WO2003033197A1 - Hacksaw with high tension saw blade - Google Patents

Hacksaw with high tension saw blade Download PDF

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Publication number
WO2003033197A1
WO2003033197A1 PCT/ZA2002/000157 ZA0200157W WO03033197A1 WO 2003033197 A1 WO2003033197 A1 WO 2003033197A1 ZA 0200157 W ZA0200157 W ZA 0200157W WO 03033197 A1 WO03033197 A1 WO 03033197A1
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WO
WIPO (PCT)
Prior art keywords
tension
socket
blade
guide
angle
Prior art date
Application number
PCT/ZA2002/000157
Other languages
French (fr)
Inventor
Frans Petrus Jacobus Jacobs
Original Assignee
Frans Petrus Jacobus Jacobs
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frans Petrus Jacobus Jacobs filed Critical Frans Petrus Jacobus Jacobs
Publication of WO2003033197A1 publication Critical patent/WO2003033197A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
    • B23D49/12—Hacksaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
    • B23D51/12—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools for use with tools, dealt with in this subclass, which are connected to a carrier at both ends, e.g. bows adjustable in length or height
    • B23D51/125—Blade tensioning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
    • B23D51/12—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools for use with tools, dealt with in this subclass, which are connected to a carrier at both ends, e.g. bows adjustable in length or height
    • B23D51/14—Attachment of the tool

Definitions

  • the invention lies in the field of hand-tools, particularly a range of hacksaws that cover a wide field of uses for general - and specialized purposes.
  • the hacksaw - as verified by title- is generally known to he an unrefined hand-tool that is used for crude cutting of metal.
  • the fundamental characteristic of the invention thus constitutes an adaptable key-structure that provides great versatility, - on which structure a large range of high-tension hacksaws have been developed.
  • the built-in sockets serve as guide-sockets for : ( a ) the tension-adjustment bolt ( PIG. 1. ( a ) ( b ) the blade-setting bolt ( PIG. 1. ( b )
  • the sockets and bolts are preferably square-shaped, for better guidance of linear movement, greater stability, as well as constituting the blade-locking-mechanism.
  • the alternative socket-angles in the opposite direction, from 136°- to 1 ⁇ 0°- are being utilized for blade-setting mechanisms - including further development.
  • the angle-tension mechanism producing a very effective mechanical advantage is a technical achievement that has never before been implemented to advantageous effect on hacksaws.
  • the technical gain indicates a strong similarity with the mechanical advantage of levers, by the following comparison : A.
  • B. The tension bolt ( fig 1 ) - no.5 - implemented as lever however in a peculiar linear movement, instead of the conventional leverage-motion.
  • the tension knob pulls the tension bolt upward, at an obtuse angle through the guide-socket -no. 6 toward high tension, with very great ease.
  • PRAME JOINT-CASTING WITH HANDLE - IN ALUMINIUM.
  • HANDLE JOINT-CASTING WITH PRAME 3. EXTERIOR HOLLOW SURPACE ON BOTH SIDES. 4. 300 mm CONVENTIONAL SAWBLADE. 5. TENSION BOLT. 6. BUILT-IN SOCKET POR TENSION BOLT - 120° - ANGLE. 7. TENSION ADJUSTMENT KNOB. 8. BLADE-SETTING BOLT , c 9. BUILT-IN GUIDE-SOCKET POR POR BLADE-SETTING BOLT. (180 10. BLADE-SETTING NUT - OR KNOB.
  • PRAISE HEAVIER CASTING - WITH HANDLE
  • HANDLE JOINT-CASTING WITH PRAME 13.
  • EXTERIOR HOLLOW SURPACE 14. 300 mm BLADE.
  • TENSION BOLT 16. BUILT-IN GUIDE SOCKET POR TENSION BOLT - ( 120° ANGLE
  • PRAMS HEAVY-DUTY ALUMINIUM PRAME
  • HANDLE HEAVY - DUTY (SPECIALIZED DESIGN POR SAPETY )
  • FRAME JOINT-ALUMINIUM CASTING WITH HANDLE 143. HORIZONTALLY IN STRAIGHT LINE WITH FRAME 144. EXTERIOR HOLLOW SURFACES 145. 150 mm SAWBLADE WITH PINS AT BOTH ENDS ( CONVENTIONAL 146 ⁇ TENSION BOLT - OF DIFFERENT CONFIGURATION,
  • FRAME JOINT ALUMINIUM CASTING WITH HANDLE 183. HANDLE IN LINE WITH FRAME 184. EXTERIOR HOLLOW SURFACES 185. 150 mm SAWBLADE 186. TENSIO -BOLT ( CURVED CONFIGURATION )
  • TENSION BOLT 238 GUIDE-SOCKET ( 120° - ANGLE ) 239. TENSION KNOB.
  • FRAME CASTING IN ALUMINIUM 241.
  • HANDLE ANY OP THE 2 SLANTED SECTIONS OP THE FRAME
  • TENSION BOLT 248 GUIDE-SOCKET ( 125°- * ANGLE )

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

Built-in sockets in the hacksaw-frame and handle at alternative angles in relation to the blade, constitute the fundamental key-structure of the invention. The resultant achievements in development, now cover the entire region of angles from 90° to 180° in relation with the blade. The socket - Fig. 1 -no. 6 serves as guide-socket for the tension bolt no. 5. The socket - no. 9 serves as guide-socket for the blade-setting bolt - no. 8. It should be noted that the nearer the socket-angle 6 of the tension bolt 5 to 90° - the greater the ease of applying tension to the blade - as opposed to the opposite direction towards 180°. The alternative socket-angles from 90° to 135° have therefore been implimented for tension-mechanism - fig. 1 - (5 and 6). Alternative angles from 136° to 180° have been utilized for blade-setting mechanisms.

Description

HACKSAW WITH HIGH TENSION SAW BLADE
Technical Field
The invention lies in the field of hand-tools, particularly a range of hacksaws that cover a wide field of uses for general - and specialized purposes. The hacksaw - as verified by title- is generally known to he an unrefined hand-tool that is used for crude cutting of metal.
Background Art
Comprising a "blade set in a frame, the hacksaw has survived almost unchanged for generations, as an indispensable tool, yet regardless of characteristic primitive features.
An essential requirement for a hacksaw to' he used effectively, is a proper tension-mechanism, the proven fact heing that tension provides "better quality of use and longer lasting of bladeso Tension on a conventional hacksaw is achieved only
"by exertion of great force on a nut screwed to a tension holt that is in straight line with the blade, indicating total absence of mechanical advantage, in a primitive mechanism. Other mechanisms for tensioning blades have been introduced, but close examination indicated that improvements were insignificant.
Examples of such mechanisms are US patents57β8788 6079109 and 6134791.
There are introductions of hacksaws with specialized frames, however without claims of high-tension capabilities.
Examples are South African design patent A98/071 and patent 96/7425. Disclosure
Having built numerous prototype-hacksaws to determine the effectiveness of' specific angles in experimental tension-mechanisms - in different combinations varying from 90°- angles to 180 - angles in relation to the sawblade, the claims of the invention on the resultant achievements now cover the entire region of angle-tension mechanisms as stated above.
The fundamental characteristic of the invention thus constitutes an adaptable key-structure that provides great versatility, - on which structure a large range of high-tension hacksaws have been developed.
Built-in sockets in the hacksaw-frame and handle at alternative angles, constitute the key-structure. The built-in sockets serve as guide-sockets for : ( a ) the tension-adjustment bolt ( PIG. 1. ( a ) ( b ) the blade-setting bolt ( PIG. 1. ( b ) The sockets and bolts are preferably square-shaped, for better guidance of linear movement, greater stability, as well as constituting the blade-locking-mechanism.
Guide-sockets in curved configuration, with matching bolts have also been incorporated, that provides further proof of great versatility, as illustrated in PIG. 17 and PIG. 26. Development of the invention has delivered practical proof that the nearer the socket-angle of the tension-mechanism to the right angle of 90° in relation to the sawblade, the greater the ease of applying tension, as opposed to the opposite direction towards the 180 - straight angle. The alternative tension socket-angles from 90° - to 135 - have therefore been incorporated in the development of a large range of high-tension - and extra high-tension hacksaws that cover a very wide field of allround practical use. The alternative socket-angles in the opposite direction, from 136°- to 1δ0°- are being utilized for blade-setting mechanisms - including further development. The angle-tension mechanism producing a very effective mechanical advantage, is a technical achievement that has never before been implemented to advantageous effect on hacksaws. The technical gain indicates a strong similarity with the mechanical advantage of levers, by the following comparison : A. The tension guide-socket ( fig 1 ) - no.6 - being the fixed support ( fulcrum ) B. : The tension bolt ( fig 1 ) - no.5 - implemented as lever however in a peculiar linear movement, instead of the conventional leverage-motion.
C. : The blade ( fig 1 ) - no. - hooked to a pin on the lower end of the tension bolt - constitutes the resisting force, the opposite-end of the said blade being firmly anchored to the blade-setting bolt (fig 1 ) no.8.
D. : The threaded opposite-end of the tension bolt - no. 5 is fitted with a tension-knob ( fig i ) - no . 7 that provides the applying force.
The tension knob pulls the tension bolt upward, at an obtuse angle through the guide-socket -no. 6 toward high tension, with very great ease. RANGE OP HACKSAWS,NUMBERED PARTS AND BRIEP DESCRIPTION IG 1. GENERAL PURPOSE HIGH-TENSION HACKSAW
1. PRAME : JOINT-CASTING WITH HANDLE - IN ALUMINIUM.
2. HANDLE: JOINT-CASTING WITH PRAME 3. EXTERIOR HOLLOW SURPACE ON BOTH SIDES. 4. 300 mm CONVENTIONAL SAWBLADE. 5. TENSION BOLT. 6. BUILT-IN SOCKET POR TENSION BOLT - 120° - ANGLE. 7. TENSION ADJUSTMENT KNOB. 8. BLADE-SETTING BOLT , c 9. BUILT-IN GUIDE-SOCKET POR POR BLADE-SETTING BOLT. (180 10. BLADE-SETTING NUT - OR KNOB.
2. ARTISANS HIGH-TENSION HACKSAW.
11. PRAISE : HEAVIER CASTING - WITH HANDLE
12. HANDLE : JOINT-CASTING WITH PRAME 13. EXTERIOR HOLLOW SURPACE 14. 300 mm BLADE. 15. TENSION BOLT 16. BUILT-IN GUIDE SOCKET POR TENSION BOLT - ( 120° ANGLE
17. TENSION-KNOB. 18. BLADE-SETTING 'BOLT
19. BUILT-IN GUIDE-SOCKET POR BLADE-SETTING BOLT (180°) 20. BLADE SETTING NUT.
3, INDUSTRIAL HIGH-TENSION HACKSAW
21. PRAME : STURDIER JOINT CASTING WITH HANDLE 22. HANDLE : JOINT-CASTING WITH PRAME. 23. EXTERIOR HOLLOW SURPACE 24. 300 mm SAWBLADE 25. TENSION BOLT. 26. BUILT-IN GUIDE-SOCKET POR TENSION BOLT ( 120°- ANGLE )
27. TENSION KNOB. 28. BLADE-SETTING ,BOLT , 29. BUILT-IN GUIDE-SOCKET POR BLADE-SETTING BOLT- ( 180° ) 30. BLADE-SETTING NUT.
4. DELUXE MODEL HIGH-TENSION HACKSAW
31. PRAME - HEAVIER ALUMINIUM CASTING 32. HANDLE : SPECIALIZED DESIGN POR SAPETΪ 33. EXTERIOR HOLLOW SURPACE
34. 300 mm BLADE 35. TENSION BOLT " n 6 BUILT-IN GUIDE-SOCKET POR TENSION BOLT ( 120 - ANGLE ) 37». TENSION KNOB
38. BLADE-SETTING BOLT n
39. BUILT-IN GUIDE-SOCKET POR . BLADE SETTING ( 180 -ANGLE
40. BLADE-SETTING NUT. 5. TWO-IN-ONE HIGH-TENSION HACKSAW
41. PRAME : JOINT ALUMINIUM CASTING WITH HANDLE 42. HANDLE: JOINT ALUMINIUM CASTING WITH PRAME 43. EXTERIOR HOLLOW SURFACES
44. 300 mm SAWBLADE
45. 300 mm SAWBLADE 46. TENSION BOLT
47. TENSION BOLT 48. BUILT-IN GUIDE-SOCKET ( 135° - ANGLE )
49. BUILT-IN GUIDE-SOCKET ( 135 - ANGLE ) 50. TENSION KNOB 51. TENSION KNOB
52. BLADE-SETTING BOLT 53. BLADE-SETTING BOLT 54. BUILT-IN GUIDE SOCKET( 180° - ANGLE ) 55. BUILT-IN GUIDE SOCKET( 180° - ANGLE ) 56. BLADE-SETTING KNOB 57. BLADE-SETTING KNOB 58. REMOVABLE SIDE-HANDLE ( CAN BE SECURED ON EITHER SIDE )
TWO-IN-ONE HEAVY DUTY HIGH-TENSION HACKSAW
6. 59. PRAMS : HEAVY-DUTY ALUMINIUM PRAME 60. HANDLE : HEAVY - DUTY (SPECIALIZED DESIGN POR SAPETY )
1. EXTERIOR HOLLOW SURFACES 62. 300 mm SAWBLADE 63. 300 mm SAWBLADE 64. TENSION BOLT 65. TENSION BOLT 66. BUILT-IN GUIDE-SOCKET 135 - ANGLE 61. BUILT-IN GUIDE-SOCKET 135c - ANGLE 68. TENSION KNOB 69. TENSION KNOB 70. BLADE-SETTING BOLT 71. BLADE-SETTING BOLT 72. BUILT-IN GUIDE-SOCKET 180°- ANGLE 73. BUILT-IN GUIDE-SOCKET 180°- ANGLE 74. BLADE-SETTING . NOB 75. BLADE-SETTING- KNOB 76. REMOVABLE SIDE-HANDLE ( CAN BE SECURED ON EITHER SIDE
PRECISION CUT HIGH-TENSION HACKSAW
77. LOW-CLEARANCE PRAME JOINT-CASTING WITH HANDLE 78. HANDLE IN HORIZONTAL STRAIGHT LINE WITH PRAME. 79. EXTERIOR HOLLOW SURFACES 80. 300 mm SAWBLADE 81. TENSION BOLT 82. BUILT-IN GUIDE SOCKET ( 127 - ANGLE ) 83. TENSION" ADJUSTMENT KNOB 84. BLADE-SETTING BOLT 85. BUILT-IN GUIDE-SOCKET ( 180° - ANGLE ) 86. BLADE-ADJUSTMENT NUT. 87. SAW-GUARD 88. ADJUSTABLE SAW-GUARD ARM 89. ADJUSTMENT SCREW - 89 (a) THREADED HOLE IN SAW-GUARD 90. THREADED HOLE IN FRAME, POR SAW-GUARD ADJUSTMENT 91. SCREW POR THREADED HOLE IN PRAME 8. SPECIALIZED BUTCHERS HIGH-TENSION HACKSAW
92. FRAME : ALUMINIUM JOINT-CASTING WITH HANDLE
93. HANDLE: JOINT-CASTING WITH PRAME
94. EXTERIOR HOLLOW SURFACES
95. BUTCHERS HACKSAW-BLADE
96. TENSION BOLT
97. BUILT-IN GUIDE-SOCKET ( 120° - ANGLE )
98. TENSION-KNOB
99. BLADE-SETTING BOLT 100. GUIDE-SOCKET ( 180° - ANGLE ) 101. BLADE-ADUSTMENT KNOB.
9. SPECIALIZED BUTCHERS HEAVY DUTY HIGH-TENSION HACKSAW
102. STURDY. ALUMINIUM FRAME 103 o SPECIALIZED HEAVY DUTY ALUMINIUM HANDLE 104. EXTERIOR HOLLOW SURFACES 105. BUTCHERS HACKSAW BLADE. 106. TENSION BOLT
107. BUILT-IN GUIDE-SOCKET ( 120° - ANGLE ) 108. TENSION KNOB
109. BLADE-SETTING BOLT- 110. GUIDE-SOCKET ( 180° - ANGLE ) 111. BLADE-ADJUSTMENT KNOB.
10. INDUSTRIAL HEAVY DUTY HIGH-TENSION HACKSAW
112. HEAVY DUTY ALUMINIUM FRAME 113. SPECIALIZED SAFETY HANDLE - ( SAME AS 103 ) 114. EXTERIOR HOLLOW SURFACES 115. INDUSTRIAL ±OWERSAW BLADE 116. TENSION BOLT 117. BUILT-IN GUIDE-SOCKET ( 110° - ANGLE ) 118. TENSION KNOB 119. BLADE-SETTING BOLT 120. BUILT-IN GUIDE-SOCKET ( 180°- ANGLE ) 121. BLADE-ADJUSTMENT KNOB.
11 MULTI-PURPOSE HIGH-TENSION HACKSAW ( 3 DIFFERENT SIZES
122. HIGH-ARCH FRAME IN ALUMINIUM 123. HANDLE : REAR SLANTED PART OF FRAME UTILIZED AS HANDLE. 124. EXTERIOR HOLLOW SURFACES 125. ALTERNATIVE SAWBLADES COVERING DIFFERENT FIELDS 126. TENSION BOLT. 127. BUILT-IN GUIDE-SOCKET ( 115 - ANGLE ) 128. TENSION KNOB 129. BLADE-SETTING BOLT 130. BUILT-IN GUIDE-SOCKET ( 180 - ANGLE ) 131. BLADE-ADJUSTMENT KNOB. FIG12. CONTINUOUS -CUTTING HACKSAW
132. FLAT, BROAD SPRINGSTEEL PRAME 133. HANDLE : ■ SPECIALIZED DESIGN - IN ALUMINIUM. 134. EXTERIOR HOLLOW SECTIONS ON HANDLE 135. POWERSAW-BLADE 136. TESION BOLT 137. BUILT-IN GUIDE-SOCKET ( 118° - ANGLE ) 138. TENSION KNOB 139. •BLADE-SETTING BOLT 140. BUILT-IN GUIDE SOCKET ( 180° - ANGLE ) 141 . BLADE-ADJUSTMENT KNOB
13. SMALL- HIGH-TENSION TECHNICIANS HACKSAW
142. FRAME: JOINT-ALUMINIUM CASTING WITH HANDLE 143. HORIZONTALLY IN STRAIGHT LINE WITH FRAME 144. EXTERIOR HOLLOW SURFACES 145. 150 mm SAWBLADE WITH PINS AT BOTH ENDS ( CONVENTIONAL 146β TENSION BOLT - OF DIFFERENT CONFIGURATION,
INCORPORATED TO SAWS WITH 150mm BLADES
147. BUILT-IN GUIDE SOCKET ( 128° - ANGLE ) 148. TENSION KNOB.
149. SLOTTED HOOK POR SECURING REAR-END OF BLADE
14. SMALL TWO-IN-ONE HIGH-TENSION HACKSAW
FRAME : JOINT-ALUMINIUM CASTING WITH HANDLE, HANDLE : HORIZONTALLY IN LINE WITH PRAME EXTERIOR HOLLOW SURFACES 150 mm SAWBLADE 1 0 mm SAWBLADE TENSION BOLT TENSION BOLT
BUILT-IN GUIDE-SOCKET ( 128° - ANGLE )
Figure imgf000008_0001
BUILT-IN GUIDE-SOCKET ( 128° - ANGLE ) TEΪTSION-KNOB.' TENSION-KNOB
SLOTTED HOOK POR SECURING REAR-END OF BLADE SLOTTED HOOK -
15. SMALL HIGH TENSION ARTISANS HACKSAW
163. RIGID PRAME IN STEEL-TUBING. 164. HANDLE HORIZONTALLY IN LINE WITH PRAME. - SPARE-BLADES COMPARTMENT.
165. 50 mm SAWBLADE 166. TENSION BOLT 167. BUILT-IN GUIDE-SOCKET ( 128° - ANGLE ) 168. TENSION-KNOB 169. SLOTTED HOOK. IG 16. SMALL TWO-IN-ONE HIGH-TENSION ARTISANS HACKSAW
170. STRONG FRAME IN STEEL -TUBING 171 . HANDLE HORIZONTALLY IN LINE WITH FRAME 172. SAWBLADE 173. SAWBLADE 174. TENSION BOLT 175. TENSION BOLT 176. BUILT-IN GUIDE SOCKET ( 128°- ANGLE 177o BUILT-IN GUIDE-SOCKET ( 128°- ANGLE 178. TENSION KNOB 179. TENSION- KNOB 180. SLOTTED HOOK 181 . SLOTTED HOOK
17< SMALL HIGH-TENSION ARTIST-HACKSAW
182. FRAME : JOINT ALUMINIUM CASTING WITH HANDLE 183. HANDLE IN LINE WITH FRAME 184. EXTERIOR HOLLOW SURFACES 185. 150 mm SAWBLADE 186. TENSIO -BOLT ( CURVED CONFIGURATION )
187* BUILT-IN GUIDE-SOCKET ( 135 - ANGLE ) 188O TENSION KNOB 189. SLOTTED HOOK
18, SMALL HIGH-TENSION JEWELLERS HACKSAW
190. FRAME JOINT CASTING WITH HANDLE -LOW CLEARANCE: 15. m, 191. HANDLE IN LINE WITH PRAME. 192. EXTERIOR HOLLOW SURFACES 193. 150 mm SAWBLADE 194. TENSION BOLT 195. BUILT-IN GUIDE-SOCKET ( 90° - ANGLE ) 196. TENSION KNOB 197. BLADE-SETTING BOLT 198. BUILT-IN GUIDE-SOCKET ( 180° - ANGLE ) 199. BLADE-ADJUSTMENT KNOB.
19. SMALL HIGH-TENSION JEWELLERS HACKSAW
200. JOINT CASTING WITH HANDLE - LOW CLEARANCE 20 mm. 201. FRAME AND HANDLE HORIZONTALLY IN LINE 202. EXTERIOR HOLLOW SURFACE 203. 1 0 mm SAWBLADE 204. TENSION BOLT 205. GUIDE-SOCKET ( 90° - ANGLE ) 206. TENSION KNOB. 207. BLADE-SETTING BOLT 208. GUIDE-SOCKET (180° -ANGLE ) 209. BLADE-ADJUSTMENT KNOB IG 1
20. SMALL HIGH-TENSION JEWELLERS HACKSAW
210. PRAME: JOINT-CASTING WITH HANDLE -LOW CLEARANCE: 25mm. 211. HANDLE : JOINT CASTING - HOLE AT END POR HOOK IN 212. EXTERIOR HOLLOW SURFACES 213. 150 mm SAWBLADE. 214. TENSION BOLT. 215. GUILE-SOCKET ( 90°- ANGLE ) 216. TENSION KNOB. 217. BLADE-SETTING BOLT 218. GUIDE-SOCKET ( 1δO°- ANGLE ) 219. BLADE-ADJUSTMENT KNOB.
21. SMALL HIGH-TENSION TECHNICIANS HACKSAW
220. Ϊ&A E : JOINT CASTING WITH HANDLE ( LOW CLEARANCE- 45mm. 221. HANDLE:JOINT -CASTING - HOLE AT END . 222. EXTERIOR HOLLOW SURFACE 223. 150 mm BLADE. 224. TENSION BOLT 225. GUIDE-SOCKET ( 90° - ANGLE ) 226. TENSION KNOB 227. BLADE-SETTING BOLT 228. GUIDE-SOCKET ( 180°- ANGLE ) 229. BLADE-ADJUSTMENT KNOB
22. SMALL EXTRA-HIGH-TENSION TECHNICIANS HACKSAW
230. FRAME: JOINT-CASTING WITH HANDLE- LOW . . 231. HANDLE: JOINT CASTING IN ALUMINIUM 232. EXTERIOR HOLLOW SURFACES 233. 1 0 mm SAWBLADE 234. TENSION BOLT 235. GUIDE-SOCKET ( 90°- ANGLE ) 236. TENSION-KNOB
237. TENSION BOLT 238. GUIDE-SOCKET ( 120° - ANGLE ) 239. TENSION KNOB.
23. EXTRA HIGH-TENSION HIGH-ARCH HACKSAW ( 3 DIFFERENT SIZE!
240. FRAME : CASTING IN ALUMINIUM 241. HANDLE : ANY OP THE 2 SLANTED SECTIONS OP THE FRAME
CAN SERVE AS HANDLE
242o EXTERIOR HOLLOW SURFACES
243. ALTERNATIVE BLADES COVERING DIFFERENT FIELDS OF USE. 244. TENSION BOLT 245. GUIDE-SOCKET ( 125 - ANGLE ) 246. TENSION KNOB
247. TENSION BOLT 248. GUIDE-SOCKET ( 125°- *ANGLE )
249. TENSION KNOB IG
24. SPECIALIZED EXTRA-HIGH TENSION HACKSAW ( 3 SIZES )
250. FRAME : JOINT CASTING ( IN ALUMINIUM ) - WITH HANDLE 251 . HANDLE : AS ABOVE . 252. EXTERIOR HOLLOW SURFACES 253. ALTERNATIVE BLADES COVERING A WIDER FIELD OP USE. 254. TENSION BOLT. 255. GUIDE-SOCKET ( 1 15 - ANGLE ) 256. TENSION KNOB 257. TENSION BOLT 258. GUIDE-SOCKET 115° - ANGLE ) 259. TENSION KNOB.-
25. HEAVY DUTY EXTRA-HIGH TENSION HACKSAW ( 3 SIZES )
260. PRAME : JOINT CASTING IN ALUMINIUM - WITH 2 HANDLES 261 . HANDLE : AS ABOVE 262. HANDLE : AS ABOVE . 263. EXTERIOR SURFACES 264. ALTERNATIVE BLADES ' COVERING WIDER FIELD THAN USUAL 265. TENSION BOLT 266. GUIDE-SOCKET ( 1 15 - ANGLE ) 267. TENSION KNOB 268. TENSION BOLT 269. GUIDE-SOCKET 1 15° - ANGLE ) 270. TENSION KNOB
26. EXTRA-HIGH TENSION DOMESTIC HACKSAW ( 3 SIZES )
271 . FRAME : ALUMINIUM CASTING. 272. HANDLE : ANY OF THE 2 CURVED SECTIONS SERVE AS HANDLES 273o EXTERIOR HOLLOW SURFACES 274 . ALTERNATIVE BLADES COVERING A WIDER FIELD OP USE . 275. TENSION BOLT ( CURVED AS ILLUSTRATED. ) 276. CURVED GUIDE-SOCKET 1 15 - ANGLE ) 277. TENSION-KNOB - 278. CURVED TENSION BOLT 279. CURVED GUIDE-SOCKET 1 15° - ANGLE ) 280. TENSION KNOB. '
IG 27. ARTIST - HIGH-TENSION PATTERN SAW wιgH AD USTABLE PRAME ]
FRAME : COMPRISING: UPPER UNIT -
LEFT-HAND LOWER UNIT RIGHT-HAND LOWER UNIT
II II
281. UPPER UNIT u - SHAPED ALUMINIUM CASTING. 282. ASSEMBLING BOLT ( LEFT ) 283. ASSEMBLING BOLT ( RIGHT ) 284. HOLE ON LEFT POR ASSEMBLING BOLT 285. HOLE ON RIGHT POR ASSEMBLING BOLT 286. EXTERIOR HOLLOW SURFACES
287. LEFT-HAND LOWER UNIT - CAST IN ALUMINIUM 288. 150 mm SAWBLADE 289. TENSION BOLT 290. GUIDE-SOCKET (' 1J,20Λ°° - ANGLE )
291. TENSION KNOB 292. EXTERIOR HOLLOW SURFACES 293. REMOVABLE HANDLE 294. THREADED HOLE FOR HANDLE 295. HOLE IN LEFT- LOWER UNIT ( FOR ASSEMBLING BOLT )
296o RIGHT-HAND LOWER UNIT 297. TENSION BOLT 298. GUIDE-SOCKET ( 120ϋ - ANGLE ) 299. TENSION KNOB 300. EXTERIOR HOLLOW SURFACES 301. THREADED HOLE POR HANDLE 302. HOLE IN RIGHT LOWER UNIT ( FOR ASSEMBLING BOLT )
303. PRAME ADJUSTMENT KNOB - ALSO SERVING AS FRAME ASSEMBLY PRAME ASSEMBLY-KNOB.
304. } PRAME ADJUSTMENT KNOB - ALSO SERVING AS
FRAME.ASSEMBLY-KNOB.
CLAIMS ON THE INVENTION

Claims

CLAIMS 1. Key-Structure of the invention, characterized by great versatility, being the first-ever on which structure a large range of high-tension hacksaws
- all in a class of their own - have been built.
2. The socket-angle tension-mechanism characterized by unmatched high-tension capability and the great ease of applying tension to the blade.
3. Duality- general purpose high-tension hacksaws characterized by 2 independent hacksaws sharing one frame. The hacksaws are being used alternatively for uninterrupted work, - not having to change blades in between.
4. Extra High-Tension hacksaws, ranging from small - to very large - with sets of blades for different types of work. Characterized by 2 built-in high-tension guide sockets each.
5. Extra heavy duty high-tension hacksaws characterized by the heavy duty powersaw -blades on which they operate- This being the first-ever hand-operated heavy duty high-tension hacksaw to be introduced.
6. Jewellers high-tension hacksaws ( operating on small - 300 mm blades } - designed for specialized use.
Characterized by Right angle tension-mechanism, being the ultimate angle of applying high-tension with great ease.
7. Extra high-tension hacksaws ranging from small to large with 2 built-in tension guide-sockets each- characterized by guide-sockets and tension bolts of curved configuration.
PCT/ZA2002/000157 2001-10-15 2002-10-15 Hacksaw with high tension saw blade WO2003033197A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200108424 2001-10-15
ZA01/8424 2001-10-15

Publications (1)

Publication Number Publication Date
WO2003033197A1 true WO2003033197A1 (en) 2003-04-24

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PCT/ZA2002/000157 WO2003033197A1 (en) 2001-10-15 2002-10-15 Hacksaw with high tension saw blade

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WO (1) WO2003033197A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103934502A (en) * 2014-05-09 2014-07-23 赵夫超 Bench worker saw with saw blades clamped on two sides

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1382448A (en) * 1920-10-23 1921-06-21 George H Wilkins Hacksaw-frame
FR531505A (en) * 1921-02-24 1922-01-16 Extendable Hacksaw Frame
US1713972A (en) * 1928-03-02 1929-05-21 Engineering Products Corp Inc Hack-saw frame
US2782820A (en) * 1954-01-18 1957-02-26 Dreier Brothers Inc Handsaw

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1382448A (en) * 1920-10-23 1921-06-21 George H Wilkins Hacksaw-frame
FR531505A (en) * 1921-02-24 1922-01-16 Extendable Hacksaw Frame
US1713972A (en) * 1928-03-02 1929-05-21 Engineering Products Corp Inc Hack-saw frame
US2782820A (en) * 1954-01-18 1957-02-26 Dreier Brothers Inc Handsaw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103934502A (en) * 2014-05-09 2014-07-23 赵夫超 Bench worker saw with saw blades clamped on two sides

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