US2008018159A1PendingUtilityA1

Height adjustable headrest device

34
Assignee: GRUNOW ALEXANDERPriority: Jun 1, 2006Filed: May 31, 2007Published: Jan 24, 2008
Est. expiryJun 1, 2026(expired)· nominal 20-yr term from priority
Inventors:Alexander GrunowDavid Hruza
A61G 5/121A47C 7/38A61G 5/12
34
PatentIndex Score
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Cited by
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References
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Claims

Abstract

The invention relates to a height adjustable headrest device with a crossbar element and a headrest supporting element as well as a clamp connection for continuously variable mounting of the headrest element at the crossbar element. The clamp connection comprises a retaining clamp comprising two recesses as well as a tapped bore and gripping around a crossbar element, a centering bushing comprising an external thread and an internal thread, the centering bushing being screwed into the tapped bore of the retaining clamp, as well as a screw element screwed in the centering bushing. The headrest supporting element is inserted in the recesses of the retaining clamp. The crossbar element comprises a bore in which the centering bushing is inserted. The clamp connection is caused by screwing the screw element into the centering bushing and thus bringing the headrest supporting element near the crossbar element.

Claims

exact text as granted — not AI-modified
1 . A height adjustable headrest device with a crossbar element and a headrest supporting element as well as a clamp connection for continuously variable mounting of the headrest supporting element at the crossbar element, wherein the clamp connection comprises: 
 a retaining clamp comprising two recesses as well as a tapped bore, the retaining clamp gripping around the crossbar element,    a centering bushing comprising an external thread and an internal thread, wherein the centering bushing is screwed in the tapped bore of the retaining clamp, and    a screw element screwed in the centering bushing,    wherein the headrest supporting element is inserted in the recesses of the retaining clamp, the crossbar element comprises a bore in which the centering bushing is inserted, and the clamp connection is caused by screwing in the screw element into the centering bushing and thus bringing the headrest supporting element near the crossbar element.    
   
   
       2 . The device according to  claim 1 , wherein the sense of rotation of the internal thread is opposed to that of the external thread.  
   
   
       3 . The device according to  claim 2 , wherein the centering bushing comprises a groove which is designed for setting a screwdriver.  
   
   
       4 . The device according to  claim 2 , wherein the centering bushing comprises a collar which provides a stop when it is screwed in.  
   
   
       5 . The device according to  claim 4 , wherein the centering bushing comprises a groove which is designed for setting a screwdriver.  
   
   
       6 . The device according to  claim 1 , wherein the centering bushing comprises a collar which provides a stop when it is screwed in.  
   
   
       7 . The device according to  claim 6 , wherein the centering bushing comprises a groove which is designed for setting a screwdriver.  
   
   
       8 . The device according to  claim 1 , wherein the centering bushing comprises a groove which is designed for setting a screwdriver.  
   
   
       9 . The device according to  claim 1 , wherein a spacer is arranged between the headrest supporting element and the crossbar element.  
   
   
       10 . The device according to  claim 9 , wherein the spacer is made from a plastic.  
   
   
       11 . The device according to  claim 9 , wherein the spacer is guided via a groove and tongue connection in the retaining clamp.  
   
   
       12 . The device according to  claim 11 , wherein the spacer is made from a plastic.  
   
   
       13 . The device according to  claim 1 , wherein the crossbar element has a tubular design.  
   
   
       14 . The device according to  claim 13 , wherein a bulging which is concave to the inside which serves as an abutment for the screw element is provided in the tubular crossbar element opposite the bore for receiving the centering bushing.  
   
   
       15 . The device according to  claim 1 , wherein the headrest supporting element and the recesses of the retaining clamp have a rectangular design.  
   
   
       16 . Wheel chair with a height adjustable headrest device according to  claim 1 , wherein the crossbar element is adapted to be a push handle.

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