Information
-
Patent Grant
-
6807961
-
Patent Number
6,807,961
-
Date Filed
Monday, March 17, 200321 years ago
-
Date Issued
Tuesday, October 26, 200420 years ago
-
Inventors
-
-
Examiners
- Hail, III; Joseph J.
- Ojini; Anthony
Agents
-
CPC
-
US Classifications
Field of Search
US
- 125 23
- 030 191
- 030 192
- 030 245
- 030 252
- 072 40911
- 081 355
-
International Classifications
-
Abstract
A marble and granite nipping tool that includes a pair of blade support plates as blade mounting ends whereto nipping blades having opposing nipping edges are releasably mounted and provides for setting a selected opposing nipping edge spacing to allow a use of the tool on different widths or thicknesses of marble and granite slabs, for removing or nipping off edge sections thereof. The tool includes a linkage consisting of lever arms secured at lever arm ends to the blade support plates undersurfaces that connect, in turn, through a pivot coupling to scissoring arms that and operated to provide a mechanical advantage to multiply a closure force directed through the scissoring arms and linkage and into the blade support plates for facilitating the removal of marble and granite edge sections. Which scissoring arms can, in one embodiment, be manually closed by an operator moving ends of the arms together, and, in another embodiment, by operation of a an automated scissoring arm closure arrangement.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to tools for use in is removal of chips or sections of an edge of a granite or marble counter or sink top for providing a decorative edge surface.
2. Prior Art
Nipping tools for use in shaping an edge of a section of tile, or the like, are, of course, well known and examples of such devices are shown in U.S. Patents to: Jencks U.S. Pat. No. 298,587 and to Yang Yu U.S. Pat. No. 5,365,915, with other nipping tools shown in Uhlmann U.S. Pat. No. 4,130,938 and Herckelbout, U.S. Pat. No. 2,677,177, that are for, respectively, nipping animal hooves and as cutting pliers. None of which tools provide, as does the invention, for adjustable positioning of the jaws of the tool relative to opposing cutting edges for controlling the spacing between which cutting edges.
Additional to providing a capability for adjustment of the spacing distance between the edges of the opposing blades, the invention includes lever arms that provide a mechanical advantage to an operator to close the blades together. Such lever arm arrangements for closing blades together, have been employed for cutting through objects such as nails, bolts or the like, but have not been applied to nipping tools. Some examples of such cutting tools where the handles thereof are arranged to afford an operator with a mechanical advantage to move the tool handles together are shown in Porter, U.S. Design Pat. No. 50,029 and in Handy, U.S. Pat. No. 63,721; to Carolus, U.S. Pat. No. 710,182; to King, U.S. Pat. No. 157,610; to Porter, U.S. Pat. No. 1,613,480; to Chang, U.S. Pat. No. 4,910,870; to Deville, U.S. Pat. No. 5,898,998 and to Jansson, U.S. Pat. No. 6,226,874, and an example of a bolt cutter that, in lieu of manually operated scissoring arms, employs a pneumatic or hydraulic operated piston arrangement operated to urge scissor arms together to close tool jaws, is shown in a Helwig, U.S. Pat. No. 596,066.
Where, per the above cited art, scissoring arms that are closed together for closing opposing jaws for cutting a bolt, rod, or the like, are well know, as are nippers with fixed cutting edges to cutting tile, or the like. None of the art, however, show a granite or marble edge nipping tool with movable opposing jaws for pinching or nipping off sections of different thicknesses of marble or granite sink and counter tops. Nor does the earlier art show nipping or chipping devices where the opposing cutting edges spacing distance is adjustable and which set distance can be maintained in place for nipping or chipping a selected width of granite or marble counter or sink top to provide a desired finished decorative edge surface.
SUMMARY OF THE INVENTION
It is a principal object of the present invention to provide a nipping and chipping tool that is suitable for removing edge sections of a granite or marble sink or counter top, providing a decorative edge surface.
Another object of the present invention is to provide a nipping and chipping tool that is suitable for use with granite or marble counter or sink tops of different widths.
Another object of the present invention is to provide a nipping and chipping tool that takes the place of what has formerly been a manual operation involving an operator working with a hammer and chisel to chip off sections of an edge of a section of marble or granite, for forming a decorative edge.
Still another object of the present invention is to provide a chipping and nipping tool that includes scissoring arms that are linked to opposing jaws such that, when the arms are manually or mechanically operated to close together, the opposing jaws will also be closed together.
Still another object of the present invention is to provide a linkage between the scissoring arms and opposing jaws where a mechanical advantage exists such that a force of closing the scissoring arms together is increased at the opposing jaws, closing the jaws together.
Still another object of the present invention is to provide a nipping and chipping tool that is easily and efficiently operated to provide a controlled removal of sections of a granite or marble counter or sink top edge.
The invention in a nipping and cutting tool that is for chipping or nipping off sections of a marble or granite counter top edge to provide a decorative surface thereto, and is an improvement over earlier practices an operator, using a hammer and chisel, chips off sections of a marble or granite counter top edge.
The invention provides a pair of opposing blade support plates that each receive a blade fitted thereto that if formed to allow for individual blade movement relative to one another for altering blade edge spacing distance. The selected blade edge spacing to provide a nipping action to a particular thickness of granite or marble edge, allowing the tool to be used on different widths or thicknesses of marble or granite counter top, producing a desired decorative edge. Further, the opposing blades are operated through a linkage and include scissoring arms whereby, an operator, manually or with a pneumatic or hydraulic arrangement, urges a pair of scissoring arms together. With which scissoring arm together movement provides a mechanical advantage to the applied force to urge the blades together at a sufficient force to penetrate the granite or marble counter top edge and bottom surfaces, nipping a section therefrom.
DESCRIPTION OF THE DRAWINGS
In the drawings that illustrate that which is presently regarded as the best mode for carrying out the invention:
FIG. 1
is a top elevation perspective view taken from a forward end of a manually operated marble and granite nipping and chipping tool of the invention showing tool scissoring arms spread apart and are connected through a linkage such that, when the scissoring arms are closed towards one another, the opposing nipping and chipping blades are also closed together, nipping or shearing off portions of an edge of a section of marble or granite;
FIG. 2
is a side elevation view of the tool of
FIG. 1
, a rear elevation view being a mirror image thereof;
FIG. 3A
is a side elevation view of a forward section of the tool of
FIG. 2
;
FIG. 3B
is a view like that of
FIG. 3A
except the sections of the scissoring arms are shown as having been closed together, also closing together the opposing edges of the nipping and chipping blades;
FIG. 4
is a top plan view of the tool of
FIG. 1
, a bottom plan view being a mirror image thereof;
FIG. 5
is a forward end view of the tool of
FIG. 2
showing the opposing blades opened apart;
FIG. 6
is a rear end view of the tool of
FIG. 2
showing the scissoring arms ends spread apart
FIG. 7
is an enlarged perspective view taken from the side and behind a jaw end at the top or forward end of the tool of
FIG. 1
;
FIG. 7A
is an exploded view of one of the blade support plates of the jaw end showing the blade and blade mounting nut and bolt exploded therefrom;
FIG. 8
is an enlarged view of the blades of
FIG. 7
shown being closed together to nip or chip off a portion of an edge of a section of a granite or marble counter top;
FIG. 9
shows a side elevation view of a mechanically operated marble and granite nipping and chipping tool of the invention, showing a pneumatically operated piston arrangement that is controlled by a trigger to pass air under pressure into a cylinder, extending a piston rod out of one cylinder end, to urge tool scissoring arms apart and connect through pivots to nipping blade support plates that include spaced apart nipping blades shown fitted over an edge of a section of marble or granite; and
FIG. 10
shows the tool of
FIG. 9
after air under pressure has been passed into the cylinder by operation of the tool trigger, that air flow acting against the piston to extend a rod to spread apart the scissoring arms and urge the nipping blade edges into contact, nipping through the edge of the section of marble or granite, as shown in FIG.
9
.
DETAILED DESCRIPTION
Heretofore, marble or granite counter and sink top edges have been manually chipped, as by a skilled operator using a hammer and chisel, to form a decorative rough or chipped counter or sink top edge. In such operation, even by a skilled operator, a significant amount of time is required and mistakes are often made by such operator who chips or chisels off a greater section or chip off of an edge, have often resulted in damage that is difficult or cannot be repaired. The invention shown herein is in a tool for use by even a marginally trained worked who, with careful blade edge positioning, can remove only a desired amount of marble or granite edge. Which edge section removal is thereby carefully controlled and can be accomplished in a much shorter period of time than was possible by an operator using a hammer and chisel.
FIG. 1
shows a top elevation perspective view of a marble and granite nipping tool
10
that is for manual operation by an operator who, with their hands gripping individual grip ends
12
a
and
12
b
that are fitted onto lower ends of scissoring arms
11
a
and
11
b
, moves the arm lower ends together. Which together movement of scissoring arms
11
a
and
11
b
grips
12
a
and
12
b
is transferred through a linkage
13
to close together opposing blade edges
15
a
and
15
b
of nipping blades
14
a
and
14
b
, as set out below.
Shown in
FIGS. 1 through 7
, and best in
FIG. 7
, the linkage
13
includes upper end caps
16
a
and
16
b
that are fitted over top ends of each of the scissoring arms
11
a
and
11
b
, that each connect to a pair of parallel leverage bars
17
a
and
17
b
and
18
a
and
18
b
, respectively. The leverage bars
17
a
and
17
b
and
18
a
and
18
b
align with one another and each includes a blade stop, with blade stops
19
a
and
19
b
extending inwardly from leverage bars
17
b
and
18
b
, respectively. The respective blade stops engage, at their outer edges, to block travel together of the scissoring arms
11
a
and
11
b
, with, it should be understood, the leverage bars
17
a
and
18
a
also including like opposing blade stops forward from the leverage bars
17
a
and
17
b
and
18
a
and
18
b
ends. The leverage bars
17
b
and
18
a
forward ends are, formed, respectively, into cranks or levers
20
a
and
20
b
, and the crank or lever
20
a
includes a first pivot hole that aligns with the axis of the scissoring arm
11
a
and a second pivot hole is centered between the arms
11
a
and
11
b
. The crank or lever
20
b
includes a first pivot hole that is aligned with the axis of the scissoring arm
11
b
and with a second pivot hole centered between the arms
11
a
and
11
b
. The respective second pivot holes of cranks or levers
20
a
and
20
b
are fitted with a pivot bolt
21
that allows the cranks or levers
20
a
and
20
b
second pivot holes to move up and down as the scissoring arms are moved together and apart. The leverage bars
17
a
and
18
b
forward ends are formed, respectively, into pivot ends
22
a
and
22
b
that each align with first pivot hole of the cranks or levers
20
a
and
20
b
and received coupling pivot bolts
23
a
and
23
b
, respectively, fitted therethrough, that bolt through and couple to stem ends
25
a
and
25
b
of nipping lever arms
24
a
and
24
b
, respectively. So arranged, with the scissoring arms
11
a
and
11
b
spread apart, as shown in
FIGS. 1
,
2
,
3
A and
7
, the crank or levers
20
a
and
20
b
second pivot holes wherethrough the pivot bolt
21
is fitted are at a lowest point relative to the scissoring arms. With, as the scissoring arms
11
a
and
11
b
are moved together, shown in
FIG. 3B
, the pivot bolt
21
is elevated, moving the leverage bars
17
a
and
18
b
first pivot holes wherethrough bolts
23
a
and
23
b
are fitted, apart to, in turn spread the stem ends
25
a
and
25
b
of the nipping lever arms
24
a
and
24
b
apart.
The nipping lever arms
24
a
and
24
b
, at their upper portions, include front and rear straps
26
a
and
26
b
, respectively, that extend across and are linked to the respective nipping lever arms
24
a
and
24
b
by bolts
27
a
and
27
b
that have nuts
28
a
and
28
b
turned over threaded ends thereof after passage through aligned holes formed through mid-sections of the nipper lever arms, forming pivot couplings. So arranged, closure of the scissoring arms
11
a
and
11
b
is transmitted through the leverage bars
17
a
and
18
b
and through pivots
27
a
and
27
b
to close jaw mounting ends
29
a
and
29
b
of which leverage bars together, as set out below.
As set out above, closure together of the scissoring arms
11
a
and
11
b
is ultimately transferred through the leverage bars
17
b
and
18
a
into the crank ends
20
a
and
20
b
that connect, respectively, to stem ends
25
a
and
25
b
at first pivot holes that receive pivot bolts
23
a
and
23
b
fitted therethrough. So arranged, a mechanical advantage is provided to an operator closing together the scissoring arms
11
a
and
11
b
by the distance between the arms grips
12
a
and
12
b
and the pivot bolts, greatly increasing the force the operator can apply to close the scissoring arms together that is, in turn, transferred into the crank ends
20
a
and
20
b
and thence into the crank second pivot holes that receive the pivot bolt
21
. The pivot bolt
21
and crank ends wherethrough the second pivot holes are formed thereby moves axially from the attitude shown in
FIG. 3A
, where the scissoring arms
11
a
and
11
b
are spread apart, upwardly towards the jaw mounting ends
29
a
and
29
b
. With that pivot forward travel, in turn, spreading apart the stem ends
25
a
and
25
b
of the nipper lever arms
24
a
and
24
b
, to, and acts through, pivots
27
a
and
27
b
that are fitted through straps
26
a
and
26
b
and the nipper lever arms
24
a
and
24
b
sandwiched therebetween. The upper portions of the nipper lever arms
24
a
and
24
b
are thereby closed together, also closing together the jaw mounting ends
29
a
and
29
b.
The jaw mounting ends
29
a
and
29
b
, as shown best in
FIG. 8
, are secured, preferably by welding, across the undersurface of each of a pair of blade support plates
30
a
and
30
b
at their mid-sections, such that the blade plates form a T with the jaw mounting ends. The blade plates
30
a
and
30
b
are identical and, as shown in the exploded view of
FIG. 7A
, each blade plate includes one of a pair of like holes
36
a
that are each spaced apart equidistantly from the welded junction with the jaw mounting ends
29
a
and
29
b
and individually receive a threaded end of a bolt
32
a
that is first past through one of a pair of transverse slots
31
a
formed through the blade
14
a
, with the bolt end show aligned to receive a washer
35
a
and a lock washer
34
a
fitted thereover, with a nut
33
a
turned thereon, locking the blade onto a top surface of the blade plate
30
a
. So arranged, as shown in
FIG. 8
, the blades
14
a
and
14
b
can each be moved transversely across the top of blade support plates
30
a
and
30
b
for positioning the blades opposing edges
15
a
at an appropriate spacing distance therebetween. In practice, such spacing distance is selected for the particular edge width or thickness of a section of marble or granite
30
. Each blade
14
a
is slid across the top face of blade plate, shown as support blade plate
30
a
in
FIG. 7A
, to where, with the tool jaws spread apart, as shown in
FIG. 7
, to a proper spacing distance between the opposing blade edges
15
a
and
15
b
. The blade edges
15
a
and
15
b
positioning is then maintained by the bolts
32
a
that are fitted through blade slots
31
a
and passed through the holes
36
a
to receive washers
35
a
and
34
a
fitted over and nuts
33
a
turned onto the bolts
32
a
threaded ends. The allow for positioning of the blades
14
a
and
14
b
to where their edges
15
a
and
15
b
are spaced appropriately apart to allow for passage of an edge of a section of marble or granite
39
between the opposing blade edges, as shown in FIG.
8
. Whereafter, with closure together of the handles
11
a
and
11
b
ends
12
a
and
12
b
, the blade edges
15
a
and
15
b
close together, biting into the top and bottom marble or granite edge surfaces, and nipping off sections of marble or granite. In practice, the ability to select blade edges
15
a
and
15
b
spacing allows the tool to be used to nip or shear off sections or chips of marble or granite from a wide variety of thicknesses of marble and granite. Further, as shown in
FIGS. 1
,
2
3
A
3
B,
5
,
6
and
8
, the blades
14
a
and
14
b
each preferably include like blade edges
15
a
and
15
b
, respectively, that are formed to extend outwardly from along the blade parallel longitudinal edges. Which pair of blade edges
15
a
and
15
b
on each blade allows an operator, when the blade edge becomes dull, to dismount, turn and re-mount the blade
14
a
or
14
b
onto a blade plate
30
a
or
30
b
to position a sharp blade edge in opposition to the other blade edge.
Where the above described marble and granite nipping tool
10
is shown to be manually operated, a marble and granite nipping tool
40
that is power driven is shown in
FIGS. 9 and 10
. The marble and granite nipping tool
40
includes a same nipping end as that shown above for the marble and granite nipping tool
10
, including: the double edge blades
41
a
and
41
b
having parallel edges
42
a
and
42
b
; blade plates
43
a
and
43
b
; blade support plates
30
a
and
30
b
that each include the center hole
36
a
and
36
b
that receive bolts
44
a
and
44
b
as have passed through each of spaced lateral slots holes formed through blades
42
a
and
42
b
. Which bolts
44
a
and
44
b
are also each passed through a washer
45
a
or
45
b
, a lock washer
46
a
or
46
b
and receive a nut
47
a
or
47
b
turned over a threaded end thereof. Similarly, nipper lever arms
48
a
and
48
b
are secured, as by welding, at their top ends
49
a
and
49
b
across the lateral centers of the undersurface of each blade plate
43
a
and
43
b
, forming right angles therewith. Which nipper lever arms
48
a
and
48
b
are pivotally connected, in spaced relationship, between straps
50
by bolts
5
l
a
and
51
b
that are fitted therethrough and through aligned holes to receive nuts turned thereover. Similarly, like the nipper lever arms
24
a
and
24
b
of the marble and granite nipping tool
10
, the nipper lever arms
48
a
and
48
b
rear portions or sections connect onto, respectively, upper and lower pneumatically driven extension arms
55
and
56
, by bolts
57
a
and
57
b
and
58
a
and
58
b
, respectively, with bolt
58
a
shown as having been secured also through a forward handle
59
that has a hand grip
60
. So arranged, the nipper lever arms
48
a
and
48
b
, that are individually secured to extension arms
55
and
56
, are each free to pivot on bolts
51
a
and
51
b
, respectively, closing the opposing blades
41
a
and
41
b
together as the extension arms
55
and
56
are moved apart.
To provide which extension arms
55
and
56
outward movement, closing the opposing blades
41
a
and
41
b
together, and nipping off an edge of a section of marble or granite
85
, as shown in
FIGS. 9 and 10
, is provided by a piston rod
60
. The piston rod
60
is connected by a pivot
61
at its end
60
a
to an end
55
a
of the extension arm
55
.
The piston rod
60
is extended outwardly from a top surface
62
a
of a cylinder
62
, the piston rod traveling from the attitude shown in
FIG. 9
to that shown in FIG.
10
. As shown, the cylinder
62
includes a manifold
63
secured to its bottom surface
62
b
and is connected by a pivot bolt
64
to an end
56
a
of the extension arm
56
, and receives a pneumatic hose
65
fitting
66
turned therein. Which pneumatic hose
65
passes air under pressure through the fitting
66
and into the bottom cavity of the cylinder
62
, below a piston, that acts upon to elevate the piston that the piston rod
60
. So arranged, passage of air under pressure elevates the piston rod
60
and spreads the extension arms
55
and
56
apart to, in turn, close the opposing blades
41
a
and
42
b
together, nipping off an edge section of the section of marble or granite
59
, as shown in FIG.
10
. For controlling air passage into a valve is included in the manifold
63
having a cylinder
67
that extends outwardly from the manifold and includes a pressure fitting
67
a
on the end thereof that is fitted with a seal
67
b
and receives a trigger rod
68
longitudinally fitted therein. The trigger rod
68
is to travel back and forth to open the manifold valve to pass air under pressure into the cylinder
62
when the trigger piston
68
is urged into the cylinder
67
, extending the piston rod
60
, as shown in FIG.
10
. Air flow is closed off when the trigger piston
68
is retracted to the attitude shown in FIG.
9
. Which trigger piston
68
travel is provided by a trigger
70
having a trigger end
70
a
that is connected by a pivot pin
71
to a trigger
68
end
68
a
and, spaced therefrom, is a trigger pivot arm
72
that includes a trigger pivot pin
73
. The trigger pivot pin
73
is fitted through the trigger
70
and provides a fulcrum to the trigger whereby, when the trigger is pulled towards a handle
74
, the lower trigger end
70
a
pivots the trigger end
68
a
of the connected trigger piston
68
into the cylinder
67
, opening the pressure valve within the manifold
63
. To guide trigger
70
movement, the upper trigger end
70
b
is fitted to travel in a slot
75
formed in an upper handle mounting bracket
76
. Which handle mounting bracket
76
connects, at one end
76
a
, by bolts
77
a
and
77
b
onto top surface
62
a
of cylinder
62
, and is mounted by a bolt
78
, at its opposite end
76
b
, onto a handle
74
end
74
a
. The opposite handle
74
end
74
b
is secured to an end
79
b
of a lower bracket
79
by a bolt
80
, with the other lower bracket end
79
a
maintained to the manifold
63
lower surface by a bolt
81
. So arranged, an operator gripping in one hand the grip
60
of forward handle
59
, and holds the handle
74
in their other hand, and with their finger on trigger
70
, can pull on that trigger to pass air under pressure through line
65
that acts of the piston within cylinder
62
to extend the piston rod
60
, as shown in FIG.
10
. The blades
41
a
and
41
b
are thereby closed together, nipping off an edge portion of a section of granite or marble
85
. With release of trigger
70
, an air flow into cylinder
62
is cut off, allowing the piston rod
60
to retract into the cylinder
62
. Which piston rod
60
retraction is encouraged by a coil spring
86
that is secured at its hook ends
86
a
and
86
b
, respectively, to posts
87
a
and
87
b
that extend, respectively out from the faces of the extension arms
55
and
56
, and is stretched when the extension arms are spread apart. Upon removal of air pressure from the piston within the cylinder
62
, the stretched coil spring
86
retracts, drawing its coils together, and returns the extension arms
55
and
56
back to the attitude shown in FIG.
9
. In operation, an operator needs only to appropriately position the opposing blades
41
a
and
41
b
over the marble or granite
85
edges, shown in
FIG. 9
, and pulls the trigger
70
. The opposing blades are then closed together, nipping off a section of the granite or marble section
85
, as shown in FIG.
10
. With, upon release of the trigger
70
, the coil spring
86
pulls the extension arms
55
and
56
back to their attitude shown in FIG.
9
. Whereat, the opposing blades
41
a
and
41
b
can be reposition over a marble or granite section edge.
In practice, while the opposing blades
14
a
and
14
b
and
41
a
and
41
b
of both embodiments
10
and
40
can be positioned onto the opposing flat surfaces at a section of marble or granite edge and the blades closed together as described to nip off a portion of the edge, an operator may scribe aligned grooves or slots is the opposite marble or granite faces, proximate to the edge, to facilitate blade
41
a
and
41
b
positioning, within the scope of this disclosure. Also, while manual and pneumatical operated handle arrangements have been shown herein, it should be under stood that other closing arm arrangements could be so employed, within the scope of this disclosure.
While preferred embodiments of my invention in marble and granite edge nipping tool have been shown and described herein, it should be understood that the present disclosure is made by way of example only and that variations and changes are possible without departing from the subject matter and reasonable equivalency thereof coming within the scope of the following claims, which claims I regard as my invention.
Claims
- 1. A marble and granite edge nipping tool comprising, a pair of jaws each having a like blade mounting end that each consists of a blade support plate formed with a pair of identical center holes formed at like distances from a center of each said blade support plate, and including ends of a pair of like lever arms that are each secured to extend across said center of an undersurface of each said blade support plate, forming right angles, and said lever arms are pivotally connected together at their mid-portions and include coupling ends that receive a means for spreading apart and closing together said coupling ends; a scissoring means for coupling to said coupling ends of said lever arms to, when operated by an operator, provide a force to close said lever arms blade support plates edges together; a pair of identical nipping blades each consisting of a flat rectangular section formed from a stiff metal and includes nipping edges formed along opposing long edges, and a pair of transverse slots formed at spaced locations across said rectangular flat section longitudinal axis and are equidistant from said rectangular flat section middle and each said transverse slot receives a bolt fitted therethrough that passes also through one of said pair of holes formed in each said blade support plate, and which said bolt ends are treaded to receive nuts turned thereover, for locking each said nipping blade onto a blade mounting where said nipping blades nipping edges are parallel to one another and spaced a desired distance apart to nipping a selected thickness of an edge of a section of marble or granite.
- 2. The marble and granite nipping tool as recited in claim 1, wherein the blade support plates are each like flat plates with undersurfaces of each to receive a lever arm upper end secured across said flat blade support plate transverse center, forming a T; and metal straps are fitted across opposite faces of said lever arms mid-portions that receive bolts fitted through aligned holes formed in said lever arms mid-portions and through said metal strap ends, and with nuts turned over said bolts ends, pivotally coupling said lever arms.
- 3. The marble and granite nipping tool as recited in claim 1, wherein the scissoring means include, as forward ends, a pair of leverage bar means that each connect, on a forward end of each, to one each of the pair of lever arms and include means for spreading apart and closing together which said leverage bar means forward ends.
- 4. The marble and granite nipping tool as recited in claim 3, wherein the pair of leverage bar means each includes one forward end that includes a pivot and with the other of said forward ends ending in a crank, with a combination of a pivot and crank ends to fit over and sandwich therebetween each of the ends of the lever arms, and with other ends of said cranks to align and each receives a fastener means fitted therethrough as a movable pivot, wand which said movable pivot will travel from rear to forward positions as rear ends of said pairs of bars are moved together and apart.
- 5. The marble and granite nipping tool as recited in claim 4, further including a pair of straight scissoring arms each having a forward that is connected to one of the pairs of bars and includes a handle means fitted over rear end portions of each, and each said handle means is for gripping by an operator for moving said scissoring arms together and apart.
- 6. The marble and granite nipping tool as recited in claim 5, wherein blade stop means consisting of opposing tabs are secured to said pairs of bars rear ends in opposing relationship, that contact to limit travel of said pairs of bars rear ends together, controlling the distance of closure of the blade mounting ends of the lever arms.
- 7. The marble and granite nipping tool as recited in claim 3, wherein the scissoring means include, as the leverage bar means, a pair of extension arms having forward ends that are each rigidly coupled to each of the pair of lever arms and having mid to rear portions thereof fitted between a spring return, pneumatic cylindrical body and piston rod, which said piston rod, when extended outwardly from a top of said cylindrical body, upon receipt of an air flow under pressure directed into said cylindrical body, spreads apart said extension arms rear ends, with said spring return to bias said extension arms rear ends into a closed attitude, and retract said piston rod back into said cylindrical body the flow of air under pressure into said cylindrical body is discontinued.
- 8. The marble and granite nipping tool as recited in claim 7, wherein the spring return is a coil spring having ends that are, respectively, each connected to one of a pair aligned pins that each extend outwardly from mid-portions of each of the extension arms.
- 9. The marble and granite nipping tool as recited in claim 7, wherein the cylindrical body includes a movable piston fitted to travel therein and mounts the piston rod that extends out from the center thereof, at a right to an upper surface of said movable piston, and said piston rod is pivotally connected at its top end to an upper extension arm rear end.
- 10. The marble and granite nipping tool as recited in claim 9, wherein a bottom end of said cylindrical body is rigidly connected to a bottom extension arm rear end and includes a manifold that is ported into said cylindrical body, opening below the movable piston, and said manifold includes a connector for coupling to a fitting whereto is connected a hose for passing air under pressure; and valve means arranged with said manifold that includes a means for opening said valve means to pass and shut off a flow of air under pressure into said manifold that flows into said cylindrical body.
- 11. The marble and granite nipping tool as recited in claim 10, further including a handle means for connection to, to extend rearwardly from, the top surface of the cylindrical body and the a bottom surface of said manifold; and a trigger means is arranged with said handle means for operation by an operator who pulls and releases said trigger to, respectively, open and close the valve means.
US Referenced Citations (16)
