CA1194047A - Door jack - Google Patents
Door jackInfo
- Publication number
- CA1194047A CA1194047A CA000423041A CA423041A CA1194047A CA 1194047 A CA1194047 A CA 1194047A CA 000423041 A CA000423041 A CA 000423041A CA 423041 A CA423041 A CA 423041A CA 1194047 A CA1194047 A CA 1194047A
- Authority
- CA
- Canada
- Prior art keywords
- clamp member
- door
- clamp
- work piece
- support member
- 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.)
- Expired
Links
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
- E04F21/1894—Lever-type lifters gripping the bottom edge of wall panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/02—Clamps with sliding jaws
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/0007—Implements for finishing work on buildings for mounting doors, windows or frames; their fitting
- E04F21/0023—Implements for finishing work on buildings for mounting doors, windows or frames; their fitting for mounting door leaves, window sashes or the like
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Wing Frames And Configurations (AREA)
Abstract
DOOR JACK
ABSTRACT OF THE DISCLOSURE
A door jack comprises a fixed vertical clamp-ing member and a movable clamping member including a hori-zontal projection for receiving the weight of the door.
Guide surfaces provided on the movable clamping member and on a support therefor guide movement of the clamping member under the weight of the door so that it moves to-ward the stationary plate to clamp the door therebetween.
A spring is positioned between the movable clamping mem-ber and the support in a recess of the clamping member for withdrawing the movable clamping member when the weight of the door is removed.
ABSTRACT OF THE DISCLOSURE
A door jack comprises a fixed vertical clamp-ing member and a movable clamping member including a hori-zontal projection for receiving the weight of the door.
Guide surfaces provided on the movable clamping member and on a support therefor guide movement of the clamping member under the weight of the door so that it moves to-ward the stationary plate to clamp the door therebetween.
A spring is positioned between the movable clamping mem-ber and the support in a recess of the clamping member for withdrawing the movable clamping member when the weight of the door is removed.
Description
~.941~L7 ~OOR JACK
BACI~GROUND OF THE INVENTION
This invention relates to apparatus for clamp-ing a work piece and particularly for clamping doors.
It is well known that household doors before hanging require considerable work to carefully match the shape and size of the door to the opening in which it is to fit so as to avoid unsightly and drafty gaps around the door when hung and at the same time avoiding binding of the door when it is closed.
SUMMARY OF T~E INVENTION
-It is one object of the invention therefore to provide an apparatus for clamping a work piece which can be used to simply and readily support the door for any work necessary thereon with the clamp being operated merely by the weight of the door and the clamp being re~
moved by lifting the door from the apparatus.
Accordingly the invention provides apparatus for clamping a work piece comprising a first clamp member having a stationary vertical surface against which the work piece can be clamped, a second clamp member having a vertical surface for cooperating with that of the first clamp member and a horizontally projecting surface for
BACI~GROUND OF THE INVENTION
This invention relates to apparatus for clamp-ing a work piece and particularly for clamping doors.
It is well known that household doors before hanging require considerable work to carefully match the shape and size of the door to the opening in which it is to fit so as to avoid unsightly and drafty gaps around the door when hung and at the same time avoiding binding of the door when it is closed.
SUMMARY OF T~E INVENTION
-It is one object of the invention therefore to provide an apparatus for clamping a work piece which can be used to simply and readily support the door for any work necessary thereon with the clamp being operated merely by the weight of the door and the clamp being re~
moved by lifting the door from the apparatus.
Accordingly the invention provides apparatus for clamping a work piece comprising a first clamp member having a stationary vertical surface against which the work piece can be clamped, a second clamp member having a vertical surface for cooperating with that of the first clamp member and a horizontally projecting surface for
- 2 receiving the work piece, a support member, means mount-ing the second clamp member on the support member such that the weight of the work piece on the horizontal sur-face moves the second clamp member vertically downwardly, cooperating guide surfaces arranged on the support mem-ber and the second clamp member whereby said vertical movement causes the second clamp member to traverse hori-zontally from a first position in which the verti.cal sur-face is spaced from the stationary surface by a distance sufficient to receive the work piece to a position in which the surfaces clamp the work piece, and a spring for biasing said second clamp member to said first posi-tion.
It is one advantage of the invention there-fore that the door is firmly clamped by its own weightbetween two elongate vertical surfaces.
It is a further advantage of the invention that the clamping action is immediately removed by lift-ing the door from the apparatus since the spring acts to retract the second clamp member from the clamping posi-tion.
It is a yet further advantage of -the invention that the spring retains the second clamp member in a posi-tion where it is ready to receive a further door after the first door has been removed.
It is a yet Lurther advantage of the `nven-tion that t~e horizontal surface ls of a length less than the width of the door so that it can move toward the first clamp member, but is prevented frorn reaching it by the width of the door.
With the foregoing in view, and other advan-tages as will become apparent to those skilled in t'ne art to which this invention relates as this specification pro-ceeds, the invention is herein described by reference tothe accompanying drawings forming a part hereof, which includes a description of the best mode known to the ap-plicant and of the preferred typical embodiment of the principles of the present invention, in which:
DESCRIPTION OF THE DP~AWINGS
Figure 1 is a cross sectional view along the lines 1-1 of Figure 3 of a door jack apparatus with the door just being inserted into the apparatus for clam?ing.
Figure 2 is a side elevational view of the ap-paratus of Figure 1 with the door lowered into the clampedpositio~.
Figure 3 is a plan view of the apparatus of Figure 1 with the door removeQ.
In the drawings like characters OL reference o~
indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
The door jack apparatus shown in Figures 1, 2 and
It is one advantage of the invention there-fore that the door is firmly clamped by its own weightbetween two elongate vertical surfaces.
It is a further advantage of the invention that the clamping action is immediately removed by lift-ing the door from the apparatus since the spring acts to retract the second clamp member from the clamping posi-tion.
It is a yet further advantage of -the invention that the spring retains the second clamp member in a posi-tion where it is ready to receive a further door after the first door has been removed.
It is a yet Lurther advantage of the `nven-tion that t~e horizontal surface ls of a length less than the width of the door so that it can move toward the first clamp member, but is prevented frorn reaching it by the width of the door.
With the foregoing in view, and other advan-tages as will become apparent to those skilled in t'ne art to which this invention relates as this specification pro-ceeds, the invention is herein described by reference tothe accompanying drawings forming a part hereof, which includes a description of the best mode known to the ap-plicant and of the preferred typical embodiment of the principles of the present invention, in which:
DESCRIPTION OF THE DP~AWINGS
Figure 1 is a cross sectional view along the lines 1-1 of Figure 3 of a door jack apparatus with the door just being inserted into the apparatus for clam?ing.
Figure 2 is a side elevational view of the ap-paratus of Figure 1 with the door lowered into the clampedpositio~.
Figure 3 is a plan view of the apparatus of Figure 1 with the door removeQ.
In the drawings like characters OL reference o~
indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
The door jack apparatus shown in Figures 1, 2 and
3 comprises a base plate 10 with arms 11 at each end to provide greater stability with the base plate 10 resting upon the floor or ground. A pair of plates 12, 13 are arranged vertically upstanding frorn the base plate 11.
The plates 12, 13 are of the same width as the base plate 10 at the junction therewith but narrow out towards the top to approximately half the original width.
The plates are secured to the base plate 10 by suitable means such as welding and are supported in their vertical orientation by support flanges 14, 15 respectively which are triangular and fill the angle between the plate 10 and tne upstanding plates 12, 13.
The plate 13 comprises a first clamping plate which cooperates with a second clamping member supported between the plate 12 and the base plate 10 and generally indicated at 20. The clamping rne,nber 20 comprises an out-side frame 21 of rectangulclr construction providing sidewalls 22 and 23, a top 24 and a base 25. The plate 12 defines tlne back of the casin~ 21 so tnat it closes five sides leaving the face adjacent the plate 13 open.
The base 25 of tl.le casing 21 provides an upper ~9~0~7 guide surface 26 which lies at an angle of about 45 to the horizontal. In addition, two guide slots 27 are pro-vided in the side walls 22 and 23 respectively. The guide slots lie at the same an~le as the surface 26.
Within the casing 21 is mounted a second clamp 30 formed from a metal body of shape matching the internal shape defined by the casing 21. That is, the body 30 has a lower or bottom wall 31 inclined to match t'ne inclined wall 26 and has upper and rear walls w'nich are parallel to the plate 12 and top 2~, respectively. A horizontal pro-jection 32 extends from the bottom of the body 30 towards t'ne plate 13. A pair of pins 33, 34 are rigidly carried on either side of the body 30 so as to run in the slots 27~ 28. A Lecess 35 is provided at the top rear corner of the body 30 of sufficient size to receive a coil spring 36 attached to the top 24 adjacent the plate 12 and to the body 30 at the opposite corner of the rectangular re-cess 35. The spring 36 is under tension so as to main-tain the body 30 in its position witnin the casing 21 with ~0 the front face, indicated at 37 of the body 30 retracted in line with the front of the casing 21. In this posi-tion, the horizontal projection 32 extends into the gap between the front face 37 and the plate 13.
The spacing between t'ne front face 37 and the ~9~
plate 13 is manufactured to be slightly greater than the widt'n of the widest conventional household door so that the door can be received between the face 37 and the plate 13.
The door is indicated at 38 and in use, it is lowered into the space between the front face 37 and the plate 13 onto the projection 32. The weight of the door is sufficient to overcorne the torsion in the spring 36 and depress the body 30 downwardly. Under control of the guide surfaces provided by the surface 26 and the slots 27, 28 the body 30 moves transversely across the gap to-ward the plate 13. As the width of the projection 32 is less than the width of the door 38, the movement of the body 30 is halted when the front surface 37 contacts the side of the door 38 and the plate 13 contacts the other side of the door 38.
Xn this position, the door is firmly clamped between the surface 37 and the plate 13 under its owr.
weight. This position is shown in Figure 2.
The door remains cla,.lped by its own weight un-til lifted so that its weip,ht no longer rests upon the pro-jection 32 whereupon the spring 36 withdraws the body 30 back into the casing 21 under control of the guide sur-face 26 and the slots 27~ 28. ~n this position, the door is no longer clamped and can be readily removed Erom the position between the surface 37 and the plate 13. The strength of the spring 36 is chosen so that it is just suf-ficient to withdraw the body 30 back into the casing 21 when no weight is applied to the projection 32 but is in-sufEicient to materially affect the downward force of the door which is transferred to clamping force by the guide surfaces.
In order to provide ready access to the spring 36 for service, the top 24 is maintained in pla-ce by screws 241 in the sides 22, 23. The upper end of the spring 36 is maintained in place by a pin 242 extending across from a recess in one side 22 to a similar recess in the side 23, which pin is clamped into position by the attachment of the top 24 by the screws 241.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as iLlustra-tive only and not in a limiting sense.
The plates 12, 13 are of the same width as the base plate 10 at the junction therewith but narrow out towards the top to approximately half the original width.
The plates are secured to the base plate 10 by suitable means such as welding and are supported in their vertical orientation by support flanges 14, 15 respectively which are triangular and fill the angle between the plate 10 and tne upstanding plates 12, 13.
The plate 13 comprises a first clamping plate which cooperates with a second clamping member supported between the plate 12 and the base plate 10 and generally indicated at 20. The clamping rne,nber 20 comprises an out-side frame 21 of rectangulclr construction providing sidewalls 22 and 23, a top 24 and a base 25. The plate 12 defines tlne back of the casin~ 21 so tnat it closes five sides leaving the face adjacent the plate 13 open.
The base 25 of tl.le casing 21 provides an upper ~9~0~7 guide surface 26 which lies at an angle of about 45 to the horizontal. In addition, two guide slots 27 are pro-vided in the side walls 22 and 23 respectively. The guide slots lie at the same an~le as the surface 26.
Within the casing 21 is mounted a second clamp 30 formed from a metal body of shape matching the internal shape defined by the casing 21. That is, the body 30 has a lower or bottom wall 31 inclined to match t'ne inclined wall 26 and has upper and rear walls w'nich are parallel to the plate 12 and top 2~, respectively. A horizontal pro-jection 32 extends from the bottom of the body 30 towards t'ne plate 13. A pair of pins 33, 34 are rigidly carried on either side of the body 30 so as to run in the slots 27~ 28. A Lecess 35 is provided at the top rear corner of the body 30 of sufficient size to receive a coil spring 36 attached to the top 24 adjacent the plate 12 and to the body 30 at the opposite corner of the rectangular re-cess 35. The spring 36 is under tension so as to main-tain the body 30 in its position witnin the casing 21 with ~0 the front face, indicated at 37 of the body 30 retracted in line with the front of the casing 21. In this posi-tion, the horizontal projection 32 extends into the gap between the front face 37 and the plate 13.
The spacing between t'ne front face 37 and the ~9~
plate 13 is manufactured to be slightly greater than the widt'n of the widest conventional household door so that the door can be received between the face 37 and the plate 13.
The door is indicated at 38 and in use, it is lowered into the space between the front face 37 and the plate 13 onto the projection 32. The weight of the door is sufficient to overcorne the torsion in the spring 36 and depress the body 30 downwardly. Under control of the guide surfaces provided by the surface 26 and the slots 27, 28 the body 30 moves transversely across the gap to-ward the plate 13. As the width of the projection 32 is less than the width of the door 38, the movement of the body 30 is halted when the front surface 37 contacts the side of the door 38 and the plate 13 contacts the other side of the door 38.
Xn this position, the door is firmly clamped between the surface 37 and the plate 13 under its owr.
weight. This position is shown in Figure 2.
The door remains cla,.lped by its own weight un-til lifted so that its weip,ht no longer rests upon the pro-jection 32 whereupon the spring 36 withdraws the body 30 back into the casing 21 under control of the guide sur-face 26 and the slots 27~ 28. ~n this position, the door is no longer clamped and can be readily removed Erom the position between the surface 37 and the plate 13. The strength of the spring 36 is chosen so that it is just suf-ficient to withdraw the body 30 back into the casing 21 when no weight is applied to the projection 32 but is in-sufEicient to materially affect the downward force of the door which is transferred to clamping force by the guide surfaces.
In order to provide ready access to the spring 36 for service, the top 24 is maintained in pla-ce by screws 241 in the sides 22, 23. The upper end of the spring 36 is maintained in place by a pin 242 extending across from a recess in one side 22 to a similar recess in the side 23, which pin is clamped into position by the attachment of the top 24 by the screws 241.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as iLlustra-tive only and not in a limiting sense.
Claims
WHAT I CLAIM AS MY INVENTION:
(1) Apparatus for clamping a work piece com-prising a first clamp member having a stationary vertical surface against which the work piece can be clamped, a second clamp member having a vertical surface for coopera-ting with that of the first clamp member and a horizontally projecting surface for receiving the work piece, a support member, means mounting the second clamp member on the sup-port member such that the weight of the work piece on the horizontal surface moves the second clamp member vertically downwardly, cooperating guide surfaces arranged on the sup-port member and the second clamp member whereby said ver-tical movement causes the second clamp member to traverse horizontally from a first position in which the vertical surface is spaced from the stationary surface by a distance sufficient to receive the work piece to a position in which the surfaces clamp the work piece, and a spring for biasing said second clamp member to said first position.
(2) Apparatus according to Claim 1 wherein said cooperating guide surfaces include an upper guide surface and a lower guide surface arranged parallel so that the vertical surface remains vertical during its movement.
(3) Apparatus according to Claim 2 wherein said lower guide surface comprises an inclined surface of said support member which cooperates with a parallel bot-tom surface of the second clamp member.
(4) Apparatus according to Claim 2 wherein the support member has a wall alongside the second clamp member and wherein the upper guide surface comprises a groove provided in said wall which cooperates with a pin carried by said second clamp member.
(5) Apparatus according to Claim 1 wherein said support member surrounds five sides of the second clamp member with said vertical surface facing outwardly from the support member and with said horizontal surface projecting out from the support member.
(6) Apparatus according to Claim 5 wherein said spring comprises a torsion spring attached at the top of the support member internally thereof and lies in a recess provided in the second clamp member.
(7) Apparatus according to Claim 1 for use with a door wherein the clamp members cooperate with the sides of the door, wherein the length of the horizontal surface is less than the width of the door.
(8) Apparatus according to Claim 1 including a flat base, means for mounting the first clamp member on the flat base and means for mounting the support member on the flat base whereby the first and second clamp mem-bers can be supported in vertical orientation firmly rela-tive to the ground.
(1) Apparatus for clamping a work piece com-prising a first clamp member having a stationary vertical surface against which the work piece can be clamped, a second clamp member having a vertical surface for coopera-ting with that of the first clamp member and a horizontally projecting surface for receiving the work piece, a support member, means mounting the second clamp member on the sup-port member such that the weight of the work piece on the horizontal surface moves the second clamp member vertically downwardly, cooperating guide surfaces arranged on the sup-port member and the second clamp member whereby said ver-tical movement causes the second clamp member to traverse horizontally from a first position in which the vertical surface is spaced from the stationary surface by a distance sufficient to receive the work piece to a position in which the surfaces clamp the work piece, and a spring for biasing said second clamp member to said first position.
(2) Apparatus according to Claim 1 wherein said cooperating guide surfaces include an upper guide surface and a lower guide surface arranged parallel so that the vertical surface remains vertical during its movement.
(3) Apparatus according to Claim 2 wherein said lower guide surface comprises an inclined surface of said support member which cooperates with a parallel bot-tom surface of the second clamp member.
(4) Apparatus according to Claim 2 wherein the support member has a wall alongside the second clamp member and wherein the upper guide surface comprises a groove provided in said wall which cooperates with a pin carried by said second clamp member.
(5) Apparatus according to Claim 1 wherein said support member surrounds five sides of the second clamp member with said vertical surface facing outwardly from the support member and with said horizontal surface projecting out from the support member.
(6) Apparatus according to Claim 5 wherein said spring comprises a torsion spring attached at the top of the support member internally thereof and lies in a recess provided in the second clamp member.
(7) Apparatus according to Claim 1 for use with a door wherein the clamp members cooperate with the sides of the door, wherein the length of the horizontal surface is less than the width of the door.
(8) Apparatus according to Claim 1 including a flat base, means for mounting the first clamp member on the flat base and means for mounting the support member on the flat base whereby the first and second clamp mem-bers can be supported in vertical orientation firmly rela-tive to the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000423041A CA1194047A (en) | 1983-03-07 | 1983-03-07 | Door jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000423041A CA1194047A (en) | 1983-03-07 | 1983-03-07 | Door jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1194047A true CA1194047A (en) | 1985-09-24 |
Family
ID=4124730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000423041A Expired CA1194047A (en) | 1983-03-07 | 1983-03-07 | Door jack |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1194047A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5029814A (en) * | 1987-02-09 | 1991-07-09 | Hein-Werner Corporation | Scissor jack stand |
| US5318316A (en) * | 1992-02-12 | 1994-06-07 | Shurtleff David P | Cart for vertically oriented longitudinally extending objects |
| WO1996006998A1 (en) * | 1994-08-26 | 1996-03-07 | George Thompson | Carpenter's tools |
| US5507509A (en) * | 1993-11-26 | 1996-04-16 | Della Polla, Jr.; Michael | Adjusting brace panel cart |
| US5513836A (en) * | 1994-10-21 | 1996-05-07 | Hillenburg; Jerry | Clamping device for holding doors, panels and the like in an upright position |
| WO2003095149A2 (en) * | 2002-05-14 | 2003-11-20 | Gerald Mccann | A door clamp |
| GB2401818A (en) * | 2003-05-17 | 2004-11-24 | Patrick Dalzell | Door holder |
| US20170043454A1 (en) * | 2015-08-13 | 2017-02-16 | Charles H. Furey | Rafter Angle Square Door Clamp Stand System |
| FR3056238A1 (en) * | 2016-09-20 | 2018-03-23 | Bernard Jean Yves Bocaccio | PLATE CLAMP |
-
1983
- 1983-03-07 CA CA000423041A patent/CA1194047A/en not_active Expired
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5029814A (en) * | 1987-02-09 | 1991-07-09 | Hein-Werner Corporation | Scissor jack stand |
| US5318316A (en) * | 1992-02-12 | 1994-06-07 | Shurtleff David P | Cart for vertically oriented longitudinally extending objects |
| US5507509A (en) * | 1993-11-26 | 1996-04-16 | Della Polla, Jr.; Michael | Adjusting brace panel cart |
| WO1996006998A1 (en) * | 1994-08-26 | 1996-03-07 | George Thompson | Carpenter's tools |
| US5513836A (en) * | 1994-10-21 | 1996-05-07 | Hillenburg; Jerry | Clamping device for holding doors, panels and the like in an upright position |
| WO2003095149A3 (en) * | 2002-05-14 | 2004-08-05 | Gerald Mccann | A door clamp |
| WO2003095149A2 (en) * | 2002-05-14 | 2003-11-20 | Gerald Mccann | A door clamp |
| GB2405120A (en) * | 2002-05-14 | 2005-02-23 | Gerald Mccann | A door clamp |
| GB2405120B (en) * | 2002-05-14 | 2005-06-29 | Gerald Mccann | A door clamp |
| US7125009B2 (en) | 2002-05-14 | 2006-10-24 | Mccann Gerald | Door clamp |
| GB2401818A (en) * | 2003-05-17 | 2004-11-24 | Patrick Dalzell | Door holder |
| US20170043454A1 (en) * | 2015-08-13 | 2017-02-16 | Charles H. Furey | Rafter Angle Square Door Clamp Stand System |
| US10005173B2 (en) * | 2015-08-13 | 2018-06-26 | Charles H Furey | Rafter angle square door clamp stand system |
| FR3056238A1 (en) * | 2016-09-20 | 2018-03-23 | Bernard Jean Yves Bocaccio | PLATE CLAMP |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |