EP2581175A1 - Cord protector for power tools - Google Patents
Cord protector for power tools Download PDFInfo
- Publication number
- EP2581175A1 EP2581175A1 EP12187073.7A EP12187073A EP2581175A1 EP 2581175 A1 EP2581175 A1 EP 2581175A1 EP 12187073 A EP12187073 A EP 12187073A EP 2581175 A1 EP2581175 A1 EP 2581175A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cord
- protector
- housing
- power
- clamp
- 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.)
- Granted
Links
- 230000001012 protector Effects 0.000 title claims abstract description 51
- 230000000153 supplemental effect Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
- H01R13/585—Grip increasing with strain force
Definitions
- the present disclosure relates to various improvements for power tools, and particularly to a cord set load protector.
- the power cord is installed in the tool housing with a small service loop, or extra length of cable, between the cord clamp and the portion of the tool housing that secures the cord protector.
- a crimp-on device is installed on the power cord cable next to the cord protector. When the cord is subjected to jerking, the cable moves axially relative to the cord protector. As the cable moves, the crimp-on device compresses the extended end of the cord protector absorbing energy and reducing the forces transmitted to the cord set conductors or connections that are disposed within the housing.
- an exemplary power tool 10 having a cord set load protector device 114 for preventing high forces imposed on a power cord 112 from impacting the connections of the cord 112 to the electrical power tool 10.
- the power tool 10 includes a cord 112 and a cord protector 114 extending from the rear end of the tool.
- the cord protector 114 is mounted within a recess 116 provided in the power tool housing 118.
- the recess 116 can be square or round in cross-section and defines a cavity therein for receiving a radially extending flange portion 120 of the elastomeric cord protector 114.
- the radial extending flange portion 120 is disposed against a shoulder portion 122.
- a crimp-on device 124 is clamped or crimped onto the power cord 112 and includes a radially extending flange portion 126 which is disposed against an end portion of the cord protector 114 inside of the chamber 116 of housing 118.
- the flange portion 126 is disposed against a radially inwardly extending shoulder 128 of the cavity 116 provided in the housing 118.
- the crimp-on device 124 engages the power cord so as to be axially and rotatably fixed to the power cord 112 in a manner that will be described in greater detail herein.
- the power cord 112 is also clamped to the tool housing by a cord clamp 130 provided within the power tool 10 in such a way that an extra cable length 112a is provided within the housing between the crimp-on device 124 and cord clamp 130.
- the cord clamp 130 can be mounted to the housing by fasteners 132 or by other known securing methods, such as rivets, welds, grommets, etc.
- the cord clamp 130 can be spaced from the recess 116 by up to several inches.
- Locating the cord clamp 130 further inward from the recess 116 improves cord flex durability by placing the cord stresses from the cord being flexed and the stresses on the cord due to the clamp at two different locations instead of both being generally at the same location. This improves the flex life of the conductors.
- the crimp-on device 124 can take-on many forms.
- the crimp-on device 124 can include a first clamp half 136 and a second clamp half 138.
- Each clamp half 136, 138 is provided with semicylindrical body portions 140 each provided with a plurality of radially inwardly extending ribs 142 designed to engage and clamp against the outer surface of the power cord 112.
- the first clamp half 136 is provided with a plurality of apertures 144 each adapted to receive a plurality of corresponding locking fingers 146 provided on the second clamp half 138.
- Each of the first and second clamp halves 136, 138 include radial flange portions 126a, 126b, respectively, which define the radially extending flange portion 126 of the crimp-on device 124.
- the locking fingers 146 secure the second clamp half 138 to the first clamp half 136 in a clamping engagement on the power cord 112 so as to prevent axial or rotational movement of the power cord 112 relative to the clamp device 124. It should be understood that other clamp or crimp-on arrangements can be utilized with the cord-set load protector 110, according to the principles of the present disclosure.
- an alternative cord set load protector 110' is shown including a split clamp device 124' received in a recess 302 within the handle section 300 to prevent the assembly from twisting or being pushed into the handle set.
- the split clamp 124' is independent of the handle set 300 and traps the complete cord set 112 and secondary wrap of filler strands.
- the cord protector 114' includes added material at the mounting end that prevents twist and creates a spring to absorb shock.
- cord set load protector 110 can comprise a spring lever assembly 400.
- spring lever assembly 400 can comprise a spring lever 402 and a cord clamp 130 fixedly coupled to spring lever 402 and power cord 112.
- spring lever 402 can be fixedly coupled to housing 118 via one or more retaining members 404 extending from housing 118. More particularly, spring lever 402 can comprise a plurality of corresponding mounting apertures 406 (see Figure 15 ) sized to receive retaining members 404 therethrough.
- retaining members 404 can be deformable, such as through heat staking or welding, to permanently retain spring lever 402 in a predetermined operable position (see Figure 14 ).
- Retaining members 404 can be spaced apart to define a plane extending between the centers thereof, wherein the plane is generally orthogonal to a longitudinal axis of power cord 112. Additionally, retaining member 404 can be a sleeve or slot formed in housing 118 for receiving and retaining an end of spring lever 402.
- cord set load protector 110 can comprise a cord clamp 408 fixedly coupled to spring lever 402.
- cord clamp 408 can comprise a pair of clamping members 410 adapted to be coupled together via fasteners 412 ( Figure 14 ).
- each clamping member 410 can comprise an enlarged aperture 414 for permitting a shank portion of fastener 412 to pass through and a threaded aperture 416 for threadedly engaging fastener 412.
- Each clamping member 410 can comprise a slot 418 formed therein to capture a side of spring lever 402 and a generally circular portion 420 to capture power cord 112.
- cord clamp 408 can be mounted on an end of spring lever 402 such that the slot 418 of each clamping member 410 engages a side of spring lever 402.
- power cord 112 can extend between clamping member 410.
- clamping members 410 Upon tightening of fasteners 412, clamping members 410 are drawn together to exert a clamping and retaining force on both spring lever 402 and power cord 112. In this manner, cord clamp 408 is fixedly coupled to power cord 112 for movement therewith.
- clamping members 410 are configured such that a single manufacturing piece can be used on opposing sides of spring lever 402.
- spring lever 402 can comprise a slotted end 422 for receiving power cord 112 therethrough.
- spring lever 402 During use, if sufficient force is applied to power cord 112, the associated force is transmitted through cord clamp 408 and against spring lever 402 to deflect spring lever 402 between a relaxed position ( Figures 8, 10 , 12 , and 14 ) and a deflected position ( Figures 9, 11 , and 13 ). This deflection provides force absorption along axis PC.
- the biasing force of spring lever 402 can be determined based upon, in part, the size and length of spring lever 402 and the material thereof. It should be understood, however, that in some embodiments additional biasing force may be desired. In such cases, a supplemental spring member 430 ( Figures 10 and 11 ) may be used disposed between cord clamp 408 and housing 118.
- Supplemental spring 430 can be a compression spring having either linear or progressive spring rates. Additionally, supplemental spring member 430 could include a coil spring, torsion spring, elastomeric member, or the like. Spring member 430 can be disposed coaxial with power cord 112 to maintain alignment of spring member 430 with power cord 112. It should be appreciated that spring member 430 can be used separate from spring lever 402, such as illustrated in FIGS. 17 and 18 .
- spring lever 402 can be pivotally coupled about an axis 450 for pivotal movement between a relaxed position ( Figure 12 ) and a deflected position ( Figure 13 ).
- a torsion spring 452 can be used for applying an opposing biasing force to power cord 112 when under load.
- a bellmouth 434 can be used to limit the deflection of power cord 112 exiting housing 118.
- Bellmouth 434 can comprise a generally linear body portion 436 and a curved exit 438 having an curved profile.
- Bellmouth 434 can be fixedly coupled to cord clamp 408 for movement therewith such that it moves together with cord clamp 408 when power cord 112 is under load.
- spring lever 402 can include features, materials, or employ other manufacturing techniques directed to tailoring a compliant response when under load (i.e. a biasing profile).
- spring lever 402 can comprise a molded or formed member having a cross-sectional shape that is non-planar and/or non-uniform. This cross-sectional shape can provide a nonlinear compliant response when under load to permit initial deflection under light loads and progressively less deflection under heavier loads.
- the housing 118 includes an internal labyrinth 450 that engages the cord set load protector 110.
- the cord 112 includes a cord jacket 452.
- the cord set load protector 110 engages and surrounds the cord jacket 452.
- the cord set load protector 110 extends from an interior space of the housing 118 through an opening 454 in the housing 118.
- the cord set load protector includes the supplemental spring member 430.
- the supplemental spring member 430 is adjacent to and abuts the cord clamp 408.
- the labyrinth 450 is positioned between the cord clamp 408 and the opening 454.
- the labyrinth 450 includes a first boss 456 that extends radially inward from a first portion of an interior surface of the housing 118 and a second boss 458 that extends radially inward from a second portion of the interior surface of the housing 118, the second portion being opposed to the first portion of the interior surface.
- the first boss 456 extends farther radially inward than the second boss 458.
- the cord set load protector 110 passes through the labyrinth 450. As the cord set load protector 110 passes through the labyrinth 450 a curve or bend 460 is created in the cord 112/cord jacket 452/cord load set protector 110.
- Figure 21 illustrates an additional cord protection feature.
- This embodiment may include an additional bend in the cord 112. Specifically, as the cord 112 extends past the cord clamp 408 towards the motor, a supplementary bend 462 is created in the cord 112 as the cord 112 is curved about the cord clamp 408. This additional bend creates a friction force between conductors of the cord 112 and the cord jacket 452. This frictional force prevents the conductors from being pulled through the cord jacket 452 when the load is applied to the cord 112, as noted above.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Harvester Elements (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
Description
- This application is a continuation in part of
U.S. Application NO. 12/164,621 filed on June 30, 2008 U.S. Application No. 11/860,989 filed on September 25, 2007 U.S. Provisional Application No. 60/863,467 filed on October 30, 2006 - The present disclosure relates to various improvements for power tools, and particularly to a cord set load protector.
- The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
- A common field failure with heavier portable power tools, such as portable saws, is a separation of the power cord from the tool due to an impulse load, or jerk, applied to the cord. This can occur when the tool is dropped while the plug end of the power cord is secured, or when a user carries the tool or lowers it from floor to floor or down a ladder by holding the power cord.
- To isolate the power cord conductors or connections from the high forces imposed by jerking the power cord, the power cord according to the present disclosure is installed in the tool housing with a small service loop, or extra length of cable, between the cord clamp and the portion of the tool housing that secures the cord protector. A crimp-on device is installed on the power cord cable next to the cord protector. When the cord is subjected to jerking, the cable moves axially relative to the cord protector. As the cable moves, the crimp-on device compresses the extended end of the cord protector absorbing energy and reducing the forces transmitted to the cord set conductors or connections that are disposed within the housing.
- Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.
-
Figure 1 is a perspective view of an exemplary worm drive saw with a tool hanger according to the principles of the present disclosure; -
Figure 2 is a cross-sectional view showing the cord set load protector according to the principles of the present disclosure, in an unloaded condition; -
Figure 3 is a view similar toFigure 2 with a load applied to the cord; -
Figure 4 is a perspective view of an exemplary cord clamp utilized with the cord set load protector according to the principles of the present disclosure; -
Figure 5 is a perspective view of a first clamp half; -
Figure 6 is a perspective view of a second clamp half; -
Figure 7 is a perspective view of an alternative cord set load protector design with the handle partially removed for illustrative purposes; -
Figure 8 is a front view of the cord set load protector design in an initial position according to some embodiments having a spring lever; -
Figure 9 is a front view of the cord set load protector design according toFigure 8 in a deflected position; -
Figure 10 is a front view of the cord set load protector design in an initial position according to some embodiments having a spring lever and supplemental spring; -
Figure 11 is a front view of the cord set load protector design according toFigure 10 in a deflected position; -
Figure 12 is a front view of the cord set load protector design in an initial position according to some embodiments having a spring lever and torsion spring; -
Figure 13 is a front view of the cord set load protector design according toFigure 12 in a deflected position; -
Figure 14 is a perspective view of a cord set load protector design according to some embodiments having a spring lever and cord clamp; -
Figure 15 is a perspective view of the spring lever; -
Figure 16 is a perspective view of cord clamp; -
Figure 17 is a front view of the cord set load protector design in an initial position according to some embodiments having a spring member; and -
Figure 18 is a front view of the cord set load protector design according toFigure 17 in a deflected position. -
Figure 19 is a side, partial sectional view of an alternate embodiment of a cord set load protector of the present invention. -
Figure 20 is a side, sectional view of the cord set load protector ofFigure 19 . -
Figure 21 is a top, sectional view of the cord set load protector ofFigure 19 . - The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
- With reference to
Figures 1 and2 , anexemplary power tool 10 is shown having a cord setload protector device 114 for preventing high forces imposed on apower cord 112 from impacting the connections of thecord 112 to theelectrical power tool 10. As illustrated inFigure 1 , thepower tool 10 includes acord 112 and acord protector 114 extending from the rear end of the tool. Thecord protector 114 is mounted within arecess 116 provided in thepower tool housing 118. Therecess 116 can be square or round in cross-section and defines a cavity therein for receiving a radially extendingflange portion 120 of theelastomeric cord protector 114. The radial extendingflange portion 120 is disposed against ashoulder portion 122. A crimp-ondevice 124 is clamped or crimped onto thepower cord 112 and includes a radially extendingflange portion 126 which is disposed against an end portion of thecord protector 114 inside of thechamber 116 ofhousing 118. Theflange portion 126 is disposed against a radially inwardly extendingshoulder 128 of thecavity 116 provided in thehousing 118. - The crimp-on
device 124 engages the power cord so as to be axially and rotatably fixed to thepower cord 112 in a manner that will be described in greater detail herein. Thepower cord 112 is also clamped to the tool housing by acord clamp 130 provided within thepower tool 10 in such a way that anextra cable length 112a is provided within the housing between the crimp-ondevice 124 andcord clamp 130. Thecord clamp 130 can be mounted to the housing byfasteners 132 or by other known securing methods, such as rivets, welds, grommets, etc. Thecord clamp 130 can be spaced from therecess 116 by up to several inches. Locating thecord clamp 130 further inward from therecess 116 improves cord flex durability by placing the cord stresses from the cord being flexed and the stresses on the cord due to the clamp at two different locations instead of both being generally at the same location. This improves the flex life of the conductors. - When a large force F is applied to the
power cord 112, as illustrated inFigure 3 , thepower cord 112 is pulled in the axial direction of the force F. The movement of thepower cord 112 relative to thehousing 118 causes the crimp-ondevice 124 to move axially relative to theshoulder portion 128 so that theflange portion 126 of crimp-ondevice 124 compresses theflange portion 120 ofcord protector 114, thereby absorbing the force exerted on thecord 112. The axial movement of the crimp-on device relative to thecord clamp 130 takes up some of theextra cable length 112a provided therebetween without exerting forces upon thecord clamp 130. - The crimp-on
device 124 can take-on many forms. By way of example, as illustrated inFigures 4 and6 , the crimp-ondevice 124 can include afirst clamp half 136 and asecond clamp half 138. Eachclamp half semicylindrical body portions 140 each provided with a plurality of radially inwardly extendingribs 142 designed to engage and clamp against the outer surface of thepower cord 112. Thefirst clamp half 136 is provided with a plurality ofapertures 144 each adapted to receive a plurality ofcorresponding locking fingers 146 provided on thesecond clamp half 138. Each of the first andsecond clamp halves radial flange portions flange portion 126 of the crimp-ondevice 124. Thelocking fingers 146 secure thesecond clamp half 138 to thefirst clamp half 136 in a clamping engagement on thepower cord 112 so as to prevent axial or rotational movement of thepower cord 112 relative to theclamp device 124. It should be understood that other clamp or crimp-on arrangements can be utilized with the cord-set load protector 110, according to the principles of the present disclosure. - With reference to
Figure 7 , an alternative cord set load protector 110' is shown including a split clamp device 124' received in arecess 302 within thehandle section 300 to prevent the assembly from twisting or being pushed into the handle set. The split clamp 124' is independent of the handle set 300 and traps the complete cord set 112 and secondary wrap of filler strands. The cord protector 114' includes added material at the mounting end that prevents twist and creates a spring to absorb shock. - In some embodiments, as illustrated in
Figures 8-16 , cordset load protector 110 can comprise aspring lever assembly 400. In some embodiments,spring lever assembly 400 can comprise aspring lever 402 and acord clamp 130 fixedly coupled tospring lever 402 andpower cord 112. As illustrated inFigures 8-14 ,spring lever 402 can be fixedly coupled tohousing 118 via one or more retainingmembers 404 extending fromhousing 118. More particularly,spring lever 402 can comprise a plurality of corresponding mounting apertures 406 (seeFigure 15 ) sized to receive retainingmembers 404 therethrough. In some embodiments, retainingmembers 404 can be deformable, such as through heat staking or welding, to permanently retainspring lever 402 in a predetermined operable position (seeFigure 14 ). Retainingmembers 404 can be spaced apart to define a plane extending between the centers thereof, wherein the plane is generally orthogonal to a longitudinal axis ofpower cord 112. Additionally, retainingmember 404 can be a sleeve or slot formed inhousing 118 for receiving and retaining an end ofspring lever 402. - In some embodiments, cord set
load protector 110 can comprise acord clamp 408 fixedly coupled tospring lever 402. In some embodiments, as illustrated inFigures 8-16 ,cord clamp 408 can comprise a pair of clampingmembers 410 adapted to be coupled together via fasteners 412 (Figure 14 ). Specifically, each clampingmember 410 can comprise anenlarged aperture 414 for permitting a shank portion offastener 412 to pass through and a threadedaperture 416 for threadedly engagingfastener 412. Each clampingmember 410 can comprise a slot 418 formed therein to capture a side ofspring lever 402 and a generally circular portion 420 to capturepower cord 112. In this manner,cord clamp 408 can be mounted on an end ofspring lever 402 such that the slot 418 of each clampingmember 410 engages a side ofspring lever 402. Similarly,power cord 112 can extend between clampingmember 410. Upon tightening offasteners 412, clampingmembers 410 are drawn together to exert a clamping and retaining force on bothspring lever 402 andpower cord 112. In this manner,cord clamp 408 is fixedly coupled topower cord 112 for movement therewith. It should be appreciated that clampingmembers 410 are configured such that a single manufacturing piece can be used on opposing sides ofspring lever 402. - With reference to
Figure 15 ,spring lever 402 can comprise a slottedend 422 for receivingpower cord 112 therethrough. - During use, if sufficient force is applied to
power cord 112, the associated force is transmitted throughcord clamp 408 and againstspring lever 402 to deflectspring lever 402 between a relaxed position (Figures 8, 10 ,12 , and14 ) and a deflected position (Figures 9, 11 , and13 ). This deflection provides force absorption along axis PC. The biasing force ofspring lever 402 can be determined based upon, in part, the size and length ofspring lever 402 and the material thereof. It should be understood, however, that in some embodiments additional biasing force may be desired. In such cases, a supplemental spring member 430 (Figures 10 and 11 ) may be used disposed betweencord clamp 408 andhousing 118.Supplemental spring 430 can be a compression spring having either linear or progressive spring rates. Additionally,supplemental spring member 430 could include a coil spring, torsion spring, elastomeric member, or the like.Spring member 430 can be disposed coaxial withpower cord 112 to maintain alignment ofspring member 430 withpower cord 112. It should be appreciated thatspring member 430 can be used separate fromspring lever 402, such as illustrated inFIGS. 17 and 18 . - In some embodiments, as illustrated in
Figures 12 and 13 ,spring lever 402 can be pivotally coupled about anaxis 450 for pivotal movement between a relaxed position (Figure 12 ) and a deflected position (Figure 13 ). In this embodiment, atorsion spring 452 can be used for applying an opposing biasing force topower cord 112 when under load. - In some embodiments, a
bellmouth 434 can be used to limit the deflection ofpower cord 112 exitinghousing 118.Bellmouth 434 can comprise a generallylinear body portion 436 and acurved exit 438 having an curved profile.Bellmouth 434 can be fixedly coupled tocord clamp 408 for movement therewith such that it moves together withcord clamp 408 whenpower cord 112 is under load. - It should be appreciated that
spring lever 402 can include features, materials, or employ other manufacturing techniques directed to tailoring a compliant response when under load (i.e. a biasing profile). For instance, in some embodiments,spring lever 402 can comprise a molded or formed member having a cross-sectional shape that is non-planar and/or non-uniform. This cross-sectional shape can provide a nonlinear compliant response when under load to permit initial deflection under light loads and progressively less deflection under heavier loads. - In an alternate embodiment illustrated in
Figures 19 - 20 , thehousing 118 includes aninternal labyrinth 450 that engages the cord setload protector 110. In this embodiment, thecord 112 includes acord jacket 452. The cord setload protector 110 engages and surrounds thecord jacket 452. The cord setload protector 110 extends from an interior space of thehousing 118 through an opening 454 in thehousing 118. In this exemplary embodiment, at an interior end of the cord setload protector 110 the cord set load protector includes thesupplemental spring member 430. In this embodiment, thesupplemental spring member 430 is adjacent to and abuts thecord clamp 408. In this embodiment, thelabyrinth 450 is positioned between thecord clamp 408 and the opening 454. Thelabyrinth 450 includes afirst boss 456 that extends radially inward from a first portion of an interior surface of thehousing 118 and asecond boss 458 that extends radially inward from a second portion of the interior surface of thehousing 118, the second portion being opposed to the first portion of the interior surface. Thefirst boss 456 extends farther radially inward than thesecond boss 458. The cord setload protector 110 passes through thelabyrinth 450. As the cord setload protector 110 passes through the labyrinth 450 a curve or bend 460 is created in thecord 112/cord jacket 452/cord load setprotector 110. As a result of the curve or bend 460 of the cord setload protector 110,cord 112 andcord jacket 452, when a load is applied to thecord 112 in a direction away from the housing118, a frictional force is developed between thecord jacket 452 and the cord setload protector 10. The frictional force prevents thecord jacket 452 from shearing at a point in which thecord jacket 452 enters thecord clamp 408. This results in improved protection for thecord 112. -
Figure 21 illustrates an additional cord protection feature. This embodiment may include an additional bend in thecord 112. Specifically, as thecord 112 extends past thecord clamp 408 towards the motor, asupplementary bend 462 is created in thecord 112 as thecord 112 is curved about thecord clamp 408. This additional bend creates a friction force between conductors of thecord 112 and thecord jacket 452. This frictional force prevents the conductors from being pulled through thecord jacket 452 when the load is applied to thecord 112, as noted above. - It should be appreciated from the foregoing that one or more of the disclosed embodiments can be used concurrently to provide improved tailoring of the biasing profile and increased cord protection.
Claims (2)
- A power tool, comprising:a tool body having a housing;a motor disposed in said housing;a power cord connected to said motor, the power cord having a cord jacket as an outer layer; anda cord protector operably engaging said power cord and surrounding the cord jacket, said housing including an internal labyrinth, the cord protector passing through the internal labyrinth such that a frictional force occurs between the cord protector and the cord jacket in response to a load being applied to the power cord.
- The power tool according to Claim 1, wherein said labyrinth includes a first boss on a first side of the cord protector, extending radially inward from an interior surface of the housing and engaging the cord protector and a second boss on a second, opposed side of the cord protector, extending radially inward from the interior surface of the housing and engaging the cord protector, the first boss extending farther radially inward than the second boss.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/270,757 US20120113571A1 (en) | 2006-10-30 | 2011-10-11 | Cord Protector for Power Tools |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2581175A1 true EP2581175A1 (en) | 2013-04-17 |
EP2581175B1 EP2581175B1 (en) | 2015-05-27 |
Family
ID=46970134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12187073.7A Active EP2581175B1 (en) | 2011-10-11 | 2012-10-03 | Cord protector for power tools |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2581175B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013000109A1 (en) * | 2013-01-05 | 2014-07-10 | Volkswagen Aktiengesellschaft | Device for fixing a pipe |
EP3152809B1 (en) * | 2014-06-04 | 2018-12-26 | Kostal Kontakt Systeme GmbH | Eletrical equipment |
DE102021134361A1 (en) | 2021-12-22 | 2023-06-22 | Festool Gmbh | Hand machine tool with a power supply connection |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4095043A (en) * | 1976-05-14 | 1978-06-13 | Graber-Rogg, Inc. | Enclosure with strain relief |
EP0842743A1 (en) * | 1996-11-19 | 1998-05-20 | Atlas Copco Tools Ab | Power wrench with a multi core cable connection means |
GB2355119A (en) * | 1999-10-06 | 2001-04-11 | Bosch Gmbh Robert | Electric power tool with cable intended to be wrapped around the tool housing |
DE20000230U1 (en) * | 2000-01-10 | 2001-05-23 | Robert Bosch Gmbh, 70469 Stuttgart | Electric hand machine tools, in particular angle grinders |
WO2001058647A1 (en) * | 2000-02-10 | 2001-08-16 | Robert Bosch Gmbh | Hand machine tool |
US20040166730A1 (en) * | 2002-03-12 | 2004-08-26 | Credo Technology Corporation | Extension cord retention and plug retention system |
EP2051337A2 (en) * | 2007-10-17 | 2009-04-22 | HILTI Aktiengesellschaft | Electrical manual tool machine with bend protection casing |
DE102008002616A1 (en) * | 2008-06-24 | 2009-12-31 | Robert Bosch Gmbh | Cable grommet for hand tool |
-
2012
- 2012-10-03 EP EP12187073.7A patent/EP2581175B1/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4095043A (en) * | 1976-05-14 | 1978-06-13 | Graber-Rogg, Inc. | Enclosure with strain relief |
EP0842743A1 (en) * | 1996-11-19 | 1998-05-20 | Atlas Copco Tools Ab | Power wrench with a multi core cable connection means |
GB2355119A (en) * | 1999-10-06 | 2001-04-11 | Bosch Gmbh Robert | Electric power tool with cable intended to be wrapped around the tool housing |
DE20000230U1 (en) * | 2000-01-10 | 2001-05-23 | Robert Bosch Gmbh, 70469 Stuttgart | Electric hand machine tools, in particular angle grinders |
WO2001058647A1 (en) * | 2000-02-10 | 2001-08-16 | Robert Bosch Gmbh | Hand machine tool |
US20040166730A1 (en) * | 2002-03-12 | 2004-08-26 | Credo Technology Corporation | Extension cord retention and plug retention system |
EP2051337A2 (en) * | 2007-10-17 | 2009-04-22 | HILTI Aktiengesellschaft | Electrical manual tool machine with bend protection casing |
DE102008002616A1 (en) * | 2008-06-24 | 2009-12-31 | Robert Bosch Gmbh | Cable grommet for hand tool |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013000109A1 (en) * | 2013-01-05 | 2014-07-10 | Volkswagen Aktiengesellschaft | Device for fixing a pipe |
EP3152809B1 (en) * | 2014-06-04 | 2018-12-26 | Kostal Kontakt Systeme GmbH | Eletrical equipment |
DE102021134361A1 (en) | 2021-12-22 | 2023-06-22 | Festool Gmbh | Hand machine tool with a power supply connection |
Also Published As
Publication number | Publication date |
---|---|
EP2581175B1 (en) | 2015-05-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10136722B1 (en) | Impact-absorbing tethering attachment | |
US8348695B2 (en) | Cord protector for power tools | |
US8035955B2 (en) | Cord protector for power tools | |
US7727003B2 (en) | Cord protector for power tools | |
EP2055417B1 (en) | Power tool | |
EP2301119B1 (en) | Cord protector for power tools | |
US6799642B2 (en) | vibration damper between two components | |
EP2581175B1 (en) | Cord protector for power tools | |
EP2656722B1 (en) | Rotary cutter for brush cutter | |
US20090039576A1 (en) | Auxiliary handle device | |
US20080054743A1 (en) | Anti-disengagement connect system for a power tool | |
US20120113571A1 (en) | Cord Protector for Power Tools | |
KR20160082709A (en) | Cable anchoring device | |
US9893440B2 (en) | Vertical type connecting terminal for storage battery | |
WO2013131677A1 (en) | Hand-machine tool device | |
CN111065829B (en) | Strip member assembly | |
JP2011189480A (en) | Working machine | |
JP5229564B2 (en) | Electric nailer | |
KR101769850B1 (en) | Vertical type Connecting Terminal for Storage Battery | |
KR102239486B1 (en) | Construction cable tray fixing device | |
EP4224021A1 (en) | Fastening apparatus for vehicle | |
CA2841699C (en) | Handle for a hand-operated striking tool, hand-operated striking tool and method for manufacturing a hand-operated striking tool | |
CN116075397A (en) | Hand-held electric power tool with rechargeable battery protection | |
KR20120005002U (en) | Band cable round cutting device | |
CN118061137A (en) | Hand-held electric tool |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
17P | Request for examination filed |
Effective date: 20130930 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B25F 5/02 20060101AFI20141120BHEP |
|
INTG | Intention to grant announced |
Effective date: 20141216 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 728577 Country of ref document: AT Kind code of ref document: T Effective date: 20150615 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602012007538 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 728577 Country of ref document: AT Kind code of ref document: T Effective date: 20150527 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150928 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150827 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20150527 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150828 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150927 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150827 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: RO Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150527 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602012007538 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
26N | No opposition filed |
Effective date: 20160301 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: LU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20151003 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20151031 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20151031 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20160630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20151102 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20151003 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20121003 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20150527 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20230817 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20230822 Year of fee payment: 12 |