Stand up desk having adjustable heights

Abstract

An adjustable stand up desk includes an upper desk surface and a second desk surface connected to the upper desk surface. The desk further includes a base with at least two channels and a pair of positioning legs configured to sit on an existing desk. A folding leg assembly connects the base to the first desk surface. The folding leg assembly includes a first pair of legs that extends between the first desk surface and the base, and a second pair of legs that extends between the first desk surface and the base. Each leg of the first and second pairs of legs is configured to move within the at least two channels of the base, such that the adjustable stand up desk can be adjusted from at least a closed position to a fully raised position.

We claim: 
     
         1 . An adjustable stand up desk comprising:
 (a) a first desk surface;   (b) a second desk surface connected to the first desk surface;   (c) a base, configured to sit on an existing desk, comprising at least two channels and a pair of positioning legs; and   (d) a folding leg assembly connecting the base to at least the first desk surface, the folding leg assembly including:
 (i) a first pair of legs that extends between the first desk surface and the base; and 
 (ii) a second pair of legs that extends between the first desk surface and the base, 
   wherein each leg of the first and second pairs of legs is configured to slide within the at least two channels of the base, such that the adjustable stand up desk can be selectively adjusted between at least a closed position to a fully raised position.   
     
     
         2 . The adjustable stand up desk according to  claim 1 , wherein the adjustable stand up desk can be adjusted to a partially raised position. 
     
     
         3 . The adjustable stand up desk according to  claim 2 , wherein the first desk surface extends (i) a distance H 1  from the base when the desk is in the fully extended position, (ii) a distance H 2  from the base when the desk is in the partially extended position, and (iii) a distance H 3  from the base when the desk is in the closed position, wherein the distance H 1  is greater than each of the distances H 2  and H 3 . 
     
     
         4 . The adjustable stand up desk according to  claim 1 , wherein each leg of the first and second pairs of legs is attached to at least one leg bar, each leg bar including a pair of wheels that is configured to move within the at least two channels of the base. 
     
     
         5 . The adjustable stand up desk according to  claim 1 , further comprising a frame system attached to the first desk surface, the frame system comprising at least two channels, wherein each leg of the first and second pairs of legs is configured to move within the at least two channels of the frame system. 
     
     
         6 . The adjustable stand up desk according to  claim 5 , wherein each leg of the first and second pairs of legs is attached to at least one leg bar, each leg bar including a pair of wheels that is configured to move within one of (i) the at least two channels of the base and (ii) the at least two channels of the frame system. 
     
     
         7 . The adjustable stand up desk according to  claim 1 , further comprising a gas spring assembly and an operable handle and a handle assembly configured to provide a controlled adjustment of the desk from at least the closed position to the fully extended position. 
     
     
         8 . The adjustable stand up desk according to  claim 8 , wherein the gas spring assembly comprises a spring mechanism, a gas cylinder, and a push rod that connects to both the spring mechanism and the gas cylinder. 
     
     
         9 . The adjustable stand up desk according to  claim 7 , wherein the handle assembly comprises:
 (a) a rotatable rod connected to the operable handle;   (b) a hinging member connected to the rotatable rod; and   (c) a biasing member that engages with the hinging member, such that rotation of the rotatable rod during operation of the operable handle results in (i) the hinging member engaging with the biasing member, and (ii) the biasing member interacting with the gas spring assembly to control adjustment of the desk from at least the closed position to the fully extended position.   
     
     
         10 . The adjustable stand up desk according to  claim 1 , further comprising a locking mechanism for locking the desk into the closed position. 
     
     
         11 . The adjustable stand up desk according to  claim 10 , wherein the locking mechanism comprises a locking member and a bracket with an opening, wherein the locking member engages with the opening of the bracket and said base to lock the desk into the closed position. 
     
     
         12 . The adjustable stand up desk according to  claim 1 , wherein the second desk surface includes a pair of handles that assists a user in the adjusting of the desk from at least the closed position to the fully extended position. 
     
     
         13 . An adjustable stand up desk comprising:
 (a) a first desk surface;   (b) a second desk surface connected to the first desk surface;   (c) a base, configured to sit on an existing desk, comprising at least two channels and a pair of positioning legs;   (d) a folding leg assembly connecting the base to at least the first desk surface, the folding leg assembly including:
 (i) a first pair of legs that extends between the first desk surface and the base; and 
 (ii) a second pair of legs that extends between the first desk surface and the base, wherein each leg of the first and second pairs of legs is configured to move within the at least two channels of the base, such that the adjustable stand up desk can be adjusted from at least a closed position to a fully extended position; 
   (e) a gas spring assembly that is configured to provide a controlled adjustment of the desk from at least the closed position to the fully extended position; and   (f) an operable handle and a handle assembly that are configured to engage with the gas spring assembly to assist in the adjusting of the desk from at least the closed position to the fully extended position.   
     
     
         14 . The adjustable stand up desk according to  claim 13 , wherein the gas spring assembly comprises a spring mechanism, a gas cylinder, and a push rod that connects to both the spring mechanism and the gas cylinder. 
     
     
         15 . The adjustable stand up desk according to  claim 13 , wherein the handle assembly comprises:
 (a) a rotatable rod connected to the operable handle;   (b) a hinging member connected to the rotatable rod; and   (c) a biasing member that engages with the hinging member, such that rotation of the rotatable rod during operation of the operable handle results in (i) the hinging member engaging with the biasing member, and (ii) the biasing member interacting with the gas spring assembly to control adjustment of the desk from at least the closed position to the fully extended position.   
     
     
         16 . The adjustable stand up desk according to  claim 15 , further comprising a locking mechanism for locking the desk into the closed position. 
     
     
         17 . The adjustable stand up desk according to  claim 16 , wherein the locking mechanism comprising a locking member and a bracket with an opening, wherein the locking member engages with the opening of the bracket to lock the desk into the closed position. 
     
     
         18 . The adjustable stand up desk according to  claim 15 , wherein the adjustable stand up desk can be adjusted to a partially extended position. 
     
     
         19 . An adjustable stand up desk comprising:
 (a) a upper desk platform;   (b) a second desk platform connected to the first desk platform;   (c) a base, configured to sit on an existing surface, comprising at least two opposing channels;   (d) a frame assembly secured to the lower surface of said upper desk platform, comprising at least two opposing channels;   (d) a folding leg assembly connecting the base to said frame assembly, the folding leg assembly including:
 (i) a first pair of legs that extends between the frame assembly and the base; and 
 (ii) a second pair of legs that extends between the frame assembly and the base, wherein each leg of the first and second pairs of legs is configured to move within the at least two channels of the base and the at least two opposing channels of said frame assembly, such that the adjustable stand up desk can be adjusted from at least a closed position to a fully extended position; 
   (e) a lockable gas spring assembly connected between said first and second pair of legs to provide a controlled adjustment of the desk from at least the closed position to the fully extended position;   (f) an operable handle and a handle assembly engaged with the gas spring assembly to selectively control separation between said first and second pair of legs to control the position of said upper platform relative to said base; and,   (g) a plurality of stabilizing struts pivotally connected to said frame assembly or said base and at least one of said first and second pair of legs.