US4209182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bit retainer for screwdriver
Assignee: Cooper Technologies Co
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Filing: 1978-10-05
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Granted: 1980-06-24
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Expires: 1998-10-05
Abstract
Abstract An axially movable sleeve is retained in a bore in the nose portion of a portable rotary tool housing. The sleeve is disposed around a spindle and holds captive a ball key disposed in the spindle which releasably retains a screw driver bit or the like in the spindle bore or socket. The sleeve is releasably retained in the housing bore by a spring retainer whereby the bit as well as the retainer sleeve may be quickly removed and replaced by axial displacement of the sleeve.
Inventors
- 👤 Gordon P. Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/107; B23B31/1071; B25; B25B; B25B23/00; B25B23/0007; B25B23/0035; B25F; B25F3/00; Y; Y10; Y10S; Y10S279/00; Y10S279/904; Y10S279/905; Y10T; Y10T279/00; Y10T279/17; Y10T279/17128; Y10T279/17171; Y10T279/17188; Y10T279/17196; Y10T279/17666; Y10T279/17692; Y10T279/17743; Y10T279/17752
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
240 words
In a portable power tool in combination: a housing including a nose portion having an axial bore opening to one end thereof; a rotary spindle disposed in said bore and forming an annular space between the cylindrical wall of said nose portion forming said bore and said spindle, said spindle including a socket for receiving the shank of a bit or the like; a bit retaining key disposed on said spindle and operable to be in a position projecting into said socket for retaining a bit therein, said bit retaining key being operable to be displaced from said socket into said annular space to release a bit from said spindle; an elongated tubular sleeve removably disposed in said bore in close fitting relationship to said cylindrical wall and being operable to occupy at least a portion of said annular space so as to prevent said bit retaining key from being displaced from said socket; a sleeve retaining key disposed on said nose portion and projecting into said bore for releasably retaining said sleeve in said bore, said sleeve retaining key being biased into engagement with said sleeve by spring means disposed on said nose portion; and, means associated with said sleeve and projecting from said bore at said one end of said nose portion for moving said sleeve axially to allow said bit retaining key to be displaced into said annular space to release a bit disposed in said socket.
Claim 2
Dependent Claim
240 words
In a portable power tool in combination: a housing including a nose portion having an axial bore opening to one end thereof; a rotary spindle disposed in said bore and forming an annular space between the cylindrical wall of said nose portion forming said bore and said spindle, said spindle including a socket for receiving the shank of a bit or the like; a bit retaining key disposed on said spindle and operable to be in a position projecting into said socket for retaining a bit therein, said bit retaining key being operable to be displaced from said socket into said annular space to release a bit from said spindle; an elongated tubular sleeve removably disposed in said bore in close fitting relationship to said cylindrical wall and being operable to occupy at least a portion of said annular space so as to prevent said bit retaining key from being displaced from said socket; a sleeve retaining key disposed on said nose portion and projecting into said bore for releasably retaining said sleeve in said bore, said sleeve retaining key being biased into engagement with said sleeve by spring means disposed on said nose portion; and, means associated with said sleeve and projecting from said bore at said one end of said nose portion for moving said sleeve axially to allow said bit retaining key to be displaced into said annular space to release a bit disposed in said socket.
Claim 3
Dependent Claim
52 words
The invention set forth in claim 1 wherein: said sleeve includes a first recess in the cylindrical outer wall surface thereof in which said sleeve retaining key may be disposed to hold said sleeve in a position in said bore which will prevent displacement of said bit retaining key from said socket.
Claim 4
Dependent Claim
60 words
The invention set forth in claim 2 wherein: said sleeve includes a second recess adjacent to said first recess and including a shoulder engageable with said sleeve retaining key whereby said sleeve may be moved axially in said bore to engage said sleeve retaining key with said shoulder to allow said bit retaining key to be displaced from said socket.
Claim 5
Dependent Claim
247 words
In a portable power tool in combination: a housing including a nose portion having an axial bore opening to one end thereof; a rotary spindle disposed in said bore and forming an annular space between the cylindrical wall of said nose portion forming said bore and said spindle, said spindle including a socket for receiving the shank of a bit or the like; a bit retaining key disposed on said spindle and operable to be in a position projecting into said socket for retaining a bit therein, said bit retaining key being operable to be displaced from said socket into said annular space to release a bit from said spindle; an elongated tubular sleeve removably disposed in said bore in close fitting relationship to said cylindrical wall and being operable to occupy at least a portion of said annular space so as to prevent said bit retaining key from being displaced from said socket; a sleeve retaining key disposed on said nose portion and projecting into said bore for releasably retaining said sleeve in said bore, said sleeve retaining key being biased into engagement with said sleeve by spring means disposed on said nose portion; and, means including an integral collar disposed on one end of said sleeve and projecting from said bore at said one end of said nose portion for moving said sleeve axially to allow said bit retaining key to be displaced into said annular space to release a bit disposed in said socket.
Claim 6
Dependent Claim
247 words
In a portable power tool in combination: a housing including a nose portion having an axial bore opening to one end thereof; a rotary spindle disposed in said bore and forming an annular space between the cylindrical wall of said nose portion forming said bore and said spindle, said spindle including a socket for receiving the shank of a bit or the like; a bit retaining key disposed on said spindle and operable to be in a position projecting into said socket for retaining a bit therein, said bit retaining key being operable to be displaced from said socket into said annular space to release a bit from said spindle; an elongated tubular sleeve removably disposed in said bore in close fitting relationship to said cylindrical wall and being operable to occupy at least a portion of said annular space so as to prevent said bit retaining key from being displaced from said socket; a sleeve retaining key disposed on said nose portion and projecting into said bore for releasably retaining said sleeve in said bore, said sleeve retaining key being biased into engagement with said sleeve by spring means disposed on said nose portion; and, means including an integral collar disposed on one end of said sleeve and projecting from said bore at said one end of said nose portion for moving said sleeve axially to allow said bit retaining key to be displaced into said annular space to release a bit disposed in said socket.
Claim 7
Dependent Claim
226 words
In a portable power tool in combination: a housing including a nose portion having an axial bore opening to one end thereof; a rotary spindle disposed in said bore and forming an annular space between the cylindrical wall of said nose portion forming said bore and said spindle, said spindle including a socket for receiving the shank of a bit or the like; a bit retaining key disposed on said spindle and operable to be in a position projecting into said socket for retaining a bit therein, said bit retaining key being operable to be displaced from said socket into said annular space to release a bit from said spindle; an elongated tubular sleeve removably disposed in said bore in close fitting relationship to said cylindrical wall and being operable to occupy at least a portion of said annular space so as to prevent said bit retaining key from being displaced from said socket; a sleeve retaining key disposed on said nose portion and adapted to be resiliently biased into engagement with said sleeve for retaining said sleeve in said bore; and, means associated with said sleeve and projecting from said bore at said one end of said nose portion for moving said sleeve axially to allow said bit retaining key to be displaced into said annular space to release a bit disposed in said socket.
Claim 8
Dependent Claim
226 words
In a portable power tool in combination: a housing including a nose portion having an axial bore opening to one end thereof; a rotary spindle disposed in said bore and forming an annular space between the cylindrical wall of said nose portion forming said bore and said spindle, said spindle including a socket for receiving the shank of a bit or the like; a bit retaining key disposed on said spindle and operable to be in a position projecting into said socket for retaining a bit therein, said bit retaining key being operable to be displaced from said socket into said annular space to release a bit from said spindle; an elongated tubular sleeve removably disposed in said bore in close fitting relationship to said cylindrical wall and being operable to occupy at least a portion of said annular space so as to prevent said bit retaining key from being displaced from said socket; a sleeve retaining key disposed on said nose portion and adapted to be resiliently biased into engagement with said sleeve for retaining said sleeve in said bore; and, means associated with said sleeve and projecting from said bore at said one end of said nose portion for moving said sleeve axially to allow said bit retaining key to be displaced into said annular space to release a bit disposed in said socket.
Claim 9
Dependent Claim
29 words
The invention set forth in claim 5 wherein: said means associated with said sleeve includes an integral collar disposed on the end of said sleeve projecting from said bore.
Claim 10
Dependent Claim
49 words
The invention set forth in claim 5 wherein: said bit retaining key is a spherical member, and the width of said annular space is less than the diameter of said spherical member whereby said spherical member is prevented from being displaced radially outwardly out of engagement with said spindle.
References Cited (Backward Citations)
US2010210A
Cited
US2008894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |