U.S. patent number 3,779,605 [Application Number 05/276,123] was granted by the patent office on 1973-12-18 for roofing removal apparatus.
Invention is credited to John J. Nieman.
United States Patent |
3,779,605 |
Nieman |
December 18, 1973 |
ROOFING REMOVAL APPARATUS
Abstract
This invention relates to a tractor having detachably secured
thereto a roofing removal apparatus, said apparatus comprising a
frame having slidable guide rods carrying a cutting head forwardly
of said apparatus and a vertically disposed eccentric driving shaft
carried by said apparatus and driven by said tractor, said driving
shaft having a connecting rod connecting said cutting head thereto
for reciprocating action of said cutting head.
Inventors: |
Nieman; John J. (New Prague,
MN) |
Family
ID: |
23055279 |
Appl.
No.: |
05/276,123 |
Filed: |
July 28, 1972 |
Current U.S.
Class: |
299/37.1 |
Current CPC
Class: |
E04D
15/003 (20130101) |
Current International
Class: |
E04D
15/00 (20060101); E04d 015/00 () |
Field of
Search: |
;299/37 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Purser; Ernest R.
Claims
What is claimed is
1. A roofing material removing apparatus in connection with a
tractor having a power take-off, having in combination
a supporting structure comprising a pair of spaced frame members
detachably secured to said tractor and extending forwardly
thereof,
a pair of substantially horizontally disposed guide rod members
slidably carried by said frame members and extending forwardly
thereof,
a cutting head member carried by said guide rod members,
a housing structure carried by said frame member supporting a gear
box,
said gear box having said power take-off connected thereto,
a stub shaft depending from said housing,
a pair of vertically spaced bearing blocks carried by said housing
forwardly of said shaft,
an eccentric shaft journaled in said bearing blocks,
driving means connecting said stub shaft and said eccentric shaft,
and
a connecting rod connecting said eccentric shaft and said cutting
head.
2. The structure set forth in claim 1, including
a pair of vertical plate members carried by said supporting
structure,
said frame members being secured to said plate members, and
said plate members as having vertically spaced apertures therein
through which said frame members are secured for vertical
adjustment of the height of the adjacent ends of said frame members
to adjust the angular position of the cutting head to the surface
being worked upon.
Description
SUMMARY AND BACKGROUND OF THE INVENTION
The type of roofing for removal made reference to herein is
commercial roofing made up of alternate layers of tar and felt with
an overlay of gravel disposed on a substantially flat roofing
surface. The removal of this type of roofing for repair or for
replacement is a laborious and time consuming job.
It is an object of this invention therefore to provide a sturdy
simply constructed apparatus for the removal of commercial
roofing.
It is another object of this invention to provide a commercial type
roofing removing apparatus arranged and constructed for attachment
to a commonly used type of a walking tractor.
It is a further object of this invention to provide a roofing
removal apparatus having a thrust assembly operated by a tractor
and having said thrust assembly include a roofing removal cutting
head member said head member bearing the forward weight of said
tractor in undercutting said roofing.
More generally stated, it is an object of this invention to provide
a roofing removal apparatus comprising a walking tractor, a thrust
assembly attached to said tractor, said thrust assembly including a
tapered toothed cutting head member for undercutting or removing
roofing material, means guiding said head member in operation and
means driven by said tractor reciprocating said head member.
These and other objects and advantages of the invention will be set
forth in the following description made in connection with the
accompanying drawings in which like reference characters refer to
similar parts throughout the several views and in which:
FIG. 1 is a top plan view showing phantom portions thereof in
dotted line;
FIG. 2 is a view in side elevation with a phantom portion thereof
shown in dotted line and a portion thereof being broken away;
FIG. 3 is a broken bottom plan view taken on line 3--3 of FIG. 2 as
indicated; and
FIG. 4 is a broken view in longitudinal vertical section taken on
line 4--4 of FIG. 3 as indicated.
DESCRIPTION OF A PREFERRED EMBODIMENT
Referring to the drawings, the apparatus herein is indicated
generally by the reference numeral 10. Comprising a portion of said
apparatus is a walking tractor 12 as representative of a commonly
used type of a walking tractor which consists generally of a frame
having side members 15 and 16 supported by wheels 19 and having
mounted thereon a motor or engine 20 and in connection therewith is
a pair of handles 22.
Upstanding from the forward end portions of said frame members 15
and 16 are plate members 25 of which only one is shown in FIG. 2.
Said plate members have vertically spaced apertures 26 which will
be further described.
The structure for roofing removal which comprises the essential
subject matter of the invention herein and which may be regarded as
an attachment to said tractor is indicated generally as thrust
assembly 27 and is hereinafter further described.
Extending forwardly of said members 25 and being secured
respectively thereto through an aligned pair of said apertures 26
by bolts 30 are relatively flat frame members 28 and 29 being held
in transversely spaced relation by longitudinally spaced underlying
cross members 33, 34 and 35.
Secured to the lower inner side portions of said frame members as
by welding are a pair of open ended elongated tubular or channel
members 38 and 39.
A pair of guide rod members 42 and 43 are respectively movably
disposed within said channel members. Carried by said rods at their
forward outer ends as by being welded thereto is a thrust member 46
comprising a tapered vertically angled cutting head member 48
having an underlying cross plate member 50 and having a toothed
forward end portion 51 formed into a plurality of elongated tapered
teeth 52 forming a sharp leading edge 53. It will be noted in FIGS.
2 and 4 that said cutting head member 48 is designed and arranged
to have its toothed portion positioned to be angled downwardly
sufficiently to have only its leading toothed edge portions 53
engaging the roof or working surface and forming the forward
support for the entire apparatus. The apparatus thus will be
supported by said wheels 19 and said leading edges 53. The entire
forward weight of the apparatus provides the weight to hold the
cutting head 48 in a downward roofing engaging operating
position.
Mounted between said frame members 28 and 29 secured thereto as by
bolts or as by welding and upstanding therefrom is a housing 60
having side walls 61 and 62, a top wall 63 having an opening
therein to accommodate a shaft to be disposed therethrough and a
front wall 64 having a central opening 65.
Carried by said housing and secured thereto as by bolts is a gear
box 67 of conventional structure and running thereto from said
engine 20 is a power take-off or drive shaft 69 here shown having a
housing thereabout. Driven by said shaft 69 through said gear box
is a vertical shaft 72 journaled in said housing 60 and carrying at
its lower end portion a sprocket 77.
Extending forwardly of said front wall 64 from the upper and lower
portions thereof are vertically spaced bearing blocks 80 and 81.
Journaled in said blocks is a vertical eccentric shaft 83 carrying
intermediate said bearing blocks a sprocket 84 in alignment with
said sprocket 77 and passing over said sprockets is a chain 86.
Said shaft 83 has its eccentric portion extending below said
bearing block 81 formed as a cam head or crank 87 which portion is
disposed within a conventional bearing structure 88 which is
mounted within the hub or pitman 89 or an eccentric arm or
connecting rod 90 which rod extends forwardly being connected at
its forward end to a universal ball joint 93 which is secured to a
plate member 97 carried by the cross member 50 of said cutting head
member 48.
Brace members 98 and 99 extend from said frame members 28 and 29 to
said members 25 as indicated with respect to the member 99 in FIG.
2.
A pair of vertical support members 100 and 101 extend upwardly from
said frame members 28 and 29 to support an upwardly inclined cover
plate or deflection member 103 extending upwardly from the forward
tapered end portions of said plate members 28 and 29 being secured
thereto by bolts 105.
OPERATION
The tractor 12 will be operated in a conventional manner and the
power take-off or shaft 69 will be used to drive the thrust
assembly for the removal of roofing material.
The wheels 19 provide one point of support for the tractor and the
weight of the forward portion of the tractor and of the thrust
assembly is born by the leading edge portion 53 of the cutting
member 48 to provide the weight to hold said head member downward
in its operating position. The power take-off 69 by means of the
operatively connected shafts 72 and 83 and by means of the cam head
or crank 87 orbits the connecting arm 90 which in turn reciprocates
the cutting head member 48. The rods 42 and 43 slidably disposed in
said channel members 38 and 39 serve to guide said cutting head
member 48 in a planar operating position permitting said member to
move in a straight forward and rearward motion. Hence the cutting
head member 48 is reciprocated forwardly along a roof surface to
undercut and remove the roofing material.
The efforts of the operator are reduced to guiding or steering the
apparatus and he is not required to exert himself to hold the
cutting head member downwardly in operating position. The weight of
the tractor and of the thrust assembly is sufficient to hold said
head member 48 in its operating position undercutting and freeing
said roofing material and in raising the same upwardly to have it
move upwardly of said cover plate member 103 and said material then
may be pushed off by the operator as loose material. The loose
roofing material will be separately handled. The phrase "removal of
roofing material" as used herein refers to cutting roofing material
free from the underlying roof structure.
This is a simply and sturdily constructed apparatus having a
powerful forward thrust applied to the cutting head member 48 and
the results of the apparatus in actual operation have been very
successful in the rapid and efficient removal of roofing material
and in effecting substantial savings in the cost of doing the
work.
It will of course be understood that various changes may be made in
form, details, arrangement and proportions of the parts without
departing from the scope of the invention herein which, generally
stated, consists in an apparatus capable of carrying out the
objects above set forth, in the parts and combinations of parts
disclosed and defined in the appended claims.
* * * * *