US20080008561A1 - Self-adjusting drywall crane - Google Patents
Self-adjusting drywall crane Download PDFInfo
- Publication number
- US20080008561A1 US20080008561A1 US11/143,466 US14346605A US2008008561A1 US 20080008561 A1 US20080008561 A1 US 20080008561A1 US 14346605 A US14346605 A US 14346605A US 2008008561 A1 US2008008561 A1 US 2008008561A1
- Authority
- US
- United States
- Prior art keywords
- drywall
- cradle
- boom
- self
- scissor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- BTCSSZJGUNDROE-UHFFFAOYSA-N gamma-aminobutyric acid Chemical compound NCCCC(O)=O BTCSSZJGUNDROE-UHFFFAOYSA-N 0.000 description 1
- PWPJGUXAGUPAHP-UHFFFAOYSA-N lufenuron Chemical compound C1=C(Cl)C(OC(F)(F)C(C(F)(F)F)F)=CC(Cl)=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F PWPJGUXAGUPAHP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- This invention relates to drywall lifting devices, specifically to an improved craning mechanism and self-adjusting platform.
- U.S. Pat. No. 6,010,299 issued on Jan. 4, 2000 to Ronald Jesswein discloses a Lifting and Positioning Device (Prior Art FIG. 1 ) that has a large number of parts and utilizes an indexing arrangement for positioning the drywall platform. It appears to be heavy and cumbersome, utilizing a floor jack that alone can weigh approximately 65 pounds. A common floor jack also routinely displays cautions on their labels to ‘not get under the object or load being lifted.’
- U.S. Pat. No. 6,244,810 B1 issued on Jun. 12, 2001 to Guadalupe Reyes discloses a Drywall Handyman (Prior Art FIG. 3 ), which utilizes a friction brake. If a panel should need to be lowered, pressure must me applied to a brake handle. Since there is no racheting system to gently lower the panel, the platform and drywall are subject to freefall. I have spoken to many drywall handlers who do not trust these devices.
- FIG. 1 shows the drywall crane platform in the maximum lowered position.
- FIG. 2 shows the drywall crane platform in the fully raised position.
- the device consists of a tubular steel tower 1 . which is welded to a tubular base that has 2 sets of wheels attached. Two tubular legs 2 . are inserted into the tubular base. The legs have a third set of wheels attached to the front to stabilize the device and to make it highly maneuverable.
- the lifting device 3 is a scissor-lift, capable of hoisting 6500 pounds. It is bolted to the tower 1 . frame.
- the tubular steel boom assembly 4 . is attached to the top of the lifting device 3 . with a pin.
- the top of the boom assembly 4 . is attached to the top of the tower 1 . with a 5 inch hinge.
- the tubular steel boom 5 . with the attached drywall cradle 7 . is inserted into the boom assembly 4 .
- the drywall cradle 7 . is a balanced, pivoting platform, which has been pinned to the base of the boom 5 .
- a tension spring 6 . is hooked to the drywall cradle 7 . and to the boom 5 . to hold the drywall cradle 7 . at an approximate 40 degree angle.
- the lifting device 3 is activated by a hand-crank to the desired height.
- the lifting device 3 will act upon the boom assembly 4 . to raise or lower the drywall cradle 7 .
- the drywall cradle 7 touches the wall or ceiling to which the drywall is to be secured, the drywall cradle 7 . will automatically pivot and level itself off to the pitch of the wall or ceiling.
- the entire device can then be rolled to facilitate closer placement, within 2 inches of the nailing position. You can also safely work beneath the entire 8 or 10 foot drywall sheet, since there is no center post to impede maneuverability as in other drywall lifts.
- the boom 5 can be lowered safely by reverse cranking the lifting device. 3 .
- the device can be disassembled in seconds and broken down into 4 parts: The base containing the tower 1 . and scissor-lift, the two (2) stabilizing legs 2 , and the boom 5 . containing the drywall cradle. 7 . The largest part of the disassembled device will fit through a 20 inch doorway.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
Abstract
A device for positioning drywall at any angle to a 12 ft height. Comprised of a cradle (7) on which drywall is loaded, the cradle (7) floats and rotates, utilizing the self-adjusting head. The cradle is pinned to a boom (5). The boom (5) is pinned to the boom assembly (4), which is hinged to the tower (1). A scissor-jack (3) is bolted to the tower (1). The scissor-jack (3) is manually cranked, acting upon the boom assembly (4), raising or lowering it. The cradle (7) will maintain nearly the same angle from loading to highest position. Drywall is held secure by lugs. When the drywall touches the surface, the rotating head will automatically adjust the cradle (7) to the wall or ceiling angle. The cradle (7) design allows for safely working beneath the entire sheet. The stability of the device allows for maximum maneuverability. Cradle (7), boom (5) and legs (2) can be detached for ease of disassembling and transport. A single person can install drywall.
Description
- This application claims the benefit of PPA Appl. No. 60/577,041 filed Jun. 07, 2004, by the present inventor.
- Not Applicable
- Not Applicable
- This invention relates to drywall lifting devices, specifically to an improved craning mechanism and self-adjusting platform.
- In the process of building a new home by myself, I was in need of a drywall lift that could be used for 11 feet high walls and ceilings. The standard lifts currently on the market would only reach 10 feet. The model designed to reach 14 feet required the drywall to be lifted 7 feet to place on the platform, which is difficult even for two people. I needed something that I could maneuver easily myself, that would reach the desired heights and that was inexpensive to make. Safety was foremost in my mind, a factor I found lacking in the current market devices. My 30 years of experience as a crane operator helped me to realize this goal.
- U.S. Pat. No. 6,010,299 issued on Jan. 4, 2000 to Ronald Jesswein discloses a Lifting and Positioning Device (Prior Art
FIG. 1 ) that has a large number of parts and utilizes an indexing arrangement for positioning the drywall platform. It appears to be heavy and cumbersome, utilizing a floor jack that alone can weigh approximately 65 pounds. A common floor jack also routinely displays cautions on their labels to ‘not get under the object or load being lifted.’ - U.S. Pat. No. 6,244,810 B1 issued on Jun. 12, 2001 to Guadalupe Reyes discloses a Drywall Handyman (Prior Art
FIG. 3 ), which utilizes a friction brake. If a panel should need to be lowered, pressure must me applied to a brake handle. Since there is no racheting system to gently lower the panel, the platform and drywall are subject to freefall. I have spoken to many drywall handlers who do not trust these devices. - Accordingly, several advantages of my invention are:
-
- (a) A device that has only 7 parts
- (b) A device that is lightweight, tubular steel, used in building lightweight, strong, load-bearing scaffolding. The total weight is approximately 74 pounds.
- (c) A device that can be completely assembled in one (1) minute and disassembled in 30 seconds.
- (d) A device that uniquely utilizes a scissor-lift device (
FIG. 1 ), which is manufacture-rated at a maximum lift capacity of 6500 pounds and can also be used as a stabilizing device to hold up to 6500 pounds when not raising or lowering the drywall. - (e) A device that is easily maneuverable when empty or when loaded with drywall and with the platform in any position. It can be easily pushed or pulled over rough surfaces or wires and cables.
- (f) A device which allows the drywall to be lifted only approximately 20 inches to place on the platform. The platform can be raised to a more comfortable height for a taller person.
- (g) A device which holds the drywall securely in place, but allows for maximum maneuverability of the drywall sheet into the desired position within 2 inches.
- (h) A device which lifts and holds a sheet of drywall or lowers the drywall, if necessary, safely and without fear of freefall. It provides a safe environment, even when standing under the platform and drywall.
- (i) A device that can lift both 8 feet and 12 feet panels and can install panels on a 12 feet high wall or ceiling.
- (j) A device that embodies a floating, self-adjusting head, which allows for installation of a panel on walls or ceilings at any angle and with no adjustments necessary to any part of the device.
- (k) A device that can be loaded, operated and allows for installation of a drywall panel by a single person.
- This is a drywall lifting crane that enables a single person to apply drywall to higher ceilings and walls, as found in most currently built homes. It is easily maneuverable and safe to operate.
-
FIG. 1 shows the drywall crane platform in the maximum lowered position. -
FIG. 2 shows the drywall crane platform in the fully raised position. - The device consists of a
tubular steel tower 1. which is welded to a tubular base that has 2 sets of wheels attached. Twotubular legs 2. are inserted into the tubular base. The legs have a third set of wheels attached to the front to stabilize the device and to make it highly maneuverable. - The
lifting device 3. is a scissor-lift, capable of hoisting 6500 pounds. It is bolted to thetower 1. frame. The tubularsteel boom assembly 4. is attached to the top of thelifting device 3. with a pin. The top of theboom assembly 4. is attached to the top of thetower 1. with a 5 inch hinge. - The
tubular steel boom 5. with the attacheddrywall cradle 7. is inserted into theboom assembly 4. Thedrywall cradle 7. is a balanced, pivoting platform, which has been pinned to the base of theboom 5. Atension spring 6. is hooked to thedrywall cradle 7. and to theboom 5. to hold thedrywall cradle 7. at an approximate 40 degree angle. - You need to lift a sheet of drywall approximately 20 inches to place on the
cradle 7. lugs, which keep the sheet securely against thedrywall cradle 7. - The
lifting device 3. is activated by a hand-crank to the desired height. Thelifting device 3. will act upon theboom assembly 4. to raise or lower thedrywall cradle 7. - When the
drywall cradle 7. touches the wall or ceiling to which the drywall is to be secured, thedrywall cradle 7. will automatically pivot and level itself off to the pitch of the wall or ceiling. - The entire device can then be rolled to facilitate closer placement, within 2 inches of the nailing position. You can also safely work beneath the entire 8 or 10 foot drywall sheet, since there is no center post to impede maneuverability as in other drywall lifts.
- The
boom 5. can be lowered safely by reverse cranking the lifting device. 3. - The device can be disassembled in seconds and broken down into 4 parts: The base containing the
tower 1. and scissor-lift, the two (2) stabilizinglegs 2, and theboom 5. containing the drywall cradle. 7. The largest part of the disassembled device will fit through a 20 inch doorway. - From the description above, it is evident that the process of hanging a sheet of drywall can be done by a single person, with ease of assembly and ease of maneuvering. Above all, this device embodies a high level of stability which enables this process to be done safely.
Claims (1)
1. A self-adjusting drywall lifting device comprising:
a) a detachable, rotating, self-adjusting cradle on which to place a sheet of drywall,
b) a detachable boom for supporting and positioning said drywall cradle,
c) a scissor-jack lifting device for raising or lowering said boom,
d) a tower, which houses said scissor-jack, and
e) a detachable legs assembly having rotatable wheels thereunder, for enabling the drywall lifting device to be rolled to the desired location,
whereby a sheet of drywall can be attached to a wall or ceiling at any angle to a height of twelve (12) feet by means of said self-adjusting cradle and whereby the process can be safely done by a single person.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/143,466 US20080008561A1 (en) | 2004-06-07 | 2005-08-17 | Self-adjusting drywall crane |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57704104P | 2004-06-07 | 2004-06-07 | |
US11/143,466 US20080008561A1 (en) | 2004-06-07 | 2005-08-17 | Self-adjusting drywall crane |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080008561A1 true US20080008561A1 (en) | 2008-01-10 |
Family
ID=38919282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/143,466 Abandoned US20080008561A1 (en) | 2004-06-07 | 2005-08-17 | Self-adjusting drywall crane |
Country Status (1)
Country | Link |
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US (1) | US20080008561A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130167471A1 (en) * | 2012-01-03 | 2013-07-04 | Douglas A. Denaro | Adjustable lift table |
WO2014064033A1 (en) * | 2012-10-22 | 2014-05-01 | Bohle Ag | Handling device for handling flat articles |
US20160145879A1 (en) * | 2014-11-24 | 2016-05-26 | Patrick M. Glance | Drywall Lift |
US20170088155A1 (en) * | 2015-09-29 | 2017-03-30 | Antonio Silva | Board handling apparatus |
US9758974B1 (en) * | 2016-06-09 | 2017-09-12 | Dewell Reeves | Sheetrock lifting device |
US9909325B2 (en) * | 2014-11-06 | 2018-03-06 | Etablissements Pierre Grehal Et Cie Sa | Mechanism for fastening in a swivelling manner a plate carrier to a telescopic mast of a plate-lifting apparatus, and plate-lifting apparatus equipped with this mechanism |
US10465400B1 (en) * | 2018-11-06 | 2019-11-05 | Lorenzo Stephens | Drywall sheet lifting device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2815132A (en) * | 1956-05-14 | 1957-12-03 | Stone Ben | Machine for hoisting and positioning building board |
US3822023A (en) * | 1973-07-18 | 1974-07-02 | T Cordel | Pivoting and lifting structure for sheeting building material |
US4150755A (en) * | 1978-01-19 | 1979-04-24 | Hall Albert E | Panel placing device |
US4684314A (en) * | 1984-09-24 | 1987-08-04 | Weatherford/Lamb, Inc. | Pipe handling apparatus |
US5829948A (en) * | 1995-10-26 | 1998-11-03 | Susanne Becklund, Adminstratix | Multipurpose lift apparatus and method |
-
2005
- 2005-08-17 US US11/143,466 patent/US20080008561A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2815132A (en) * | 1956-05-14 | 1957-12-03 | Stone Ben | Machine for hoisting and positioning building board |
US3822023A (en) * | 1973-07-18 | 1974-07-02 | T Cordel | Pivoting and lifting structure for sheeting building material |
US4150755A (en) * | 1978-01-19 | 1979-04-24 | Hall Albert E | Panel placing device |
US4684314A (en) * | 1984-09-24 | 1987-08-04 | Weatherford/Lamb, Inc. | Pipe handling apparatus |
US5829948A (en) * | 1995-10-26 | 1998-11-03 | Susanne Becklund, Adminstratix | Multipurpose lift apparatus and method |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130167471A1 (en) * | 2012-01-03 | 2013-07-04 | Douglas A. Denaro | Adjustable lift table |
WO2014064033A1 (en) * | 2012-10-22 | 2014-05-01 | Bohle Ag | Handling device for handling flat articles |
US9909325B2 (en) * | 2014-11-06 | 2018-03-06 | Etablissements Pierre Grehal Et Cie Sa | Mechanism for fastening in a swivelling manner a plate carrier to a telescopic mast of a plate-lifting apparatus, and plate-lifting apparatus equipped with this mechanism |
US20160145879A1 (en) * | 2014-11-24 | 2016-05-26 | Patrick M. Glance | Drywall Lift |
US20170088155A1 (en) * | 2015-09-29 | 2017-03-30 | Antonio Silva | Board handling apparatus |
US10017199B2 (en) * | 2015-09-29 | 2018-07-10 | Antonio Silva | Board handling apparatus |
US9758974B1 (en) * | 2016-06-09 | 2017-09-12 | Dewell Reeves | Sheetrock lifting device |
US10465400B1 (en) * | 2018-11-06 | 2019-11-05 | Lorenzo Stephens | Drywall sheet lifting device |
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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 |