Adjustable handlebar stem using a locking pin system
First Claim
1. An adjustable handlebar stem apparatus for adjusting the position of handlebars, said apparatus comprising:
- a base member, the base member having a first pivot point and a second pivot point;
an upper link pivotally attached to the base member, the upper link having a first end and a second end, the first end being attached to the first pivot point of the base member, the upper link having a tracking slot formed therein with side portions on either side of the tracking slot;
a lower link pivotally attached to the base member, the lower link having first end and a second end, the first end being attached to the second pivot point of the base member, the lower link having a protrusion formed thereon and extending into the tracking slot of the upper link;
an intermediate member pivotally attached to the upper link and the lower link, the intermediate member having a first pivot point and a second pivot point, the first pivot point of the intermediate member being attached to the second end of the upper link and the second pivot point of the intermediate member being attached to the second end of the lower link; and
a locking means for locking the upper link and the lower link in a fixed, stable position with respect to the base member and the intermediate member, the locking means comprising a plurality of indexing holes formed in the protrusion of the lower link, and a locking pin movably disposed in a bore formed in the upper link and including means for retractably engaging one of the plurality of indexing holes, the locking means providing i) a locked position when the locking pin engages one of the plurality of indexing holes and ii) an unlocked position when retracted from the hole, the locking pin extending through one of the indexing holes on the protrusion of the lower link and into both side portions of the upper link when in the locked position.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus for adjusting the position of a handlebar on a bicycle or the like having a base member, an upper link, a lower link, and a intermediate member forming a parallelogram type link. A protrusion formed on the lower link extends into and slidably contacts a tracking slot formed in the upper link. A locking means for fixing the upper and lower links has a locking pin disposed in a bore formed in the upper link and extending through one of a plurality of holes formed in the protrusion of the lower link. The locking pin defines a locked position when extending into one of the plurality of holes and an unlocked position when released. The pin is biased in the locked position. A release lever is disposed on the upper link having a operating portion for grasping by a rider and a locking pin portion for engaging the locking pin.
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Citations
21 Claims
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1. An adjustable handlebar stem apparatus for adjusting the position of handlebars, said apparatus comprising:
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a base member, the base member having a first pivot point and a second pivot point; an upper link pivotally attached to the base member, the upper link having a first end and a second end, the first end being attached to the first pivot point of the base member, the upper link having a tracking slot formed therein with side portions on either side of the tracking slot; a lower link pivotally attached to the base member, the lower link having first end and a second end, the first end being attached to the second pivot point of the base member, the lower link having a protrusion formed thereon and extending into the tracking slot of the upper link; an intermediate member pivotally attached to the upper link and the lower link, the intermediate member having a first pivot point and a second pivot point, the first pivot point of the intermediate member being attached to the second end of the upper link and the second pivot point of the intermediate member being attached to the second end of the lower link; and a locking means for locking the upper link and the lower link in a fixed, stable position with respect to the base member and the intermediate member, the locking means comprising a plurality of indexing holes formed in the protrusion of the lower link, and a locking pin movably disposed in a bore formed in the upper link and including means for retractably engaging one of the plurality of indexing holes, the locking means providing i) a locked position when the locking pin engages one of the plurality of indexing holes and ii) an unlocked position when retracted from the hole, the locking pin extending through one of the indexing holes on the protrusion of the lower link and into both side portions of the upper link when in the locked position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An adjustable handlebar stem apparatus for adjusting the position of handlebars, said apparatus comprising:
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a four-bar link having a base member, an upper link and a lower link pivotally attached to the base member at separate pivot points, and an intermediate member pivotally attached to the upper link and the lower link at separate pivot points; a tracking slot formed in the upper link; a protrusion formed in the lower link and extending into the tracking slot, the protrusion extending to an upper link axis which connects the pivot points of the upper link; and a locking means for locking the upper link and the lower link. - View Dependent Claims (17, 18)
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19. An adjustable handlebar stem apparatus for adjusting the position of handlebars, said apparatus comprising:
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a base member, the base member having a first pivot point and a second pivot point; an upper link pivotally attached to the base member, the upper link having a first end and a second end, the first end being attached to the first pivot point of the base member, the upper link having a tracking slot formed therein; a lower link pivotally attached to the base member, the lower link having a first end and a second end, the first end being attached to the second pivot point of the base member, the lower link having a protrusion formed thereon and extending into the tracking slot of the upper link; an intermediate member pivotally attached to the upper link and the lower link, the intermediate member having a first pivot point and a second pivot point, the first pivot point of the intermediate member being attached to the second end of the upper link and the second pivot point of the intermediate member being attached to the second end of the lower link; and a locking means for locking the upper link and the lower link in a fixed, stable position with respect to the base member and the intermediate member; wherein the protrusion extends to an upper link axis which connects the first pivot point of the base member and the first pivot point of the intermediate member. - View Dependent Claims (20, 21)
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Specification