Pushing stick and ring for same

Abstract

A pushing stick and a ring for the same. The lower end of a shaft comprises a stick ring comprising a fastening part and a projection-like ring frame attached to the fastening part. The bar-like ring frame is directed forwards with respect to the direction of travel and its front is provided with at least one spike. Said spike then resides at a distance from the central axis of the shaft, whereby a bending moment is directed to the ring frame on account of the push force. The ring frame is rigid in order to be able to transmit the bending moment being formed to the lower end of the shaft.

What is claimed is:  
     
         1 . A pushing stick, comprising 
 an elongated shaft,    a handle part arranged at the upper end of the shaft in order to direct a push force substantially in the longitudinal direction of the shaft to the stick,    a stick ring arranged at the lower end of the shaft, and wherein the stick ring comprises a fastening part for fastening the shaft to the stick ring,    a ring frame attached to said fastening part transversely to the longitudinal axis of the shaft, and as viewed in the longitudinal direction of the stick, the ring frame is a bar-like projection pointing in the direction of travel, and the first end of the ring frame is attached to the fastening part and the second end of the ring frame is free, and    at least one spike arranged on the side of the lower surface of the ring frame, and being arranged at least in the area of the second end of the ring frame at a distance from the central axis of the shaft,    the ring frame is arranged to serve as a lever arm between said spike and the shaft, whereby a bending moment is arranged to be formed in the ring frame when the push force in the direction of the longitudinal axis of the shaft is directed to the stick, and    the ring frame is a substantially rigid object in terms of bending, thus arranged to transmit the bending moment being formed to the lower end of the shaft.    
     
     
         2 . A pushing stick as claimed in  claim 1 , wherein 
 the second end of the ring frame extends farther than the first end of the ring frame, as viewed in the longitudinal direction of the stick.    
     
     
         3 . A pushing stick as claimed in  claim 1 , wherein 
 the lower surface of the ring frame is downwardly convex, as viewed in the direction of travel.    
     
     
         4 . A pushing stick as claimed in  claim 1 , wherein 
 the fastening part is an elongated sleeve,    the lower end of the shaft is arranged inside the sleeve, and    the sleeve is flexible in its longitudinal direction.    
     
     
         5 . A pushing stick as claimed in  claim 1 , wherein 
 the shape of the ring frame is substantially a triangle as viewed from the side, and    the shape of the bottom part of the cross-section of the ring frame is substantially a triangle and further, the upper part of the cross-section resembles a rectangle arranged in an upright position.    
     
     
         6 . A pushing stick as claimed in  claim 1 , wherein 
 one or more spikes are arranged in the area of the second end of the ring frame exclusively.    
     
     
         7 . A pushing stick as claimed in  claim 1 , wherein 
 the lower end of the stick comprises a substantially plate-like extension part arranged on the side of the lower surface of the ring frame,    the extension part is larger than the lower surface of the ring frame,    the front of the extension part comprises a hinge,    the extension part is attached to the second end of the ring frame by means of said hinge, and    the extension part is arranged to turn with respect to said hinge a predetermined angle downwards from the lower surface of the ring frame.    
     
     
         8 . A pushing stick as claimed in  claim 7 , wherein 
 the front of the extension part comprises two upwards-pointing lugs at a distance from each other,    said lugs comprise transverse first openings,    the area of the second end of the ring frame comprises a transverse second opening, and    a hinge pin is arranged through said first openings and said second opening to pivotally connect the ring frame and the extension part with one another.    
     
     
         9 . A pushing stick as claimed in  claim 7 , wherein 
 the extension part comprises at least one opening through which the spike is arranged to extend to the side of the lower surface of the extension part.    
     
     
         10 . A ring for a pushing stick, the stick ring comprising 
 a fastening part for fastening the stick ring to the lower end of a shaft of the pushing stick,    a ring frame attached to said fastening part and as viewed from above, the ring frame is a bar-like projection pointing in the direction of travel, and the first end of the ring frame is attached to the fastening part and the second end of the ring frame is free,    at least one spike provided on the side of the lower surface of the ring frame, and being arranged at least in the area of the second end of the ring frame at a distance from the fastening part,    the ring frame is arranged to form a lever arm between said spike and the fastening part, and    the ring frame is a substantially rigid object in terms of bending.    
     
     
         11 . A stick ring as claimed in  claim 10 , wherein 
 the second end of the ring frame extends farther than the first end of the ring frame as viewed in the longitudinal direction of the fastening part,    the spike in the area of the second end thus constituting the lowest section of the stick ring.    
     
     
         12 . A stick ring as claimed in  claim 10 , wherein 
 the fastening part is an elongated sleeve, and    the sleeve is flexible in its longitudinal direction.    
     
     
         13 . A stick ring as claimed in  claim 10 , wherein 
 the shape of the ring frame is substantially a triangle as viewed from the side, and    the shape of the bottom part of the cross-section of the ring frame is substantially a triangle and further, the upper part of the cross-section resembles a rectangle arranged in an upright position.    
     
     
         14 . A stick ring as claimed in  claim 10 , wherein 
 at least one spike is arranged in the area of the second end of the ring frame exclusively.    
     
     
         15 . A stick ring as claimed in  claim 14 , wherein 
 the second end of the ring frame comprises a projection-like claw pointing downwards from its lower surface, and    the spike in the stick ring is arranged at the lower end of the claw.    
     
     
         16 . A stick ring as claimed in  claim 10 , wherein 
 a substantially plate-like extension part is arranged on the side of the lower surface of the ring frame,    the extension part is larger than the lower surface of the ring frame,    the front of the extension part comprises a hinge,    the extension part is attached to the second end of the ring frame by means of said hinge, and    the extension part is arranged to turn with respect to said hinge a predetermined angle downwards from the lower surface of the ring frame.    
     
     
         17 . A stick ring as claimed in  claim 16 , wherein the front of the extension part comprises two upwards-pointing lugs at a distance from each other, 
 said lugs comprise transverse first openings,    the area of the second end of the ring frame comprises a transverse second opening, and    a hinge pin is arranged through said first openings and said second opening to pivotally connect the ring frame and the extension part with one another.