Stroller

Claim 2

A stroller, comprising: a wheeled carriage frame; a pair of hollow upwardly inclining rear frame supports mounted to the wheeled carriage frame; a pair of hollow connecting pieces telescopically connected to said rear frame supports, each of said connecting pieces having a forked end opposite each of said rear frame supports, said forked end having a hollow first cylindrical member and a bearing member spaced from said first cylindrical member, said first cylindrical member having an inner surface formed with first gear teeth, said bearing member having a central first through hole, said first cylindrical member and said bearing member having an axis transverse to said rear frame supports; a substantially U-shaped handle having a pair of arm portions and a pair of hollow second cylindrical members respectively integrated with said arm portions, each of said second cylindrical members similarly having an inner surface formed with second gear teeth and an axis transverse to said arm portions, each of said second cylindrical members extending into a space formed between said first cylindrical member and said bearing member of one of said rear frame supports; a pair of movable control pieces, each of said movable control pieces being disposed in said first and said second cylindrical members, each of said movable control pieces having a hollow cylindrical wall with an inner end, an outer end and external gear teeth formed adjacent said inner end, said external gear teeth engaging said first and said second gear teeth but releasable from one of said first and said second gear teeth; and a first biasing means urging each of said movable control pieces so as to move said external gear teeth to an engaging position relative to both of said first and said second gear teeth; whereby, said U-shaped handle can be rotated relative to said rear frame supports when said movable control pieces are moved against the action of said first biasing means, wherein said outer end of said cylindrical wall of each of said movable control pieces is a closed end, each of said movable control pieces further having an axial shaft projecting inwardly from an inner surface of said outer end of said cylindrical wall and extending past said inner end of said cylindrical wall into said central first through hole of said bearing member of one of said connecting pieces, wherein said first biasing means is a compression spring disposed around said axial shaft of each of said movable control pieces between said outer end of said cylindrical wall and said bearing member of one of said connecting pieces and wherein each of said connecting pieces further comprises a C-shaped locking ring disposed between said first cylindrical member and said cylindrical wall of one of said movable control pieces adjacent said outer end of said cylindrical wall so as to prevent the release of said movable control pieces.

Claim 3

A stroller, comprising: a wheeled carriage frame; a pair of hollow upwardly inclining rear frame supports mounted to the wheeled carriage frame; a pair of hollow connecting pieces telescopically connected to said rear frame supports, each of said connecting pieces having a forked end opposite each of said rear frame supports, said forked end having a hollow first cylindrical member and a bearing member spaced from said first cylindrical member, said first cylindrical member having an inner surface formed with first gear teeth, said bearing member having a central first through hole, said first cylindrical member and said bearing member having an axis transverse to said rear frame supports; a substantially U-shaped handle having a pair of arm portions and a pair of hollow second cylindrical members respectively integrated with said arm portions, each of said second cylindrical members similarly having an inner surface formed with second gear teeth and an axis transverse to said arm portions, each of said second cylindrical members extending into a space formed between said first cylindrical member and said bearing member of one of said rear frame supports; a pair of movable control pieces, each of said movable control pieces being disposed in said first and said second cylindrical members, each of said movable control pieces having a cylindrical wall with an inner end, an outer end and external gear teeth formed adjacent said inner end, said external gear teeth engaging said first and said second gear teeth but releasable from one of said first and said second gear teeth; and a first biasing means urging each of said movable control pieces so as to move said external gear teeth to an engaging position relative to both of said first and said second gear teeth; whereby, said U-shaped handle can be rotated relative to said rear frame supports when said movable control pieces are moved against the action of said first biasing means wherein each of said connecting pieces has an elongated transverse curved slot formed adjacent to each of said rear frame supports; each of said rear frame supports having an elongated axial opening communicated with a plurality of spaced transverse notches to be adjustably aligned with said transverse curved slot; said stroller further comprising a control panel pivotably attached to each of the said connecting pieces, said control panel having a stub member projecting into said transverse curved slot and said axial opening, said control panel being rotatable to move said stub member into said transverse curved slot between a first position in which said stub member engages one of said transverse notches and a second position in which said stub member is in said axial opening; and a second biasing means urging said stub member towards said first position.

Claim 4

A stroller, comprising: a wheeled carriage frame; a pair of hollow upwardly inclining rear frame supports mounted to the wheeled carriage frame; a pair of hollow connecting pieces telescopically connected to said rear frame supports, each of said connecting pieces having a forked end opposite each of said rear frame supports, said forked end having a hollow first cylindrical member and a bearing member spaced from said first cylindrical member, said first cylindrical member having an inner surface formed with first gear teeth, said bearing member having a central first through hole, said first cylindrical member and said bearing member having an axis transverse to said rear frame supports; a substantially U-shaped handle having a pair of arm portions and a pair of hollow second cylindrical members respectively integrated with said arm portions, each of said second cylindrical members similarly having an inner surface formed with second gear teeth and an axis transverse to said arm portions, each of said second cylindrical members extending into a space formed between said first cylindrical member and said bearing member of one of said rear frame supports; a pair of movable control pieces, each of said movable control pieces being disposed in said first and said second cylindrical members, each of said movable control pieces having a cylindrical wall with an inner end, an outer end and external gear teeth formed adjacent said inner end, said external gear teeth engaging said first and said second gear teeth but releasable from one of said first and said second gear teeth; and a first biasing means urging each of said movable control pieces so as to move said external gear teeth to an engaging position relative to both of said first and said second gear teeth; whereby, said U-shaped handle can be rotated relative to said rear frame supports when said movable control pieces are moved against the action of said first biasing means wherein each of said connecting pieces has an elongated transverse curved slot formed adjacent to each of said rear frame supports; each of said rear frame supports having an elongated axial opening communicated with a plurality of spaced transverse notches to be adjustably aligned with said transverse curved slot; said stroller further comprising a control panel pivotably attached to each of the said connecting pieces, said control panel having a stub member projecting into said transverse curved slot and said axial opening, said control panel being rotatable to move said stub member into said transverse curved slot between a first position in which said stub member engages one of said transverse notches and a second position in which said stub member is in said axial opening; and a second biasing means urging said stub member towards said first position.

Claim 5

A stroller comprising: a wheeled carriage frame; a pair of hollow upwardly inclining rear frame supports mounted to the wheeled carriage frame; a pair of hollow connecting pieces telescopically connected to said rear frame supports, each of said connecting pieces having a forked end opposite each of said rear frame supports, said forked end having a hollow first cylindrical member and a bearing member spaced from said first cylindrical member, said first cylindrical member having an inner surface formed with first gear teeth, said bearing member having a central first through hole, said first cylindrical member and said bearing member having an axis transverse to said rear frame supports; a substantially U-shaped handle having a pair of arm portions and a pair of hollow second cylindrical members respectively integrated with said arm portions, each of said second cylindrical members similarly having an inner surface formed with second gear teeth and an axis transverse to said arm portions, each of said second cylindrical members extending into a space formed between said first cylindrical member and said bearing member of one of said rear frame supports; a pair of movable control pieces, each of said movable control pieces being disposed in said first and said second cylindrical members, each of said movable control pieces having a cylindrical wall with an inner end, an outer end and external gear teeth formed adjacent said inner end, said external gear teeth engaging said first and said second gear teeth but releasable from one of said first and said second gear teeth; and a first biasing means urging each of said movable control pieces so as to move said external gear teeth to an engaging position relative to both of said first and said second gear teeth; whereby, said U-shaped handle can be rotated relative to said rear frame supports when said movable control pieces are moved against the action of said first biasing means further comprising a pair of arm rests, said rear frame supports being movable between two positions on said arm rests, each of said rear frame supports having a movable hook body attached thereto to selectively lock said rear frame support to said arm rest at one of said two positions, each of said rear frame supports further having an elongated axial slot adjacent to said movable hook body, said movable hook body having a transverse rod extending into said elongated axial slot in one of said rear frame supports, said transverse rod being vertically movable inside said elongated axial slot, said stroller further including a third biasing means urging said transverse rod downward to place said movable hook body in a locking position against said arm rest, each of said connecting pieces further having a handle lever hinged thereto and a transmitting cord interconnecting said handle lever and said transverse rod, said handle lever moving said movable hook body away from said locking position by means of said transmitting cord when said handle lever is operated.

Claim 6

A stroller comprising: a wheeled carriage frame; a pair of hollow upwardly inclining rear frame supports mounted to the wheeled carriage frame; a pair of hollow connecting pieces telescopically connected to said rear frame supports, each of said connecting pieces having a forked end opposite each of said rear frame supports, said forked end having a hollow first cylindrical member and a bearing member spaced from said first cylindrical member, said first cylindrical member having an inner surface formed with first gear teeth, said bearing member having a central first through hole, said first cylindrical member and said bearing member having an axis transverse to said rear frame supports; a substantially U-shaped handle having a pair of arm portions and a pair of hollow second cylindrical members respectively integrated with said arm portions, each of said second cylindrical members similarly having an inner surface formed with second gear teeth and an axis transverse to said arm portions, each of said second cylindrical members extending into a space formed between said first cylindrical member and said bearing member of one of said rear frame supports; a pair of movable control pieces, each of said movable control pieces being disposed in said first and said second cylindrical members, each of said movable control pieces having a cylindrical wall with an inner end, an outer end and external gear teeth formed adjacent said inner end, said external gear teeth engaging said first and said second gear teeth but releasable from one of said first and said second gear teeth; and a first biasing means urging each of said movable control pieces so as to move said external gear teeth to an engaging position relative to both of said first and said second gear teeth; whereby, said U-shaped handle can be rotated relative to said rear frame supports when said movable control pieces are moved against the action of said first biasing means further comprising a pair of arm rests, said rear frame supports being movable between two positions on said arm rests, each of said rear frame supports having a movable hook body attached thereto to selectively lock said rear frame support to said arm rest at one of said two positions, each of said rear frame supports further having an elongated axial slot adjacent to said movable hook body, said movable hook body having a transverse rod extending into said elongated axial slot in one of said rear frame supports, said transverse rod being vertically movable inside said elongated axial slot, said stroller further including a third biasing means urging said transverse rod downward to place said movable hook body in a locking position against said arm rest, each of said connecting pieces further having a handle lever hinged thereto and a transmitting cord interconnecting said handle lever and said transverse rod, said handle lever moving said movable hook body away from said locking position by means of said transmitting cord when said handle lever is operated.