Pressure vessel

Details Pressure vessel Pressure vessel

2000-11-07

2001-07-10

Simone, Timothy F. (Department: 1761)

Foods and beverages: apparatus

Cooking

Intercontrol or safety control

C099S403000, C220S314000, C220S316000, C220S325000, C220S912000

Reexamination Certificate

active

06257124

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a pressure vessel having a control device for opening and closing of locking jaws mounted on a cover of the pressure vessel.
2. Description of Related Art
As shown in
FIG. 7
, a pressure cooking vessel as disclosed in published International Application 92/03090 comprises a cover (
40
), two jaws (
41
), a control button (
42
) and a container (
43
). Wherein the jaws (
41
) are diametrically opposite one another relative to the longitudinal axis of the vessel, and mounted on the cover (
40
) for radial movement displaced via the control button (
42
) which is mounted in the center of the cover (
40
) to move axially. The control button (
42
) has an engagement portion (
421
) which is formed at a lower end of the control button (
42
) and specially shaped to act on inclined surfaces (
411
) fixed to the jaws (
41
) in order to displace the jaws (
41
) radially during axial displacement of the control button (
42
). Thus an axial movement of the control button (
42
) is transformed into a radial displacement movement of the jaws (
41
) between a closing position and an opening position. When in the closing position, the jaws (
41
) tightly grip the peripheral edge of the container (
43
) in order to hermetically seal the vessel. Conversely, the jaws (
41
) can occupy an unlocking position permitting opening of the vessel.
With reference to
FIGS. 8
to
10
, another pressure vessel of U.S. Pat. No. 5,613,424 comprises a cover (
60
), a container (
61
) and a control device (
50
) including two jaws (
51
) and a control element (
52
). The jaws (
51
) are diametrically opposite one another relative to the longitudinal axis of the vessel, and mounted on the cover (
60
) for radial movement displacement. The control element (
52
) is fixed with a triangular member (
521
) movable in a radial direction perpendicular to the radial direction of movement of the jaws (
51
). When the control element (
52
) is pushed or pulled manually along the radial direction, flanks of the triangular member (
521
) are engaged on the jaws (
51
) to progressively displace the jaws (
51
) apart or disengage with the jaws (
51
) to let the jaws (
51
) grip the peripheral edge of the container (
61
) tightly.
However, the above described conventional pressure vessels have the following defects;
1. the structure of the control device for the conventional pressure vessel is too complicated, which leads to high production costs;
2. as the control device for the conventional pressure vessel requires a series of pieces which are movable relative to one another, a jamming risk may be provoked, so that the reliability of operation of the controlling device is not ensured;
3. the operation of the conventional pressure vessel requires a lot of physical effort from a user, which offers less operating safety and inconvenience from the ergonomic standpoint.
Therefore, it is an objective of the invention to provide a pressure vessel to mitigate and/or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
The main object of the present invention is to provide a pressure vessel with a control device for closing and opening of a cover of the pressure vessel. The control device comprises a knob pivotally mounted on the cover, at least two driving arms each fixed with one jaw at an outer end thereof and formed with an engagement post at an inner end thereof, and a rotary plate co-axially fixed at a lower end of the knob and formed with at least two rotary drivers corresponding to the engagement posts of the driving arms. Whereby when the knob is turned manually, the rotary plate is rotated with the knob, so that the engagement posts of the driving arms driven by the relative rotary drivers are progressively displaced in radial directions. In this way the driving arms are displaced between a locking position in which the cover is locked to the pressure vessel and an unlocking position in which the cover can be removed from the pressure vessel. As the structure of the control device of the invention is simple and low precision parts of the control device are required, the production costs are obviously low.
Another object of the present invention is to provide the pressure vessel with the control device for closing and opening of the cover of the pressure vessel whereby the reliability of the control device of the pressure vessel is good.
A further object of the present invention is to provide the pressure vessel with the control device for closing and opening of the cover of the pressure vessel whereby the safety and ergonomics of the operation of the pressure vessel are good.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 2549387 (1951-04-01), Richeson
patent: 4024982 (1977-05-01), Schultz
patent: 4135640 (1979-01-01), MacQuilkin et al.
patent: 4161260 (1979-07-01), Lagostina
patent: 4162741 (1979-07-01), Walker et al.
patent: 4574988 (1986-03-01), Karliner
patent: 4711366 (1987-12-01), Chen
patent: 4733795 (1988-03-01), Boehm
patent: 4796776 (1989-01-01), Dalquist et al.
patent: 4932550 (1990-06-01), Moucha
patent: 5048400 (1991-09-01), Ueda et al.
patent: 5370257 (1994-12-01), Chameroy et al.
patent: 5678721 (1997-10-01), Cartigny et al.

Affiliated with

Also associated with

Rating

Pressure vessel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure vessel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure vessel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2543452