USRE41260E1 - Retainer ring for securely retaining a first object to a second object - Google Patents

Retainer ring for securely retaining a first object to a second object Download PDF

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Publication number
USRE41260E1
USRE41260E1 US11/366,985 US36698506A USRE41260E US RE41260 E1 USRE41260 E1 US RE41260E1 US 36698506 A US36698506 A US 36698506A US RE41260 E USRE41260 E US RE41260E
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Prior art keywords
retainer ring
combination
receiving compartment
shank
annular groove
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US11/366,985
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Bobby Hu
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Individual
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Individual
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    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool

Definitions

  • FIG. 6A of the drawings illustrates a conventional retainer ring 1 engaged in an annular groove 3 defined in an inner periphery of a receiving compartment 2 of an object, e.g., a screwdriver shank.
  • the retainer ring 1 could move to a position shown in FIG. 6B under the action of gravity. This is because there is no means for securely retaining the retainer ring 1 in the annular groove 3 .
  • FIG. 7 it would be impossible to mount a bit 4 into the receiving compartment 2 , as the retainer ring 1 protrudes too much outward to be inserted into the receiving compartment 2 .
  • a combination of a first object, a second object, and a retainer ring comprises a first object including a retaining groove in an end thereof, a second object including a receiving compartment for removably receiving the end of the first object, and a resilient retainer ring.
  • the receiving compartment has a plurality of corners.
  • An annular groove is defined in an inner periphery defining the receiving compartment.
  • the resilient retainer ring is received in the annular groove of the second object and includes at least two pressing sections and at least one engaging section. Each pressing section presses against a bottom wall defining the annular groove of the second object.
  • the engaging section is exposed to at least one corner of the receiving compartment such that the engaging section has at least a portion engaged in the retaining groove when the end of the first object is received in the receiving compartment.
  • FIG. 1 is an exploded perspective view of a screwdriver, a bit, and a retainer ring in accordance with the present invention.
  • FIG. 2A is a sectional view illustrating engagement of the retainer ring and a shank of the screwdriver.
  • FIG. 2B is a view similar to FIG. 2A , wherein the retainer ring is rotated 30° in a counterclockwise direction.
  • FIG. 2C is a view similar to FIG. 2A , wherein the retainer ring is rotated 60° in a counterclockwise direction.
  • FIG. 3B is a view similar to FIG. 3A , wherein the retainer ring is rotated 30° in a counterclockwise direction.
  • FIG. 3C is a view similar to FIG. 3A , wherein the retainer ring is rotated 60° in a counterclockwise direction.
  • FIG. 4A is a sectional view illustrating engagement of another modified embodiment of the retainer ring and a shank of the screwdriver.
  • FIG. 4B is a view similar to FIG. 4A , wherein the retainer ring is rotated 30° in a counterclockwise direction.
  • FIG. 4C is a view similar to FIG. 4A , wherein the retainer ring is rotated 60° in a counterclockwise direction.
  • FIG. 5A is a sectional view illustrating engagement of a further modified embodiment of the retainer ring and a shank of the screwdriver.
  • FIG. 5B is a view similar to FIG. 5A , wherein the retainer ring is rotated 30° in a counterclockwise direction.
  • FIG. 5C is a view similar to FIG. 5A , wherein the retainer ring is rotated 60° in a counterclockwise direction.
  • FIG. 6A is a sectional view illustrating engagement between a conventional retainer ring and a screwdriver shank.
  • FIG. 6B is a sectional view illustrating anomalous engagement between the retainer ring and the screwdriver shank in FIG. 6 A.
  • FIG. 7 is a schematic sectional view illustrating difficulty of attaching a bit to the screwdriver shank when the retainer ring is anomalously engaged with the screwdriver shank.
  • a retainer ring 10 is provided to securely retain a first object, e.g., a bit 30 to a second object, e.g., a shank 22 of a screwdriver 20 .
  • the screwdriver 20 includes a handle 21 attached to an end of the shank 22 .
  • a generally hexagonal receiving compartment 24 is defined in the other end 23 of the shank.
  • An annular groove 25 is defined in an inner periphery defining the receiving compartment 24 .
  • the retainer ring 10 is a substantially C-shaped resilient ring having an opening 13 between the distal ends 11 a thereof.
  • the retainer ring 10 includes at least two radially outward pressing sections 11 that press against a bottom wall defining the annular groove 25 of the shank 25 and at least one radially inward engaging section 12 .
  • the engaging section 12 is located in a position radially inward of the pressing sections 11 .
  • the retainer ring 10 includes three pressing sections 11 located on the distal ends 11 a of the retainer ring 10 and a section 11 b of the retainer ring 10 opposite to the openings 13 of the retainer ring 10 .
  • the opening 13 of the retainer ring 10 is smaller than a half of a circumference of a circle on which the retainer ring 10 locates. Further, the retainer ring 10 includes two engaging sections 12 on both sides of the section 11 b opposite to the opening 13 of the retainer ring 10 .
  • the retainer ring 10 when the retainer ring 10 is mounted into the annular groove 25 of the shank 22 of the screwdriver 20 , the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging sections 12 are respectively exposed to the second corner and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
  • each engaging section 12 has a portion P engaged in a retaining groove 31 in a hexagonal end of the bit 30 .
  • the retainer ring 10 when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging sections 12 are respectively exposed to the third corner and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
  • each engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30 .
  • the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the retainer ring 10 when the retaining ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated through 30° along the counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging sections 12 are respectively exposed to the third corner and the sixth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
  • each engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30 .
  • the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • FIG. 3A illustrates a modified embodiment of the retainer ring 10 , wherein like numerals denote like elements.
  • the retainer ring 10 includes two radially outward pressing sections 11 and a radially inward engaging section 12 between the pressing sections 11 .
  • One of the pressing sections 11 has a length approximately half of the retainer ring 10 , while the other pressing section 11 is much shorter.
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the three pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the retainer ring 10 when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 is exposed to the fifth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the three pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • FIG. 4A illustrates another modified embodiment of the retainer ring 10 , wherein like numerals denote like elements.
  • the retainer ring 10 includes a radially inward engaging section 12 opposite to the opening 13 of the retainer ring 10 and two radially outward pressing sections ii 11 on both sides of the engaging section 12 .
  • Each radially outward pressing sections 11 includes an associated one of the distal ends (not labeled) of the retainer ring 10 .
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 has two portions P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the retainer ring 10 when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 is exposed to the fourth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the pressing section 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 is engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the retainer ring 10 when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 is exposed to the fourth corner and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging section 12 has two portions P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • FIG. 5A illustrates a further modified embodiment of the retainer ring 10 , wherein like numerals denotes like elements.
  • the retainer ring 10 includes four radially outward pressing sections 11 and three radially inward engaging sections 12 , wherein each engaging section 12 is located between two pressing sections 11 .
  • the retainer ring 10 when the retainer ring 10 is mounted into the annular groove 25 of the shank 22 of the screwdriver 20 , the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging sections 12 are exposed to the second corner, the third corner, the fourth corner, and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging sections 12 have portions P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the retainer ring 10 when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the middle engaging section 12 is exposed to the fourth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the middle engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the retainer ring 10 when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22 , as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging sections 12 are exposed to the third corner, the fourth corner, the fifth corner, and the sixth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
  • the retainer ring 10 when a bit 30 is inserted into the receiving compartment 24 of the shank 22 , the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22 , as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22 . Further, the engaging sections 12 have portions P engaged in the retaining groove 31 of the bit 30 . Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20 .
  • the engaging section(s) 12 of the retainer ring 10 includes at least one portion that is securely engaged in the retaining groove 31 of the bit 30 regardless of the angular position of the retainer ring 10 in the annular groove 25 of the shank 22 of the screwdriver 20 .

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

Abstract

A resilient retainer ring comprises at least two pressing sections and at least one engaging section. Each pressing section presses against a bottom wall defining an annular groove in a receiving compartment of a screwdriver shank when the retainer ring is mounted in the annular groove of the screwdriver shank. The engaging section is exposed to at least one corner of the receiving compartment such that the engaging section has at least a portion engaged in a retaining groove of a bit when an end of the bit is received in the receiving compartment of the screwdriver shank.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a retainer ring for securely retaining a first object, e.g., a bit, to a second object, e.g., a shank of a screwdriver.
2. Description of the Related Art
FIG. 6A of the drawings illustrates a conventional retainer ring 1 engaged in an annular groove 3 defined in an inner periphery of a receiving compartment 2 of an object, e.g., a screwdriver shank. After mounting in the annular groove 3, the retainer ring 1 could move to a position shown in FIG. 6B under the action of gravity. This is because there is no means for securely retaining the retainer ring 1 in the annular groove 3. As a result, as illustrated in FIG. 7, it would be impossible to mount a bit 4 into the receiving compartment 2, as the retainer ring 1 protrudes too much outward to be inserted into the receiving compartment 2.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a retainer ring for securely retaining a first object, e.g., a bit, to a second object, e.g., a screwdriver shank.
In accordance with the present invention, a combination of a first object, a second object, and a retainer ring is provided. The combination comprises a first object including a retaining groove in an end thereof, a second object including a receiving compartment for removably receiving the end of the first object, and a resilient retainer ring. The receiving compartment has a plurality of corners. An annular groove is defined in an inner periphery defining the receiving compartment. The resilient retainer ring is received in the annular groove of the second object and includes at least two pressing sections and at least one engaging section. Each pressing section presses against a bottom wall defining the annular groove of the second object. The engaging section is exposed to at least one corner of the receiving compartment such that the engaging section has at least a portion engaged in the retaining groove when the end of the first object is received in the receiving compartment.
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.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded perspective view of a screwdriver, a bit, and a retainer ring in accordance with the present invention.
FIG. 2A is a sectional view illustrating engagement of the retainer ring and a shank of the screwdriver.
FIG. 2B is a view similar to FIG. 2A, wherein the retainer ring is rotated 30° in a counterclockwise direction.
FIG. 2C is a view similar to FIG. 2A, wherein the retainer ring is rotated 60° in a counterclockwise direction.
FIG. 3A is a sectional view illustrating engagement of a modified embodiment of the retainer ring and a shank of the screwdriver.
FIG. 3B is a view similar to FIG. 3A, wherein the retainer ring is rotated 30° in a counterclockwise direction.
FIG. 3C is a view similar to FIG. 3A, wherein the retainer ring is rotated 60° in a counterclockwise direction.
FIG. 4A is a sectional view illustrating engagement of another modified embodiment of the retainer ring and a shank of the screwdriver.
FIG. 4B is a view similar to FIG. 4A, wherein the retainer ring is rotated 30° in a counterclockwise direction.
FIG. 4C is a view similar to FIG. 4A, wherein the retainer ring is rotated 60° in a counterclockwise direction.
FIG. 5A is a sectional view illustrating engagement of a further modified embodiment of the retainer ring and a shank of the screwdriver.
FIG. 5B is a view similar to FIG. 5A, wherein the retainer ring is rotated 30° in a counterclockwise direction.
FIG. 5C is a view similar to FIG. 5A, wherein the retainer ring is rotated 60° in a counterclockwise direction.
FIG. 6A is a sectional view illustrating engagement between a conventional retainer ring and a screwdriver shank.
FIG. 6B is a sectional view illustrating anomalous engagement between the retainer ring and the screwdriver shank in FIG. 6A.
FIG. 7 is a schematic sectional view illustrating difficulty of attaching a bit to the screwdriver shank when the retainer ring is anomalously engaged with the screwdriver shank.
 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIG. 1, in accordance with the present invention, a retainer ring 10 is provided to securely retain a first object, e.g., a bit 30 to a second object, e.g., a shank 22 of a screwdriver 20. The screwdriver 20 includes a handle 21 attached to an end of the shank 22. A generally hexagonal receiving compartment 24 is defined in the other end 23 of the shank. An annular groove 25 is defined in an inner periphery defining the receiving compartment 24.
Referring to FIGS. 1 and 2A, the retainer ring 10 is a substantially C-shaped resilient ring having an opening 13 between the distal ends 11a thereof. The retainer ring 10 includes at least two radially outward pressing sections 11 that press against a bottom wall defining the annular groove 25 of the shank 25 and at least one radially inward engaging section 12. Namely, the engaging section 12 is located in a position radially inward of the pressing sections 11. In this embodiment, the retainer ring 10 includes three pressing sections 11 located on the distal ends 11a of the retainer ring 10 and a section 11b of the retainer ring 10 opposite to the openings 13 of the retainer ring 10. It is noted that the opening 13 of the retainer ring 10 is smaller than a half of a circumference of a circle on which the retainer ring 10 locates. Further, the retainer ring 10 includes two engaging sections 12 on both sides of the section 11b opposite to the opening 13 of the retainer ring 10.
As illustrated in FIG. 2A, when the retainer ring 10 is mounted into the annular groove 25 of the shank 22 of the screwdriver 20, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging sections 12 are respectively exposed to the second corner and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the three pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, each engaging section 12 has a portion P engaged in a retaining groove 31 in a hexagonal end of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 2B, when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging sections 12 are respectively exposed to the third corner and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move to wobble in the annular groove 25 of the shank 22, as the three pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, each engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 2C, when the retaining ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated through 30° along the counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging sections 12 are respectively exposed to the third corner and the sixth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the three pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, each engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
FIG. 3A illustrates a modified embodiment of the retainer ring 10, wherein like numerals denote like elements. In this embodiment, the retainer ring 10 includes two radially outward pressing sections 11 and a radially inward engaging section 12 between the pressing sections 11. One of the pressing sections 11 has a length approximately half of the retainer ring 10, while the other pressing section 11 is much shorter.
As illustrated in FIG. 3A, when the retainer ring 10 is mounted into the annular groove 25 of the shank 22 of the screwdriver 20, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 is exposed to the fourth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 3D 3B, when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 is exposed to the fifth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the three pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 3C, when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 is exposed to the fifth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the three pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
FIG. 4A illustrates another modified embodiment of the retainer ring 10, wherein like numerals denote like elements. In this embodiment, the retainer ring 10 includes a radially inward engaging section 12 opposite to the opening 13 of the retainer ring 10 and two radially outward pressing sections ii11on both sides of the engaging section 12. Each radially outward pressing sections 11 includes an associated one of the distal ends (not labeled) of the retainer ring 10.
As illustrated in FIG. 4A, when the retainer ring 10 is mounted into the annular groove 25 of the shank 22 of the screwdriver 20, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular grooves 25 of the shank 22. Further, the engaging section 12 is exposed to the third corner and the fourth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 has two portions P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 4B when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 is exposed to the fourth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the pressing section 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 is engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 4C, when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 is exposed to the fourth corner and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging section 12 has two portions P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
FIG. 5A illustrates a further modified embodiment of the retainer ring 10, wherein like numerals denotes like elements. In this embodiment, the retainer ring 10 includes four radially outward pressing sections 11 and three radially inward engaging sections 12, wherein each engaging section 12 is located between two pressing sections 11.
As illustrated in FIG. 5A, when the retainer ring 10 is mounted into the annular groove 25 of the shank 22 of the screwdriver 20, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging sections 12 are exposed to the second corner, the third corner, the fourth corner, and the fifth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging sections 12 have portions P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 5B, when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the middle engaging section 12 is exposed to the fourth corner of the receiving compartment 24 of the shank 22 (see the intersection P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the middle engaging section 12 has a portion P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
Referring to FIG. 5C, when the retainer ring 10 is engaged in the annular groove 25 in another position, e.g., the retainer ring 10 is further rotated 30° in a counterclockwise direction, the retainer ring 10 is securely retained in the annular groove 25 of the shank 22, as the pressing sections 11 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging sections 12 are exposed to the third corner, the fourth corner, the fifth corner, and the sixth corner of the receiving compartment 24 of the shank 22 (see the intersections P).
Thus, when a bit 30 is inserted into the receiving compartment 24 of the shank 22, the retainer ring 10 would not move or wobble in the annular groove 25 of the shank 22, as the pressing sections 11 of the retainer ring 10 press against the bottom wall defining the annular groove 25 of the shank 22. Further, the engaging sections 12 have portions P engaged in the retaining groove 31 of the bit 30. Thus, the bit 30 is securely engaged in the receiving compartment 24 of the screwdriver 20.
According to the above description, it is noted that the engaging section(s) 12 of the retainer ring 10 includes at least one portion that is securely engaged in the retaining groove 31 of the bit 30 regardless of the angular position of the retainer ring 10 in the annular groove 25 of the shank 22 of the screwdriver 20.
It is noted that the numbers and the shapes of the pressing sections 11 and the engaging sections 12 may vary according to the need.
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 form the scope of the invention as hereinafter claimed.

Claims (28)

1. A combination comprising:
a first object including a retaining groove in an end thereof;
a second object including a receiving compartment for removably receiving said end of said first object, said receiving compartment having a plurality of corners, an annular groove being defined in an inner periphery defining said receiving compartment; and
a resilient retainer ring received in the annular groove, said retainer ring including at least two pressing sections and at least one engaging section, with said at least two pressing sections separated by said at least one engaging section, wherein both of said at least two pressing sections simultaneously press against a bottom wall defining said annular groove of said second object and are located outside of the retaining groove, with said at least two pressing sections holding said at least one engaging section away from the bottom wall defining said annular groove, wherein said at least one engaging section is exposed to at least one of said corners of said receiving compartment by being held by said at least two pressing sections simultaneously pressing against the annular groove such that said at least one engaging section has at least a portion engaged in said retaining groove when said end of said first object is received in said receiving compartment.
2. The combination as claimed in claim 1, wherein said retainer ring includes two distal ends spaced by an opening, each of said distal ends of said retainer forming an associated one of said at least two pressing sections.
3. The combination as claimed in claim 2, wherein one of said at least two pressing sections is opposite to said opening.
4. The combination as claimed in claim 3, wherein said first object is a bit and said second object is a shank of a screwdriver.
5. The combination as claimed in claim 4, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
6. The combination as claimed in claim 3, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
7. The combination as claimed in claim 2, wherein said first object is a bit and said second object is a shank of a screwdriver.
8. The combination as claimed in claim 7, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
9. The combination as claimed in claim 2, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
10. The combination as claimed in claim 1, wherein said retainer ring includes an opening and wherein one of said at least one engaging section of said retainer ring is opposite to said opening.
11. The combination as claimed in claim 10, wherein said first object is a bit and said second object is a shank of a screwdriver.
12. The combination as claimed in claim 11, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
13. The combination as claimed in claim 10, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
14. The combination as claimed in claim 1, wherein one of said at least two pressing sections is longer than another of said at least two pressing sections.
15. The combination as claimed in claim 14, wherein said first object is a bit and said second object is a shank of a screwdriver.
16. The combination as claimed in claim 14, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
17. The combination as claimed in claim 1, wherein said retainer ring includes a plurality of alternately disposed pressing sections and engaging sections.
18. The combination as claimed in claim 1, wherein said first object is a bit and said second object is a shank of a screwdriver.
19. The combination as claimed in claim 1, wherein said receiving compartment is hexagonal and said end of said first object is hexagonal.
20. The combination as claimed in claim 19, wherein said first object is a bit and said second object is a shank of a screwdriver.
21. A combination comprising:
an object including a receiving compartment adapted for removably receiving another object, said receiving compartment having a plurality of corners, an annular groove being defined in an inner periphery defining said receiving compartment; and
a resilient retainer ring received in the annular groove, said retainer ring including at least two pressing sections and at least one engaging section, with said at least two pressing sections separated by said at least one engaging section, wherein both of said at least two pressing sections simultaneously press against a bottom wall defining said annular groove of said object, with said at least two pressing sections holding said at least one engaging section away from the bottom wall defining said annular groove, wherein said at least one engaging section is exposed to at least one of said corners of said receiving compartment by being held by said at least two pressing sections simultaneously pressing against the bottom wall defining said annular groove such that said at least one engaging section has at least a portion engaged with said another object when said another object is received in said receiving compartment.
22. The combination as claimed in claim 21, wherein said retainer ring includes two distal ends spaced by an opening, each of said distal ends of said retainer forming an associated one of said at least two pressing sections.
23. The combination as claimed in claim 22, wherein one of said at least two pressing sections is opposite to said opening.
24. The combination as claimed in claim 21, wherein said retainer ring includes an opening and wherein one of said at least one engaging section of said retainer ring is opposite to said opening.
25. The combination as claimed in claim 21, wherein one of said at least two pressing sections is longer than another of said at least two pressing sections.
26. The combination as claimed in claim 21, wherein said retainer ring includes a plurality of alternately disposed pressing sections and engaging sections.
27. The combination as claimed in claim 21, wherein said another object is a bit and said object is a shank of a screwdriver.
28. The combination as claimed in claim 21, wherein said receiving compartment is hexagonal and said another object is hexagonal.
US11/366,985 2001-11-28 2006-03-02 Retainer ring for securely retaining a first object to a second object Expired - Lifetime USRE41260E1 (en)

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TW090220749U TW509129U (en) 2001-11-28 2001-11-28 Fastening device for tool
US10/102,658 US6698320B2 (en) 2001-11-28 2002-03-21 Retainer ring for securely retaining a first object to a second object
US11/366,985 USRE41260E1 (en) 2001-11-28 2006-03-02 Retainer ring for securely retaining a first object to a second object

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US6869366B2 (en) * 2002-12-19 2005-03-22 Easco Hand Tools Inc. Universal joint
US20060130621A1 (en) * 2004-11-22 2006-06-22 Irwin Industrial Tool Company Multi-tool screwdriver
US7159493B1 (en) * 2005-11-30 2007-01-09 Daniel Huang Driving bit linking device in a box wrench
US20070245858A1 (en) * 2006-04-24 2007-10-25 Bobby Hu Retainer ring for wrench with box end
US10772705B2 (en) * 2018-08-22 2020-09-15 Charles Buist, DMD, PA Hand operated dental instrument
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Publication number Priority date Publication date Assignee Title
US20090297296A1 (en) * 2008-05-30 2009-12-03 Hannspree, Inc. Fastening Component, Fastening Unit, and Device Having the Fastening Unit

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Publication number Publication date
TW509129U (en) 2002-11-01
US6698320B2 (en) 2004-03-02
US20030097914A1 (en) 2003-05-29

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