U.S. patent number 3,734,329 [Application Number 05/232,008] was granted by the patent office on 1973-05-22 for fork lift truck tines.
Invention is credited to Leonard Grelck.
United States Patent |
3,734,329 |
Grelck |
May 22, 1973 |
FORK LIFT TRUCK TINES
Abstract
Each of a pair of auxiliary members is pivotally mounted in a
channel formed at the free end of a corresponding one of the pair
of lift members of a fork lift truck for movement in planes
substantially perpendicular to the plane of the lift members.
Control devices on the lift members position the auxiliary members
in a selected one of a position coplanar with the lift members, a
position extending above the plane of the lift members
substantially perpendicularly thereto and a position extending
below the plane of the lift members substantially perpendicularly
thereto.
Inventors: |
Grelck; Leonard (Norwalk,
CA) |
Family
ID: |
22871506 |
Appl.
No.: |
05/232,008 |
Filed: |
March 6, 1972 |
Current U.S.
Class: |
414/785 |
Current CPC
Class: |
B66F
9/12 (20130101); B62B 2203/29 (20130101) |
Current International
Class: |
B66F
9/12 (20060101); B66f 009/06 () |
Field of
Search: |
;214/514,750
;254/133R,134R ;198/224 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Forlenza; Gerald M.
Assistant Examiner: Oresky; Lawrence J.
Claims
I claim:
1. The tines of a fork lift truck, comprising
a pair of spaced substantially parallel, substantially coplanarly
positioned lift members, each having a free end having a
longitudinally extending channel formed therein and opening on the
free end;
a pair of auxiliary members each member being pivotally mounted at
one end in the channel of a corresponding one of the lift members
for movement in planes substantially perpendicular to the plane of
the lift members; and
control means on the lift members for positioning the auxiliary
members in a selected one of a position coplanar with the lift
members, a position extending above the plane of the lift members
substantially perpendicularly thereto and a position extending
below the plane of the lift members substantially perpendicularly
thereto.
2. Tines as claimed in claim 1, wherein the control means rotates
the auxiliary members in a selected one of a clockwise and
counterclockwise direction.
Description
DESCRIPTION OF THE INVENTION
The present invention relates to a fork lift truck. More
particularly, the invention relates to the tines of a fork lift
truck.
The principal object of the invention is to provide new and
improved tines for fork lift trucks which permit normal lifting
operation, pushing and pulling, as desired, with facility.
In order that the invention may be readily carried into effect, it
will now be described with reference to the accompanying drawing,
wherein:
FIG. 1 is a perspective view of the front of a fork lift truck
having an embodiment of the tines of the invention;
FIGS. 2a, 2b and 2c are schematic diagrams of the tines of the
invention in different positions;
FIG. 3 is a perspective view of part of an embodiment of the tine
of the invention; and
FIG. 4 is a view, partly in section, taken along the lines 4--4, of
FIG. 3.
In the figures, the same components are identified by the same
reference numerals.
In FIG. 1, a fork lift truck 1 of any suitable type has a pair of
spaced substantially parallel, substantially coplanarly positioned
tines or lift members 2 and 3. Each of the lift members or tines 2
and 3 has a free end 4 and 5, respectively, (FIGS. 1 to 3).
The free end 4 of the tine 2 has a longitudinally extending channel
6 formed therein and opening on said free end (FIG. 1). The free
end 5 of the tine 3 has a longitudinally extending channel 7 formed
therein and opening on said free end (FIGS. 1, 3 and 4).
An auxiliary member is pivotally mounted in the channel of each of
the lift members or tines 2 and 3, although only the tine 3 is
described hereinafter. Both tines 2 and 3 are substantially
identical. An auxiliary member 8 is pivotally mounted in the
channel 7 of the lift member 3 (FIGS. 2b, 2c, 3 and 4) for movement
in a plane substantially perpendicular to the plane of the lift
members 2 and 3.
Each of the tines 2 and 3 has a control device thereon for
positioning the corresponding auxiliary member, although only that
of the tine 3 is described herein. The tine 3 has a control device
9 thereon (FIG. 3) for positioning the auxiliary member 8 in a
selected desired position. The control device 9 may comprise any
suitable driving device such as, for example, hydraulic,
electromagnetic, mechanical, or the like, means.
The control device 9 positions the auxiliary member 8 in a position
coplanar with the lift members 2 and 3, as shown in FIGS. 2a, 3 and
4. The control device 9 rotates the auxiliary member 8 in a
clockwise direction to a position extending above the plane of the
lift members 2 and 3 substantially perpendicularly thereto, as
shown in FIG. 2b. In this position of the auxiliary members, the
fork lift truck may pull a pallet load.
The control device 9 rotates the auxiliary member 8 in a
counterclockwise direction to a position extending below the plane
of the lift members 2 and 3 substantially perpendicular thereto, as
shown in FIG. 2c. In this position of the auxiliary members, the
fork lift truck may push a load. Each time the control device 9
moves the auxiliary member 8, the control device of the tine 2
moves the auxiliary member 8 said tine to the same position.
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