Patent Publication Number: US-2011052313-A1

Title: Biaxial joint

Description:
TECHNICAL FIELD 
     The invention concerns biaxial joint for leg support used on birth beds and gynaecological examination chair. 
     BACKGROUND ART 
     To set the required position for leg support used on birth beds or gynaecological examination chairs, either ball joints or various arresting devices are used. The disadvantage of the ball joint is its insufficient load-bearing capacity, while the arresting devices are characterised by their incompact shape, time-consuming setting process, and by their mostly difficult cleaning. 
     DISCLOSURE OF THE INVENTION 
     The above indicated shortcomings are resolved to a large extent by the biaxial joint according to this invention, the essence of which consists of the following: the body of the joint is pivotally seated on the central pin, onto which is also fixed the wheel with a screw and internal toothing, while in the body of the joint is in the guide installed a sliding block, into which is fitted the arresting pin, and onto the body of the joint is pivotally installed the collar of the joint, pressed by a lever with eccentric over the casing, disc springs and radial toothing to the body of the joint, and it is connected by the central screw to the sliding block, between which and the body of the joint is inserted an internal expanding spring, while between the body of the joint and the collar of the joint is inserted the external expanding spring, and the body of the joint is covered with capping. 
     The advantage of the biaxial joint according to this invention rests in its capacity to allow very fast setting of leg support used on birth beds or gynaecological examination chairs for the given size of a patient. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
       The attached drawing schematically illustrates the biaxial joint according to this invention. 
     
    
    
     MODE FOR CARRYING OUT THE INVENTION 
     An example of execution of biaxial joint made according to this invention is apparent from the attached example. On the central pin  1  is pivotally seated the body of the joint  2  and the wheel  3  with a screw  4  and internal toothing  5 . In the body of the joint  2  is in the guide  8  movably seated the sliding block Jx into which is inserted the arresting pin  6 . Onto the body of the joint  2  is pivotally fitted the collar of the joint  9 , which is pressed by a lever  10  with eccentric H over the casing  12 , disc springs  13  and radial toothing  14  to the body of the joint  2 . The collar of the joint  9  is connected with the central screw  15  to the sliding block  7 , between which and the body of the joint  2  is inserted the internal expanding spring  16 . Between the body of the joint  2  and the collar of the joint  9  is inserted the external expanding spring  17 . The body of the joint  2  is covered with capping  18 . On the central pin  1  is fitted a control lever  19 . 
     INDUSTRIAL APPLICABILITY 
     The biaxial joint according to this invention can be utilised advantageously for leg support used on birth beds and on gynaecological examination chairs and for other health services equipment.