Height-adjustable sewing table

Abstract

A height-adjustable sewing table, having a flat tabletop providing a work surface for piece goods and craft items being sewn. The tabletop is supported by a pair of height-adjustable leg assemblies, having a base, a tubular column and an extendible member with one ends which registers with the tubular column. The other end of the extendible member engages and articulates with the undersurface of the tabletop. An opening is provided in the tabletop, into which a sewing machine mounted on a platform is raised from or lowered into a position from below the tabletop by a lifting mechanism. The lifting mechanism preferably has mast mounted vertically and a carriage which rides vertically along the mast. The platform is mounted on the carriage. The carriage may be moved manually or with pneumatic or electrical power assistance. Likewise, the extendible members of the leg assemblies may be extended manually or with pneumatic or electrical power assistance.

1 ) A height-adjustable sewing table, comprising: 
 a) a tabletop, having a flat upper surface, an undersurface, two side edges, a front edge and a rear edge and a thickness, wherein an opening is defined in said tabletop extending through its thickness;    b) a pair of support legs, each of said support legs comprising a base, a column defining an interior channel, and an extendible member with a first end section communicating with said channel and a second end section communicating with said underside of said tabletop, wherein said extendible members of both support legs are capable of simultaneous linear extension from said respective channels;    c) a sewing machine support platform, having an upper surface, an underside and a rectangular shape congruent with said rectangular opening defined in said tabletop;    d) a lifting means to position said sewing machine support platform between proximity to said undersurface and into registration with said opening.    
   
   
       2 ) The height-adjustable sewing table of  claim 1 , further comprising a sewing machine disposed on said upper surface of said sewing machine support platform.  
   
   
       3 ) The height-adjustable sewing table of  claim 1 , wherein said extendible member may be secured at incremental extensions from said base.  
   
   
       4 ) The height-adjustable sewing table of  claim 1 , wherein said support legs further comprise one or more gear elements for extending said extendible member.  
   
   
       5 ) The height-adjustable sewing table of  claim 4 , further comprising a controllable electric motor in communication with said gear elements.  
   
   
       6 ) The height-adjustable sewing table of  claim 1 , wherein said support legs each further comprise a pneumatic spring in communication with said extendible member and said base for assisting in extension of said extendible member from said channel.  
   
   
       7 ) The height-adjustable sewing table of  claim 1 , wherein said lifting means comprises a carriage upon which is disposed said sewing machine platform and a mast on which said carriage is disposed, and means for translating said carriage relative to said mast.  
   
   
       8 ) The height-adjustable sewing table of  claim 7 , wherein said means for translating said carriage comprises an electric motor.  
   
   
       9 ) The height-adjustable sewing table of  claim 7 , wherein said means for translating said carriage comprises a screw rotationally disposed on said mast and a threaded follower connected to said carriage and engaging said screw.  
   
   
       10 ) A height-adjustable sewing table, comprising: 
 a) a tabletop, having a flat upper surface, an undersurface, two side edges, a front edge and a rear edge and a thickness, wherein an opening is defined in said tabletop extending through its thickness;    b) a pair of support legs, each of said support legs comprising a base, a tubular column defining an interior channel, and an extendible member with a first end section communicating with said channel and a second end section communicating with said underside of said tabletop, wherein said extendible members of both support legs are capable of simultaneous linear extension from said respective channels, wherein said second end sections of said extendible members articulate with said undersurface of said tabletop;    c) a sewing machine support platform, having an upper surface suitable for mounting a sewing machine, an underside and a shape congruent with said rectangular opening defined in said tabletop;    d) a lifting means to translate said sewing machine support platform between proximity to said undersurface and into registration with said opening.    
   
   
       11 ) The height-adjustable sewing table of  claim 10 , wherein said articulation of said second ends of said extendible members with said underside of said tabletop is about an axis collinear with said second ends.  
   
   
       12 ) The height-adjustable sewing table of  claim 10 , wherein said range of articulation of said second ends of said extendible members with said undersurface of said tabletop is between  0  and at least 10 degrees of an angle of said tabletop orthogonal with said extendible member.  
   
   
       13 ) The height-adjustable sewing table of  claim 10 , wherein said range of articulation is between 0 and 5 degrees of an angle of said tabletop orthogonal with said extendible member.  
   
   
       14 ) The height-adjustable sewing table of  claim 10 , wherein said extendible member may be secured at incremental extensions from said base.  
   
   
       15 ) The height-adjustable sewing table of  claim 10 , wherein said support legs further comprise one or more gear elements for extending said extendible member.  
   
   
       16 ) The height-adjustable sewing table of  claim 14 , further comprising a controllable electric motor in communication with said gear elements.  
   
   
       17 ) The height-adjustable sewing table of  claim 10 , wherein said support legs each further comprise a pneumatic cylinder in communication with said extendible member for assisting in extension of said extendible member from said channel.