Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Insulated handle – Knob-type handle
Reexamination Certificate
2002-04-05
2003-11-04
Knight, Anthony (Department: 3677)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Insulated handle
Knob-type handle
C016S414000, C016S417000, C251S288000
Reexamination Certificate
active
06640390
ABSTRACT:
RELATED U.S. APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
The present invention relates generally to a valve knob, and more particularly to a confinement structure of the valve knob.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, the conventional valve knob
10
is provided in a fastening portion
11
thereof with two stop edges
12
and
13
, which are perpendicular to each other. The valve body
14
is provided with a tubular projection
15
which is provided in one side with an arresting block
16
. The valve knob
10
is turned an angle of 90 degrees so as to open or close the valve, as shown in FIG.
2
. The valve knob
10
is confined by means of the two stop edges
12
and
13
is conjunction with the arresting block
16
of the valve body
14
.
As shown in
FIGS. 3 and 4
, the conventional valve knob
10
can be easily assembled with the valve body
14
in a wrong direction such that the stop edges
12
and
13
of the valve knob
10
are incorrectly situated, thereby resulting in an increase in rejection rate.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a valve knob which is free of the deficiency of the prior art valve knob described above.
The valve knob of the present invention is provided in the fastening portion with two symmetrical confinement slots, each having a radian of 90 degrees. Either one of the two symmetrical confinement slots can be used to confine the positions of the valve knob in conjunction with the arresting block of the valve body, thereby enhancing the assembly efficiency of the valve.
REFERENCES:
patent: 4499630 (1985-02-01), Harris et al.
patent: 5048792 (1991-09-01), Fischer
patent: 5123123 (1992-06-01), Hart et al.
patent: 5345838 (1994-09-01), Howie, Jr.
patent: 5568708 (1996-10-01), Kassardjian et al.
patent: 5857242 (1999-01-01), Pizzo et al.
patent: 5918626 (1999-07-01), Strong et al.
patent: 6014984 (2000-01-01), Herron
patent: 6056201 (2000-05-01), Ta
patent: 6073647 (2000-06-01), Cook et al.
patent: 6125511 (2000-10-01), Woods
Harrison & Egbert
Jackson André L.
Knight Anthony
LandOfFree
Structure for confining a valve knob does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure for confining a valve knob, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure for confining a valve knob will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3150171