Claims
- 1. A corkscrew comprising a handle and a helically-shaped flat screw part with the outside aligning with a conical envelope surface with its smallest diameter near the handle, the terminating end remote from the handle being arranged radially and perpendicular to the center axis of the corkscrew, the screw part having a decreasing diameter toward the end from the point where the screw part is twisted from a position aligned with a conical surface to a position perpendicular to the center axis, and a center peg secured to the handle, concentric to and spaced from the screw part outside said handle and extending at least to the end of the screw part.
- 2. Corkscrew according to claim 1, characterized in that the conical shape in the area near the end of the screw part, opposite the handle, has a decreasing diameter.
- 3. Corkscrew according to claim 1, characterized in the screw part having a substantially circular cross section.
- 4. A corkscrew comprising a handle and a helically shaped screw part, characterized in that the helically shaped part is formed as an extended conical spiral having its smallest diameter near the handle, and having a center peg secured to the handle, concentric to and spaced from the screw part throughout its entire length outside said handle and extending at least to the end of the screw part.
- 5. Corkscrew comprising a handle and a helically-shaped screw part, characterized in the helically-shaped part (2) being formed as an extended spiral having its smallest diameter near the handle, and being flat with the outside aligning with a conical envelope surface, the terminating end (3) remote from the handle also being flat but being arranged radially and perpendicularly to the center axis of the corkscrew, the screw part having decreasing diameter towards the end (3) from the point where the screw part is twisted from a position aligned with the conical surface, to a position perpendicular to the center axis, and a center peg (1) being secured to the handle, concentric to the screw part (2).
Priority Claims (2)
| Number |
Date |
Country |
Kind |
| 892027 |
May 1989 |
NOX |
|
| 894457 |
Nov 1989 |
NOX |
|
Parent Case Info
This application is a continuation-in-part of application Ser. No. 411,898, filed Sept. 25, 1989, now abandoned.
The present invention is related to a corkscrew.
Throughout the times, a plurality of tools has been developed for pulling a cork out of a bottle's neck. The most commonly used design is the well known helically shaped screw which is to be screwed into the middle or near the middle of the cork, normally through a substantial part of the cork and often through the full length of the cork, which very easily breaks out parts of the cork which fall down into the bottle.
By screwing a traditional corkscrew into a cork, the cork mass is compressed by the corkscrew in such a way that the pressure of the cork against the wall of a bottle neck increases considerably. when the cork by means of the corkscrew is pulled out, an additional force has to be overcome created by the friction between the cork and the wall and the additional pressure caused by the compression of the cork. The volume of the cork is increased approximately 15% when the corkscrew is screwed in whereby additionally the grip of the corkscrew in the cork is limited to approximately 30 to 40% of the volume of the cork, positioned in the center of the cork which thereby in fact is remote from the circumference of the cork where the friction forces are acting. From time to time, this fact leads to breaking of the cork, especially if the cork has poor quality.
It is therefore an objective for the present invention to provide a corkscrew where the friction forces between the cork and the wall of the bottle neck are decreased instead of increased as the case is by known corkscrews. It is a further purpose of the present invention displacing the grip of the corkscrew in the cork from the center of the cork, nearer to the circumference of the cork thereby simultaneously to displace the forces from the corkscrew nearer to the friction forces between the cork and the bottle neck.
The above-mentioned objectives are achieved with the corkscrew according to the present invention as defined by the features stated in the patent claim.
US Referenced Citations (4)
Foreign Referenced Citations (1)
| Number |
Date |
Country |
| 938167 |
Jan 1956 |
DEX |
Continuation in Parts (1)
|
Number |
Date |
Country |
| Parent |
411898 |
Sep 1989 |
|
Patent Grant
5031486
