Linkage system
First Claim
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1. A linkage system comprising:
- a first element defining a guide slot and a control slot;
a second element;
a linkage arm respectively connected at a first end and a second end to the first and second elements, the linkage arm including at the first end a first hinge pin for slidably inter-engaging the guide slot and spaced apart from said first hinge pin, a second hinge pin for slidably inter-engaging the control slot, whereby relative movement between the hinge pins and the guide slot and the control slot respectively provides for predetermined non-arcuate relative movement between the first and second elements; and
locking formations for selectively engaging one of the hinge pins for maintaining the first and second elements in one of a number of relative positions, said locking formations extending into at least one of the control slot and the guide slot.
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Abstract
A linkage system (1) for connecting a first element (2) and a second element (3) includes a linkage arm (4) respectively connected at a first end and a second end (5, 6) respectively to the first and second elements. Arm (4) includes at end (5) two spaced apart engagement formations, pin (7) and pin (8). These pins slidably inter-engage on the first element a guide slot (9) and a control slot (10) respectively. Relative movement between pins (7, 8) and the guide and control slot (9, 10) respectively provides predetermined non-arcuate relative movement between elements (2, 3).
117 Citations
17 Claims
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1. A linkage system comprising:
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a first element defining a guide slot and a control slot; a second element; a linkage arm respectively connected at a first end and a second end to the first and second elements, the linkage arm including at the first end a first hinge pin for slidably inter-engaging the guide slot and spaced apart from said first hinge pin, a second hinge pin for slidably inter-engaging the control slot, whereby relative movement between the hinge pins and the guide slot and the control slot respectively provides for predetermined non-arcuate relative movement between the first and second elements; and locking formations for selectively engaging one of the hinge pins for maintaining the first and second elements in one of a number of relative positions, said locking formations extending into at least one of the control slot and the guide slot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A keyboard support apparatus comprising:
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a first element having a guide formation and a control formation; a second element; a linkage arm respectively connected at a first end and a second end to the first and second elements, the linkage arm including at the first end a first engagement formation for slidably interengaging the guide formation and spaced apart from said first engagement formation, a second engagement formation for slidably engaging the control formation, whereby relative movement between the engagement formations and the guide formation and the control formation respectively provides for predetermined non-arcuate relative movement between the first and second elements; and wherein one of the first and second elements comprises a support bracket for attachment to a desk surface, and the other one of the first and second elements comprises a keyboard support bracket for attachment to a keyboard support, whereby, in use, the keyboard support is movable between a raised configuration and a lowered configuration with respect to the desk surface. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification