вход по аккаунту


код для вставки
April 19, 1949.
Filed March 29, 1947
Patented Apr. 19, 1949
Charles A. French, Eburne, British
Columbia, Canada
Application March 29, 1947, Serial No. 738,053
2 Claims.
‘My invention relates to improvements in trac
tor hoists. ‘The objects of the invention are to
provide a device adapted for attachment to a
self-propelled vehicle, particularly a tractor, to
which any desired type of implement may be
shaft is journalled in bearings 24 extending'rrorn
the base bracket 4. The shaft 23 is extended ups
Wardly to any suitable height and is ?tted with
a Hand crank 2G for the purpose of rotating the
worm 22 to rock the face plate It] about its hori
zontal axis. A hinge lug 21 is provided upon the
secured, raised for transportation or lowered or
tilted as may be necessary for the proper use of
face plate M to which a cylinder block 29_ is con
said implement; to provide a tool which can be
nected by a pin 30. The block 29 is bored hori
used either to draw or push an implement to do
zontally to de?ne a hydraulic cylinder 3|, see
its work, and to provide a tool which is excep~ 10 Figure 3, having an inlet connection 32 to which a
tionally rugged so that side or other unusual
?exible hose 33 leading from a suitable source of
strains will cause no damage to the device and the
‘hydraulic ?uid, not shown, is connected. The
use of extraneous braces or struts are unneces
cylinder 3| is ?tted with a ram 35 having a fork
36 at its outer end which journals a roller 31.
In the conventional type of hoist used on trac
The roller 3'! bears and rides upon an arcuate
tors, earth cannot be removed close to a fence or
cam 39 carried upon the face plate M below the
wall by a scraper because said scraper must be
hinge lugs 21. The block 29 is preferably ?anged
set with its cutting edge towards the tractor ve
at its free end as at Ml to receive a similar ?ange
hicle, whereas with the present invention the
ill of an arm 42. The arm 42 is provided with a
scraper can be set with its cutting edge to the
fork 44 which is apertured and ?tted with one or
rear and be driven rearwardly right up to the
more loose pins 45 for the purpose of connecting
otherwise inaccessible boundary to remove un
any desired implement 50 to the arm.
wanted earth.
The invention contemplates a face plate rock
Assuming the implement 50 to be a plow, in
which case the right wheel of the tractor vehi
ably mounted in a base bracket and an arm piv
cle will be required to run in a furrow and the
otally mounted upon said base plate and a hy
transverse member I attached to said vehicle to
draulic ram for swinging the arm, as will be more
be out of horizontal, it will be necessary to level
fully described in the following speci?cation and
the plow transversely in order that all shares
shown in the accompanying drawings, in which
will cut to the same depth level. To level the
Fig. 1 is a side elevational view of the inven 30 shares of the plow, the hand crank 26 is rotated
tion showing a part in section.
to cause the worm 22 to turn the face plate M,
Fig. 2 is an elevational view taken from the
the block 29 and the arm 42 about the longitudi
free end of the arm.
nal axis of the face plate an appropriate degree
Fig. 3 is a fragmentary sectional view of the
to bring the hinge pin so to a horizontal position.
cylinder block showing the hydraulic ram.
When the plow is to be raised out of ground
In the drawings like characters of reference
contact, hydraulic ?uid is forced into the cylin
indicate corresponding parts in each ?gure.
der 3| behind the ram 35, which thrusts said ram
The numeral 1' indicates generally a rear
outwardly, causing the roller to bear upon the
transverse chassis member forming part of a
face of the arcuate cam 39 and tilt the block 29
tractor, to which the hoist generally indicated by 40 and its associated arm parts upwardly towards
the numeral 2, is ?tted. The numeral 4 indi
the position indicated by dotted line in Figure 1.
cates a base bracket attached by bolts 5 to the
The swing of the arm 62 will be in a vertical plane
chassis member I and provided with a cylindri
at all times, so that the land side of the furrows
cal projection 6, the end ‘I of which is bored as
cut will remain vertical and undamaged during
at 8 to form a bearing for a face plate It. The 45 the lifting process.
face plate In consists of a stub shaft l2 which is
If a scraper bucket or bulldozer blade is used,
journalled in the bearing 8, a circular neck por
the cut can be parallel with the tread of the trac
tion I3 and a front plate I 4. The stub shaft is
tor vehicle or inclined as desired by simply ma
?tted at its inner end with a washer l6 bearing
nipulating the hand crank in a desired direc
on the inner end wall ll of the cylindrical por
tion. If any obstruction is encountered by the
tion 6 of the base bracket 4 and is held in place
implement, tending to raise it above its set posi
by lock nuts 19.
tion, the roller 3'! will recede from the cam face
Secured to the periphery of the neck 13 is a
until the obstruction is overcome, whenit will
wormgear segment 2| which is engaged by a
return to its appointed position on the cam and
worm 22 secured to a vertical shaft 23, which 55 the implement will descend to its previous level.
By virtue of the use of a single rigid arm, an
implement can be pushed as efliciently as it can
be drawn.
What I claim' as my invention is:
1. A tractor hoist comprising a base bracket
adapted for attachment to a tractor vehicle, a
face plate upon the base bracket, said face plate
having a horizontally disposed hinge lug and an
hinge connected to the lug, said block having an
arm member normally extending horizontally
outwards from the face plate and adapted for
connection to an implement and having a hy
draulic cylinder formed therein, said cylinder
having a ram adapted to extend from the hinged
end of the arm towards the face plate to engage
the face of the cam to raise the arm member.
arcuate cam below said lug, an arm member
hinge connected to the hinge lug, said arm mem 10
ber being adapted for connection to an imple
ment, a hydraulic cylinder carried below the
longitudinal axis of and substantially parallel to
The following references are of record in the
?le of this patent:
said arm member, a ram within said cylinder
adapted to bear upon and travel upon the face 15
of the cam to swing said arm in an upward di
rection, and means for admitting hydraulic ?uid
to the cylinder.
2. A tractor hoist comprising a base bracket
adapted for attachment to a tractor vehicle, a 20
face plate upon the base bracket, said face plate
having a horizontally disposed hinge lug and an
arcuate cam below said lug, a cylinder block
McDonald ____ __'___ June 5, 1888
Anderson ________ __ Nov. 1,
Mercier ________ __ June 27,
Merchant ________ __ June 8,
Janke ___________ __ Dec. 5,
Sherman ________ __ Feb. 5,
Без категории
Размер файла
239 Кб
Пожаловаться на содержимое документа