EP1510293A1 - Ratschenschlüssel - Google Patents

Ratschenschlüssel Download PDF

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Publication number
EP1510293A1
EP1510293A1 EP03019148A EP03019148A EP1510293A1 EP 1510293 A1 EP1510293 A1 EP 1510293A1 EP 03019148 A EP03019148 A EP 03019148A EP 03019148 A EP03019148 A EP 03019148A EP 1510293 A1 EP1510293 A1 EP 1510293A1
Authority
EP
European Patent Office
Prior art keywords
space
ratchet wrench
pawls
spring
handle
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP03019148A
Other languages
English (en)
French (fr)
Other versions
EP1510293B1 (de
Inventor
Terence Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE60321337T priority Critical patent/DE60321337D1/de
Priority to EP03019148A priority patent/EP1510293B1/de
Publication of EP1510293A1 publication Critical patent/EP1510293A1/de
Application granted granted Critical
Publication of EP1510293B1 publication Critical patent/EP1510293B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B25B13/463—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel

Definitions

  • the present invention relates to a ratchet wrench.
  • a conventional ratchet wrench 50 includes a handle 52 and an annular head 54 formed at an end of the handle 52.
  • the annular head 52 defines a circular space 56, a crescent space 58 communicated with the circular space 56, a groove 60 in a side thereof and a recess 62 communicated with the groove.
  • a spring 64 and a ball detent 66 are put in the recess 62.
  • a direction switch 68 is put in and can be moved along the groove 60.
  • a friction plate 70 is formed on the direction switch 68 for frictional contact with a user's finger.
  • the direction switch 68 defines two recesses 72 and 74 in a side and a space 76 in an opposite side.
  • the ball detent 66 is put in the recess 72 or 74 for keeping the direction switch 68 in one of two positions.
  • the friction plate 70 defines an aperture 80 communicated with the space 76.
  • a V-shaped elastic element 80 includes two helical ends 82 and 84.
  • the V-shaped elastic element 78 is put in the space 76.
  • a tab 86 is inserted in the space 76 for preventing the elastic element 80 from faltering in the space 76.
  • the tab 86 defines an aperture 88.
  • a pin 90 is fit in the apertures 78 and 88 and put between the helical ends 82 and 84 so as to avoid the elastic element 80 escaping the space 76.
  • a pawl 92 includes two recesses 94 and 96 defined in a side and teeth 98 formed on an opposite side.
  • the pawl 92 is put in the crescent space 58.
  • the helical end 82 can be put in the recess 94, or the helical end 84 in the recess 96.
  • the annular gear 100 is put in the circular space 56.
  • the annular gear 100 includes teeth 102 formed on an external side thereof for engagement with the teeth 98.
  • the direction switch 68 is moved to a right-hand end of the groove 60 so that the ball detent 66 enters the recess 74.
  • a right-hand end of the pawl 92 is moved to a right-hand end of the crescent space 58.
  • the annular head 10 can drive the annular gear 100 clockwise, but not vice versa.
  • the direction switch 68 is moved to a left-hand end of the groove 60 so that the ball detent 66 enters the recess 74.
  • a left-hand end of the pawl 92 is moved to a left-hand end of the crescent space 58.
  • the annular head 10 can drive the annular gear 100 counterclockwise, but not vice versa.
  • This conventional ratchet wrench 50 includes many elements. Many of its elements require fine fabrication, e.g., the direction switch 68 and the elastic element 80. It takes a lot of time to fabricate these elements. It also takes a lot time to assemble these elements. This conventional ratchet wrench 50 is very complicated in structure. As result, the cost of manufacturing of this conventional ratchet wrench 50 is high.
  • the present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
  • a ratchet wrench includes a handle and an annular head from which the handle projects.
  • the annular head defines a first space, a second space communicated with the first space and a third space communicated with the second space.
  • An annular gear is rotationally put in the first space.
  • the annular gear includes a toothed external face.
  • a direction controller is put in the second space.
  • the direction controller includes two pawls and a spring installed between the pawls. Each of the pawls includes a toothed face.
  • the direction switch is rotationally mounted on the handle and partially put in the third space for bringing the toothed face of selective one of the pawls into engagement with the toothed external face of the annular gear.
  • Figure 1 is a perspective view of a ratchet wrench according to the preferred embodiment of the present invention.
  • Figure 2 is an exploded view of the ratchet wrench of Figure 1.
  • Figure 3 is a cutaway view of the ratchet wrench of Figure 1.
  • Figure 4 is a cross-sectional view of the shown in Figure 1.
  • Figure 5 is a cross-sectional view of the ratchet wrench of Figure 11 in a position for driving a bolt or nut counterclockwise.
  • Figure 6 is similar to Figure 5 but showing the ratchet wrench in a position for driving a bolt or nut clockwise.
  • Figure 7 is an exploded view of a ratchet wrench according to prior art.
  • Figure 8 is a cross-sectional view of the ratchet wrench of Figure 7.
  • Figure 9 is a cross-sectional view of the ratchet wrench of Figure 7 in a position for driving a bolt or nut clockwise.
  • Figure 10 is similar to Figure 9 but showing the ratchet wrench in a position for driving a bolt or nut counterclockwise.
  • a ratchet wrench 1 includes a handle 10 and an annular head 11 from which the handle 10 projects.
  • the annular head 11 defines a circular space 12, a crescent space 13 communicated with the circular space 12 and a semi-circular space 14 communicated with the crescent space 13.
  • An annular groove 121 is defined in the wall of the circular space 12.
  • Two recesses 15 and 16 are defined in the handle 10 near the semi-circular space 14.
  • a direction controller 30 is put in the crescent space 13.
  • the direction controller 30 includes two pawls 31 and 32 and a spring 33 for connecting the pawl 31 with the pawl 32.
  • the pawl 31 includes a top, a bottom, a planar side, a toothed side 312, an arched side, a boss 311 formed on the planar side and rod 313 formed on the top.
  • the pawl 32 includes a top, a bottom, a planar side, a toothed side 322, an arched side, a boss 321 formed on the planar side and rod 323 formed on the top.
  • the spring 33 includes an end in which the boss 311 is fit and an opposite end in which the boss 321 is fit.
  • the pawl 31 is firmly connected with the pawl 32 by means of the spring 33.
  • an O-ring 22 is put in the circular space 12.
  • the O-ring 22 includes an annular groove 24 defined in an external face thereof.
  • a C-ring 23 includes an internal edge put in the annular groove 24 and an external edge put in the annular groove 121.
  • the O-ring 22 is firmly attached to the annular head 11 by means of the C-ring 23.
  • An annular gear 20 is put in the circular space 12.
  • the annular gear 20 is put on the O-ring 22 rotationally.
  • the annular gear 20 includes a toothed internal face for engagement with a bolt or nut and a toothed external face 21 for selective engagement with the pawl 31 or 32.
  • a spring 152 and a rod detent 151 are put in the recess 15.
  • a spring 162 and a ball detent 162 are put in the recess 16.
  • a direction switch 40 includes a disc 41 and a lever 43 extending from the disc 41.
  • the disc 41 includes a bottom in which a space 42, an aperture 44, two recesses 45 and 46 are defined.
  • the wall of the space 42 includes a first end 421 and a second end 422.
  • the disc 41 is put in the semi-circular space 14.
  • the rod detent 151 extends into the aperture 44.
  • the direction switch 40 is installed on the handle 10 and the annular head 11 rotationally.
  • the ball detent 16 selectively enters the recess 45 or 46.
  • the direction switch 40 is in a first position.
  • the ball detent 16 enters the recess 46 so as to retain the direction switch 40 in the first position.
  • the first end 421 of the wall of the space 42 pushes the rod 323.
  • the pawl 31 is moved into a left-hand end of the crescent space 13.
  • the annular head 11 can drive the annular gear 20 counterclockwise, but not vice versa.
  • the direction switch 40 is in a second position.
  • the ball detent 16 enters the recess 46 so as to retain the direction switch 40 in the second position.
  • the second end 422 of the wall of the space 42 pushes the rod 323.
  • the pawl 32 is moved into a right-hand end of the crescent space 13.
  • the annular head 11 can drive the annular gear 20 clockwise, but not vice versa.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP03019148A 2003-08-25 2003-08-25 Ratschenschlüssel Expired - Lifetime EP1510293B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE60321337T DE60321337D1 (de) 2003-08-25 2003-08-25 Ratschenschlüssel
EP03019148A EP1510293B1 (de) 2003-08-25 2003-08-25 Ratschenschlüssel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03019148A EP1510293B1 (de) 2003-08-25 2003-08-25 Ratschenschlüssel

Publications (2)

Publication Number Publication Date
EP1510293A1 true EP1510293A1 (de) 2005-03-02
EP1510293B1 EP1510293B1 (de) 2008-05-28

Family

ID=34089595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03019148A Expired - Lifetime EP1510293B1 (de) 2003-08-25 2003-08-25 Ratschenschlüssel

Country Status (2)

Country Link
EP (1) EP1510293B1 (de)
DE (1) DE60321337D1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1537952A1 (de) * 2003-12-01 2005-06-08 Terence Chen Richtungsselektiver Ratschenschlüssel
EP1808270A1 (de) * 2006-01-17 2007-07-18 Terence Chen Richtungsselektiver Ratschenschlüssel
US8607671B2 (en) 2010-08-06 2013-12-17 American Grease Stick Company Wrench with trigger
RU2554266C1 (ru) * 2014-01-09 2015-06-27 И-Минь У Многофункциональный гаечный ключ
US12551991B2 (en) 2021-09-13 2026-02-17 Milwaukee Electric Tool Corporation Tool with ratchet mechanism

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436992A (en) * 1967-03-10 1969-04-08 Pendleton Tool Ind Inc Reversible ratchet wrench with floating pawls
US5174176A (en) * 1991-12-09 1992-12-29 Snap-On Tools Corporation Reversible rachet wrench with integrated dual pawl and spring and cam unit
US5199330A (en) * 1991-10-01 1993-04-06 Easco Hand Tools, Inc. Reversing ratchet wrench
GB2353746A (en) * 1999-09-04 2001-03-07 Jack Lee Twin pawled ratchet tool
US20020026858A1 (en) * 2000-09-01 2002-03-07 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6386072B1 (en) * 2001-03-21 2002-05-14 Chi Yuan-Chin Ratchet tool
US6513409B1 (en) * 2002-01-25 2003-02-04 Daniel Lee Ratchet wrench structure
US6516930B2 (en) * 2000-12-29 2003-02-11 Ching Chen Ratchet mechanism for tools
US6516692B1 (en) * 2002-07-16 2003-02-11 Chih-Ching Hsien Pawl controlling device for ratchet tools
US20030051583A1 (en) * 2001-09-20 2003-03-20 Yen-Wen Lin Single direction ratcheting wrench with stuck prevention and ratcheting direction indication

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436992A (en) * 1967-03-10 1969-04-08 Pendleton Tool Ind Inc Reversible ratchet wrench with floating pawls
US5199330A (en) * 1991-10-01 1993-04-06 Easco Hand Tools, Inc. Reversing ratchet wrench
US5174176A (en) * 1991-12-09 1992-12-29 Snap-On Tools Corporation Reversible rachet wrench with integrated dual pawl and spring and cam unit
GB2353746A (en) * 1999-09-04 2001-03-07 Jack Lee Twin pawled ratchet tool
US20020026858A1 (en) * 2000-09-01 2002-03-07 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6516930B2 (en) * 2000-12-29 2003-02-11 Ching Chen Ratchet mechanism for tools
US6386072B1 (en) * 2001-03-21 2002-05-14 Chi Yuan-Chin Ratchet tool
US20030051583A1 (en) * 2001-09-20 2003-03-20 Yen-Wen Lin Single direction ratcheting wrench with stuck prevention and ratcheting direction indication
US6513409B1 (en) * 2002-01-25 2003-02-04 Daniel Lee Ratchet wrench structure
US6516692B1 (en) * 2002-07-16 2003-02-11 Chih-Ching Hsien Pawl controlling device for ratchet tools

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1537952A1 (de) * 2003-12-01 2005-06-08 Terence Chen Richtungsselektiver Ratschenschlüssel
EP1808270A1 (de) * 2006-01-17 2007-07-18 Terence Chen Richtungsselektiver Ratschenschlüssel
US8607671B2 (en) 2010-08-06 2013-12-17 American Grease Stick Company Wrench with trigger
RU2554266C1 (ru) * 2014-01-09 2015-06-27 И-Минь У Многофункциональный гаечный ключ
US12551991B2 (en) 2021-09-13 2026-02-17 Milwaukee Electric Tool Corporation Tool with ratchet mechanism

Also Published As

Publication number Publication date
DE60321337D1 (de) 2008-07-10
EP1510293B1 (de) 2008-05-28

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