CA2310206A1 - Hammer head having a deformable sriking surface - Google Patents
Hammer head having a deformable sriking surface Download PDFInfo
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- CA2310206A1 CA2310206A1 CA 2310206 CA2310206A CA2310206A1 CA 2310206 A1 CA2310206 A1 CA 2310206A1 CA 2310206 CA2310206 CA 2310206 CA 2310206 A CA2310206 A CA 2310206A CA 2310206 A1 CA2310206 A1 CA 2310206A1
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- handle
- rod
- plates
- plate
- hammer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G1/00—Handle constructions
- B25G1/01—Shock-absorbing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D1/00—Hand hammers; Hammer heads of special shape or materials
- B25D1/08—Hand hammers; Hammer heads of special shape or materials having deformable heads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
A hammer having a deformable main striking surface for striking an object while allowing the main striking surface to substantially conform to the outer contour of the object being struck.
The hammer includes a hammer head mounted to a handle. The hammer head includes a set of plates each having end peripheral edges. The end peripheral edges of adjacent plates together form the deformable main striking surface.
The plates are mounted so as to be slidable relative to each other within a predetermined plate sliding range.
The hammer head is preferably mounted to the handle so as to allow relative angular movement between the hammer head and the handle during hammering motions.
The hammer head is attached to the handle by an attachment rod loosely fitted within a handle channel. The clearance created between the attachment rod and the handle channel allows for the relative angular movement between the hammer head and the handle.
The hammer includes a hammer head mounted to a handle. The hammer head includes a set of plates each having end peripheral edges. The end peripheral edges of adjacent plates together form the deformable main striking surface.
The plates are mounted so as to be slidable relative to each other within a predetermined plate sliding range.
The hammer head is preferably mounted to the handle so as to allow relative angular movement between the hammer head and the handle during hammering motions.
The hammer head is attached to the handle by an attachment rod loosely fitted within a handle channel. The clearance created between the attachment rod and the handle channel allows for the relative angular movement between the hammer head and the handle.
Description
Patent Application o~
Georges-Aime Bergeron for:
HAMMER HEAD HAVING A DEFORMABLE STRIKING SURFACE
FIELD OF THE INVENTION:
The present invention relates to the general field of hammers and is particularly concerned with a hammer provided with a hammer head having a deformable striking surface.
BACKGROUND OF THE INVENTION:
The field of tools is replete with various hammer structures each including a head substantially at right angle to a handle and used for multiple purposes such as driving nails, chipping objects and the like.
In many trades and crafts specific hammer configuration are necessary for the efficient practice of the art.
One example amongst many of such particular trade is the field of welding. In the welding industry, waste material commonly referred to as slag is typically produced .../2 ' - 2 -proximate to a weld-line as a by-product of the welding process. This so-called slag must be removed quickly, with minimal interruption to the welder and without causing damage to the surfaces surrounding the weld.
One common method for removing slag from the weld area is a two-handed chipping and scraping operation utilizing a hammer and chisel.
During such an operation, the welder repeatedly aligns the chisel blade abutting a given section of often thick and strongly adhering slag and strikes the chisel head with the hammer.
A second method utilized either alternatively or in conjunction with the hammer and chisel method involves the use of a conventional chipping hammer. Such chipping hammer typically has a long handle and a curved head with a thick end and a chisel end.
The chisel hammer is repeatedly swung at the weld site, again in an attempt to chip away at the slag. Both the use of either a hammer and chisel combination or a dedicated conventional chipping hammer inherently present numerous disadvantages.
For example, when a hammer and a chisel combination is used, the two handed operation requires repeated exchange of tools and welder repositioning, thereby decreasing welder productivity.
.../3 Also inevitable chisel blade slippage and inaccurate blade realignment again inherent in a two handed operation often causes damage to the weld site and surrounding surfaces.
Furthermore, welds often extend into obstructed areas necessarily thwarting hammer and chisel access. This is further aggravated by welder left or right handedness.
Still further, the shock from inordinately repeated blows due to the inefficiency of this method causes unnecessary shock to the welder's hand and other body parts. The use of a conventional chipping hammer also inherently leads to the above mentioned disadvantages further compounded by the fact that the control of the hammer is extremely limited given the force of the blow required to remove slag.
Another major problem associated with conventional methods of removing slag using conventional chipping hammers or hammer and chisel combinations resides in that the surface to be impacted is often irregular.
Indeed, the slag typically presents a somewhat irregular contour which inherently further complicates the operation in at least two major aspects. First, since the slag outer contour is substantially irregular, it greatly increases the risks of having either the chisel or the hammer slip away from the slag during impact thus potentially causing material damage as well as potential human injury.
.../4 Second, since the slag contour is typically somewhat irregular, the contact between the striking surface of the hammer head and the slag is not evenly distributed.
The contacting force between the hammer head and the slag being uneven it creates localized high pressure points which may create stress concentrations in the weld ultimately weakening the latter.
Of course, the uneven distribution of the contacting force between the hammer head and the slag, metallic scales or other matter resting on the weld is further compounded in situations wherein the weld itself has a generally arcuate configuration such as for example a convex type weld or a concave-radiused crown.
There exists at least one other situation also in the field of welding wherein conventional welding tools have proven to be unsatisfactory. In certain situations, it is desirable to hammer the weld-line prior to its complete cooling. Indeed, in specific situations this reduces the risk of creating heat shrinkage stresses within the weld-line.
For example, when cast-iron is used for uniting steel components the latter being generally more ductile tends to shrink more than the cast-iron thus creating an inner shrinkage stress concentration that may eventually lead to a stress fracture.
The conventional method of reducing the heat shrinkage stress consists in lightly hammering the cast-iron prior to its solidification and thus prior to its full contraction.
.../5 The light hammering stretches the weld-line. In order to provide a uniform stretch again, proper mating between the hammer head and the weld-line is crucial. Since the weld-line may vary in shape, diameter and relief it is again highly desirable to obtain a hammer head having an integral means for conforming to the configuration of the surface being struck.
Accordingly, there exists a need for an improved hammer tool.
Advantages of the present invention include the fact that the proposed hammer tool is provided with a hammer head having a deformable striking surface that is adapted to substantially deform upon contact with an object so as to conform within a predetermined range to the contour of the contacted object. This reduces the risk of damaging the contacted object by creating local high pressure stresses and ensures an even distribution of the impacting pressure.
Furthermore, the proposed tool is specially designed so as to create an inertia effect about its striking head when in use.
Also, the proposed tool is less susceptible to being thwarted by obstructed and tight areas and is less affected by lack of dexterity.
Furthermore, the proposed tool is provided with shock absorbing features that reduce hand and bodily damage due to excessive repeated stress.
.../6 The proposed tool is specifically well adapted to effectively remove slag without damage to welding site. It is also well adapted to stress weld-lines in order to reduce inherent heat shrinkage stress within the weld-line.
Still further, the proposed tool is adapted to be manufactured using relatively simple and conventional forms of manufacturing so as to provide a tool that will be economically feasible, long lasting and relatively trouble free in operation.
.../7 Summary of the Invention:
In accordance with an embodiement of the invention there is provided a hammer having a deformable main striking surface for striking an object, the object having an object outer surface defining an object contour, the hammer comprising an elongated handle, the handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis; a hammer head attached to the handle adjacent the handle first longitudinal end, the hammer head including at least two plates, each of the plates having a generally elongated and flat configuration; each of the plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis; the plates being attached to the handle in side by side relationship relative to each other and with the plate longitudinal axis in a generally perpendicular relationship relative to the handle longitudinal axis;- an attachment means for attaching the hammer head to the handle, the attachment means allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis within a predetermined plate sliding range while preventing other movements of the plates relative to each other; whereby the first plate end peripheral edge of adjacent plates together form the deformable hammer main striking surface, the plates being adapted to slide relative to each other within the plate sliding range upon the main striking surface contacting the object outer surface so that the main striking surface substantially conforms to the object contour.
.../8 , _ g _ Preferably, the attachment means includes an elongated attachment rod extending from the handle first longitudinal end, the attachment rod having a rod external surface and defining both a rod diameter and a rod longitudinal axis; an attachment aperture extending through each of the plates, each of the attachment apertures having an aperture peripheral edge and defining an aperture diameter; the rod diameter being smaller then the aperture diameter thereby defining a plate aperture clearance between the rod external surface and each of the aperture peripheral edges, the plate aperture clearance allowing relative movement between the plates and the attachment rod within the plate sliding range; an alignment means for maintaining the plates in a predetermined axial position along the attachment rod and only allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis; whereby upon the main striking surface contacting the object outer surface the plate aperture clearances defined between the rod external surface and each of the aperture peripheral edges allow for each of the plates to move independently relative to the attachment rod and whereby the aperture peripheral edges provide limiting means for limiting the individual movement of the plates to the plate sliding range.
Conveniently, the plate side peripheral edges have a generally rectilinear configuration, each of the plate side peripheral edges being in a generally parallel relationship with a corresponding plate longitudinal axis;
the alignment means includes an abutment structure, the abutment structure being configured and sized for abuttingly and slidably contacting the plate side peripheral edges.
.../9 . - 9 -Preferably, the abutment structure includes a first abutment component, the first abutment component having a generally "U"-shaped cross-sectional configuration defining a first component base wall. and a pair of first component flanges extending perpendicularly therefrom, the first abutment component being provided with a first component mounting means for mounting the first abutment component on the attachment rod; a second abutment component, the second abutment component having a generally flat configuration defining a second component base wall and a pair of opposed second component flat peripheral edges, the second abutment component being provided with a second component mounting means for mounting the second abutment component on the attachment rod; the first and second abutment components being configured and sized such that when both mounted on the attachment rod with the distal section of each of the first component flanges attached to one of the second component flat peripheral edges and the plates sandwiched between the first and second component base walls, the first component flanges abuttingly and slidably contact the plate side peripheral edges.
Conveniently, the first component mounting means includes a first component aperture extending through the first component base wall, the first component aperture being configured and sized so as to be substantially fittingly slidable on the attachment rod; the second component mounting means includes a second component aperture extending through the second component base wall, the second component aperture being configured and sized so as to be substantially fittingly slidable on the attachment rod.
.../10 ~ - 10 -In one embodiment, each of the first plate end peripheral edges has a generally pointed configuration. In another embodiment, each of the first plate end peripheral edges has a generally jagged configuration. Preferably, the hammer head is further provided with an auxiliary striking surface, the auxiliary striking surface being defined by the second plate end peripheral edges of adjacent plates.
Conveniently, each of the plate side peripheral edges defines a generally centrally disposed rectilinear segment interposed between a first and a second beveled segment, the first beveled segment of both the side peripheral edges of each of the plates leading inwardly towards the first plate end peripheral edge and the first plate end peripheral edge having a generally pointed configuration, the second beveled segment of both the side peripheral edges of each of the plates leading inwardly towards the second plate end peripheral edge and the second plate end peripheral edge having a generally jagged configuration.
Preferably, the rod diameter has a value substantially in the range of three-eight of an inch and the aperture diameter has a value substantially in the range of one-half of an inch. Conveniently, each of the plate aperture clearance is filled with a resiliently deformable material. Preferably, the resiliently deformable material is an elastomeric resin.
Conveniently, the handle is provided with a handle longitudinal channel extending at least partially therethrough, the handle longitudinal channel defining a longitudinal .../11 channel diameter, the attachment rod being partially inserted within the handle longitudinal channel and protruding outwardly therefrom, the attachment rod being anchored in a predetermined position within the handle longitudinal channel by a rod anchoring means.
Preferably, the longitudinal channel diameter is greater then the rod diameter thereby creating a longitudinal channel clearance therebetween, the rod anchoring means preventing a relative axial displacement between the attachment rod and the handle in the direction of the rod longitudinal axis while allowing angular relative movement between the attachment rod and the handle within a predetermined angular motion range.
Conveniently, the rod anchoring means includes a rod transversal channel extending transversally through the attachment rod, the rod transversal channel being located at a section of the attachment rod inserted within the longitudinal channel, the rod transversal channel defining a rod transversal channel diameter;
a handle transversal channel extending transversally through the handle, the handle transversal channel being positioned substantially in register with the rod transversal channel, the handle transversal channel defining a handle transversal channel diameter; a locking pin inserted within both the rod transversal chamiel and the handle transversal channel, the locking pin having a configuration and size such that it is frictionally locked within the handle transversal channel while defining a transversal clearance between the locking pin and the handle transversal channel , the transversal clearance allowing relative angular movement of the attachment rod relative to the locking pin and relative to .../12 the handle. Preferably, the transversal clearance is filled with a transversal generally resilient deformable material. Conveniently, the transversal generally resilient deformable material is an elastomeric resin.
In accordance with the present invention, there is also provided a hammer having a deformable main striking surface for striking an object, the object having an object outer surface defining an object contour, the hammer comprising: an elongated handle, the handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis; a hammer head attached to the handle adjacent the handle first longitudinal end, the hammer head including at least two plates, each of the plates having a generally elongated and flat configuration; each of the plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis; the plates being attached to the handle in side by side relationship relative to each other and with the plate longitudinal axis in a generally perpendicular relationship relative to the handle longitudinal axis; an attachment means for attaching the hammer head to the handle, the attachment means allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis within a predetermined plate sliding range while preventing other movements of the plates relative to each other, the attachment means including an elongated attachment rod extending from the handle first longitudinal end; the attachment rod being pivotally attached to the handle so as to allow relative angular motion between the hammer head and the handle.
.../13 Preferably, the attachment rod has a rod external surface and defines both a rod diameter and a rod longitudinal axis; the attacment means further including an attachment aperture extending through each of the plates, each of the attachment apertures having an aperture peripheral edge and defining an aperture diameter; the rod diameter being smaller then the aperture diameter thereby defining a plate aperture clearance between the rod external surface and each of the aperture peripheral edges, the plate aperture clearance allowing relative movement between the plates and the attachment rod within the plate sliding range; an alignment means for maintaining the plates in a predetermined axial position along the attachment rod and only allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis.
.../14 BRIEF DESCRIPTION OF THE DRAWINGS:
An embodiment of the present invention will now be disclosed, by way of example, in reference to the following drawings in which:
FIGURE 1: in a perspective view, illustrates a hammer having a deformable head in accordance with an embodiment of the present invention.
FIGURE 2: in a partial elevational view with sections taken out, illustrates part of the hammer head shown in Figure 3;
FIGURE 3: in a partial side view with sections taken out, illustrates part of the hammer head shown in Figure 1;
FIGURE 4: in a longitudinal cross sectional view, illustrates the hammer shown in Figure 1 with its blades in a neutral position;
FIGURE 5: in a partial exploded view with sections taken out, illustrates part of the hammer shown in Figures 1 through 4.
.../15 DETAILED DESCRIPTION OF THE DRAWINGS:
Referring to Figure 1, there is shown a hammer 10 having deformable striking surface for striking an object 12.
Although the object 12 shown in Figure 1 schematically illustrates a welding line it should be understood that the hammer 10 could be used in many context without departing from the scope of the present invention. The object 12 has an outer surface 14 defining an object contour.
The hammer 10 has an elongated handle 16. The handle 16 defines a handle first longitudinal end 18, a handle second longitudinal end 20 and a handle longitudinal axis 22.
A hammer head 24 is attached to the handle 16 typically adjacent the handle first longitudinal end 18. The hammer head 24 include at least two (2) and preferably five (5) plates 26. Each of the plates 26 have a generally elongated and flat configuration.
As illustrated more specifically in Figure 5, each of the plates 26 defines a pair of generally smooth and opposed plate sliding surfaces 28, a pair of plate side peripheral edges 30, first and second plate end peripheral edges 32, 34 and a plate longitudinal axis 36.
.../16 ' - 16 -The plates 26 are attached to the handle 16 in a side by side relationship relative to each other to the plate sliding surfaces 28 of adjacent plates 26 in an abutting relationship relative to each other. The plates 26 are also attached to the handle 16 with their respective plate longitudinal axis 36 in a generally perpendicular relationship relative to the handle longitudinal axis 22.
An attachment means is provided for attaching the hammer head 24 to the handle 16. The attachment means allows the individual plates 26 to slide relative to each other in a direction generally parallel to the plate longitudinal axis 36 within a predetermined plate sliding range. Simultaneously, the attachment means prevents other movements of the plates 26 relative to each other.
In a preferred embodiment of the invention, the attachment means include an attachment rod 38 extending from the handle first longitudinal end 18. The attachment rod 38 has a rod external surface defining a rod external diameter 40. The attachment means also include an attachment aperture 42 extending through each of the plates 26.
Each of the attachment apertures 42 has an aperture peripheral edge defining an aperture diameter 44.
The rod diameter 40 being smaller than the aperture diameter 44, a plate aperture clearance is defined between the rod external surface and each of the aperture peripheral edges.
.../17 A plate aperture is indicated by the reference numeral 46 in Figure 4 allows relative movement between the plates 26 and the attachment rod 38 within the plate sliding range.
The attachment means typically also includes an aligrunent means for maintaining the plates 26 in a predetermined axial position along the attachment rod 38 and for also only allowing the plates 26 to slide relative to each other in a direction parallel to the plate longitudinal axis 36.
Preferably, the plate side peripheral edges 30 have a generally rectilinear configuration. Each of the plate side peripheral edges are typically in a generally parallel relationship with a corresponding plate longitudinal axis 36.
The alignment means typically includes an abutment structure. The abutment structure is configured and sized for abuttingly and slidably contacting the plate side peripheral edges 30.
Typically, the abutment structure include a first and a second abutment component 48, S0. The first abutment component 48 preferably has a generally "U"-shaped cross sectional configuration defining a first component base wall 52 and a pair of first component flanges 54 extending perpendicularly from peripheral edges thereof. A
first abutment mounting means for mounting the first abutment component, the attachment rod 38 is further provided. The i-lrst abutment component mounting means .../18 ' - 18 -preferably takes the form of a first component aperture 56 extending through the first component base wall 52. The first component aperture 56 is configured and sized so as to be substantially fittingly slidable on the attachment rod 38.
The second abutment component 50 has typically has a generally flat configuration defining a second component base wall 58 and a pair of opposed second component flat peripheral edges 60. The second component has a second component mounting means for mounting the second component to the attachment rod 38.
Preferably, the second component mounting means include a second component aperture 62 extending therethrough. The second component aperture 62 is configured and sized so as to be substantially fittingly slidable on the attachment rod 38.
The first and second abutment components are configured and sized such that when they are properly mounted on the attachment rod 38, the distal section of each of the first component flanges 54 is attached to one of the second component flat peripheral edges 60 and the plates 26 are sandwiched between the first and second component base walls 52, 58.
In such a position, the inner surface of the first component flanges abuttingly and slidably contacts the plate side peripheral edges 30.
The hammer head 24 may further be provided with an auxiliary striking surface.
.../19 The auxiliary striking surface is typically defined by the second plate end peripheral edges 34 of adjacent plates 26. In one embodiment of the invention, the first plate end peripheral edges have a generally pointed configuration while the second plate end peripheral edges 34 have a generally jagged configuration.
Typically, each of the plates side peripheral edges 30 defines a generally centrally disposed rectilinear segment interposed between a first and a second beveled segment.
The first beveled segment of both the side peripheral edges 30 of each plate leads inwardly towards the first plate end peripheral edge. In such circumstances, the first plate end peripheral edge of each plate 26 has a generally pointed configuration.
Also, the second beveled segment of both the side peripheral edges 30 of each plate 26 leads inwardly towards the second plate end peripheral edge 34 and the second plate end peripheral edge 24 has a generally jagged configuration.
Typically, although by no means exclusively, the rod diameter 40 has a value substantially in the range of 3/8", while the aperture diameter 44 has a value substantially in the range of 1/2".
Also, in one alternative embodiment of the invention, at least one and preferably all of the plates aperture clearances 46 are filled with a generally resilient deformable material. Typically, the resilient deformable material is an elastomeric resin. Typically, .../20 although by no means exclusively, the second component 50 is formed out of a conventional hexagonal type nut type component.
As shown in greater details in Figures 4 and 5, the handle 16 is preferably provided with the handle longitudinal channel 62 extending at least partially therethrough. The handle longitudinal channel 62 defines a longitudinal channel diameter.
The attachment rod 38 is preferably at least partially inserted within the handle longitudinal channel 62 and protrudes outwardly therefrom. The attachment rod 38 is anchored in a predetermined position within the handle longitudinal channel 62 by a rod anchoring means.
Typically, the longitudinal channel diameter is greater than the rod diameter thereby creating a longitudinal channel clearance 64 therebetween. The rod anchoring means is adapted to prevent a relative axial displacement between the attachment rod 38 and the handle 16 in the direction of the rod longitudinal axis 22 while allowing angular relative movement between the attachment rod 38 and the handle 16 within a predetermined angular motion range. The angular relative movement between the attachment rod 38 and the handle 16 is schematically illustrated by arrows LXVI in Figure 4.
.../21 The rod anchoring means typically includes a rod transversal channel 68 extending transversally through the attachment rod 38. The rod transversal channel 68 is located at a section of the attachment rod 38 inserted within the longitudinal channel 62. The rod transversal channel 68 defines a corresponding rod transversal channel diameter.
The rod anchoring means also typically includes a handle transversal channel extending transversally through the handle 16. The handle transversal channel 70 is positioned substantially in register with the rod transversal channel 68. The handle transversal channel 70 defines a corresponding handle transversal channel diameter.
The rod anchoring means typically further includes a locking pin 72 inserted within both the rod transversal channel 68 and the handle transversal channel 70. The locking pin 72 has a configuration and a side such that is frictionally locked within the handle transversal channel 70 while defining a transversal clearance between the external surface of the locking pin 72 and the handle transversal channel .
The transversal clearance is adapted to allow relative angular movement of the attachment rod 38 relative to the locking pin 72 and relative to the handle 16 as indicated by arrows LXVI in Figure 4.
Optionally the transversal clearance may be filled with a transversal generally resilient deformable material such as an elastomeric resin.
.../22 In use, the first plate end peripheral edge 32 of adjacent plates 26 together form the deformable hammer main striking surface. The plates 26 adapted to slide relative to each other as shown in Figure 4b, within the plate striking range upon the main striking surface contacting to object outer surface 14 by the main striking surface substantially conforms to the object contour. Upon the main striking surface contacting the object outer surface 14, the plate aperture clearances 46 defined between the rod external surface and each of the aperture peripheral edges allow for each of the plates 26 to move independently relative to the attachment rod 38. However, the aperture peripheral edges provide limiting means for limiting the individual movement of the plates 26 to the plate sliding range.
Upon the hammer handle being raised and lowered according to a conventional hammering motion, the inertia created by the hammer head 24 causes the attachment rod 38 to pivot according to arrow LXVI relative to the handle 16. The relative pivotal movement between the handle 16 and the combination of the attachment rod 38 and hammer head 24 attached thereto, reduces the amplitude of motion required on behalf of the intended user in order to obtain a given striking amplitude of the striking head 24. In other words, a small hammering motion imparted on the handle 16 will cause a greater hammering amplitude of the hammering head 24. Furthermore, this relative angular motion between the attachment rod 38 and the handle 16 reduces the stress on the hand of the intended user upon impact of the hammer head 24 on a given surface.
.../23 Optional resilient deformable material within the clearances 46 and the transversal clearance further cushion the impact and potentially improve ergonomical features of the hammer 10.
Georges-Aime Bergeron for:
HAMMER HEAD HAVING A DEFORMABLE STRIKING SURFACE
FIELD OF THE INVENTION:
The present invention relates to the general field of hammers and is particularly concerned with a hammer provided with a hammer head having a deformable striking surface.
BACKGROUND OF THE INVENTION:
The field of tools is replete with various hammer structures each including a head substantially at right angle to a handle and used for multiple purposes such as driving nails, chipping objects and the like.
In many trades and crafts specific hammer configuration are necessary for the efficient practice of the art.
One example amongst many of such particular trade is the field of welding. In the welding industry, waste material commonly referred to as slag is typically produced .../2 ' - 2 -proximate to a weld-line as a by-product of the welding process. This so-called slag must be removed quickly, with minimal interruption to the welder and without causing damage to the surfaces surrounding the weld.
One common method for removing slag from the weld area is a two-handed chipping and scraping operation utilizing a hammer and chisel.
During such an operation, the welder repeatedly aligns the chisel blade abutting a given section of often thick and strongly adhering slag and strikes the chisel head with the hammer.
A second method utilized either alternatively or in conjunction with the hammer and chisel method involves the use of a conventional chipping hammer. Such chipping hammer typically has a long handle and a curved head with a thick end and a chisel end.
The chisel hammer is repeatedly swung at the weld site, again in an attempt to chip away at the slag. Both the use of either a hammer and chisel combination or a dedicated conventional chipping hammer inherently present numerous disadvantages.
For example, when a hammer and a chisel combination is used, the two handed operation requires repeated exchange of tools and welder repositioning, thereby decreasing welder productivity.
.../3 Also inevitable chisel blade slippage and inaccurate blade realignment again inherent in a two handed operation often causes damage to the weld site and surrounding surfaces.
Furthermore, welds often extend into obstructed areas necessarily thwarting hammer and chisel access. This is further aggravated by welder left or right handedness.
Still further, the shock from inordinately repeated blows due to the inefficiency of this method causes unnecessary shock to the welder's hand and other body parts. The use of a conventional chipping hammer also inherently leads to the above mentioned disadvantages further compounded by the fact that the control of the hammer is extremely limited given the force of the blow required to remove slag.
Another major problem associated with conventional methods of removing slag using conventional chipping hammers or hammer and chisel combinations resides in that the surface to be impacted is often irregular.
Indeed, the slag typically presents a somewhat irregular contour which inherently further complicates the operation in at least two major aspects. First, since the slag outer contour is substantially irregular, it greatly increases the risks of having either the chisel or the hammer slip away from the slag during impact thus potentially causing material damage as well as potential human injury.
.../4 Second, since the slag contour is typically somewhat irregular, the contact between the striking surface of the hammer head and the slag is not evenly distributed.
The contacting force between the hammer head and the slag being uneven it creates localized high pressure points which may create stress concentrations in the weld ultimately weakening the latter.
Of course, the uneven distribution of the contacting force between the hammer head and the slag, metallic scales or other matter resting on the weld is further compounded in situations wherein the weld itself has a generally arcuate configuration such as for example a convex type weld or a concave-radiused crown.
There exists at least one other situation also in the field of welding wherein conventional welding tools have proven to be unsatisfactory. In certain situations, it is desirable to hammer the weld-line prior to its complete cooling. Indeed, in specific situations this reduces the risk of creating heat shrinkage stresses within the weld-line.
For example, when cast-iron is used for uniting steel components the latter being generally more ductile tends to shrink more than the cast-iron thus creating an inner shrinkage stress concentration that may eventually lead to a stress fracture.
The conventional method of reducing the heat shrinkage stress consists in lightly hammering the cast-iron prior to its solidification and thus prior to its full contraction.
.../5 The light hammering stretches the weld-line. In order to provide a uniform stretch again, proper mating between the hammer head and the weld-line is crucial. Since the weld-line may vary in shape, diameter and relief it is again highly desirable to obtain a hammer head having an integral means for conforming to the configuration of the surface being struck.
Accordingly, there exists a need for an improved hammer tool.
Advantages of the present invention include the fact that the proposed hammer tool is provided with a hammer head having a deformable striking surface that is adapted to substantially deform upon contact with an object so as to conform within a predetermined range to the contour of the contacted object. This reduces the risk of damaging the contacted object by creating local high pressure stresses and ensures an even distribution of the impacting pressure.
Furthermore, the proposed tool is specially designed so as to create an inertia effect about its striking head when in use.
Also, the proposed tool is less susceptible to being thwarted by obstructed and tight areas and is less affected by lack of dexterity.
Furthermore, the proposed tool is provided with shock absorbing features that reduce hand and bodily damage due to excessive repeated stress.
.../6 The proposed tool is specifically well adapted to effectively remove slag without damage to welding site. It is also well adapted to stress weld-lines in order to reduce inherent heat shrinkage stress within the weld-line.
Still further, the proposed tool is adapted to be manufactured using relatively simple and conventional forms of manufacturing so as to provide a tool that will be economically feasible, long lasting and relatively trouble free in operation.
.../7 Summary of the Invention:
In accordance with an embodiement of the invention there is provided a hammer having a deformable main striking surface for striking an object, the object having an object outer surface defining an object contour, the hammer comprising an elongated handle, the handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis; a hammer head attached to the handle adjacent the handle first longitudinal end, the hammer head including at least two plates, each of the plates having a generally elongated and flat configuration; each of the plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis; the plates being attached to the handle in side by side relationship relative to each other and with the plate longitudinal axis in a generally perpendicular relationship relative to the handle longitudinal axis;- an attachment means for attaching the hammer head to the handle, the attachment means allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis within a predetermined plate sliding range while preventing other movements of the plates relative to each other; whereby the first plate end peripheral edge of adjacent plates together form the deformable hammer main striking surface, the plates being adapted to slide relative to each other within the plate sliding range upon the main striking surface contacting the object outer surface so that the main striking surface substantially conforms to the object contour.
.../8 , _ g _ Preferably, the attachment means includes an elongated attachment rod extending from the handle first longitudinal end, the attachment rod having a rod external surface and defining both a rod diameter and a rod longitudinal axis; an attachment aperture extending through each of the plates, each of the attachment apertures having an aperture peripheral edge and defining an aperture diameter; the rod diameter being smaller then the aperture diameter thereby defining a plate aperture clearance between the rod external surface and each of the aperture peripheral edges, the plate aperture clearance allowing relative movement between the plates and the attachment rod within the plate sliding range; an alignment means for maintaining the plates in a predetermined axial position along the attachment rod and only allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis; whereby upon the main striking surface contacting the object outer surface the plate aperture clearances defined between the rod external surface and each of the aperture peripheral edges allow for each of the plates to move independently relative to the attachment rod and whereby the aperture peripheral edges provide limiting means for limiting the individual movement of the plates to the plate sliding range.
Conveniently, the plate side peripheral edges have a generally rectilinear configuration, each of the plate side peripheral edges being in a generally parallel relationship with a corresponding plate longitudinal axis;
the alignment means includes an abutment structure, the abutment structure being configured and sized for abuttingly and slidably contacting the plate side peripheral edges.
.../9 . - 9 -Preferably, the abutment structure includes a first abutment component, the first abutment component having a generally "U"-shaped cross-sectional configuration defining a first component base wall. and a pair of first component flanges extending perpendicularly therefrom, the first abutment component being provided with a first component mounting means for mounting the first abutment component on the attachment rod; a second abutment component, the second abutment component having a generally flat configuration defining a second component base wall and a pair of opposed second component flat peripheral edges, the second abutment component being provided with a second component mounting means for mounting the second abutment component on the attachment rod; the first and second abutment components being configured and sized such that when both mounted on the attachment rod with the distal section of each of the first component flanges attached to one of the second component flat peripheral edges and the plates sandwiched between the first and second component base walls, the first component flanges abuttingly and slidably contact the plate side peripheral edges.
Conveniently, the first component mounting means includes a first component aperture extending through the first component base wall, the first component aperture being configured and sized so as to be substantially fittingly slidable on the attachment rod; the second component mounting means includes a second component aperture extending through the second component base wall, the second component aperture being configured and sized so as to be substantially fittingly slidable on the attachment rod.
.../10 ~ - 10 -In one embodiment, each of the first plate end peripheral edges has a generally pointed configuration. In another embodiment, each of the first plate end peripheral edges has a generally jagged configuration. Preferably, the hammer head is further provided with an auxiliary striking surface, the auxiliary striking surface being defined by the second plate end peripheral edges of adjacent plates.
Conveniently, each of the plate side peripheral edges defines a generally centrally disposed rectilinear segment interposed between a first and a second beveled segment, the first beveled segment of both the side peripheral edges of each of the plates leading inwardly towards the first plate end peripheral edge and the first plate end peripheral edge having a generally pointed configuration, the second beveled segment of both the side peripheral edges of each of the plates leading inwardly towards the second plate end peripheral edge and the second plate end peripheral edge having a generally jagged configuration.
Preferably, the rod diameter has a value substantially in the range of three-eight of an inch and the aperture diameter has a value substantially in the range of one-half of an inch. Conveniently, each of the plate aperture clearance is filled with a resiliently deformable material. Preferably, the resiliently deformable material is an elastomeric resin.
Conveniently, the handle is provided with a handle longitudinal channel extending at least partially therethrough, the handle longitudinal channel defining a longitudinal .../11 channel diameter, the attachment rod being partially inserted within the handle longitudinal channel and protruding outwardly therefrom, the attachment rod being anchored in a predetermined position within the handle longitudinal channel by a rod anchoring means.
Preferably, the longitudinal channel diameter is greater then the rod diameter thereby creating a longitudinal channel clearance therebetween, the rod anchoring means preventing a relative axial displacement between the attachment rod and the handle in the direction of the rod longitudinal axis while allowing angular relative movement between the attachment rod and the handle within a predetermined angular motion range.
Conveniently, the rod anchoring means includes a rod transversal channel extending transversally through the attachment rod, the rod transversal channel being located at a section of the attachment rod inserted within the longitudinal channel, the rod transversal channel defining a rod transversal channel diameter;
a handle transversal channel extending transversally through the handle, the handle transversal channel being positioned substantially in register with the rod transversal channel, the handle transversal channel defining a handle transversal channel diameter; a locking pin inserted within both the rod transversal chamiel and the handle transversal channel, the locking pin having a configuration and size such that it is frictionally locked within the handle transversal channel while defining a transversal clearance between the locking pin and the handle transversal channel , the transversal clearance allowing relative angular movement of the attachment rod relative to the locking pin and relative to .../12 the handle. Preferably, the transversal clearance is filled with a transversal generally resilient deformable material. Conveniently, the transversal generally resilient deformable material is an elastomeric resin.
In accordance with the present invention, there is also provided a hammer having a deformable main striking surface for striking an object, the object having an object outer surface defining an object contour, the hammer comprising: an elongated handle, the handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis; a hammer head attached to the handle adjacent the handle first longitudinal end, the hammer head including at least two plates, each of the plates having a generally elongated and flat configuration; each of the plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis; the plates being attached to the handle in side by side relationship relative to each other and with the plate longitudinal axis in a generally perpendicular relationship relative to the handle longitudinal axis; an attachment means for attaching the hammer head to the handle, the attachment means allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis within a predetermined plate sliding range while preventing other movements of the plates relative to each other, the attachment means including an elongated attachment rod extending from the handle first longitudinal end; the attachment rod being pivotally attached to the handle so as to allow relative angular motion between the hammer head and the handle.
.../13 Preferably, the attachment rod has a rod external surface and defines both a rod diameter and a rod longitudinal axis; the attacment means further including an attachment aperture extending through each of the plates, each of the attachment apertures having an aperture peripheral edge and defining an aperture diameter; the rod diameter being smaller then the aperture diameter thereby defining a plate aperture clearance between the rod external surface and each of the aperture peripheral edges, the plate aperture clearance allowing relative movement between the plates and the attachment rod within the plate sliding range; an alignment means for maintaining the plates in a predetermined axial position along the attachment rod and only allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis.
.../14 BRIEF DESCRIPTION OF THE DRAWINGS:
An embodiment of the present invention will now be disclosed, by way of example, in reference to the following drawings in which:
FIGURE 1: in a perspective view, illustrates a hammer having a deformable head in accordance with an embodiment of the present invention.
FIGURE 2: in a partial elevational view with sections taken out, illustrates part of the hammer head shown in Figure 3;
FIGURE 3: in a partial side view with sections taken out, illustrates part of the hammer head shown in Figure 1;
FIGURE 4: in a longitudinal cross sectional view, illustrates the hammer shown in Figure 1 with its blades in a neutral position;
FIGURE 5: in a partial exploded view with sections taken out, illustrates part of the hammer shown in Figures 1 through 4.
.../15 DETAILED DESCRIPTION OF THE DRAWINGS:
Referring to Figure 1, there is shown a hammer 10 having deformable striking surface for striking an object 12.
Although the object 12 shown in Figure 1 schematically illustrates a welding line it should be understood that the hammer 10 could be used in many context without departing from the scope of the present invention. The object 12 has an outer surface 14 defining an object contour.
The hammer 10 has an elongated handle 16. The handle 16 defines a handle first longitudinal end 18, a handle second longitudinal end 20 and a handle longitudinal axis 22.
A hammer head 24 is attached to the handle 16 typically adjacent the handle first longitudinal end 18. The hammer head 24 include at least two (2) and preferably five (5) plates 26. Each of the plates 26 have a generally elongated and flat configuration.
As illustrated more specifically in Figure 5, each of the plates 26 defines a pair of generally smooth and opposed plate sliding surfaces 28, a pair of plate side peripheral edges 30, first and second plate end peripheral edges 32, 34 and a plate longitudinal axis 36.
.../16 ' - 16 -The plates 26 are attached to the handle 16 in a side by side relationship relative to each other to the plate sliding surfaces 28 of adjacent plates 26 in an abutting relationship relative to each other. The plates 26 are also attached to the handle 16 with their respective plate longitudinal axis 36 in a generally perpendicular relationship relative to the handle longitudinal axis 22.
An attachment means is provided for attaching the hammer head 24 to the handle 16. The attachment means allows the individual plates 26 to slide relative to each other in a direction generally parallel to the plate longitudinal axis 36 within a predetermined plate sliding range. Simultaneously, the attachment means prevents other movements of the plates 26 relative to each other.
In a preferred embodiment of the invention, the attachment means include an attachment rod 38 extending from the handle first longitudinal end 18. The attachment rod 38 has a rod external surface defining a rod external diameter 40. The attachment means also include an attachment aperture 42 extending through each of the plates 26.
Each of the attachment apertures 42 has an aperture peripheral edge defining an aperture diameter 44.
The rod diameter 40 being smaller than the aperture diameter 44, a plate aperture clearance is defined between the rod external surface and each of the aperture peripheral edges.
.../17 A plate aperture is indicated by the reference numeral 46 in Figure 4 allows relative movement between the plates 26 and the attachment rod 38 within the plate sliding range.
The attachment means typically also includes an aligrunent means for maintaining the plates 26 in a predetermined axial position along the attachment rod 38 and for also only allowing the plates 26 to slide relative to each other in a direction parallel to the plate longitudinal axis 36.
Preferably, the plate side peripheral edges 30 have a generally rectilinear configuration. Each of the plate side peripheral edges are typically in a generally parallel relationship with a corresponding plate longitudinal axis 36.
The alignment means typically includes an abutment structure. The abutment structure is configured and sized for abuttingly and slidably contacting the plate side peripheral edges 30.
Typically, the abutment structure include a first and a second abutment component 48, S0. The first abutment component 48 preferably has a generally "U"-shaped cross sectional configuration defining a first component base wall 52 and a pair of first component flanges 54 extending perpendicularly from peripheral edges thereof. A
first abutment mounting means for mounting the first abutment component, the attachment rod 38 is further provided. The i-lrst abutment component mounting means .../18 ' - 18 -preferably takes the form of a first component aperture 56 extending through the first component base wall 52. The first component aperture 56 is configured and sized so as to be substantially fittingly slidable on the attachment rod 38.
The second abutment component 50 has typically has a generally flat configuration defining a second component base wall 58 and a pair of opposed second component flat peripheral edges 60. The second component has a second component mounting means for mounting the second component to the attachment rod 38.
Preferably, the second component mounting means include a second component aperture 62 extending therethrough. The second component aperture 62 is configured and sized so as to be substantially fittingly slidable on the attachment rod 38.
The first and second abutment components are configured and sized such that when they are properly mounted on the attachment rod 38, the distal section of each of the first component flanges 54 is attached to one of the second component flat peripheral edges 60 and the plates 26 are sandwiched between the first and second component base walls 52, 58.
In such a position, the inner surface of the first component flanges abuttingly and slidably contacts the plate side peripheral edges 30.
The hammer head 24 may further be provided with an auxiliary striking surface.
.../19 The auxiliary striking surface is typically defined by the second plate end peripheral edges 34 of adjacent plates 26. In one embodiment of the invention, the first plate end peripheral edges have a generally pointed configuration while the second plate end peripheral edges 34 have a generally jagged configuration.
Typically, each of the plates side peripheral edges 30 defines a generally centrally disposed rectilinear segment interposed between a first and a second beveled segment.
The first beveled segment of both the side peripheral edges 30 of each plate leads inwardly towards the first plate end peripheral edge. In such circumstances, the first plate end peripheral edge of each plate 26 has a generally pointed configuration.
Also, the second beveled segment of both the side peripheral edges 30 of each plate 26 leads inwardly towards the second plate end peripheral edge 34 and the second plate end peripheral edge 24 has a generally jagged configuration.
Typically, although by no means exclusively, the rod diameter 40 has a value substantially in the range of 3/8", while the aperture diameter 44 has a value substantially in the range of 1/2".
Also, in one alternative embodiment of the invention, at least one and preferably all of the plates aperture clearances 46 are filled with a generally resilient deformable material. Typically, the resilient deformable material is an elastomeric resin. Typically, .../20 although by no means exclusively, the second component 50 is formed out of a conventional hexagonal type nut type component.
As shown in greater details in Figures 4 and 5, the handle 16 is preferably provided with the handle longitudinal channel 62 extending at least partially therethrough. The handle longitudinal channel 62 defines a longitudinal channel diameter.
The attachment rod 38 is preferably at least partially inserted within the handle longitudinal channel 62 and protrudes outwardly therefrom. The attachment rod 38 is anchored in a predetermined position within the handle longitudinal channel 62 by a rod anchoring means.
Typically, the longitudinal channel diameter is greater than the rod diameter thereby creating a longitudinal channel clearance 64 therebetween. The rod anchoring means is adapted to prevent a relative axial displacement between the attachment rod 38 and the handle 16 in the direction of the rod longitudinal axis 22 while allowing angular relative movement between the attachment rod 38 and the handle 16 within a predetermined angular motion range. The angular relative movement between the attachment rod 38 and the handle 16 is schematically illustrated by arrows LXVI in Figure 4.
.../21 The rod anchoring means typically includes a rod transversal channel 68 extending transversally through the attachment rod 38. The rod transversal channel 68 is located at a section of the attachment rod 38 inserted within the longitudinal channel 62. The rod transversal channel 68 defines a corresponding rod transversal channel diameter.
The rod anchoring means also typically includes a handle transversal channel extending transversally through the handle 16. The handle transversal channel 70 is positioned substantially in register with the rod transversal channel 68. The handle transversal channel 70 defines a corresponding handle transversal channel diameter.
The rod anchoring means typically further includes a locking pin 72 inserted within both the rod transversal channel 68 and the handle transversal channel 70. The locking pin 72 has a configuration and a side such that is frictionally locked within the handle transversal channel 70 while defining a transversal clearance between the external surface of the locking pin 72 and the handle transversal channel .
The transversal clearance is adapted to allow relative angular movement of the attachment rod 38 relative to the locking pin 72 and relative to the handle 16 as indicated by arrows LXVI in Figure 4.
Optionally the transversal clearance may be filled with a transversal generally resilient deformable material such as an elastomeric resin.
.../22 In use, the first plate end peripheral edge 32 of adjacent plates 26 together form the deformable hammer main striking surface. The plates 26 adapted to slide relative to each other as shown in Figure 4b, within the plate striking range upon the main striking surface contacting to object outer surface 14 by the main striking surface substantially conforms to the object contour. Upon the main striking surface contacting the object outer surface 14, the plate aperture clearances 46 defined between the rod external surface and each of the aperture peripheral edges allow for each of the plates 26 to move independently relative to the attachment rod 38. However, the aperture peripheral edges provide limiting means for limiting the individual movement of the plates 26 to the plate sliding range.
Upon the hammer handle being raised and lowered according to a conventional hammering motion, the inertia created by the hammer head 24 causes the attachment rod 38 to pivot according to arrow LXVI relative to the handle 16. The relative pivotal movement between the handle 16 and the combination of the attachment rod 38 and hammer head 24 attached thereto, reduces the amplitude of motion required on behalf of the intended user in order to obtain a given striking amplitude of the striking head 24. In other words, a small hammering motion imparted on the handle 16 will cause a greater hammering amplitude of the hammering head 24. Furthermore, this relative angular motion between the attachment rod 38 and the handle 16 reduces the stress on the hand of the intended user upon impact of the hammer head 24 on a given surface.
.../23 Optional resilient deformable material within the clearances 46 and the transversal clearance further cushion the impact and potentially improve ergonomical features of the hammer 10.
Claims (20)
1. A hammer having a deformable main striking surface for striking an object, said object having an object outer surface defining an object contour, said hammer comprising:
- an elongated handle, said handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis;
- a hammer head attached to said handle adjacent said handle first longitudinal end, said hammer head including at least two plates, each of said plates having a generally elongated and flat configuration; each of said plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis;
- said plates being attached to said handle in side by side relationship relative to each other and with said plate longitudinal axis in a generally perpendicular relationship relative to said handle longitudinal axis;
- an attachment means for attaching said hammer head to said handle, said attachment means allowing said plates to slide relative to each other in a direction parallel to said plate longitudinal axis within a predetermined plate sliding range while preventing other movements of said plates relative to each other;
whereby the first plate end peripheral edge of adjacent plates together form said deformable hammer main striking surface, said plates being adapted to slide relative to each other within said plate sliding range upon said main striking surface contacting said object outer surface so that said main striking surface substantially conforms to said object contour.
- an elongated handle, said handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis;
- a hammer head attached to said handle adjacent said handle first longitudinal end, said hammer head including at least two plates, each of said plates having a generally elongated and flat configuration; each of said plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis;
- said plates being attached to said handle in side by side relationship relative to each other and with said plate longitudinal axis in a generally perpendicular relationship relative to said handle longitudinal axis;
- an attachment means for attaching said hammer head to said handle, said attachment means allowing said plates to slide relative to each other in a direction parallel to said plate longitudinal axis within a predetermined plate sliding range while preventing other movements of said plates relative to each other;
whereby the first plate end peripheral edge of adjacent plates together form said deformable hammer main striking surface, said plates being adapted to slide relative to each other within said plate sliding range upon said main striking surface contacting said object outer surface so that said main striking surface substantially conforms to said object contour.
2. A hammer as recited in claim 1 wherein said attachment means includes - an elongated attachment rod extending from said handle first longitudinal end, said attachment rod having a rod external surface and defining both a rod diameter and a rod longitudinal axis;
- an attachment aperture extending through each of said plates, each of said attachment apertures having an aperture peripheral edge and defining an aperture diameter;
- said rod diameter being smaller then said aperture diameter thereby defining a plate aperture clearance between said rod external surface and each of said aperture peripheral edges, said plate aperture clearance allowing relative movement between said plates and said attachment rod within said plate sliding range;
- an alignment means for maintaining said plates in a predetermined axial position along said attachment rod and only allowing said plates to slide relative to each other in a direction parallel to said plate longitudinal axis;
whereby upon said main striking surface contacting said object outer surface said plate aperture clearances defined between said rod external surface and each of said aperture peripheral edges allow for each of said plates to move independently relative to said attachment rod and whereby said aperture peripheral edges provide limiting means for limiting the individual movement of said plates to said plate sliding range.
- an attachment aperture extending through each of said plates, each of said attachment apertures having an aperture peripheral edge and defining an aperture diameter;
- said rod diameter being smaller then said aperture diameter thereby defining a plate aperture clearance between said rod external surface and each of said aperture peripheral edges, said plate aperture clearance allowing relative movement between said plates and said attachment rod within said plate sliding range;
- an alignment means for maintaining said plates in a predetermined axial position along said attachment rod and only allowing said plates to slide relative to each other in a direction parallel to said plate longitudinal axis;
whereby upon said main striking surface contacting said object outer surface said plate aperture clearances defined between said rod external surface and each of said aperture peripheral edges allow for each of said plates to move independently relative to said attachment rod and whereby said aperture peripheral edges provide limiting means for limiting the individual movement of said plates to said plate sliding range.
3. A hammer as recited in claim 2 wherein - said plate side peripheral edges have a generally rectilinear configuration, each of said plate side peripheral edges being in a generally parallel relationship with a corresponding plate longitudinal axis;
- said alignment means includes an abutment structure, said abutment structure being configured and sized for abuttingly and slidably contacting said plate side peripheral edges.
- said alignment means includes an abutment structure, said abutment structure being configured and sized for abuttingly and slidably contacting said plate side peripheral edges.
4. A hammer as recited in claim 3 wherein said abutment structure includes - a first abutment component, said first abutment component having a generally "U"-shaped cross-sectional configuration defining a first component base wall and a pair of first component flanges extending perpendicularly therefrom, said first abutment component being provided with a first component mounting means for mounting said first abutment component on said attachment rod;
- a second abutment component, said second abutment component having a generally flat configuration defining a second component base wall and a pair of opposed second component flat peripheral edges, said second abutment component being provided with a second component mounting means for mounting said second abutment component on said attachment rod;
- said first and second abutment components being configured and sized such that when both mounted on said attachment rod with the distal section of each of said first component flanges attached to one of said second component flat peripheral edges and said plates sandwiched between said first and second component base walls, said first component flanges abuttingly and slidably contact said plate side peripheral edges.
- a second abutment component, said second abutment component having a generally flat configuration defining a second component base wall and a pair of opposed second component flat peripheral edges, said second abutment component being provided with a second component mounting means for mounting said second abutment component on said attachment rod;
- said first and second abutment components being configured and sized such that when both mounted on said attachment rod with the distal section of each of said first component flanges attached to one of said second component flat peripheral edges and said plates sandwiched between said first and second component base walls, said first component flanges abuttingly and slidably contact said plate side peripheral edges.
5. A hammer as recited in claim 4 wherein - said first component mounting means includes a first component aperture extending through said first component base wall, said first component aperture being configured and sized so as to be substantially fittingly slidable on said attachment rod;
- said second component mounting means includes a second component aperture extending through said second component base wall, said second component aperture being configured and sized so as to be substantially fittingly slidable on said attachment rod.
- said second component mounting means includes a second component aperture extending through said second component base wall, said second component aperture being configured and sized so as to be substantially fittingly slidable on said attachment rod.
6. A hammer as recited in claim 1 wherein each of said first plate end peripheral edges has a generally pointed configuration.
7. A hammer as recited in claim 1 wherein each of said first plate end peripheral edges has a generally jagged configuration.
8. A hammer as recited in claim 1 wherein said hammer head is further provided with an auxiliary striking surface, said auxiliary striking surface being defined by the second plate end peripheral edges of adjacent plates.
9. A hammer as recited in claim 8 wherein each of said plate side peripheral edges defines a generally centrally disposed rectilinear segment interposed between a first and a second beveled segment, said first beveled segment of both said side peripheral edges of each of said plates leading inwardly towards said first plate end peripheral edge and said first plate end peripheral edge having a generally pointed configuration, said second beveled segment of both said side peripheral edges of each of said plates leading inwardly towards said second plate end peripheral edge and said second plate end peripheral edge having a generally jagged configuration.
10. A hammer as recited in claim 2 wherein said rod diameter has a value substantially in the range of three-eight of an inch and said aperture diameter has a value substantially in the range of one-half of an inch.
11. A hammer as recited in claim 2 wherein each of said plate aperture clearance is filled with a resiliently deformable material.
12. A hammer as recited in claim 11 wherein said resiliently deformable material is an elastomeric resin.
13. A hammer as recited in claim 2 wherein said handle is provided with a handle longitudinal channel extending at least partially therethrough, said handle longitudinal channel defining a longitudinal channel diameter, said attachment rod being partially inserted within said handle longitudinal channel and protruding outwardly therefrom, said attachment rod being anchored in a predetermined position within said handle longitudinal channel by a rod anchoring means.
14. A hammer as recited in claim 13 wherein said longitudinal channel diameter is greater then said rod diameter thereby creating a longitudinal channel clearance therebetween, said rod anchoring means preventing a relative axial displacement between said attachment rod and said handle in the direction of said rod longitudinal axis while allowing angular relative movement between said attachment rod and said handle within a predetermined angular motion range.
15. A hammer as recited in claim 14 wherein said rod anchoring means includes - a rod transversal channel extending transversally through said attachment rod, said rod transversal channel being located at a section of said attachment rod inserted within said longitudinal channel, said rod transversal channel defining a rod transversal channel diameter;
- a handle transversal channel extending transversally through said handle, said handle transversal channel being positioned substantially in register with said rod transversal channel, said handle transversal channel defining a handle transversal channel diameter;
- a locking pin inserted within both said rod transversal channel and said handle transversal channel, said locking pin having a configuration and size such that it is frictionally locked within said handle transversal channel while defining a transversal clearance between said locking pin and said handle transversal channel , said transversal clearance allowing relative angular movement of said attachment rod relative to said locking pin and relative to said handle.
- a handle transversal channel extending transversally through said handle, said handle transversal channel being positioned substantially in register with said rod transversal channel, said handle transversal channel defining a handle transversal channel diameter;
- a locking pin inserted within both said rod transversal channel and said handle transversal channel, said locking pin having a configuration and size such that it is frictionally locked within said handle transversal channel while defining a transversal clearance between said locking pin and said handle transversal channel , said transversal clearance allowing relative angular movement of said attachment rod relative to said locking pin and relative to said handle.
16. A hammer as recited in claim 15 wherein said transversal clearance is filled with a transversal generally resilient deformable material.
17. A hammer as recited in claim 16 wherein said transversal generally resilient deformable material is an elastomeric resin.
18. A hammer having a deformable main striking surface for striking an object, said object having an object outer surface defining an object contour, said hammer comprising:
- an elongated handle, said handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis;
- a hammer head attached to said handle adjacent said handle first longitudinal end, said hammer head including at least two plates, each of said plates having a generally elongated and flat configuration; each of said plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis;
- said plates being attached to said handle in side by side relationship relative to each other and with said plate longitudinal axis in a generally perpendicular relationship relative to said handle longitudinal axis;
- an attachment means for attaching said hammer head to said handle, said attachment means allowing said plates to slide relative to each other in a direction parallel to said plate longitudinal axis within a predetermined plate sliding range while preventing other movements of said plates relative to each other, said attachment means including an elongated attachment rod extending from said handle first longitudinal end;
- said attachment rod being pivotally attached to said handle so as to allow relative angular motion between said hammer head and said handle.
- an elongated handle, said handle defining a handle first longitudinal end, a handle second longitudinal end and a handle longitudinal axis;
- a hammer head attached to said handle adjacent said handle first longitudinal end, said hammer head including at least two plates, each of said plates having a generally elongated and flat configuration; each of said plates defining a pair of opposed and generally smooth plate sliding surfaces, a pair of plate side peripheral edges, first and second plate end peripheral edges and a plate longitudinal axis;
- said plates being attached to said handle in side by side relationship relative to each other and with said plate longitudinal axis in a generally perpendicular relationship relative to said handle longitudinal axis;
- an attachment means for attaching said hammer head to said handle, said attachment means allowing said plates to slide relative to each other in a direction parallel to said plate longitudinal axis within a predetermined plate sliding range while preventing other movements of said plates relative to each other, said attachment means including an elongated attachment rod extending from said handle first longitudinal end;
- said attachment rod being pivotally attached to said handle so as to allow relative angular motion between said hammer head and said handle.
19. A hammer as recited inclaim 18 wherein said attachment rod has a rod external surface and defines both a rod diameter and a rod longitudinal axis; said attacment means further including an attachment aperture extending through each of said plates, each of said attachment apertures having an aperture peripheral edge and defining an aperture diameter; said rod diameter being smaller then said aperture diameter thereby defining a plate aperture clearance between said rod external surface and each of said aperture peripheral edges, said plate aperture clearance allowing relative movement between said plates and said attachment rod within said plate sliding range; an alignment means for maintaining said plates in a predetermined axial position along said attachment rod and only allowing said plates to slide relative to each other in a direction parallel to said plate longitudinal axis.
20. Preferably, the attachment rod has a rod external surface and defines both a rod diameter and a rod longitudinal axis; the attacment means further including an attachment aperture extending through each of the plates, each of the attachment apertures having an aperture peripheral edge and defining an aperture diameter; the rod diameter being smaller then the aperture diameter thereby defining a plate aperture clearance between the rod external surface and each of the aperture peripheral edges, the plate aperture clearance allowing relative movement between the plates and the attachment rod within the plate sliding range; an alignment means for maintaining the plates in a predetermined axial position along the attachment rod and only allowing the plates to slide relative to each other in a direction parallel to the plate longitudinal axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2310206 CA2310206A1 (en) | 2000-05-24 | 2000-05-24 | Hammer head having a deformable sriking surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2310206 CA2310206A1 (en) | 2000-05-24 | 2000-05-24 | Hammer head having a deformable sriking surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2310206A1 true CA2310206A1 (en) | 2001-11-24 |
Family
ID=4166327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2310206 Abandoned CA2310206A1 (en) | 2000-05-24 | 2000-05-24 | Hammer head having a deformable sriking surface |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2310206A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496828A (en) * | 2019-09-06 | 2019-11-26 | 中冶赛迪重庆信息技术有限公司 | Using cold and hot deformation difference from broken shell descaling method, device and crust-breaking chips |
-
2000
- 2000-05-24 CA CA 2310206 patent/CA2310206A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110496828A (en) * | 2019-09-06 | 2019-11-26 | 中冶赛迪重庆信息技术有限公司 | Using cold and hot deformation difference from broken shell descaling method, device and crust-breaking chips |
| CN110496828B (en) * | 2019-09-06 | 2023-08-15 | 中冶赛迪信息技术(重庆)有限公司 | Method and device for removing scale by utilizing cold and hot deformation variation and crust breaking hammer |
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