Adjustable support mechanism for a keyboard platform
First Claim
1. An improved adjustable support mechanism for a keyboard platform assembly of the type including a platform supported by said support mechanism, said platform associated with a work surface, said mechanism comprising in combination:
- a mounting plate for attachment to the underside of the work surface;
a slide assembly cooperative with the mounting plate and slidable between an extended position and a retracted position;
a first bracket means projecting downwardly from the slide assembly, said first bracket means including a first upper pivot and a first lower pivot;
a forward platform for support of a keyboard;
a second bracket means projecting downwardly from the forward platform, said second bracket means including a second upper pivot and a second lower pivot;
a first linkage arm between the first and second upper pivots;
a second linkage arm between the first and second lower pivots, whereby the linkage arms and pivots provide non-parallel unequal connecting linkages between the pivots, said arms defining means for tilting the platform from a horizontal orientation to a non-horizontal orientation as the platform is moved by the pivoting of the linkage arms;
spring means for biasing the linkage arms about the axes of pivots wherein the spring means comprises a compressible fluid cylinder connected between the pivots of the first and second bracket means;
wherein the first linkage arm comprises a pair of spaced arms and said second linkage arm comprises a single arm intermediate the spaced arms.
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Accused Products
Abstract
An adjustable platform support mechanism for a keyboard includes a platform and a connecting assembly for the platform. The connecting assembly is attached to the platform by means of first and second pivotal connecting arms. The quadrilateral formed by connecting the pivots is in all instances a non-parallelogram. Thereby the platform, when moved from an extended position to a storage position, is pivoted upwardly in order to increase the space available in the kneehole underneath the desk. The shelf also features an adjustable tilt mechanism associated with keyboard platform support bracket so that the operator will be able to adjust the platform to any one of a number of tilt positions.
232 Citations
28 Claims
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1. An improved adjustable support mechanism for a keyboard platform assembly of the type including a platform supported by said support mechanism, said platform associated with a work surface, said mechanism comprising in combination:
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a mounting plate for attachment to the underside of the work surface; a slide assembly cooperative with the mounting plate and slidable between an extended position and a retracted position; a first bracket means projecting downwardly from the slide assembly, said first bracket means including a first upper pivot and a first lower pivot; a forward platform for support of a keyboard; a second bracket means projecting downwardly from the forward platform, said second bracket means including a second upper pivot and a second lower pivot; a first linkage arm between the first and second upper pivots; a second linkage arm between the first and second lower pivots, whereby the linkage arms and pivots provide non-parallel unequal connecting linkages between the pivots, said arms defining means for tilting the platform from a horizontal orientation to a non-horizontal orientation as the platform is moved by the pivoting of the linkage arms; spring means for biasing the linkage arms about the axes of pivots wherein the spring means comprises a compressible fluid cylinder connected between the pivots of the first and second bracket means; wherein the first linkage arm comprises a pair of spaced arms and said second linkage arm comprises a single arm intermediate the spaced arms. - View Dependent Claims (2, 3)
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4. An improved adjustable support mechanism for a keyboard platform assembly of the type including a platform supported by said support mechanism, said platform associated with a work surface, said mechanism comprising in combination:
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a mounting plate for attachment to the underside of the work surface; a first bracket means projecting downwardly from the mounting plate, said first bracket means including a first upper pivot and a first lower pivot; a forward platform for support of a keyboard; a second bracket means projecting downwardly from the forward platform, said second bracket means including a second upper pivot and a second lower pivot; a first linkage arm between the first and second upper pivots, said first linkage arm having a first length; and a second linkage arm between the first and second lower pivots, said first and second linkage arms having different lengths, whereby the linkage arms and pivots provide unequal non-parallelogram connecting linkages between the pivots, said arms defining means for tilting the platform from a horizontal orientation to a non-horizontal orientation as the platform is moved by the pivoting of the linkage arms. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An improved adjustable support mechanism for a keyboard platform assembly of the type including a platform supported by said support mechanism, said platform associated with a work surface, said mechanism comprising in combination:
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a mounting plate for attachment to the underside of the work surface; a first bracket means projecting downwardly from the mounting plate, said first bracket means including a first upper pivot and a first lower pivot; a forward platform for support of a keyboard; a second bracket means projecting downwardly from the forward platform, said second bracket means including a second upper pivot and a second lower pivot; a first linkage arm between the first and second upper pivots; a second linkage arm between the first and second lower pivots, whereby the linkage arms and pivots provide non-parallel unequal connecting linkages between the pivots, said arms defining means for tilting the platform from a horizontal orientation to a non-horizontal orientation as the platform is moved by the pivoting of the linkage arms. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification