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Патент USA US3049347

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Aug. 14, 1962
v. GRIGGS
v 3,049,337
PRY BAR
Filed Feb. 29, 1960
v
K25
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2g Virgil Cirigge.
INVENTOR.
.
BY
20
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ATTORNEYS.
United States Patent O?ice
3,049,337
Patented Aug. 14, 1962
1
2
3,049,337
stantially greater face areas ‘11 and 12 than edge areas.
The face areas 11 and 12 preferably are generally right
triangular in shape with the ends of the connector mem
PRY BAR
Virgil Griggs, 6201 N. Topping, Kansas City, Mo.
Filed Feb. 29, 1960, Ser. No. 11,772
2 Claims. (Cl. 254-131)
This invention relates to a prying or ripping bar for
separating ‘articles which are nailed or otherwise fas
ber 2 attached thereto substantially adjacent to the right
angles 13 and 14. The upper hypotenuse edges 15 and
16 of the right triangles preferably are approximately
twice as long as the shortest edges 17 and 18 which are
at right angles with respect to bottom edges 9 and 10.
The side elements 6 and 7 each have portions removed
An object of the present invention is to provide a pry 10 to form receivers in the upper portion whereby the edges
bar having specially constructed laterally spaced side ele
15 ‘and 16 are generally interrupted by arcuate concave
tened together.
ments which may be positioned to straddle one edge of
a stud with the side elements extending in contact with
the under surface of a board being removed from the
stud so that by arcuate movement of the bar handle, the
board will be pried free from the studding with ease and
with a minimum of cracking or splitting of the board
sections 20 and 21 extending longitudinally and posi
tioned approximately midway the ends thereof, the con
?ooring boards and sub?ooring for prying them apart
and 27 before they terminate adjacent the shortest edges
with a minimum of tongue breakage and with a maxi
mum of salvageability.
A further object of the present invention is to provide
a pry bar with prying elements ‘formed of thick plate
material loaded transverse to the faces thereof whereby
17 and ‘18 of the side elements.
In operation, the pry bar provides a convenient means
for separating both interlocking floor board-s from sub
?oors and for prying boards from studding and the like.
FIG. 1 illustrates the pry bar separating ?ooring
cave sections ‘20 and 21 of the upper edges preferably
are approximately one-half the length thereof. The
concave sections 20 and 21 alter the pro?les of the edges
15 and 16 so that ‘as the handle 1 is approached from
being removed.
the pointed ends 22 and 23 of the pry bar the edges v15
A further object of the present invention is to provide
and 16 ?rst describe straight sections 24 and 25, then
a pry bar which may be inserted between interlocking 20 concave sections 20 and 21 and then straight sections 26
extremely high strength and rigidity is exhibited.
A further object of the present invention is to provide
a pry bar having a load contacting edge which varies
along the length thereof ‘from a ?at to a concave and
subsequently to a ?at contour to produce a ‘gentle twist
ing of the ?ooring boards for separating tongue in groove
interlocking members without damage thereto, and to
provide a selective mechanical advantage.
Other objects and advantages of this invention will be
come apparent from the ‘following description taken in
connection with the accompanying ‘drawings wherein are
set forth by way of illustration and example certain em
bodiments of this invention.
FIG. 1 is a perspective view of the pry bar resting
upon sub?ooring and in position ‘for prying flooring
boards therefrom.
FIG. 2 is a perspective view of the pry bar of this in—
vention straddling a stud and in position for prying
boards therefrom.
FIG. 3 is a partial vertical sectional view of the pry
boards 30 from sub?ooring 31. The flooring boards 30
.on one longitudinal side edge thereof each has a tongue
32 and a groove 33 on the opposite longitudinal side edge
thereof whereby when laid in a ?oor the tongue of one
board engages in and mates with a groove of an adja
cent board. In prying loose flooring boards by conven
tional means, the tongues and grooves are, commonly
damaged due to application of shear forces while the
tongue and groove are interlocked. With the pry bar
of this invention, however, as. the ?ooring boards 30
are raised ‘from the sub?oor 31, the boards 30 are twisted
about their longitudinal axis, the tongue and groove en
gagement is gradually worked loose and separated by
the forces produced ?rst by engagement with the straight
sections 24 and 25 and subsequently by the concave sec
tions 20‘ and 21 and then by the straight sections 26 and
27. It can thus be seen that by inserting the points 22
and 23 between a sub?ooring 31 ‘and the flooring boards
p 30 and arcuately rotating the handle 1 while pushing the
pry bar forwardly and with the points 34 at triangles 13
and 14 and then the points 22 and 23 serving as ful
crums, the ?ooring boards 30‘- are gently lifted and
bar taken along the line 3-3, FIG. 4.
FIG. 4 is a partial plan view of the pry bar.
Referring more in detail to the drawings the pry bar
twisted alternately clockwise and counterclockwise about
of this invention comprises a handle 1 which is rigidly 50 their axis to urge the tongue and groove apart without
connected as by means of welding to a transverse con
damage thereto while removing the boards 30 from the
nector or cross member 2 preferably cylindrical in shape.
The connector member or bar 2 has a length which is
sub?ooring 31.
For removing a board 35 which has been attached to
somewhat greater than the width of studding 5 on which
a stud 5 as shown in FIG. 2, the side elements 6 and 7
the pry bar is adapted to- be used. Side elements 6 and 55 are placed in straddling position on the edge of stud 5
7 are rigidly attached, for example by welding, in lateral
and the points 22 and 23 are urged underneath the board
ly spaced relation at opposite ends of the connector mem
35. Because of the space afforded by the concave sec
ber 2 with said side elements in parallel relation to each
tions 20 and 21. the side elements 6 and 7 may be pushed
other. The side elements 6 and 7 substantially corre
a substantial distance beneath the board 35 in order that
spond in shape and preferably are of generally triangu
60 the connector member 2 may engage the stud 5 and serve
lar shape and attached to the ends of the connector mem
ber 2 in aligned relationship whereby the bottom edges
as a fulcrum close to the board 35. Another advantage
of the concave sections 20 and 21 is that upward pres
9 and 10‘ respectively of said side elements are in a com
sure may be applied in selective areas on the underside
mon plane and preferably spaced from the connector
of board 35 (FIG. 2) to loosen the board without tend
member. The handle 1 preferably is arranged at an 65 ing to cause longitudinal cracking. When the handle 1
angle of about 45° with respect to the plane of the edges
is pushed toward the stud 5, the connector member 2
9 and 10, however, other angles may be used to provide
acts as a fulcrum with a lever arm terminating only a
comfort and ease for the particular workman to apply
short distance away and another lever arm (handle 1)
force to said handle and manipulate the structure.
terminating a considerable distance away, thus producing
The side elements 6 and 7 are formed of thick plate 70 a very large mechanical advantage. After the large
material such as cold rolled steel plate and have sub—
initial forces have started to move the board 35 away
3,049,337
3
from the studding 5, the sections 24 and 25 may be
brought into contact with the board 35 for quick removal
of the board.
From the foregoing, it is apparent that due to the
particular con?guration shown and described herein, I
have disclosed a pry bar for prying loose ?ooring from
sub?ooring and boards from studding which is adapted
for ease of use while providing salvageability which was
hitherto unknown.
It is to be understood that while I have illustrated and
described one form of my invention it is not to be
limited to the speci?c form or arrangement of parts here
in described and shown except insofar as such limitations
are included in the claims.
What I claim and desire to secure by Letters Patent is:
1. A pry bar for prying boards from a ?at surface
comprising, a pair of laterally spaced plate members,
said plate members being located in substantially paral
lel relation, a cross bar rigidly connected to and be
tween said plate members for maintaining said plate
members in said spaced and parallel relation, an elon
gated handle ?xed to said cross bar and extending trans
versely therefrom in a direction substantially parallel to
said plate members, each of said plate members having
an upper edge and a lower edge respectively terminat
ing in a forwardly extending point, said points aiming
in the same direction and being substantially equally
4
spaced from said cross bar, said upper edges forming
prying surfaces, said lower edges forming resting sur
faces for resting on the ?at surface, each of said upper
edges having a similar mutually aligned compound con
tour including a longitudinally straight portion adjacent
a respective point and a longitudinally concave portion
located rearwardly of said straight portion and blending
thereinto whereby boards pried by said bar are ?rst
twisted upwardly from the flat surface in one direction
as they contact said straight portions and then are
twisted in the opposite direction as they contact said con
cave portions.
2. The pry bar of claim 1 wherein said compound
contour includes two longitudinally straight portions and
said concave portion is located therebetween, said con
cave portion extending approximately one-half the length
of the respective upper edge.
References Cited in the ?le of this patent
UNITED STATES PATENTS
195,412
Spurr ______________ __ Sept. 18, 1877
841,050 .
Robert _______________ .._ Jan. 8, 1907
935,727
Anderson ____________ __ Oct. 5, 1909
1,309,734
2,374,530
2,769,236
Hem?ing ____________ __ July 15, 1919
Fiebke _____________ __ Apr. 24, 1945
Phillips et al. ________ __ Nov. 6, 1956
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