Corkscrew

Claim 2

A corkscrew comprising, in combination, an elongated spindle having a longitudinal axis, a cork-engaging helix at a leading end portion, and an external thread at a trailing end portion thereof; means for supporting said spindle on a respective container during turning the latter about said longitudinal axis thus displacing the same longitudinally thereof between a retracted and an extended position, including a support having an abutment surface; a threaded member having engaging portions which engage said thread of said spindle, said threaded member being a nut surrounding said trailing end portion of said spindle means for turning said threaded member about said longitudinal axis and including a pair of projections which extend radially outwardly from said nut at opposite sides thereof; a locking element mounted on said threaded member for pivoting relative thereto about a pivoting axis normal to said longitudinal axis between a locking position in which it connects said threaded member to said spindle for joint turning and displacement toward said extended position, and an unlocking position in which it releases said spindle for displacement relative to said threaded member toward said retracted position, and having an actuating portion which engages said abutment surface of said support as said spindle approaches said extended position thereof to pivot said locking element from said locking to said unlocking position; and biasing means arranged between said locking element and at least one of said projections and urging said locking element toward said locking position thereof and being tensioned by a counterforce applied thereto when said actuating portion engages said abutment surface and an operator further rotates said turning means to permit said locking element to pivot relative to said threaded member, thereby releasing said spindle for displacement thereof toward said retracted position.

Claim 3

A combination as defined in claim 1, wherein said biasing means includes a helical torsion spring having one end connected to said locking element and another end connected to said one projection.

Claim 4

A combination as defined in claim 2, wherein said one projection includes a core element rigid with said nut and a sleeve surrounding said core element and rigidly connected thereto; and wherein said other end of said torsion spring is attached to said sleeve.

Claim 5

A combination as defined in claim 1, wherein said support is substantially U-shaped having a bight and two legs extending from said bight toward said one end portion of said spindle; and wherein said supporting means further includes a supporting ring adapted to engage the respective container and mounted on free ends of said legs which are remote from said bight.

Claim 6

A combination as defined in claim 4, wherein said support is tubular and said free ends of said legs thereof have receiving openings for partly receiving said supporting ring.

Claim 7

A combination as defined in claim 5, wherein said supporting ring is substantially U-shaped in longitudinal section, having arms which are press-fittingly received in said receiving openings.

Claim 8

A combination as defined in claim 6, wherein said arms have ribs at their respective circumferences which are juxtaposed with said free ends of said legs within said receiving openings.

Claim 9

A combination as defined in claim 7, wherein said arms are elongated; and wherein said ribs extend longitudinally of said arms.

Claim 10

A combination as defined in claim 4, wherein said supporting ring includes a supporting body and an elastic ring mounted on said supporting body and adapted to contact the respective container.

Claim 11

A combination as defined in claim 9, wherein said supporting body has an inner surface which bounds an opening having a smaller cross-section remote from than at that face of said supporting body which faces the respective container; and wherein said elastic ring rests against said surface at the region of the smaller cross-section of said opening.

Claim 12

A combination as defined in claim 10, wherein said elastic ring has a passage conically converging away from said face and adapted to embrace a neck of the respective container; and wherein the smallest cross-section of said passage is smaller than that of the neck.

Claim 13

A combination as defined in claim 10, wherein said supporting body has at least one recess in said opening; and wherein said elastic ring has at least one elastically yieldable tongue engaging in said recess.

Claim 14

A corkscrew, comprising an elongated spindle having a longitudinal axis, a cork engaging helix at a leading end portion and an external thread at a trailing end portion thereof; means for supporting said spindle on a respective container for turning about said longitudinal axis, including a tubular support of substantially U-shaped cross-section having bight and two legs extending from said bight toward said leading end of said spindle, said legs being provided with receiving openings remote from said bight; a threaded member having engaging portions which engage said thread of said spindle, said threaded member being a nut surrounding said trailing end portions of said spindle; an insertable supporting ring adapted to engage the respective container and being closely received in said opening of said legs, thereby contacting an inner wall of the respective tubular leg; means for turning said threaded member about said longitudinal axis and including a pair of projections which extend radially outwardly from said nut at opposite sides thereof; a locking element mounted on said threaded member for pivoting relative thereto about a pivoting axis normal to said longitudinal axis between a locking position in which it connects said threaded member to said spindle for joint turning and displacement toward said extended position, and an unlocking position in which it releases said spindle for displacement relative to said threaded member toward said retracted position, and having an actuating portion which engages said abutment surface of said support as said spindle approaches said extended position thereof to pivot said locking element from said locking to said unlocking position; and biasing means arranged between said locking element and at least one of said projections and urging said locking element toward said locking position thereof and being tensioned by a counterforce applied thereto when said actuating portion engages said abutment surface and an operator further rotates said turning means to permit said locking element to pivot relative to said threaded member, thereby releasing said spindle for displacement thereof toward said retracted position.

Claim 15

A corkscrew, comprising an elongated spindle having a longitudinal axis, a cork engaging helix at a leading end portion and an external thread at a trailing end portion thereof; means for supporting said spindle on a respective container for turning about said longitudinal axis, including a tubular support of substantially U-shaped cross-section having bight and two legs extending from said bight toward said leading end of said spindle, said legs being provided with receiving openings remote from said bight; a threaded member having engaging portions which engage said thread of said spindle, said threaded member being a nut surrounding said trailing end portions of said spindle; an insertable supporting ring adapted to engage the respective container and being closely received in said opening of said legs, thereby contacting an inner wall of the respective tubular leg; means for turning said threaded member about said longitudinal axis and including a pair of projections which extend radially outwardly from said nut at opposite sides thereof; a locking element mounted on said threaded member for pivoting relative thereto about a pivoting axis normal to said longitudinal axis between a locking position in which it connects said threaded member to said spindle for joint turning and displacement toward said extended position, and an unlocking position in which it releases said spindle for displacement relative to said threaded member toward said retracted position, and having an actuating portion which engages said abutment surface of said support as said spindle approaches said extended position thereof to pivot said locking element from said locking to said unlocking position; and biasing means arranged between said locking element and at least one of said projections and urging said locking element toward said locking position thereof and being tensioned by a counterforce applied thereto when said actuating portion engages said abutment surface and an operator further rotates said turning means to permit said locking element to pivot relative to said threaded member, thereby releasing said spindle for displacement thereof toward said retracted position.