U.S. patent number 3,736,614 [Application Number 05/216,658] was granted by the patent office on 1973-06-05 for abrading device for attachment to electric knife drive.
Invention is credited to Sharon M. Crostic, William E. Froelich.
United States Patent |
3,736,614 |
Crostic , et al. |
June 5, 1973 |
ABRADING DEVICE FOR ATTACHMENT TO ELECTRIC KNIFE DRIVE
Abstract
A portable power-driven abrading or scouring device has two arms
adapted to be connected at one end to power means for reciprocating
at least one of the arms with respect to the other, the arms having
at their outer ends a pair of spaced pivot means, preferably in the
form of balls. The pivot means are spaced laterally and are
connected to an abrasive holder. When the pivot means are balls,
the abrasive holder preferably is a block with sockets in which the
balls are seated, to provide, within limits, two degrees of
freedom.
Inventors: |
Crostic; Sharon M. (Arnold,
MO), Froelich; William E. (Barnhart, MO) |
Family
ID: |
22807969 |
Appl.
No.: |
05/216,658 |
Filed: |
January 10, 1972 |
Current U.S.
Class: |
15/97.1;
30/277.4 |
Current CPC
Class: |
A47L
17/04 (20130101) |
Current International
Class: |
A47L
17/04 (20060101); A47L 17/00 (20060101); A47l
017/04 () |
Field of
Search: |
;15/97R,93R,28,23,22,29R,29A,29AH ;30/272A,273 ;51/17MT,17T ;310/37
;74/20 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Machlin; Leon G.
Claims
Having thus described the invention, what is claimed and desired to
be secured by Letters Patent is:
1. A power driven abrading or scouring device comprising two arms
adapted to be connected at one end to power means for reciprocating
at least one of said arms with respect to the other, said arms
being laterally spaced apart at another end and each having, at
said other end, pivot means in the form of a ball, said balls being
laterally spaced from one another; an abrasive holder in the form
of a block having sockets complementary to said balls and in which
said balls are seated whereby said block is pivotally connected to
said arms, and means for mounting abrasive on said abrasive
holder.
2. A power driven abrading device comprising two arms adapted to be
connected at one end to power means for reciprocating at least one
of said arms with respect to the other, said arms being laterally
spaced apart at another end and each having, at said other end,
pivot means, said pivot means being spaced laterally from one
another, and an abrasive holder pivotally connected to both said
pivot means, said arms pivot means being balls secured to said
arms, and said abrasive holder comprising a block having sockets in
which said balls are seated.
3. A power driven abrading device comprising two arms adapted to be
connected at one end to power means for reciprocating at least one
of said arms with respect to the other, said arms being laterally
spaced apart at another end and each having, at said other end,
pivot means, said pivot means being spaced laterally from one
another, and an abrasive holder having means complementary to said
arms pivot means whereby said abrasive holder is pivotally
connected to said arms, each of said pivot means comprising one
element of a ball and socket and each of said complementary pivot
means comprising the other element of ball and socket.
4. An abrading or scouring device for selective mounting on and
demounting from a portable power head of the type used to drive
reciprocating carving blades, comprising two arms adapted to be
connected at one end to said power head for reciprocating at least
one of said arms in respect to the other, said arms at said end
being closely spaced and parallel to one another, said arms being
laterally spaced apart at a second end remote from said first end,
each of said arms having at said second end pivot means laterally
spaced from one another; abrasive holder means having means
complementary to said arms pivot means for pivotally mounting said
abrasive holder means on said arms, and abrasive mounted on said
abrasive holder.
5. The device of claim 4 wherein the abrasive holder is selectively
mountable on and demountable from said arms.
Description
BACKGROUND OF THE INVENTION
This invention has particular though not exclusive application to
portable devices, corded and cordless, of the character of electric
carving knives in which two blades, held parallel with one another,
are reciprocated with respect to one another by an electric
motor.
Scouring pots and pans, sinks, ovens, and other cooking appliances
and appurtenances is a time-consuming and onerous task. In
industrial practice, buffing wheels, sanders, and the like are
commonly used to clean surfaces, but for the housewife, there has
been little choice but to scour utensils and appliances and to buff
silver manually with abrasives ranging from steel wool, through
sand paper, to rouge, all of which are abrasives of sorts, and are
embraced within the term "abrading elements" as used in this
application.
One of the objects of this invention is to provide a portable,
easily used and efficient abrading device, particularly, but not
exclusively, for homemakers.
Another object is to provide such a device which is inexpensive,
and may be made in a form readily adapted to use with existing
power sources.
Other objects will become apparent to those skilled in the art in
the light of the following description and accompanying
drawing.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing,
FIG. 1 is a view in perspective, with a power source shown
fragmentarily in broken lines, of one illustrative embodiment of
device of this invention;
FIG. 2 is a top plan view of the device shown in FIG. 1;
FIG. 3 is a view in side elevation of the device shown in FIGS. 1
and 2;
FIG. 4 is a top plan view of one arm of the device shown in FIGS.
1-3;
FIG. 5 is a view in side elevation of the arm shown in FIG. 4;
FIG. 6 is a bottom plan view of an abrasive holding block part of
the device shown in FIGS. 1-3;
FIG. 7 is a top plan view of the abrasive holding block shown in
FIG. 6;
FIG. 8 is a view in side elevation of the abrasive holding block
shown in FIGS. 6 and 7;
FIG. 9 is a sectional view taken along the line 9--9 of FIG. 7;
FIG. 10 is a view in side elevation of an abrasive mounting
pin;
FIG. 11 is a view in end elevation along the line 11--11 of the pin
shown in FIG. 10;
FIG. 12 is a view in side elevation of a mounting clip;
FIG. 13 is a view in edge elevation taken along the line 13--13 of
the clip shown in FIG. 12; and
FIG. 14 is a view in end elevation taken along the line 14-- 14 of
the clip shown in FIG. 13.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawing for one illustrative embodiment of
abrading device of this invention, reference numeral 1 indicates a
power source which, in the embodiment shown, represents the power
head of a conventional electric portable slicer in which knife
blades are selectively mountable and demountable with a
reciprocating driver. Typical such power heads are produced by
General Electric Company and Hamilton Beach Company. The power head
and driver as such form no part of this invention. However, for
convenience and to some extent safety, a cordless type, such as the
Hamilton Beach Model 285 cordless, for example, is preferred.
Arms 2 and 3 are, at one end 4, formed in exactly the same way as
the knife blades, and are mounted to the power head 1 in exactly
the same way. Each of the arms 2 and 3 has a middle section 5 which
is rectangular in cross section and of somewhat greater thickness
than the conventional knife blade. At an outer end 6, each of the
arms 2 and 3 is bent divergently outwardly, to space the arms a
greater distance than they are spaced through the middle section 5,
and are twisted, so as to establish the broad surface of the arm at
right angles to the same surface in the middle section 5 of the
arms.
As shown particularly in FIGS. 4 and 5, and as indicated in FIG. 2,
a ball 10 is brazed or welded or otherwise secured to the underside
of the end 6 of each of the arms 2 and 3.
In the embodiment shown, an abrasive holding block 15 is circular
in plan, of substantial thickness, and provided with sockets 20 in
which the balls 10 are mounted. The balls 10 are free within the
sockets 20, but are caged within them, so that they cannot be
withdrawn. The block 15 can be made of plastic, with the sockets
cast in it, or the sockets can be defined by inserts. While the
preferred embodiment is described as having the balls caged
permanently within the sockets 20, it can be seen that, by using
conventional split ring or spring detent type sockets, the balls
can be removed.
In the preferred embodiment, the block 15 has a plane top surface
16, through which the sockets 20 open, and midway between the
sockets 20, a shallow channel 17, into which a passage 18 opens.
The passage 18 opens at its other end through a concave surface 19
bounded around its perimeter by a rim 25. A multiplicity of prongs
26 project from the concave surface 19. The prongs 26 serve to hold
a round scouring pad 40, which, in this embodiment constitutes the
abrading element, from moving relative to the block 15. The
scouring pad 40 in the illustrative embodiment is a circular,
soap-filled steel wool disc about 21/2 inches in diameter and
three-fourths of an inch thick, sold commercially under the
trademark S.O.S. by Miles Laboratories, Inc.
The scouring pad 40 is held against the prongs 26 and the concave
surface 19 by a retaining pin 50. The retaining pin 50 has a head
51, and a shank 52, with a series of annular serrations 53 on it,
as shown particularly in FIG. 10.
The shank 52 extends through the passage 18, and is held in
position by a spring clip 60. The spring clip 60 has a pair of arms
61 terminating in tabs 62, each of which has in it a hole 63, the
holes being normally offset from one another, as shown in FIGS. 12
and 14. The pin 50 is pushed through the scouring pad 40 until the
head 51 is in solid engagment with the pad, the arms 61 are
squeezed toward one another until the holes 63 are aligned, and the
clip is pushed down into the channel 17 as far as it will go, the
legs released, and the tabs 62 allowed to spring apart, permitting
a part of the hole-defining edge of each of the holes 63 to engage
one of the serrations 53 of the pin.
In operation, the arms 2 and 3 are mounted in the power head in the
usual way. When the power head is turned on, the arms reciprocate
with respect to one another, causing the block 15 and the pad 40 to
oscillate. In those power heads in which one arm remains stationary
and the other arm reciprocates, the movement of the block 40 will
be about an axis eccentric with respect to the block and pad. If
both arms reciprocate, the motion of the block 15 and pad 40 will
be substantially about an axis coincident with the pin 50. It can
be seen, that if it is desired in either type, the axis of rotation
of the block 15 can be made at any desired place by moving the
relative positions of the sockets.
It can be seen that various other abrading elements can be used in
lieu of the scouring pad 40. A chamois pad, for example, can be
used for polishing silver platters and the like, while a grit
covered pad can be used where harsher abrasion is desired.
While, in the preferred embodiment shown, the abrading element has
been shown and described as being separable from the block 15, the
abrading element may be made a permanent part of the block 15, and
the block 15 made detachable from the pivot means on the arms 2 and
3. Under such circumstances, the bottom surface of the block 15 may
be made flat or convex, and be either made of an abrasive material,
or have an abrading element permanently secured to it. The abrasive
holder can be made disposable, eliminating the need for separate
abrading element mounting means.
While in the preferred embodiment, the pivot means are balls, which
give, within limits, two degrees of freedom, so that the pad 40
tends to rest flat upon the surface to be abraded with minor
changes in the angularity between the arms 2 and 3 and the block
15, other pivot means, including cylindrical ones, can be used. The
arms may be provided with sockets, and the abrasive holder with
balls or studs, or one arm can be provided with a male element, and
the other a female element, with complementary elements on the
block. Both male and female pivot means may be carried by either
the arms or the abrasive holder, with means for connection to the
other member, as by a square-shaft and socket arrangement similar
to that of a common detachable head socket wrench.
The size and configuration of the arms 2 and 3 can be varied, as
can the nature of the retaining means for the abrading element.
Thus, other types of clips, pins, and the like, can be used.
Numerous other variations in the construction of the abrading
device of this invention, within the scope of the appended claims,
will occur to those skilled in the art in the light of the
foregoing disclosure.
* * * * *