US2001054334A1PendingUtilityA1

Spanner with prevention of disengagement of fasteners

42
Priority: Jun 22, 2000Filed: Mar 28, 2001Published: Dec 27, 2001
Est. expiryJun 22, 2020(expired)· nominal 20-yr term from priority
Inventors:David LingHsien-Chung Tuan-Mu
B23P 15/00B25B 13/04B21J 5/12B21K 1/30B25B 13/065B21K 21/08B21K 5/00B25B 23/0071
42
PatentIndex Score
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Claims

Abstract

A spanner comprises a box end that has an inner periphery consisting of a number of wall faces to define a first polygonal receiving space. Each wall face includes a groove defined therein. The grooves of the wall faces together define a second polygonal receiving space. At least one of the grooves includes a closed first end and an open second end.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A spanner comprising a box end having an inner periphery consisting of a plurality of wall faces to define a first polygonal receiving space, each said wall face including a groove defined therein, the grooves of the wall faces together defining a second polygonal receiving space, at least one of the grooves including a closed first end and an open second end.  
     
     
         2 . The spanner as claimed in    claim 1   , wherein each said groove includes a closed first end and an open second end.  
     
     
         3 . The spanner as claimed in    claim 1   , wherein each said groove is triangular.  
     
     
         4 . The spanner as claimed in    claim 1   , wherein the first polygonal receiving space and the second polygonal space are triangular.  
     
     
         5 . The spanner as claimed in    claim 4   , wherein the first polygonal receiving space has an angular positional difference of 60° from the second polygonal receiving space.  
     
     
         6 . The spanner as claimed in    claim 1   , wherein the first polygonal receiving space and the second polygonal space are square.  
     
     
         7 . The spanner as claimed in    claim 6   , wherein the first polygonal receiving space has an angular positional difference of 45° from the second polygonal receiving space.  
     
     
         8 . The spanner as claimed in    claim 1   , wherein the first polygonal receiving space and the second polygonal space are hexagonal.  
     
     
         9 . The spanner as claimed in    claim 8   , wherein the first polygonal receiving space has an angular positional difference of 30° from the second polygonal receiving space.  
     
     
         10 . The spanner as claimed in    claim 1   , wherein the first polygonal receiving space and the second polygonal space are octagonal.  
     
     
         11 . The spanner as claimed in    claim 10   , wherein the first polygonal receiving space has an angular positional difference of 22.5° from the second polygonal receiving space.  
     
     
         12 . A spanner having a box end and a drive member rotatably mounted in the box end, the drive member comprising an inner periphery consisting of a plurality of wall faces to define a first polygonal receiving space, each said wall face including a groove defined therein, the grooves of the wall faces together defining a second polygonal receiving space, at least one of the grooves including a closed first end and an open second end.  
     
     
         13 . The spanner as claimed in    claim 12   , wherein each said groove includes a closed first end and an open second end.  
     
     
         14 . The spanner as claimed in    claim 12   , wherein each said groove is triangular.  
     
     
         15 . The spanner as claimed in    claim 12   , wherein the first polygonal receiving space and the second polygonal space are triangular.  
     
     
         16 . The spanner as claimed in    claim 15   , wherein the first polygonal receiving space has an angular positional difference of 60° from the second polygonal receiving space.  
     
     
         17 . The spanner as claimed in    claim 12   , wherein the first polygonal receiving space and the second polygonal space are square.  
     
     
         18 . The spanner as claimed in    claim 17   , wherein the first polygonal receiving space has an angular positional difference of 45° from the second polygonal receiving space.  
     
     
         19 . The spanner as claimed in    claim 12   , wherein the first polygonal receiving space and the second polygonal space are hexagonal.  
     
     
         20 . The spanner as claimed in    claim 19   , wherein the first polygonal receiving space has an angular positional difference of 30° from the second polygonal receiving space.  
     
     
         21 . The spanner as claimed in    claim 12   , wherein the first polygonal receiving space and the second polygonal space are octagonal.  
     
     
         22 . The spanner as claimed in    claim 21   , wherein the first polygonal receiving space has an angular positional difference of 22.5° from the second polygonal receiving space.

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