US1561217A - Apparatus for constructing walls of concrete - Google Patents
Apparatus for constructing walls of concrete Download PDFInfo
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- US1561217A US1561217A US17996A US1799625A US1561217A US 1561217 A US1561217 A US 1561217A US 17996 A US17996 A US 17996A US 1799625 A US1799625 A US 1799625A US 1561217 A US1561217 A US 1561217A
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- mold
- plates
- wall
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- mold plates
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
- E04G11/34—Horizontally-travelling moulds for making walls blockwise or section-wise
Definitions
- This invention relates to improvements in apparatus to facilitate the forming of concrete structures.
- the object 01" my invention is to provide mold plates and connector parts therefor, so constructed and combined and capable oi being so manipulated, that a concrete wall structure maybe formed accurately and expeditiously by the exercise of only ordinary skill.
- My invention contemplates the combination of a pair of mold plates, tie bolts and connections to retain the plates spaced apart, and which tie bolts are capable of being easily removed from the concrete after the plates are removed, cross pins adapted to be disposed in the holes formed by the removing of the said tie bolts, longitudinal track bars adapted to rest on the projecting portions of the cross pins and to support a mold plate at each side of the concrete structure, latches carried by the track bar to hold it on the cross pins and clamp means on the track bars to press against the mold plates.
- Figure l is a side view showing the co ner mold-plates set up in readiness to receive the plastic material.
- Figure 2 is a top plan view of Figure 1.
- Figure 3 shows the base piece of the corner structure after having been molded in the mold plates as seen in Figure l; the said moldplates having been bolted to position on the said base piece and in readiness to receive the plastic material.
- Figure 4 shows the concrete corner structure after having been developed to higher level in the mold-plates at the position shown in Figure 3; the said mold-plates being bolted to a furtherraised position erial NO- 1 ,995-
- FIG. 5 shows the concrete corner structure developed to the height shown in Figure 3,; the mold plates having been removed, nd he ti -b l hav ng ee remove and whereby the holes, spaced as hOWn, are pro ided
- Figure 6 shows the wall mold-plates at set position to receive the plastic material.
- Figure 7 is a plan view of Figure 6.
- Figure 8 is a view of Figure" 6, as seen in direction of the arrow 8.
- Figure 9 shows the first section ofthe wall bottom-course completed, and the wall mold-plates set at advanced position for another ',filling of the plastic material.
- Figure 10 shows the bottom wall-course completed to the extent for which the molds were set, (as shown in Figure 9), the track bars having been placed in position and the mold-plates being set thereon in readiness for forming the first section of the second wall-course.
- Figure 11 is a view of Figure 10, in direction of arrow 11.
- Figure 12 shows the completion of the wall according to the setting of the mold plates in the preceding view, the said mold plates in the present view having been advanced on the track bars and set for another forming of the plastic material...
- Figure 18 is an enlarged cross section view taken on the line 1313 in Figure 12.
- Figure 14 is an enlarged cross section view taken on the line 141 l in Figure 12.
- Figure 15 is a detail view of a section of the track bar and its connections.
- Figure 16 is a'detail view of the cross pin latch dog.
- Figure 17 is a detail view of the check lugs.
- Figure 18 is a cross section view on lin 1818 in Figure 15.
- Figure 19 is a detail View of the tie-bolt latch.
- the concrete corner structure I For constructing the concrete corner structure I provide an outer angle moldplate of sheet metal and which in the present case is shown having a length of thirty two inches.
- the body portions A and A? are bent at a right angle to each other and the sides B and B are each inturned at a right angle, as shown in the plan view ure 2, the transverse dimensions of the said side portion being that desired for the thickness of the wall.
- An inner-angle mold-plate having its body portion G and bent at a right angle to each other, is provided with lower, intermediate and upper holes designated as D, E, and F respectively near the edge of each body portion, and spaced as shown in Figure l, and which said holes register with holes similarly spaced in the outer-angle mold-plate.
- Tie bolts l-l constructed as shown in Figure 13 serve to hold these said moldplates at correct relative spaced position, and perform a further function of providing suitable bores in the concrete for the reception of the cross pins hereinafter to be referred to.
- each of the said bolts H is seven eighths of an inch in diameter, and eight inches, shoulder to shoulder; the grooves H in the ends are engaged by latches J that are carried on the outer surfaces of the mold-plates.
- the mold plates will be helc securely in place.
- the plastic concrete mixture is then deposited in the mold, completely filling same; the mold plates are presently removed and the tie bolts H are also removed.
- the mold plates are disposed at a higher position as shown in Figure 3., the tie bolt being inserted through the holes E and F, and latched, and a subsequent and similar operation is performed, the corner structure being thus developed to such height as may be desired, and being provided with the holes D E F and G spaced as shown in Figure 5.
- the corner structure may be constructed with rapidity and accuracy, there being no tendency for the moldplates to become misaligned.
- the user In constructing the wall bottom-course it is suggested that the user should work to a line drawn from one corner structure to the other, so that in worlr the wall moldplates presently to be described, the said bottom-course will have been developed in straight form, and it should be preparatory ⁇ O the maturing and build'ng up of the superineumbent deposits of plastic material which is to constitute the wall proper.
- Each of the complemental wall moldtes of sheet metal is eighteen inches thirty-sir inches long and about k ths of an inch thick, and may be provided with exterior stiffener ribs K when latched to the position shown in Figure 7 the faces of the inturned end portions it? are at registration, and the hinged bottom gates K are at vertical or closed position.
- the forward portions of these plates are retained at spaced distance apart by tie bolts H, and the rearward portions of said plates are fastened by similar bolts on each side of one leg of the corner structure.
- the first section of the wall bottom-course and designated as 1.
- each of these pins is of the construction and function illustrated in fl igure 1 being of diameter to tit easily in the hole provided by the removing of the tie bolt H, and of length to provide bearing for a track bar M that is disposed longitudinally on each side of the concrete wall section.
- check lugs M At spaced location on the bottom of this track bar are check lugs M to engage the opposite sides of the ends of the cross pins, thereby holding the track bar agaii longitudinal movement.
- On the outer tical leg of this track bar are loosely d posed latches, M of form as shown in Figure 15 and spaced to register with the cross pins in the holes in the wall.
- This latch M is adapted to engage an annular groove L that is provided near ti c end of the cross pin and at such location relative to the nose of the latch that when the latches are operated the track bar. a 'e held firmly against each side of the w structure.
- the holes may be filled from the exterior surface of the wall, the interior portions being left open for the purpose of either receiving the plastering material that be applied, or serve as recesses in which nailing plugs or blocks may be inserted.
- Vfhere walls are to be provided with ventilated interior surfacing, wooden stringers or nailing strips may be secured to the wooden plugs retained in said holes.
- An apparatus of the kind described conprising mold plates spaced apart, tie bolts to retain said plates at position and which said tie bolts are capable of being re moved from the concrete material deposited between said plates, cross pins adapted to be disposed in the holes formed by the said tie bolts, longitudinal track bars to rest on the projecting portions of the cross pins and to siiipport a mold plate at each side of the concrete structure, latches to secure the said traclr bars, and clamping means to hold the mold plates against the wall structure.
- An apparatus of the kind described comprising complemental mold plates, tie bolts to retain said plates spaced apart, and
- tie bolts are capable of being removed from the concrete, cross inns adapted to be u 1 0 I disposed in the holes form d by said tie to of the con t ck bar at each c latches to secure the track bars he projecting portions of the cross pins and to hold. against the sides of the conc ete st: act'iire, means between the ti ck bars the mold plates to press the latter against the sides of the concrete structure.
- .zlpparatus of the kind described comprising complemental mold plates, tie bolts to retain s l plates spaced apart and which are remove. s from the molded structure af ter the mold plates are removed, cross pins to be disposed in the holes formed by said tie bolts, track bars to rest on the end portions of the cross pins and to support a mold plate on each side of the molded structure, latches to connect the track bars and cross pins together, and clamps to hold the mold plates against the sides of the molded structure.
- An apparatus of the kind described comprising complemental mold plates having plain rearward ends, their forward ends being turned inwardl to become coengaged when the mold plates are at set position, tie bolts to hold the mold plates at spaced position apart, and which are capable of being removed from the molded structure after the mold plates are removed, cross pins adapted to be disposed in the holes formed by said. tie bolts, longitudinal track bars adapted to rest on the projecting portions of said cross pins and to support a mold plate at each side of the upper portion of the molded structure, latch connections between the track bars and the said cross pins to hold the track bars at position, and means between the track bars and the mold plates to .hold the latter against the sides of the molded structure.
- An apparatus for molding comprising matched mold plates in which to mold a corner structure, tie bolts to retain the mold plates spaced apart and which are adapted to form holes in the vertical portion of said corner structure, complemental wall mold plates having plain rearward ends and whose forward ends are inturned to coeneach other, tie bolts to fasten the rearward. ends of the wall mold plates to the said corner structure, and similar tie bolts to retain the forward upper portions of the wall mold plates spaced apart, and which said tie bolts are removable from the molded structure after the mold plates are removed, substantially as and for the purposes described.
- An apparatus of the kind described comprising matched mold plates in which to mold a corner structure, tie bolts for said mold plates and which are located near the edge of said plates; and which are removable from the mold-ail structliare after the mold plates are remme l eolnplenientel Wall mold plates Whose rearward ends are adapted to register on each side of one leg of the corner stnmtnre longitudinal creel: bare shaped czoee section anal upon horizon ege the lower eo M the mold plate: m2 ZZLlZLPlJGll to rest, eros x; 10 pins in the molded el'wctme Whose rojecting poi'l'ions are ozlptee to supper? the tree]; 4;; bars 931 between ll to ho molded n u.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Description
J. R. COMPTON APPARATUS FOR CONSTRUCTING WALLS OF CONCRETE I Nov. 10, 1925- Filed March 24, 1925 2 Sheets-Sheet l K E ,m M p a B T a T T0 6 E. R 5 E M BELUJ D F 1 4h .9 I F K E m M Nov. 10, 1925- J. R. QQMPTON APPARATUS FOR cous'rnucwme WALLS OF concurs Filed Mgr-ch 24, 1925 2 Sheets-Sheet 2 ull unhTfl //VVE/Y7DR Janus R. CoMPTmv. 7
J TTORNEK o F n 2 N u n F, @WQFW 9 v A -6. m J 3 n M v M vllllllfl ll rllaw 8 1 U.
Patented Nov. 10, 11925 umrsn STATES JAMES R. COMPTON, 0F KEWANNA, INDIANA.
APPARATUS FOR CONSTRUCTING WALLS 0E CONCRETE.
Application filed March 24, 1925.
To all whom it may concern:
Be it known that 1, JAMES R. COMPTON, a citizen of the United States, residing at Kewanna, in the county of Fulton and State of Indiana, have invented new and useful Improvements in Apparatus for Constructing Walls of Concrete, and of which said invention the following is a specification.
This invention relates to improvements in apparatus to facilitate the forming of concrete structures.
The object 01" my invention is to provide mold plates and connector parts therefor, so constructed and combined and capable oi being so manipulated, that a concrete wall structure maybe formed accurately and expeditiously by the exercise of only ordinary skill.
My invention contemplates the combination of a pair of mold plates, tie bolts and connections to retain the plates spaced apart, and which tie bolts are capable of being easily removed from the concrete after the plates are removed, cross pins adapted to be disposed in the holes formed by the removing of the said tie bolts, longitudinal track bars adapted to rest on the projecting portions of the cross pins and to support a mold plate at each side of the concrete structure, latches carried by the track bar to hold it on the cross pins and clamp means on the track bars to press against the mold plates.
The preferred form of the several parts of my improved apparatus, and the co1nbination and arrangementthereof, for carrying my invention into ei'lect, are shown in the drawings, in which suitable reference characters are used.
Figure l is a side view showing the co ner mold-plates set up in readiness to receive the plastic material.
Figure 2 is a top plan view of Figure 1.
Figure 3 shows the base piece of the corner structure after having been molded in the mold plates as seen in Figure l; the said moldplates having been bolted to position on the said base piece and in readiness to receive the plastic material.
Figure 4 shows the concrete corner structure after having been developed to higher level in the mold-plates at the position shown in Figure 3; the said mold-plates being bolted to a furtherraised position erial NO- 1 ,995-
and in readiness to again receive the plastic ma erial- Figure 5 shows the concrete corner structure developed to the height shown in Figure 3,; the mold plates having been removed, nd he ti -b l hav ng ee remove and whereby the holes, spaced as hOWn, are pro ided Figure 6 shows the wall mold-plates at set position to receive the plastic material.
Figure 7 is a plan view of Figure 6.
Figure 8 is a view of Figure" 6, as seen in direction of the arrow 8.
Figure 9 shows the first section ofthe wall bottom-course completed, and the wall mold-plates set at advanced position for another ',filling of the plastic material.
Figure 10 shows the bottom wall-course completed to the extent for which the molds were set, (as shown in Figure 9), the track bars having been placed in position and the mold-plates being set thereon in readiness for forming the first section of the second wall-course.
Figure 11 is a view of Figure 10, in direction of arrow 11.
Figure 12 shows the completion of the wall according to the setting of the mold plates in the preceding view, the said mold plates in the present view having been advanced on the track bars and set for another forming of the plastic material...
Figure 18 is an enlarged cross section view taken on the line 1313 in Figure 12.
Figure 14 is an enlarged cross section view taken on the line 141 l in Figure 12.
Figure 15 is a detail view of a section of the track bar and its connections.
Figure 16 is a'detail view of the cross pin latch dog.
Figure 17 is a detail view of the check lugs.
Figure 18 is a cross section view on lin 1818 in Figure 15.
Figure 19 is a detail View of the tie-bolt latch.
For constructing the concrete corner structure I provide an outer angle moldplate of sheet metal and which in the present case is shown having a length of thirty two inches. The body portions A and A? are bent at a right angle to each other and the sides B and B are each inturned at a right angle, as shown in the plan view ure 2, the transverse dimensions of the said side portion being that desired for the thickness of the wall.
An inner-angle mold-plate having its body portion G and bent at a right angle to each other, is provided with lower, intermediate and upper holes designated as D, E, and F respectively near the edge of each body portion, and spaced as shown in Figure l, and which said holes register with holes similarly spaced in the outer-angle mold-plate. Tie bolts l-l constructed as shown in Figure 13 serve to hold these said moldplates at correct relative spaced position, and perform a further function of providing suitable bores in the concrete for the reception of the cross pins hereinafter to be referred to.
For wall construction of the thickness herein illustrated, namely, eight inches, each of the said bolts H is seven eighths of an inch in diameter, and eight inches, shoulder to shoulder; the grooves H in the ends are engaged by latches J that are carried on the outer surfaces of the mold-plates.
It is apparent that with the la ches set at closed position, the mold plates will be helc securely in place. The plastic concrete mixture is then deposited in the mold, completely filling same; the mold plates are presently removed and the tie bolts H are also removed. To develop the said unit further, the mold plates are disposed at a higher position as shown in Figure 3., the tie bolt being inserted through the holes E and F, and latched, and a subsequent and similar operation is performed, the corner structure being thus developed to such height as may be desired, and being provided with the holes D E F and G spaced as shown in Figure 5. By the use of the mold plates as described the corner structure may be constructed with rapidity and accuracy, there being no tendency for the moldplates to become misaligned.
In constructing the wall bottom-course it is suggested that the user should work to a line drawn from one corner structure to the other, so that in worlr the wall moldplates presently to be described, the said bottom-course will have been developed in straight form, and it should be preparatory {O the maturing and build'ng up of the superineumbent deposits of plastic material which is to constitute the wall proper.
Each of the complemental wall moldtes of sheet metal, is eighteen inches thirty-sir inches long and about k ths of an inch thick, and may be provided with exterior stiffener ribs K when latched to the position shown in Figure 7 the faces of the inturned end portions it? are at registration, and the hinged bottom gates K are at vertical or closed position. The forward portions of these plates are retained at spaced distance apart by tie bolts H, and the rearward portions of said plates are fastened by similar bolts on each side of one leg of the corner structure. Into the mold thus formed, and as shown in Figure 6, there is constructed the first section of the wall bottom-course, and designated as 1. (See Figure 9.) After the mold so constituted as described, is properly filled with the plastic material, bolts H are unlatched and removed, and the mold-plates K are set up again in a manner similar to that just described; a second sew-- tion, designated as 2, of the wall bottom-- course is then formed. Additional sections may be forn'red in the manner as just described until the wall bottoin-course will have been completed, and the bolts H removed.
The superincumbent portion of the wall formed in the marine as follows:
In the several holes, thus formed, in the upper portion of he first course, are inserted the cross pins L. Each of these pins is of the construction and function illustrated in fl igure 1 being of diameter to tit easily in the hole provided by the removing of the tie bolt H, and of length to provide bearing for a track bar M that is disposed longitudinally on each side of the concrete wall section. At spaced location on the bottom of this track bar are check lugs M to engage the opposite sides of the ends of the cross pins, thereby holding the track bar agaii longitudinal movement. On the outer tical leg of this track bar, are loosely d posed latches, M of form as shown in Figure 15 and spaced to register with the cross pins in the holes in the wall. The nose of this latch M is adapted to engage an annular groove L that is provided near ti c end of the cross pin and at such location relative to the nose of the latch that when the latches are operated the track bar. a 'e held firmly against each side of the w structure. This track bar angle shaped in cross section, and at spaced distances on the vertical leg (as shown in Figure 15), are clamps M This clamp (as shown in Figure 18) so functions that when it will have been moved to the position as shown, the Boldplate is clamped tightly against the wall.
The method of handling the mold-plates and forming the successive sections which are to constitute the superincumbent portions of the wall structure, is apparent by inspecting the views Figures 10, 11, and 12. the mold-plates being dispoiied on the traci; bars M. The use of bolts H at the upper holes only is necessary, the lower porti of the mold-plates being held y clamps M To remove the mold plates, the clamps ill are thrown to the dotted line position. Wi th the release of the lower portion of the mold plates, the tie bolt latches are easily operated thereby detaching the plates from the tie bolts. The tie bolts are then removed, and the mold-plates are moved slidingly along the track bars to the next advanced position (see Figure 12). Tie bolts are again serted at place and latched. hen the clamps M are thrown to closed position thereby holding the plates at snug con act with the outer faces of the wall subsect It is observed in Figure l l that this a of contact is sutlicient to provide cori v tical alignment of the mold-platc.=.
After the wall will have been completed, the holes may be filled from the exterior surface of the wall, the interior portions being left open for the purpose of either receiving the plastering material that be applied, or serve as recesses in which nailing plugs or blocks may be inserted. Vfhere walls are to be provided with ventilated interior surfacing, wooden stringers or nailing strips may be secured to the wooden plugs retained in said holes.
By means of the simple and economical ,construction, combination and arrangement of parts shown and described, it is possible for a person of only ordinary skill to construct the corner structures and walls, vhich would otherwise be not available.
It is obvious that the general principles involved in my present invention are capabio of being embodied in mold plates and forms of different thicknesses, widths and heights. By providing conligurated inner surfaces for the mold plates, there may be had relief effect of any desired design for the outer surface of the well.
While sheet steel is considered suitable as the kind of metal desired for the mold plates, it is practicable to construct the mold plates of cast aluminum provided with external stiffening ribs, and the inner faces of which may be provided with variegated designs in relief, either for utility for purpose of ornamentation, or for the purpose of providing surfaces adapted especially for the receiving of stucco or other external finishing material.
What I claim as my invention, and desire to secure by Letter lPatent, is:
1. An apparatus of the kind described, conprising mold plates spaced apart, tie bolts to retain said plates at position and which said tie bolts are capable of being re moved from the concrete material deposited between said plates, cross pins adapted to be disposed in the holes formed by the said tie bolts, longitudinal track bars to rest on the projecting portions of the cross pins and to siiipport a mold plate at each side of the concrete structure, latches to secure the said traclr bars, and clamping means to hold the mold plates against the wall structure.
2. An apparatus of the kind described, comprising complemental mold plates, tie bolts to retain said plates spaced apart, and
which tie bolts are capable of being removed from the concrete, cross inns adapted to be u 1 0 I disposed in the holes form d by said tie to of the con t ck bar at each c latches to secure the track bars he projecting portions of the cross pins and to hold. against the sides of the conc ete st: act'iire, means between the ti ck bars the mold plates to press the latter against the sides of the concrete structure.
3. .zlpparatus of the kind described, comprising complemental mold plates, tie bolts to retain s l plates spaced apart and which are remove. s from the molded structure af ter the mold plates are removed, cross pins to be disposed in the holes formed by said tie bolts, track bars to rest on the end portions of the cross pins and to support a mold plate on each side of the molded structure, latches to connect the track bars and cross pins together, and clamps to hold the mold plates against the sides of the molded structure.
4-. An apparatus of the kind described, comprising complemental mold plates having plain rearward ends, their forward ends being turned inwardl to become coengaged when the mold plates are at set position, tie bolts to hold the mold plates at spaced position apart, and which are capable of being removed from the molded structure after the mold plates are removed, cross pins adapted to be disposed in the holes formed by said. tie bolts, longitudinal track bars adapted to rest on the projecting portions of said cross pins and to support a mold plate at each side of the upper portion of the molded structure, latch connections between the track bars and the said cross pins to hold the track bars at position, and means between the track bars and the mold plates to .hold the latter against the sides of the molded structure.
5. An apparatus for molding, comprising matched mold plates in which to mold a corner structure, tie bolts to retain the mold plates spaced apart and which are adapted to form holes in the vertical portion of said corner structure, complemental wall mold plates having plain rearward ends and whose forward ends are inturned to coeneach other, tie bolts to fasten the rearward. ends of the wall mold plates to the said corner structure, and similar tie bolts to retain the forward upper portions of the wall mold plates spaced apart, and which said tie bolts are removable from the molded structure after the mold plates are removed, substantially as and for the purposes described.
6. An apparatus of the kind described, comprising matched mold plates in which to mold a corner structure, tie bolts for said mold plates and which are located near the edge of said plates; and which are removable from the mold-ail structliare after the mold plates are remme l eolnplenientel Wall mold plates Whose rearward ends are adapted to register on each side of one leg of the corner stnmtnre longitudinal creel: bare shaped czoee section anal upon horizon ege the lower eo M the mold plate: m2 ZZLlZLPlJGll to rest, eros x; 10 pins in the molded el'wctme Whose rojecting poi'l'ions are ozlptee to supper? the tree]; 4;; bars 931 between ll to ho molded n u. F
ers elai'np devices between the track l mold plaies latching means pin: real he truck bars ill? sides of the d. fie bolt? to re ein the ;he Well mole plates ring means s'mrriecl by ob l'he plates" nmy be fie holj' s.
JAMES R. (TOMFPON.
vonneefell lo he
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17996A US1561217A (en) | 1925-03-24 | 1925-03-24 | Apparatus for constructing walls of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17996A US1561217A (en) | 1925-03-24 | 1925-03-24 | Apparatus for constructing walls of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1561217A true US1561217A (en) | 1925-11-10 |
Family
ID=21785701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17996A Expired - Lifetime US1561217A (en) | 1925-03-24 | 1925-03-24 | Apparatus for constructing walls of concrete |
Country Status (1)
| Country | Link |
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| US (1) | US1561217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100276568A1 (en) * | 2007-02-13 | 2010-11-04 | Artur Schwoerer | Formwork systems for forming corners and t intersections using formwork elements comprising centrally alined up tie holes |
-
1925
- 1925-03-24 US US17996A patent/US1561217A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100276568A1 (en) * | 2007-02-13 | 2010-11-04 | Artur Schwoerer | Formwork systems for forming corners and t intersections using formwork elements comprising centrally alined up tie holes |
| US8360389B2 (en) * | 2007-02-13 | 2013-01-29 | Peri Gmbh | Formwork systems for forming corners and T intersections using formwork elements comprising centrally lined up tie holes |
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