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Publication numberUS20070277577 A1
Publication typeApplication
Application numberUS 11/262,631
Publication dateDec 6, 2007
Filing dateOct 31, 2005
Priority dateOct 29, 2004
Also published asUS7685858, US7954352, US20080223103, US20100147046, US20110232353
Publication number11262631, 262631, US 2007/0277577 A1, US 2007/277577 A1, US 20070277577 A1, US 20070277577A1, US 2007277577 A1, US 2007277577A1, US-A1-20070277577, US-A1-2007277577, US2007/0277577A1, US2007/277577A1, US20070277577 A1, US20070277577A1, US2007277577 A1, US2007277577A1
InventorsClyde Allen, Todd Lajewski, Douglas Break
Original AssigneeAllen Clyde G, Lajewski Todd M, Douglas Break
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sheet metal brake and hinge mechanism therefor
US 20070277577 A1
Abstract
A bending brake assembly for manually bending pieces of sheet metal material including a base (20) supporting a plurality of c-shaped members (22). Each c-shaped member (22) presents opposing clamping surfaces (24) for receiving a sheet metal material between the clamping surfaces (24). The assembly also includes a bending member (26) and a socket connection (28) rotatably supporting the bending member (26) on the base (20) for bending a piece of sheet metal material disposed between the clamping surfaces (24). The socket connection (28) includes a male portion (30) and a female portion (32) in sliding engagement with one another. A bearing strip (34) is sandwiched between the male portion (30) and the female portion (32) for facilitating relative movement between the male portion (30) and the female portion (32).
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Claims(10)
1. A bending brake assembly for manually bending pieces of sheet metal material comprising:
a base (20),
a plurality of generally c-shaped members (22) supported by said base (20) and each presenting opposing clamping surfaces (24) for receiving a sheet of material between said clamping surfaces (24),
a bending member (26),
a socket connection (28) rotatably supporting said bending member (26) on said base (20) for bending a piece of sheet metal material disposed between said clamping surfaces (24),
said socket connection (28) including a male portion (30) and a female portion (32) in sliding engagement with one another, and
characterized by a bearing strip (34) being sandwiched between said male portion (30) and said female portion (32) for facilitating relative movement between said male portion (30) and said female portion (32).
2. A bending brake assembly as set forth in claim 1 including a first mechanical connection (36) connecting said bearing strip (34) to one of said male portion (30) and said female portion (32).
3. A bending brake assembly as set forth in claim 2 wherein said first mechanical connection (36) includes a projection (38) and a recess (40) for securing said bearing strip (34) to one of said portions (30, 32).
4. A bending brake assembly as set forth in claim 2 wherein said female portion (30) and said male portion (30) are arcuate and said bearing strip (34) is arcuate and complementary to said portions (30, 32).
5. A bending brake assembly as set forth in claim 2 wherein said male portion (30) presents an arcuate upper surface (42) and said base (20) includes a pocket (44) defining a fulcrum engaging said upper surface (42) of said male portion (30) for guiding arcuate movement of said bending member (26) as said arcuate male portion (30) slides along said bearing strip (34).
6. A bending brake assembly as set forth in claim 5 wherein said male portion (30) presents a slanted corner (46) for bending the sheet metal material.
7. A bending brake assembly as set forth in claim 6 including a rubber strip (48) secured to said slanted corner (46) for preventing damage to the sheet metal material.
8. A bending brake assembly as set forth in claim 7 including a finger (56) extending from a distal end (58) of said male portion (30) for engaging said pocket (44) to limit movement of said male portion (30) into said pocket (44) in a pre-bending position of said bending member (26).
9. A bending brake assembly as set forth in claim 8 including a second mechanical connection (50) connecting said rubber strip (48) to said male portion (30)
10. A bending brake assembly as set forth in claim 9 wherein said second mechanical connection (50) includes a protrusion (52) and a nook (54) for securing said rubber strip (48) to said male portion (30).
Description
    CROSS REFERENCE TO RELATED APPLICATION
  • [0001]
    This application claims the benefit of Provisional Patent Application Ser. No. 60/623,468, filed Oct. 29, 2004, all of its contents incorporated herein in their entirety.
  • BACKGROUND OF THE INVENTION
  • [0002]
    1. Field of the Invention
  • [0003]
    The subject invention relates to a bending brake assembly for manually bending pieces of sheet metal material.
  • [0004]
    2. Description of the Prior Art
  • [0005]
    A bending brake assembly generally includes a base and a plurality of generally c-shaped members supported by the base and each presenting opposing clamping surfaces for receiving a sheet of metal material between the clamping surfaces. Furthermore, the assembly generally includes a bending member and a socket connection rotatably supporting the bending member on the base for bending a piece of sheet metal material disposed between the clamping surfaces. The socket connection generally includes a male portion and a female portion in sliding engagement with one another or connected by a pin hinge connection to one another. Examples of bending brake assemblies and socket connections as specified are shown in U.S. Pat. No. 4,282,735, issued to Douglas G. Break and in U.S. Pat. No. 6,389,864, issued to Arthur B. Chubb.
  • [0006]
    Constant and continuous usage of the bending brake assembly causes the male portion to erode due to the frictional force generated by the surface of the male portion sliding against the surface of the female portion during the process of bending a piece of sheet metal material.
  • SUMMARY OF THE INVENTION AND ADVANTAGES
  • [0007]
    The present invention provides such a bending brake assembly distinguished by a bearing strip being sandwiched between the male portion and the female portion for facilitating relative movement between the male portion and the female portion.
  • [0008]
    The bearing strip minimizes the erosion of the male portion due to the frictional force generated by the surface of the male portion sliding against the surface of the female portion during the process of bending a piece of sheet metal material.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0009]
    Other advantages of the present invention will be readily appreciated, as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
  • [0010]
    FIG. 1 is a perspective view of a sheet bending brake assembly embodying the invention;
  • [0011]
    FIG. 2 is a perspective view of a base of the present invention;
  • [0012]
    FIG. 3 is an alternative perspective view of the base shown in FIG. 2;
  • [0013]
    FIG. 4 is a vertical sectional view of the sheet bending brake assembly;
  • [0014]
    FIG. 5 is an alternative vertical sectional view of the sheet bending brake assembly;
  • [0015]
    FIG. 6 is a front view of the sheet bending brake assembly;
  • [0016]
    FIG. 7 is an alternative perspective view of the sheet bending brake assembly;
  • [0017]
    FIG. 8 is a top plan view of the sheet bending brake assembly;
  • [0018]
    FIG. 9 is a perspective view of a socket connection of the present invention; and
  • [0019]
    FIG. 10 is an operational perspective view of the socket connection shown in FIG. 9.
  • DETAILED DESCRIPTION OF THE INVENTION
  • [0020]
    Referring to the Figures, wherein like numerals indicate corresponding parts throughout the several views, a bending brake assembly for manually bending pieces of sheet metal material is shown including a base (20). A plurality of generally c-shaped members (22) are supported by the base (20) and each c-shaped member (22) presents opposing clamping surfaces (24) for receiving a sheet metal material between the clamping surfaces (24).
  • [0021]
    The bending brake assembly also includes a bending member (26). A socket connection (28) rotatably supports the bending member (26) on the base (20) for bending a piece of sheet metal material disposed between the clamping surfaces (24). The socket connection (28) includes a male portion (30) and a female portion (32) in sliding engagement with one another.
  • [0022]
    The bending brake assembly is distinguished by a bearing strip (34) being sandwiched between the male portion (30) and the female portion (32) for facilitating relative movement between the male portion (30) and the female portion (32). The bearing strip (34) minimizes the erosion of the male portion (30) which occurs due to the frictional force exerted on the male portion (30) when the male portion (30) slides against the female portion (32) due to the bending member (26) being used to bend sheet metal material.
  • [0023]
    The bending brake assembly also includes a first mechanical connection (36) that connects the bearing strip (34) to one of the male portion (30) and the female portion (32). The first mechanical connection (36) includes a projection (38) and a recess (40) for securing the bearing strip (34) to one of the portions (30, 32).
  • [0024]
    The female portion (32) and the male portion (30) are arcuate and the bearing strip (34) is arcuate and complementary to the portions (30, 32). The male portion (30) presents an arcuate upper surface (42) and the base (20) includes a pocket (44) defining a fulcrum engaging the upper surface (42) of the male portion (30) for guiding arcuate movement of the bending member (26) as the arcuate male portion (30) slides along the bearing strip (34).
  • [0025]
    The male portion (30) is configured for applying force to a sheet metal material so that the sheet metal material can be bent with precision and accuracy. The configuration entails the male portion (30) presenting a slanted corner (46) for bending the sheet metal material. The slanted corner (46) permits direct force to be applied to the sheet metal material at a particular location.
  • [0026]
    A rubber strip (48) is secured to the slanted corner (46) for preventing damage to the sheet metal material. In operation the bending member (26) is raised which causes the rubber strip (48) secured to the slanted corner (46) to directly contact the sheet metal material. The rubber strip (48) prevents the possibility of slippage by the bending member (26) once it contacts the sheet metal material. The rubber strip (48) also prevents the sheet metal material from being marred by scratches and dents which could occur if the bending member (26) directly contacted the sheet metal material during the bending process. Both the bending member (26) and the sheet metal material are formed of metal properties which make it likely that the sheet metal material could be damaged by impact of the two metals contacting each other directly during the bending process.
  • [0027]
    A second mechanical connection (50) secures the rubber strip (48) to the male portion (30). The second mechanical connection (50) includes a protrusion (52) and a nook (54) for securing the rubber strip (48) to the male portion (30).
  • [0028]
    A finger (56) extends from a distal end (58) of the male portion (30) for engaging the pocket (44) to limit movement of the male portion (30) into the pocket (44) in a pre-bending position of the bending member (26). The finger (56) also behaves as a stop for the male portion (30) by ensuring that the male portion (30) does not disengage from the female portion (32) during the bending process wherein the bending member (26) is elevated.
  • [0029]
    Obviously, many modifications and variations of the present invention are possible in light of the above teachings. The invention may be practiced otherwise than as specifically described within the scope of the appended claims, wherein that which is prior art is antecedent to the novelty set forth in the “characterized by” clause. The novelty is meant to be particularly and distinctly recited in the “characterized by” clause whereas the antecedent recitations merely set forth the old and well-known combination in which the invention resides. These antecedent recitations should be interpreted to cover any combination in which the incentive novelty exercises its utility. In addition, the reference numerals in the claims are merely for convenience and are not to be read in any way as limiting.
  • ELEMENT LIST
  • [0030]
    Element Symbol Element Name
    20 base
    22 c-shaped members
    24 clamping surfaces
    26 bending member
    28 socket connection
    30 male portion
    32 female portion
    34 bearing strip
    36 first mechanical connection
    38 projection
    40 recess
    42 arcuate upper surface
    44 pocket
    46 slanted corner
    48 rubber strip
    50 second mechanical connection
    52 protrusion
    54 nook
    56 finger
    58 distal end
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US864663 *Apr 13, 1906Aug 27, 1907Charles MarkelDriving-box brass.
US3359771 *Jul 1, 1965Dec 26, 1967Dreis & Krump Mfg CoBench brake
US3817075 *Mar 1, 1973Jun 18, 1974Tapco Products CoSheet metal brake
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US4092841 *Dec 20, 1976Jun 6, 1978Jayson CorporationSheet metal brake
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US4282735 *Aug 21, 1979Aug 11, 1981Van Mark Products CorporationBrake for sheet metal or the like
US4566304 *Jan 18, 1983Jan 28, 1986Van Mark Products CorporationSheet metal bending brake
US6003357 *Feb 26, 1998Dec 21, 1999Brown; Roy D.Sheet metal brake accessory
US6389864 *Feb 4, 2000May 21, 2002Tapco International CorporationHeavy duty sheet bending brake
US6675619 *Feb 6, 2002Jan 13, 2004Tapco International CorporationSheet bending brake
US6941788 *Jan 5, 2001Sep 13, 2005DimosBending brake for flat blank
US7191631 *Nov 9, 2004Mar 20, 2007Tapco International CorporationSheet metal bending brake with improved hinge
USRE31938 *Nov 23, 1983Jul 9, 1985Chesley F. Carlson CompanyWeb bending fixture
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7549311Mar 7, 2008Jun 23, 2009Tapco International CorporationSheet metal bending brake
US7669451Jun 23, 2009Mar 2, 2010Tapco International CorporationSheet metal bending brake
US7954352Feb 18, 2010Jun 7, 2011Tapco International CorporationSheet metal bending brake
US20080216549 *Mar 7, 2008Sep 11, 2008Tapco International CorporationSheet metal bending brake
US20090255315 *Jun 23, 2009Oct 15, 2009Tapco International CorporationSheet metal bending brake with improved hinge
US20100147046 *Feb 18, 2010Jun 17, 2010Tapco International CorporationSheet metal bending brake
US20110232353 *Jun 6, 2011Sep 29, 2011Tapco International CorporationSheet metal bending brake
Classifications
U.S. Classification72/319
International ClassificationB21D5/04
Cooperative ClassificationB21D5/042
European ClassificationB21D5/04
Legal Events
DateCodeEventDescription
Feb 21, 2006ASAssignment
Owner name: TAPCO INTERNATIONAL CORPORATION, MICHIGAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ALLEN, CLYDE G.;LAJEWSKI, TODD M.;REEL/FRAME:017572/0546
Effective date: 20051031
Owner name: TAPCO INTERNATIONAL CORPORATION, MICHIGAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BREAK, DOUGLAS;REEL/FRAME:017591/0824
Effective date: 20060213