as such comprises a
base link structure 1, anupright link structure 2, aworking link structure 3, and a supportinglink structure 4. Thebase link structure 1 and theupright link structure 2 act as fixed links in the present invention, supporting hinged movement of both the workinglink structure 3 and the supportinglink structure 4. These combine into a linkage system with two pivots and one sliding connection. A first pivot is fixed to theupright link structure 2, while a second pivot moves in an arc relative to the first pivot. A sliding connection is between a floor and the bottom of the supportinglink structure 4, which drags across the floor during operation of the present invention. These core components of the present invention are subsequently elaborated upon. Illustrations of the present invention are provided viaFIG. 1 -FIG. 4 . - The
base link structure 1 lies flat against a planar surface, e.g. a floor. Theupright link structure 2 is connected atop thebase link structure 1; these two structures serve as a fixed frame of the present invention. Theupright link structure 2, being vertical, is oriented to be perpendicular to thebase link structure 1. The workinglink structure 3 comprises a drywall retainingshelf 31, which allows a drywall panel to independently supported and manipulated (e.g. raised towards a ceiling for connection via ceiling rafters) by the present invention. The workinglink structure 3 is hingedly connected to theupright link structure 2 through afirst axle 5. As a result, the workinglink structure 3 can be rotated about a fixed end, i.e. the end that is hinged to theupright link structure 2 by saidfirst axle 5. Similarly, the supportinglink structure 4 is hingedly connected to the workinglink structure 3 through a second axle 6. This allows the supportinglink structure 4 to be rotated with respect to the workinglink structure 3. This is important as the supportinglink structure 4 can be used to support and secure the workinglink structure 3 at a non-equilibrium angle. In reference toFIG. 3 andFIG. 4 , when a drywall panel is loaded to the workinglink structure 3, the present invention is in the folded position as the supportinglink structure 4 can be either forward or rearward facing. When the workinglink structure 3 is used to raise a drywall panel to a ceiling. It is noted that the supportinglink structure 4 can support the workinglink structure 3 at multiple angles; for example, the supportinglink structure 4 can be positioned at a 45 degree angle relative to the workinglink structure 3 and a floor, rather than a 90 degree angle (which would hold theworking link structure 3 parallel to a ceiling). As the supportinglink structure 4 drags along the floor during rotation of the workinglink structure 3, it creates leverage and reduces the amount of effort required to be input by a user. The basic operation of the present invention is shown inFIG. 1 andFIG. 3 , which illustrate how the components of the present invention relate with respect to one another. - In order to further stabilize the structure of the present invention, a first buttress 7 and a second buttress 8 can be installed as part of the present invention. The
first buttress 7 and second buttress 8 serve as braces between thebase link structure 1 and theupright link structure 2, helping to provide improved stabilization for the present invention. Thefirst buttress 7 and the second buttress 8 are positioned opposite each other across thebase link structure 1 and theupright link structure 2. Effectively, the two buttresses are respectively positioned at the left side and the right side of the present invention. Each buttress is positioned at an angle relative to thebase link structure 1 and theupright link structure 2; the first buttress 7 and second buttress 8 are both angularly connected between thebase link structure 1 and theupright link structure 2, albeit at opposite sides. In short, from a side profile view, the buttresses form a triangular shape in combination with thebase link structure 1 and theupright link structure 2. The buttresses can be seen inFIG. 1 -FIG. 4 . - The
first stay 41 and thesecond stay 42, being used to support the workinglink structure 3, are each hingedly connected with the link structure by means of the second axle 6. Resultantly, thefirst stay 41 and thesecond stay 42 can be rotated relative to the workinglink structure 3. As thefirst stay 41 and thesecond stay 42 are meant to support the load of the workinglink structure 3, they are positioned at opposite sides of the present invention. Resultantly, thefirst stay 41 is positioned adjacent with the first buttress 7 while thesecond stay 42 is positioned adjacent with the second buttress 8. Each stay effectively remains coplanar with its corresponding buttress; this holds true when resting on a floor at an angle (i.e. when a drywall panel is being loaded onto thedrywall retaining shelf 31 and when angled to an upright position (i.e. when a drywall panel is being fastened to a ceiling). It is noted that thefirst stay 41 and thesecond stay 42 can be rotated about the second axle 6 independently from each other; this improves safety of the present invention. Even if one of the stays is knocked away or otherwise fails, the other stay remains in place and support the drywall panel and workinglink structure 3 from falling, resulting in improved workplace safety. - The
drywall retaining shelf 31, which receives a drywall panel and secures said drywall panel during rotation towards a ceiling. Thus, thedrywall retaining shelf 31 is adjacently positioned with atop surface 32 of the workinglink structure 3. Furthermore, thedrywall retaining shelf 31 is centrally connected to the workinglink structure 3; this central positioning means that a larger portion of the workinglink structure 3 will be available to bear the weight of the panel of drywall. - As the present invention is provided for the installation of drywall, and because ceiling heights vary, it is desirable to provide a means of height-adjustment for the present invention. In support of this, the
upright link structure 2, thefirst stay 41, and thesecond stay 42 each comprise a fixedmember 91, anextension member 92, and alocking mechanism 93. Theextension member 92 is slidably engaged with the fixedmember 91, effectively allowing theextension member 92 to be raised or lowered in relation to the fixedmember 91. This allows an operator of the present invention to adjust theextension member 92 to a desired height. Thelocking mechanism 93 is mounted to the fixedmember 91 and selectively engaged with theextension member 92; engagement of thelocking mechanism 93 and theextension member 92 prevents movement of theextension member 92. Disengaging thelocking mechanism 93 from theextension member 92 allows movement of theextension member 92. Thelocking mechanism 93 can be reengaged with theextension member 92 once theextension member 92 has been set to the desired height. - A variety of components can be implemented as part of the
locking mechanism 93. In the illustrated embodiment, thelocking mechanism 93 is preferably a spring-loaded latch. The spring-loaded latch is engaged with theextension member 92 through a plurality of latch receptacles, the plurality of latch receptacles being positioned along theextension member 92. A locking shaft of the spring-loaded latch is pressed against theextension member 92; when the locking shaft is aligned with one of the plurality of latch receptacles, the locking shaft traverses into the latch receptacle. Thus, when the locking shaft is engaged with an arbitrary latch receptacle from the plurality of latch receptacles, movement of theextension member 92 relative to the fixedmember 91 is prevented. These are shown inFIG. 1 andFIG. 3 . - In other embodiments, as mentioned, different implementations of the
locking mechanism 93 can be utilized. For example, in one embodiment thelocking mechanism 93 is a clamp; by engaging the clamp pressure is applied to fixedmember 91 and theextension member 92. The resulting frictional forces prevent movement of theextension member 92. In another example, thelocking mechanism 93 is a screw lock. The screw lock, similar to the clutch lock, applies pressure to theextension member 92 and the fixedmember 91 In order to prevent movement. Unscrewing the screw lock releases pressure and allows movement of theextension member 92 to a desired height. In another example, thelocking mechanism 93 is a twist-lock similar to a painter's extension pole so that theextensions member 92 is able to move into a desired height in relation to the fixedmember 91. This, along with the previous examples, is one of a few possible implementations for thelocking mechanism 93 and doesn't not preclude the use of alternative implementations. Components related to the height-adjustable nature are shown throughFIG. 1 -FIG. 4 providing an example of a height adjustment made through the present invention. - Just as different implementations are possible for the
locking mechanism 93, variations in engagement between the fixedmember 91 and theextension member 92 are possible. In the illustrated embodiment theextension member 92 is shown as being adjacently engaged with the fixedmember 91. That is, the fixedmember 91 serves as a track for theextension member 92. Resultantly, theextension member 92 can slide along the track of the fixedmember 91 in order to adjust the height of the present invention. In another embodiment, theextension member 92 traverses into the fixedmember 91, resulting in a telescoping connection between theextension member 92 and the fixedmember 91. The use of different sliding engagements opens up further possibilities for lockingmechanisms 93, such as a twist lock for the telescoping engagement. These two examples shown potential means by which theextension member 92 may be slidably engaged with the fixedmember 91; other methods remain possible within the scope of the present invention. - The present invention, as thus far described, serves as a mobile apparatus which allows for a drywall panel to be raised to an elevated height by a single person. In a default position, the working
link structure 3 rests against the first buttress 7 and the second buttress 8. The supportinglink structure 4, i.e. thefirst stay 41 and thesecond stay 42, are rotated such that they are parallel with the workinglink structure 3. This provides better access to the workinglink structure 3 for a user of the present invention. In the described position, the present invention is similar to an easel, allowing a drywall panel to easily be loaded onto the workinglink structure 3 anddrywall retaining shelf 31. Once the drywall panel has been loaded, the workinglink structure 3 can be rotated away from theupright link structure 2 and towards a ceiling as the bottom of supportinglink structure 4 slides across the floor and pushes the workinglink structure 3 and the drywall up to the ceiling. Once the drywall panel has been raised to the ceiling, the supportinglink structure 4 is perpendicularly positioned with the floor into an upright position. The supporting link structure's 4first stay 41 andsecond stay 42 can be independently, rotated, allowing a user to hold the workinglink structure 3 up with one hand while rotating thefirst stay 41 with their other hand. After rotating thefirst stay 41 to an upright position, a user can then rotate thesecond stay 42 to an upright position to further stabilize the present invention; with both stays rotated to an upright position, theupright link structure 2,first stay 41, andsecond stay 42 provide multiple load-bearing sections that are able to hold the workinglink structure 3 and drywall panel in a raised position. This effectively converts the present invention from a “floor-easel” configuration, i.e. prior to lifting of the drywall panel, to a “support-table” configuration, i.e. when the drywall panel is raised to the ceiling. - With the drywall panel being supported by a present invention, a user has both hands free. The panel can thus be mounted to the ceiling by a single person. This is an improvement over other tools, such as the T-shaped brace known as a “cripple”, which require two persons for drywall installation. Thanks to the height-adjustable nature of the present invention, by means of the
first extension member 92 andsecond extension member 92, the present invention can be adapted for use with ceilings of different height. By moving theextension member 92 of thefirst stay 41,second stay 42, andupright link structure 2, the total height of the present invention can be increased or decreased. This increases flexibility of the present invention, as it is not limited to ceilings of a specific height. - In the illustrated embodiment, the
base link structure 1, theupright link structure 2, and the workinglink structure 3 each comprise a number of frame pieces. More specifically, thebase link structure 1 comprises afirst leg 11 and asecond leg 12. Theupright link structure 2 comprises afirst pillar 21 and asecond pillar 22. The working link, comprises afirst arm 33 and asecond arm 34. These components effectively serve as a left side and a right side of the present invention, somewhat similar to the first buttress 7 and the second buttress 8. On one side, thefirst pillar 21 is connected perpendicular to thefirst leg 11. On the other side, thesecond pillar 22 is connected perpendicular to thesecond leg 12. Thedrywall retaining shelf 31, which helps secure and bear the load of the panel of drywall, is connected across thefirst arm 33 and thesecond arm 34. - The
first arm 33 and thesecond arm 34 are rotatable with respect to the correspondingfirst pillar 21 andsecond pillar 22. This coupling is enabled by thefirst axle 5, which traverses through thefirst pillar 21, thesecond pillar 22, thefirst arm 33, and thesecond arm 34. Thefirst axle 5 is positioned opposite the base structure along thefirst pillar 21 and thesecond pillar 22, allowing the workinglink structure 3 to be rotated to the same height as theupright link structure 2. Thefirst axle 5 is also positioned opposite the supportinglink structure 4 along thefirst arm 33 and thesecond arm 34. This positioning maximizes torque; by using the full length of the workinglink structure 3 as a lever arm, a person is more easily able to lift the workinglink structure 3. - While the
base link structure 1 can be repositioned through simple sliding (except when a drywall panel is being raise; the weight of the drywall panel effectively anchors thebase link structure 1 in place), in some embodiments it is desirable to facilitate easier repositioning of the present invention. In such embodiments, lockable wheels, casters, and vertically adjustable feet could be connected to thebase link structure 1. - The second axle 6, which allows for rotation of the supporting
link structure 4 relative to the workinglink structure 3, traverses through thefirst arm 33, thesecond arm 34, thefirst stay 41, and thesecond stay 42. The second axle 6 is positioned opposite theupright link structure 2 along thefirst arm 33 and thesecond arm 34; this positioning helps better split the load of the workinglink structure 3 between the supportinglink structure 4 and theupright link structure 2. The second axle 6 is further described as being positioned adjacent to the workinglink structure 3 along thefirst stay 41 and thesecond stay 42; by being positioned at an end of the supportinglink structure 4, the second axle 6 allows the full height of the supportinglink structure 4 to be used. - In order to better help bear the load of a panel of drywall, the working
link structure 3 comprises an at least onecross brace 35. This at least onecross brace 35 is perpendicularly connected with thefirst arm 33 and thesecond arm 34. Resultantly, the structural integrity of the workinglink structure 3 is improved. Potentially, more cross brace 35s could be provided to further increase integrity of the workinglink structure 3. Furthermore, to help prevent over-rotation of thefirst stay 41 and thesecond stay 42, a stop may be connected adjacent to the end of each arm; the stop would prevent the stays from rotating beyond 90 degrees towards thebase link structure 1 andupright link structure 2, which aids the operator knowing when both sides of the drywall shelf is in full up 90 degree position. - The components of the
base link structure 1, theupright link structure 2, and the workinglink structure 3, as formerly described, are just one example of a possible implementation for the present invention. As the core concept of the present invention is the use of a four-bar linkage system (via thebase link structure 1,upright link structure 2, workinglink structure 3, and supporting link structure 4), other components can be utilized as part of the link structures without deviating from the scope of the present invention. For example, thebase link structure 1 and theupright link structure 2 could be implemented as planar bodies (e.g. a wooden panel) rather than as legs and pillars. - Specific materials and dimensions of the present invention are not restricted; the present invention can easily be fabricated from available materials, such as recycled decking boards. Higher end implantations could be constructed from aluminum or other metals. Likewise, the types of fasteners used are variable; in the illustrated embodiment compression nuts and sleeves are used to install the
first axle 5 and second axle. However, in a simpler embodiment, simple screws can be used for connection of the axles. The effort needed to raise the workinglink structure 3 is also variable. For example, during prototype testing, it was found that lifting effort ranged from 12 to 22 pounds, with initial required effort being low and increasing as the workinglink structure 3 is raised to the ceiling. The amount of effort required can vary based on the material and dimensions of the present invention, as these can affect weight of the workinglink structure 3. - While the present invention has been described as a drywall lift, it can be used to raise a variety of building materials. For example, plywood, sheetrock, beams, trims, lighting, heat ducts, fans, and further items can be lifted through rotation of the working
link structure 3. - Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
Claims (15)
1. A drywall lift comprises:
a base link structure;
an upright link structure;
a working link structure;
a supporting link structure;
the working link structure comprises a drywall retaining shelf;
the supporting link structure comprises a first stay and a second stay;
the upright link structure being adjacently and perpendicularly connected to the base link structure;
the working link structure being hingedly connected to the upright link structure through a first axle;
the working link structure being oppositely positioned from the base line structure across the upright link structure;
the supporting link structure being hingedly connected to the working link structure through a second axle; and
the supporting link structure being oppositely positioned from the upright link structure across the working link structure.
2. The drywall lift as claimed in claim 1 comprises:
a first buttress and a second buttress;
the first buttress and the second buttress being oppositely positioned of each other across the base link structure and the upright link structure;
the first buttress being angularly connected between the base link structure and the upright link structure;
the second buttress being angularly connected between the base link structure and the upright link structure;
the first stay being hingedly connected with the working link structure;
the first stay being adjacently positioned with the first buttress;
the second stay being hingedly connected with the working link structure; and
the second stay being adjacently positioned with the second buttress.
3. The drywall lift as claimed in claim 1 comprises:
the drywall retaining shelf being adjacently positioned with a top surface of the working link structure; and
the drywall retaining shelf being centrally connected with the working link structure.
4. The drywall lift as claimed in claim 1 comprises:
the upright link structure, the first stay, and the second stay each comprise a fixed member, an extension member, and a locking mechanism;
the extension member being slidably engaged with the fixed member;
the locking mechanism being mounted to the fixed member; and
the locking mechanism being selectively engaged with the extension member.
5. The drywall lift as claimed in claim 1 comprises:
the base link structure comprises a first leg and a second leg;
the upright link structure comprises a first pillar and a second pillar;
the working link structure comprises a first arm and a second arm;
the first pillar being connected perpendicular to the first leg;
the second pillar being connected perpendicular to the second leg; and
the drywall retaining shelf being connected across the first arm and the second arm.
6. The drywall lift as claimed in claim 5 comprises:
the first axle traversing through the first pillar, the second pillar, the first arm, and the second arm;
the first axle being positioned opposite the base link structure along the first pillar and the second pillar; and
the first axle being positioned opposite the supporting link structure along the first arm and the second arm.
7. The drywall lift as claimed in claim 5 comprises:
the second axle traversing through the first arm, the second arm, the first stay, and the second stay;
the second axle being positioned opposite the upright link structure along the first arm and the second arm; and
the second axle being positioned adjacent to the working link structure along the first stay and the second stay.
8. The drywall lift as claimed in claim 5 comprises:
the working link structure further comprises an at least one cross brace; and
the at least one cross brace being perpendicularly connected with the first arm and the second arm.
9. A drywall lift comprises:
a base link structure;
an upright link structure;
a working link structure;
a supporting link structure;
the working link structure comprises a drywall retaining shelf;
the supporting link structure comprises a first stay and a second stay;
a first buttress and a second buttress;
the upright link structure, the first stay, and the second stay each comprise a fixed member, an extension member, and a locking mechanism;
the base link structure comprises a first leg and a second leg;
the upright link structure comprises a first pillar and a second pillar;
the working link structure comprises a first arm and a second arm;
the upright link structure being adjacently and perpendicularly connected to the base link structure;
the working link structure being hingedly connected to the upright link structure through a first axle;
the working link structure being oppositely positioned from the base line structure across the upright link structure;
the supporting link structure being hingedly connected to the working link structure through a second axle;
the supporting link structure being oppositely positioned from the upright link structure across the working link structure;
the first buttress and the second buttress being oppositely positioned of each other across the base link structure and the upright link structure;
the extension member being slidably engaged with the fixed member;
the locking mechanism being mounted to the fixed member; and
the locking mechanism being selectively engaged with the extension member.
10. The drywall lift as claimed in claim 9 comprises:
the first buttress being angularly connected between the base link structure and the upright link structure;
the second buttress being angularly connected between the base link structure and the upright link structure;
the first stay being hingedly connected with the working link structure;
the first stay being adjacently positioned with the first buttress;
the second stay being hingedly connected with the working link structure; and
the second stay being adjacently positioned with the second buttress.
11. The drywall lift as claimed in claim 9 comprises:
the drywall retaining shelf being adjacently positioned with a top surface of the working link structure; and
the drywall retaining shelf being centrally connected with the working link structure.
12. The drywall lift as claimed in claim 9 comprises:
the first pillar being connected perpendicular to the first leg;
the second pillar being connected perpendicular to the second leg; and
the drywall retaining shelf being connected across the first arm and the second arm.
13. The drywall lift as claimed in claim 9 comprises:
the first axle traversing through the first pillar, the second pillar, the first arm, and the second arm;
the first axle being positioned opposite the base link structure along the first pillar and the second pillar; and
the first axle being positioned opposite the supporting link structure along the first arm and the second arm.
14. The drywall lift as claimed in claim 9 comprises:
the second axle traversing through the first arm, the second arm, the first stay, and the second stay;
the second axle being positioned opposite the upright link structure along the first arm and the second arm; and
the second axle being positioned adjacent to the working link structure along the first stay and the second stay.
15. The drywall lift as claimed in claim 9 comprises:
the working link structure further comprises an at least one cross brace; and
the at least one cross brace being perpendicularly connected with the first arm and the second arm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/947,589 US20160145879A1 (en) | 2014-11-24 | 2015-11-20 | Drywall Lift |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201462083778P | 2014-11-24 | 2014-11-24 | |
US14/947,589 US20160145879A1 (en) | 2014-11-24 | 2015-11-20 | Drywall Lift |
Publications (1)
Publication Number | Publication Date |
---|---|
US20160145879A1 true US20160145879A1 (en) | 2016-05-26 |
Family
ID=56009654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/947,589 Abandoned US20160145879A1 (en) | 2014-11-24 | 2015-11-20 | Drywall Lift |
Country Status (1)
Country | Link |
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US (1) | US20160145879A1 (en) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB961350A (en) * | 1961-02-14 | 1964-06-17 | Andrew Gordon Cook | Improvements in or relating to staging for the erection of ceiling panels |
DE2459444A1 (en) * | 1974-04-30 | 1975-11-20 | Papsco Inc | ASSEMBLY TROLLEY FOR THE ARRANGEMENT OF SECTIONS OF A MODULAR WALL SYSTEM |
DE3732118A1 (en) * | 1987-09-24 | 1989-04-06 | Klaus Burkhardt | Lifting device for boards or the like |
WO1991019065A1 (en) * | 1990-06-05 | 1991-12-12 | Charléz, Rune | Handling device |
GB2294494A (en) * | 1994-10-26 | 1996-05-01 | Keith James Niehorster | Plasterboard lifting device |
DE29615058U1 (en) * | 1996-08-30 | 1998-01-08 | Hilgarth Guenter | Device for mounting ceiling panels |
US20060062655A1 (en) * | 2004-09-17 | 2006-03-23 | Harrelson Ronald E | Panel lifting and positioning device |
FR2883590A1 (en) * | 2005-03-25 | 2006-09-29 | Abdellah Yadouch | Light or heavy weight plaster or wooden board installation folding apparatus for ceiling, has jack stand shape bar with adjustable extension bar, and bar whose length is lower than that of jack stand shape bar |
US20080008561A1 (en) * | 2004-06-07 | 2008-01-10 | Hontz Carl O Jr | Self-adjusting drywall crane |
US8317454B1 (en) * | 2009-11-18 | 2012-11-27 | Parker Walter B | Stone handling frame |
US20150089886A1 (en) * | 2013-09-27 | 2015-04-02 | David E. Kurtz | Method and apparatus for hanging sheeting material |
-
2015
- 2015-11-20 US US14/947,589 patent/US20160145879A1/en not_active Abandoned
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB961350A (en) * | 1961-02-14 | 1964-06-17 | Andrew Gordon Cook | Improvements in or relating to staging for the erection of ceiling panels |
DE2459444A1 (en) * | 1974-04-30 | 1975-11-20 | Papsco Inc | ASSEMBLY TROLLEY FOR THE ARRANGEMENT OF SECTIONS OF A MODULAR WALL SYSTEM |
DE3732118A1 (en) * | 1987-09-24 | 1989-04-06 | Klaus Burkhardt | Lifting device for boards or the like |
WO1991019065A1 (en) * | 1990-06-05 | 1991-12-12 | Charléz, Rune | Handling device |
GB2294494A (en) * | 1994-10-26 | 1996-05-01 | Keith James Niehorster | Plasterboard lifting device |
DE29615058U1 (en) * | 1996-08-30 | 1998-01-08 | Hilgarth Guenter | Device for mounting ceiling panels |
WO1998009039A1 (en) * | 1996-08-30 | 1998-03-05 | Gammah Werkzeuge Gmbh | Device for mounting ceiling panels |
US20080008561A1 (en) * | 2004-06-07 | 2008-01-10 | Hontz Carl O Jr | Self-adjusting drywall crane |
US20060062655A1 (en) * | 2004-09-17 | 2006-03-23 | Harrelson Ronald E | Panel lifting and positioning device |
FR2883590A1 (en) * | 2005-03-25 | 2006-09-29 | Abdellah Yadouch | Light or heavy weight plaster or wooden board installation folding apparatus for ceiling, has jack stand shape bar with adjustable extension bar, and bar whose length is lower than that of jack stand shape bar |
US8317454B1 (en) * | 2009-11-18 | 2012-11-27 | Parker Walter B | Stone handling frame |
US20150089886A1 (en) * | 2013-09-27 | 2015-04-02 | David E. Kurtz | Method and apparatus for hanging sheeting material |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |