Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Reexamination Certificate
2000-09-22
2001-08-07
Banks, Derris H. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
Reexamination Certificate
active
06270056
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to floor jacks and more particularly to portable hydraulic floor jacks.
Conventional hydraulic floor jacks such as shown in
FIGS. 1 and 2
are known. In the embodiment shown in
FIG. 1
, the saddle member, which is generally indicated by the numeral
10
, includes a rest plate
11
and a stem
12
. The jack has a lifting base
13
that receives stem
12
in an opening
14
formed in base
13
. In this embodiment, saddle
10
is easily removed from and installed into opening
14
of lifting base
13
of the jack, but cannot be locked into opening
14
.
In the conventional floor jack shown in
FIG. 2
for example, a saddle
10
′ has a collar
15
′ formed at the free end of a stem
12
′. An axially extending opening
14
′ is formed in a lifting base
13
′. The axis of cylindrical symmetry of stem
12
′ and opening
14
′ is denoted in
FIG. 2
by the numeral
17
′. When saddle
10
′ is inserted with collar
15
′ and stem
12
′ into axial opening
14
′ formed in lifting base
13
′, a locking pin
16
′ is inserted into a hole that extends transversely through opening
14
′. The axis of cylindrical symmetry of the hole that receives the locking cylindrical symmetry of the hole that receives the locking pin
16
′, extends along a chord of the circle that defines the transverse shape of the opening
14
′ and thus is offset from the diameter of opening
14
′. This relative orientation allows the locking pin
16
′ to become disposed between collar
15
′ and the bottom surface of rest plate
11
′. Then, locking pin
16
′ is permanently attached in this position so as to prevent separation of saddle
10
′ from the floor jack shown in FIG.
2
. Locking pin
16
′ blocks collar
15
′ from axial movement out of opening
14
″. In order to assure that saddle
10
′ remains locked in the jack, locking pin
16
′ is in essence permanently installed in the hole that transversely intersects opening
14
′. The axis of cylindrical symmetry of locking pin
16
′ is denoted in
FIG. 2
by the numeral
18
and is disposed transversely with respect to axis
17
.
it would be desirable for a floor jack to be provided with a saddle that was easily removable as saddle
10
shown in
FIG. 1
, yet securely held in place as saddle
10
′ shown in FIG.
2
.
OBJECTS AND SUMMARY OF THE INVENTION
It is a principal object of the present invention to provide a floor jack wherein the saddle can be locked into the lifting base, yet is configured so as to be easily removable without requiring disassembly of other components of the jack.
Additional objects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
To achieve the objects and in accordance with the purpose of the invention, as embodied and broadly described herein, a portable floor jack has a lifting base provided with an axially disposed receiving opening. The jack further includes a saddle member having an axially extending stem. The axial stem of the saddle member of the floor jack is provided with an end collar having a flattened side surface. This permits the saddle member to be rotated to a singular orientation in which the flattened side surface of the end collar can bypass a locking pin that is permanently installed transversely of the receiving opening for the stem of the saddle member.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one embodiment of the invention and, together with the description, serve to explain the principles of the invention.
REFERENCES:
patent: D. 253696 (1979-12-01), Suzuki
patent: D. 272670 (1984-02-01), Tsujimura
patent: D. 285855 (1986-09-01), Persson
patent: D. 296598 (1988-07-01), Hung
patent: D. 358923 (1995-05-01), Hawkins
patent: 1563001 (1925-11-01), Weaver
patent: 2029022 (1936-01-01), Graham
patent: 3534640 (1970-10-01), Macy
patent: 4018421 (1977-04-01), Tallman
patent: 4131263 (1978-12-01), John
patent: 4212559 (1980-07-01), Persson
patent: 4241900 (1980-12-01), Okuda
patent: 4513950 (1985-04-01), Yamagishi
patent: 4596378 (1986-06-01), Liang et al.
patent: 4635902 (1987-01-01), Chou
patent: 5201494 (1993-04-01), Lundman
patent: 5261641 (1993-11-01), Ployer
patent: 6189863 (2001-02-01), Blackburn
Snap-on Catalog; pp. 279, E102; Kenosha, Wisconsin, 1993.
Sunex Automotive Tool & Equipment, p. 26, Greenville, SC, 1993.
MAC Tools Catalog; pp. 233, 234, 1993.
MATCO Hand Tools & Service Equipment Catalog, pp. 365, 366; 1993.
American Forge & Foundry Brochure, Model 3600 3 Ton Floor Jack, 1993.
Lincoln Jacks and Service Equipment Catalog 3000, pp. 5,6; 2/88, USA, 1993.
Blue-Point Model SJ002 2 Ton Capacity Service Jack Owner/User Instruction Manual, pp. 1-4, 1993.
Banks Derris H.
Dority & Manning P.A.
Sunex International Inc.
Wilson Lee
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