Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth ratcheting tools with such ratchet wheel and combination of such ratchet wheel and a pawl
A ratchet wheel includes an inner periphery and an outer periphery. The outer periphery includes a number of arcuate concave teeth each having two sides and an intersection of the two sides. The ratchet wheel includes a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions, thereby forming asymmetric arcuate concave teeth to provide improved structural strength and improved torque. In another embodiment, the concave teeth are non-arcuate to reduce the formation time for the teeth, thereby reducing the production cost.
This application is a reissue application of U.S. Pat. No. 6,148,695, issued Nov. 21, 2000, and filed on Aug. 3, 1999, with application Ser. No. 09/365,738.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates to a ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth. The present invention also relates to a ratcheting tool, e.g., a ring spanner having a box end in which the ratchet wheel is mounted. The ratchet wheel with asymmetric arcuate concave teeth provides improved structural strength and improved torque. The ratchet wheel with non-arcuate concave teeth is easy to form and thus reduces the production cost.
2. Description of the Related Art
A wide variety of spanners and wrenches have heretofore been provided. Ring spanners are the best choice for driving fasteners (e.g., nuts, bolt heads, etc etc.) in a limited space that is uneasy not easy to access and where it is difficult to operate all kinds of ratcheting tools. Nevertheless, conventional ring spanners have low driving torque. Ratchet type ring spanners have been proposed to solve this problem. A ratchet wheel is mounted in the box end of a ring spanner for driving fasteners at high torque. It is, however, found that, the structural strength of the ratchet wheel is weak, as an outer periphery of the ratchet wheel is processed to form a plurality of arcuate concave teeth with a considerable depth.
The present invention is intended to provide an improved ratchet wheel that mitigates and/or obviates the above problems.
SUMMARY OF THE INVENTIONIt is a primary object of the present invention to provide an improved ratchet wheel has having asymmetric arcuate concave teeth for providing improved structural strength and improved torque.
It is another object of the present invention to provide an improved ratchet wheel that has non-arcuate concave teeth to allow higher production rate rates, as the non-arcuate concave teeth can be formed by means of roll squeezing method, investment casting, or molding. The non-arcuate concave teeth may be symmetric or asymmetric. The ratchet wheel with non-arcuate concave teeth may bear higher torque during ratcheting (i.e., tightening or loosening a fastener).
The present invention also provides a ratcheting tool, e.g., a spanner, equipped with a ratchet wheel in accordance with the present invention. In an embodiment of the invention, the spanner has a box end for receiving a ratcheting wheel with asymmetric arcuate concave teeth. In another embodiment of the invention, the spanner has a box end for receiving a ratcheting wheel with non-arcuate asymmetric concave teeth. In a further embodiment of the invention, the spanner has a box end for receiving a ratcheting wheel with non-arcuate symmetric concave teeth.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
Referring to
Referring to
Difference The difference in the depth of the concave tooth 22 of the ratchet wheel 20 of the present invention and the depth of the concave tooth 6 of the conventional ratchet wheel 5 (
Referring to
In use of the ring spanner equipped with the ratchet wheel 20 in accordance with the present invention, referring to
Referring to
Referring to
Each concave tooth 52 is defined by two sides each including a radially inner linear edge 52a and a radially outer linear edge 52b. Each concave tooth 52 is further defined by a first intersection of the radially inner linear edges 52a of each of the two sides with an adjacent tooth 52 and by a second intersection of the radially outer linear edges 52b of the two sides and which is substantially parallel to the first arcuate intersection. The plurality of concave teeth 52 have an axial extent less than that between the axial ends 51a and 51b and are axially spaced therefrom so that first and second axially spaced portions 53a and 53b are defined between each of the axial ends 51a and 51b and concave teeth 52. Each non-arcuate tooth 52 has third and fourth axial ends 53e that are spaced radially inside from the outer periphery of ratchet wheel 50. Inclined annular walls 53d extend between the outer periphery of the ratchet wheel 50 and the axial ends 53e, with the inclined annular walls 53d having decreasing radial spacing from the outer periphery of the ratchet wheel 50 to the axial ends 53e.
Referring to
According to the above description, it is appreciated that the ratchet wheel with asymmetric arcuate concave teeth in accordance with the present invention provides a higher torque for operation and has improved structural strength as having a thicker wall in the ratchet wheel. The engagement between the ratchet wheel with asymmetric arcuate concave teeth and the pawl with asymmetric arcuate concave teeth is more reliable. The ratchet wheel with non-arcuate concave teeth in accordance with the present invention reduces the production cost for the ratchet wheel. The ratchet wheel with non-arcuate concave teeth also provides a higher torque for operation when the non-arcuate concave teeth is asymmetric. A spanner with the ratchet wheel/pawl combination in accordance with the present invention can be used in a relatively small space. Nevertheless, the ratchet wheel/pawl combination in accordance with the present invention is not limited to be used in the box end of a ring spanner. Namely, the ratchet wheel/pawl combination may be used in other ratcheting tools such as ratchet wrenches.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
Claims
1. A ratchet wheel comprising an inner periphery and an outer periphery, the outer periphery including a plurality of asymmetric arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.
2. A ratchet wheel comprising an inner periphery and an outer periphery, the outer periphery including a plurality of asymmetric non-arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions.
3. The ratchet wheel as claimed in claim 2, wherein said asymmetric non-arcuate concave teeth are not formed by cutting.
4. The ratchet wheel as claimed in claim 2, wherein said asymmetric non-arcuate concave teeth are formed by roll squeezing.
5. The ratchet wheel as claimed in claim 2, wherein said asymmetric non-arcuate concave teeth are formed by investment casting.
6. The ratchet wheel as claimed in claim 2, wherein each said asymmetric non-arcuate concave tooth is trapezoidal.
7. The ratchet wheel as claimed in claim 2, wherein each said asymmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
8. A ratchet wheel comprising an inner periphery and, an outer periphery and first and second axial ends, the outer periphery including a plurality of symmetric non-arcuate concave teeth each having formed into the outer periphery to have a radial depth and be defined by two sides, with the plurality of symmetric teeth radially spaced inwards from the outer periphery, and an by a non-arcuate intersection of the two sides, wherein the plurality of symmetric teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the symmetrical teeth and the plurality of symmetrical teeth are intermediate the first and second axially spaced portions, wherein the ratchet wheel including includes a center, and a radial line from the center to through the non-arcuate intersection dividing divides an angle that is defined between the two sides into two equal angle portions, and wherein each tooth has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
9. The ratchet wheel as claimed in claim 8, wherein said symmetric non-arcuate concave teeth are not formed by cutting.
10. The ratchet wheel as claimed in claim 8, wherein said two sides of each of the symmetric non-arcuate concave teeth are formed by of a formation resulting from roll squeezing.
11. The ratchet wheel as claimed in claim 8, wherein said two sides of each of the symmetric non-arcuate concave teeth are formed by of a formation resulting from investment casting.
12. The ratchet wheel as claimed in claim 8, wherein each said symmetric non-arcuate concave tooth is trapezoidal.
13. The ratchet wheel as claimed in claim 8, wherein each said symmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
14. A ratcheting tool comprising:
- a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end;
- a ratchet wheel rotatably mounted in the hole of the end, the ratchet wheel comprising an inner periphery and an outer periphery, the outer periphery including a plurality of asymmetric arcuate concave teeth each having two sides and an intersection of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions;
- a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth corresponding to the asymmetric arcuate concave teeth of the ratchet wheel; and
- means for biasing the pawl toward a wall defining the compartment.
15. A ratcheting tool comprising:
- a handle and an end connected to the handle, the end including a hole, a compartment, that is open towards the hole, being defined formed in an area between the handle and the end and defined by a wall;
- a ratchet wheel comprising an inner periphery and, an outer periphery and first and second axial ends, the outer periphery including a plurality of asymmetric non-arcuate concave teeth having each formed into the outer periphery to have a radial depth and be defined by two sides, wherein the plurality of asymmetric teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the asymmetric teeth, wherein the plurality of asymmetrical teeth are intermediate the first and second axially spaced portions, with each of the two sides including a radially inner linear edge and an a radially outer linear edge, with each tooth further defined by a first non-arcuate intersection of the inner radial inner linear edge of each of the two sides, the ratchet wheel including a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions with an adjacent tooth and by a second non-arcuate intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first non-arcuate intersection;
- a pawl slidably mounted received in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth each complimentarily corresponding to each of the plurality of asymmetric non-arcuate concave teeth of the ratchet wheel; and
- means for engaging an end of the pawl and biasing the pawl toward a wall portion of the wall defining the compartment;
- wherein the two sides include an operative side and the operative sides of the asymmetric teeth configured to cooperate with the teeth of the pawl in said ratcheting tool during ratcheting for pushing the pawl in each case by a plurality of the operative sides against said wall portion to provide for a reliable engagement of the teeth of the pawl into the asymmetric teeth of the ratchet wheel,
- wherein the second non-arcuate intersection is radially spaced inwards of the outer periphery, wherein the ratchet wheel includes a center, and with a line from the center to the first non-arcuate intersection dividing an angle between the two sides into two unequal angle portions, wherein each tooth of the ratchet wheel has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
16. The ratchet wheel ratcheting tool as claimed in claim 15, wherein said two sides of each of the asymmetric non-arcuate concave teeth are formed by of a formation resulting from roll squeezing.
17. The ratchet wheel as claimed in claim 15, wherein each said asymmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
18. A ratcheting tool comprising:
- a handle and an end connected to the handle, the end including a hole, a compartment being defined in an area between the handle and the end, the compartment having a crescent shape between the hole and a wall defining the compartment;
- a ratchet wheel comprising an inner periphery and, an outer periphery and first and second axial ends, the outer periphery including a plurality of symmetric non-arcuate concave teeth each having formed into the outer periphery to have a radial depth and be defined by two sides radially spaced inwards from the outer periphery, wherein the plurality of symmetric teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the symmetric teeth, wherein the plurality of symmetrical teeth are intermediate the first and second axially spaced portions, with each of the two sides including a radially inner edge and an a radially outer edge, with each symmetric tooth further defined by a first non-arcuate intersection of the radially inner edge of each of the two sides with an adjacent tooth and by a non-arcuate intersection of the radially outer edges of the two sides and which is parallel to the first non-arcuate intersection, wherein the ratchet wheel including a center, a line from the center to the non-arcuate intersection dividing an angle between of the radially outer edges of the two sides into two equal portions is radially spaced inwards of the outer periphery;
- a pawl slidably mounted in the compartment and engaged with the ratchet wheel, the pawl comprising a plurality of teeth each complimentarily corresponding to each of the symmetric non-arcuate concave teeth of the ratchet wheel; and
- means for engaging the pawl and biasing the pawl toward a curved wall portion of the wall defining the compartment;
- wherein the two sides include an operative side and the operative sides of the symmetric teeth of the ratchet wheel are configured to cooperate with the engaging teeth of the pawl during ratcheting for pushing the pawl in each case by a plurality of the operative sides against said curved wall portion to provide for a reliable engagement of the teeth of the pawl into the symmetric teeth, and
- the ratchet wheel includes a center, with a radial line from the center to the first non-arcuate intersection dividing an angle that is defined between the two sides into two equal angle portions, and
- each tooth has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
19. The ratchet wheel ratcheting tool as claimed in claim 18, wherein said two sides of each of the symmetric non-arcuate concave teeth are formed by of a formation resulting from roll squeezing.
20. The ratchet wheel as claimed in claim 18, wherein each said symmetric non-arcuate concave tooth is of a shape formed as a result of formation other than cutting.
21. A ratcheting tool comprising:
- a handle and an end connected to the handle, the end including a hole having an inner periphery,
- a compartment that is in open communication with the hole, the compartment formed between the inner periphery of the hole and a wall defining the compartment;
- a ratchet wheel having a first axial end, a second axial end, and an outer periphery, with the outer periphery including a plurality of symmetric teeth each formed into the outer periphery to have a radial depth and be defined by two sides, with each of the two sides including a radially inner linear edge and a radially outer linear edge, with each symmetric tooth further defined by a first non-arcuate intersection of the radially inner linear edge of each of the two sides with an adjacent symmetrical tooth and by a non-arcuate intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first non-arcuate intersection; and
- a pawl slidably received in the compartment and engaged with the ratchet wheel, the pawl including a plurality of teeth that each complimentarily correspond to each of the symmetric teeth of the ratchet wheel and being biased by an elastic member toward a curved wall portion of said wall defining the compartment;
- wherein the two sides include an operative side and the operative sides of the symmetric teeth are configured to cooperate with the plurality of teeth of the pawl during ratcheting for pushing the pawl in each case by a plurality of the operative sides against said curved wall portion to provide for a reliable engagement of the teeth of the pawl into the symmetric teeth of the ratchet wheel;
- wherein the ratchet wheel includes a center and a radial line from the center through the first non-arcuate intersection divides an angle that is defined between the two sides into two equal angle portions, with the plurality of symmetric teeth having a maximum radial extent from the center less than the outer periphery; and
- wherein the plurality of symmetrical teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the symmetrical teeth and the plurality of symmetrical teeth are intermediate the first and second axially spaced portions, each tooth having a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined wall extending between an adjacent one of the first and second axially spaced portions and the third axial end, with the inclined wall having decreasing radial spacing from the adjacent one of the first and second axially spaced portions to the third axial end.
22. The ratcheting tool as claimed in claim 21, wherein the first axially spaced portion includes a radially extending annular recess.
23. The ratcheting tool as claimed in claim 22, with the first and second axially spaced portions having equal radial extents.
24. A ratchet wheel in combination with a pawl configured to be slidably received in a compartment of a ratcheting tool that is defined by a wall and to be biased by an elastic member toward a wall portion of said wall,
- the ratchet wheel having a first axial end, a second axial end, and an outer periphery, with the outer periphery including a plurality of symmetric teeth each formed into the outer periphery to have a radial depth and be defined by two sides, with each of the two sides including a radially inner linear edge and a radially outer linear edge, with each tooth further defined by a first non-arcuate intersection of the radially inner linear edge of each of the two sides with an adjacent tooth and by a second non-arcuate intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first non-arcuate intersection,
- the ratchet wheel including a center, with a radial line from the center through the first non-arcuate intersection dividing an angle between the two sides into two equal portions, with the plurality of symmetric teeth having a maximum radial extent from the center less than the outer periphery,
- the pawl including a plurality of teeth that each are formed complimentarily to each of the teeth of the ratchet wheel and that are engaged by a plurality of operative sides of the teeth of the ratchet wheel, the pawl further configured to be pushed by the plurality of operative sides against said wall portion to provide for a reliable engagement of the teeth of the pawl into the teeth of the ratchet wheel,
- the plurality of symmetrical teeth having an axial extent less than an axial extent between the first and second axial ends and being axially spaced from the first and second axial ends to define first and second axially spaced portions, so that the plurality of symmetrical teeth are intermediate the first and second axially spaced portions,
- each of the teeth has a third axial end that is radially spaced inwards from the outer periphery of the ratchet wheel, with an inclined wall extending between an adjacent one of the first and second axial spaced portions and the third axial end, with the inclined wall having decreasing radial spacing from the adjacent one of the first and second axially spaced portions to the third axial end.
25. The ratchet wheel as claimed in claim 8, wherein the angle between the two sides is of 90 degrees, so that said angle portions are each of 45 degrees.
26. The ratchet wheel as claimed in claim 25, wherein said two sides of each of the symmetric teeth are of a formation resulting from roll squeezing.
27. The ratcheting tool as claimed in claim 15, wherein said angle is of 90 degrees and said two unequal portions are selected from either of 30 and 60 degrees and of 40 and 50 degrees.
28. The ratcheting tool as claimed in claim 15, wherein said engaging and biasing means is an elastic member that is disposed in the compartment and is engaged with an end of the pawl.
29. The ratchet wheel as claimed in claim 18, wherein the angle between the two sides is of 90 degrees so that the angle portions are each of 45 degrees.
30. The ratcheting tool as claimed in claim 18, wherein said engaging and biasing means is an elastic member that is disposed in the compartment and is engaged with an end of the pawl.
31. A combination of a ratchet wheel and a pawl in a ratcheting tool of a type in which the pawl is configured to be slidably received in a compartment of the ratcheting tool and to be biased by an elastic member towards a curved wall portion of a wall defining the compartment,
- the ratchet wheel having an outer periphery and first and second axial ends, the outer periphery including a plurality of teeth each formed into the outer periphery to have a radial depth and be defined by two sides, wherein the plurality of teeth have an axial extent less than an axial extent between the first and second axial ends and are axially spaced from each of the first and second axial ends so that first and second axially spaced portions are defined between each of the first and second axial ends and the teeth, wherein the plurality of teeth are intermediate the first and second axially spaced portions, with each of the two sides including a radially inner linear edge and a radially outer linear edge, with each tooth further defined by a first intersection of the radially inner linear edge of each of the two sides with an adjacent tooth and by a second intersection of the radially outer linear edges of the two sides and which is substantially parallel to the first intersection,
- the pawl including a plurality of teeth each formed complimentarily to each of the teeth of the ratchet wheel to fill the area between the two facing sides,
- wherein the two sides include an operative side and the plurality of the teeth of the pawl are engaged by a plurality of operative sides of the plurality of teeth, the pawl further configured to cooperate with the plurality of teeth of the ratchet wheel in said ratcheting tool during ratcheting to be pushed by the plurality of operative sides against said curved wall portion to provide for a reliable engagement of the plurality of teeth of the pawl into the plurality of teeth of the ratchet wheel, and
- wherein the ratchet wheel includes a center and a radial line from the center through the first intersection divides an angle that is defined between the two sides into two unequal portions, wherein the first intersection is non-arcuate and is radially spaced inwards from the outer periphery of the ratchet wheel, wherein each tooth has a third axial end, with an inclined annular wall extending between the outer periphery of the ratchet wheel and the third axial end, with the inclined annular wall having decreasing radial spacing from the outer periphery of the ratchet wheel to the third axial end.
32. The combination as claimed in claim 31, wherein said angle is of 90 degrees and said two unequal portions are selected from either of 30 and 60 degrees and of 40 and 50 degrees.
33. The combination as claimed in claim 31, wherein the second intersection is arcuate in shape in a direction parallel to the outer periphery.
34. The combination as claimed in claim 32, wherein the second intersection is arcuate in shape in a direction parallel to the outer periphery.
35. The combination as claimed in claim 31, wherein the first intersection is non-arcuate.
36. The combination as claimed in claim 31, wherein the two sides of each of the teeth of the ratchet wheel are of a formation resulting from roll squeezing.
37. The combination as claimed in claim 32, wherein the two sides of each of the teeth of the ratchet wheel are of a formation resulting from roll squeezing.
38. The combination as claimed in claim 35, wherein the two sides of each of the teeth of the ratchet wheel are of a formation resulting from roll squeezing.
15482 | August 1856 | Gilman |
726012 | April 1903 | Andrew |
810599 | January 1906 | Ansorge |
818761 | April 1906 | Hanes et al. |
841686 | January 1907 | Hatfield |
878657 | February 1908 | Munch |
893097 | July 1908 | Reams |
915446 | March 1909 | Kearnes |
RE13205 | February 1911 | Lane |
1033358 | July 1912 | Turner |
1078059 | November 1913 | Mossberg |
1090578 | March 1914 | Smythe |
1157427 | October 1915 | Seivert |
1194471 | August 1916 | Boosinger |
1261092 | April 1918 | Allen |
1382492 | June 1921 | Evans |
1426127 | August 1922 | Tuttle |
1601767 | October 1926 | Peterson |
1614039 | January 1927 | Mandl |
1639078 | August 1927 | Coe |
1680515 | August 1928 | Gormley |
1733355 | October 1929 | Morse |
1772524 | August 1930 | Seidemann |
1957462 | May 1934 | Kress |
2193984 | March 1940 | Rhinevault |
2201705 | May 1940 | Stone |
2201827 | May 1940 | Froeschl et al. |
2317461 | April 1943 | Jackson |
2542241 | February 1951 | Fors |
2612807 | October 1952 | Hunt |
2657604 | November 1953 | Rueb |
2701977 | February 1955 | Stone |
2735324 | February 1956 | Goldwater et al. |
2764048 | September 1956 | Thompson |
2769360 | November 1956 | Cottrell et al. |
2800821 | July 1957 | Fruscella |
2803980 | August 1957 | Vogel |
2891434 | June 1959 | Lozensky |
2957377 | October 1960 | Hare |
2978081 | April 1961 | Lundin |
3019682 | February 1962 | Hare |
3044591 | July 1962 | Kilness |
3233481 | February 1966 | Bacon |
3250157 | May 1966 | Badger |
3265171 | August 1966 | Kilness |
3269496 | August 1966 | Kilness |
3337014 | August 1967 | Sandrick |
3342229 | September 1967 | Janes |
3393587 | July 1968 | Jolliff et al. |
3393780 | July 1968 | Kilness |
3436992 | April 1969 | Over et al. |
3508455 | April 1970 | Miller |
3575069 | April 1971 | White |
3577816 | May 1971 | Alexander et al. |
3598001 | August 1971 | Thomasian |
3606940 | September 1971 | Finkeldei |
3691876 | September 1972 | Cassidy, Jr. |
3713356 | January 1973 | Knudsen |
3742788 | July 1973 | Priest |
3783703 | January 1974 | Trimble et al. |
3838614 | October 1974 | O'Donnell |
3866492 | February 1975 | Knoll |
3908487 | September 1975 | Plaw |
3970155 | July 20, 1976 | Otto |
4053037 | October 11, 1977 | Solomon |
4070932 | January 31, 1978 | Jeannotte |
4111077 | September 5, 1978 | Cummings et al. |
4128025 | December 5, 1978 | Main et al. |
4147076 | April 3, 1979 | Wright et al. |
4257507 | March 24, 1981 | Solomon |
4274311 | June 23, 1981 | Ebert |
4277989 | July 14, 1981 | Tracy |
4277990 | July 14, 1981 | Hall |
4308768 | January 5, 1982 | Wagner |
4308769 | January 5, 1982 | Rantanen |
4328720 | May 11, 1982 | Shiel |
4336728 | June 29, 1982 | Deibert |
4406186 | September 27, 1983 | Gummow |
4420995 | December 20, 1983 | Roberts |
4485700 | December 4, 1984 | Colvin |
4488460 | December 18, 1984 | Ballone et al. |
4512218 | April 23, 1985 | Chow |
4515044 | May 7, 1985 | Harstad |
4520697 | June 4, 1985 | Moetteli |
4631988 | December 30, 1986 | Colvin |
4631990 | December 30, 1986 | Hughes |
4662251 | May 5, 1987 | Kohal |
4709600 | December 1, 1987 | Mierbach et al. |
4722252 | February 2, 1988 | Fulcher et al. |
4722253 | February 2, 1988 | Chow |
4762033 | August 9, 1988 | Chow |
4770072 | September 13, 1988 | Neuhaus |
4777852 | October 18, 1988 | Herman et al. |
4796492 | January 10, 1989 | Liou |
4807500 | February 28, 1989 | Main |
4862775 | September 5, 1989 | Chow |
4869138 | September 26, 1989 | Farris |
4903554 | February 27, 1990 | Colvin |
4924737 | May 15, 1990 | Gummow |
4934220 | June 19, 1990 | Slusar et al. |
4986147 | January 22, 1991 | Cooper |
4991468 | February 12, 1991 | Lee |
5000066 | March 19, 1991 | Gentiluomo |
5012705 | May 7, 1991 | Chow |
5038452 | August 13, 1991 | Beugelsdyk et al. |
5076121 | December 31, 1991 | Fosella |
5095781 | March 17, 1992 | Blake et al. |
5144869 | September 8, 1992 | Chow |
5157994 | October 27, 1992 | Krivec |
5178047 | January 12, 1993 | Arnold et al. |
5199330 | April 6, 1993 | Arnold et al. |
5199335 | April 6, 1993 | Arnold et al. |
5230262 | July 27, 1993 | Ahlund et al. |
5231903 | August 3, 1993 | Bockman, Jr. |
5233891 | August 10, 1993 | Arnold et al. |
5271300 | December 21, 1993 | Zurbuchen et al. |
5295422 | March 22, 1994 | Chow |
5347892 | September 20, 1994 | Moetteli |
5392672 | February 28, 1995 | Larson et al. |
5404773 | April 11, 1995 | Norville |
5425291 | June 20, 1995 | Chang |
5448931 | September 12, 1995 | Fossella et al. |
5467672 | November 21, 1995 | Ashby |
5477757 | December 26, 1995 | Maresh |
5495783 | March 5, 1996 | Slusar et al. |
5499560 | March 19, 1996 | Aeschliman |
5501124 | March 26, 1996 | Ashby |
5509333 | April 23, 1996 | Rion |
5522288 | June 4, 1996 | Slusar et al. |
5533427 | July 9, 1996 | Chow |
5535646 | July 16, 1996 | Allen et al. |
5557994 | September 24, 1996 | Nakayama |
5582081 | December 10, 1996 | Lin |
5584220 | December 17, 1996 | Darrah et al. |
5595095 | January 21, 1997 | Hillinger |
5622089 | April 22, 1997 | Gifford, Sr. |
5626061 | May 6, 1997 | Whitley |
5626062 | May 6, 1997 | Colvin |
5636557 | June 10, 1997 | Ma |
5669875 | September 23, 1997 | Van Eerdenburg |
5709137 | January 20, 1998 | Blacklock |
5749272 | May 12, 1998 | Phan |
5782147 | July 21, 1998 | Chaconas et al. |
5794496 | August 18, 1998 | Arnold |
5806383 | September 15, 1998 | Hsieh |
5829326 | November 3, 1998 | Richner |
5842391 | December 1, 1998 | Chaconas |
5857390 | January 12, 1999 | Whiteford |
5873286 | February 23, 1999 | Van Lenten |
5878635 | March 9, 1999 | Hsieh |
5884537 | March 23, 1999 | Chen |
5884538 | March 23, 1999 | Van Lenten |
5887493 | March 30, 1999 | Main |
5901620 | May 11, 1999 | Arnold |
5910197 | June 8, 1999 | Chaconas |
5911798 | June 15, 1999 | Arnold |
5913954 | June 22, 1999 | Arnold et al. |
5927158 | July 27, 1999 | Lin |
5946987 | September 7, 1999 | Wei |
5946989 | September 7, 1999 | Hsieh |
5957009 | September 28, 1999 | McCann |
5964129 | October 12, 1999 | Shiao |
5970552 | October 26, 1999 | Kwiecien et al. |
5979274 | November 9, 1999 | Hsieh |
5996453 | December 7, 1999 | Blacklock |
6000302 | December 14, 1999 | Chiang |
6006631 | December 28, 1999 | Miner et al. |
6044731 | April 4, 2000 | Hsieh |
6065374 | May 23, 2000 | Taggart |
6125722 | October 3, 2000 | Hopper, Jr. et al. |
6134990 | October 24, 2000 | Ling et al. |
6134991 | October 24, 2000 | Chaconas |
D433896 | November 21, 2000 | Wei |
D434292 | November 28, 2000 | Hsieh |
6152826 | November 28, 2000 | Profeta et al. |
6155140 | December 5, 2000 | Tsai |
6161454 | December 19, 2000 | Chaconas |
6164167 | December 26, 2000 | Chen |
6205889 | March 27, 2001 | Hsieh |
6209423 | April 3, 2001 | Shiao |
6216563 | April 17, 2001 | Hsieh |
6216567 | April 17, 2001 | Hu |
6220123 | April 24, 2001 | Chen |
6230591 | May 15, 2001 | Ling et al. |
6240813 | June 5, 2001 | Hyatt |
6257096 | July 10, 2001 | Ling |
6257097 | July 10, 2001 | I-He |
6260448 | July 17, 2001 | Chaconas |
6260449 | July 17, 2001 | I-He |
6263767 | July 24, 2001 | Hu |
6282991 | September 4, 2001 | Hu |
6282992 | September 4, 2001 | Hu |
6282993 | September 4, 2001 | Forman et al. |
6301998 | October 16, 2001 | Hu |
6308594 | October 30, 2001 | Cheng |
6332382 | December 25, 2001 | Anderson et al. |
6334373 | January 1, 2002 | Hsieh |
6382051 | May 7, 2002 | Chang |
6382052 | May 7, 2002 | Chen |
6386072 | May 14, 2002 | Yuan-Chin et al. |
6427560 | August 6, 2002 | Shea |
6431031 | August 13, 2002 | Hu |
6435062 | August 20, 2002 | McCann |
6435063 | August 20, 2002 | Chen |
6450066 | September 17, 2002 | Hu |
6450068 | September 17, 2002 | Hu |
6453779 | September 24, 2002 | Hu |
6457387 | October 1, 2002 | Hu |
6457388 | October 1, 2002 | Chen |
6457389 | October 1, 2002 | Hu |
6488136 | December 3, 2002 | Chang |
6516691 | February 11, 2003 | Wei |
6520051 | February 18, 2003 | Hu |
6539825 | April 1, 2003 | Lin |
6568299 | May 27, 2003 | Hu |
6591717 | July 15, 2003 | Wei |
6629477 | October 7, 2003 | Ling et al. |
6644148 | November 11, 2003 | Hu |
6647832 | November 18, 2003 | Hu |
6662693 | December 16, 2003 | Hu |
6666112 | December 23, 2003 | Hu |
6666117 | December 23, 2003 | Hu |
6688195 | February 10, 2004 | Hsien |
6708586 | March 23, 2004 | Chen |
6722234 | April 20, 2004 | Hu |
6732614 | May 11, 2004 | Hu |
6745647 | June 8, 2004 | Wang |
6748825 | June 15, 2004 | Hsu |
6758641 | July 6, 2004 | Hu |
6761092 | July 13, 2004 | Hsien |
20020023520 | February 28, 2002 | Hu |
20020162423 | November 7, 2002 | Hu |
20020162424 | November 7, 2002 | Hu |
20020166417 | November 14, 2002 | Hu |
20020166418 | November 14, 2002 | Hsieh |
20020194950 | December 26, 2002 | Hu |
20030010159 | January 16, 2003 | Hu |
20030070512 | April 17, 2003 | Hu |
20030121373 | July 3, 2003 | Ling et al. |
20030154826 | August 21, 2003 | Lee |
20030196522 | October 23, 2003 | Hu |
20040093995 | May 20, 2004 | Hu |
373436 | April 1923 | DE |
921198 | July 1949 | DE |
1810811 | June 1970 | DE |
9907467 | September 1999 | DE |
9910932 | September 1999 | DE |
498276 | January 1920 | FR |
1559093 | January 1980 | GB |
2135226 | August 1984 | GB |
130638 | February 1977 | TW |
212343 | May 1982 | TW |
310649 | January 1986 | TW |
- Complaint for Declatory Judgment of Noninfringement, Unenforceability, and Invalidity of a Patent, dated Sep. 26, 2002.
- Amended Complaint for Declatory Judgment of Noninfringement, Unenforceability, and Invalidity of a Patent, dated Sep. 19, 2003.
- Plaintiff's Second Supplemental Response to Interrogatory No. 3 of Defendant's First Set of Interrogatories, dated Apr. 21, 2004.
- Tool and Manufacturing Engineers Handbook, 1976, 3rd Edition, pp. 6-48.
- EPO Search Report for Appln. No. EP 00 12 6902 dated Feb. 17, 2003 (3p.) 0570.
Type: Grant
Filed: Nov 21, 2002
Date of Patent: Apr 3, 2012
Inventor: Bobby Hu (Taichung)
Primary Examiner: Debra S Meislin
Attorney: Kamrath IP Lawfirm, PA
Application Number: 10/301,491
International Classification: B25B 13/46 (20060101);