US4224786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand tool with readily detachable handle
Assignee: Individual
•
Filing: 1977-09-09
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Granted: 1980-09-30
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Expires: 1997-09-09
Abstract
Abstract The hand tool in the exemplary situation constitutes a plastic rake head and a readily removable wooden handle. To assure retention of the handle, a chordal groove or transverse notch is provided near one end thereof, and the sleeve or socket portion of the rake into which the end of the handle is inserted is provided with a latch mechanism which includes a resilient tongue on the free end of which is carried a dog biased into the groove or notch through an opening in the sleeve so as to releasably latch the handle to the rake head. To prevent twisting of the handle, the bore of the sleeve is formed with a longitudinal key and a keyway is formed in the end portion of the wooden handle. The bore or socket curves inwardly at two angularly spaced locations, one to either side of the longitudinal key, to form resilient ribs having sawtooth splines thereon engageable with the inserted end portion of the handle, there being a slit near one end of such rib so that the ribs can more readily be flexed outwardly to firmly hold handles of somewhat differing diameters, assisted by flat surface ribs located diametrically opposite the ribs with the splines thereon. Various tools of different sizes and types can be substituted one for the other; yet, only a single handle is required.
Inventors
- 👤 Howard Langlie
- 👤 Albert T. Berg, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:55
CPC Classifications
B; B25; B25G; B25G3/00; B25G3/02; B25G3/12; B25G3/18; A; A01; A01D; A01D7/00; F; F16; F16B; F16B2200/00; F16B2200/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
101 words
In combination with a hand tool, means forming a generally cylindrical socket connected to said tool, said means having an opening at one end for permitting the insertion of a generally cylindrical end portion of an elongated handle into said socket and a plurality of resilient sawtooth splines integral with said means, said sawtooth splines projecting into said socket for flexibly and releasably engaging a segmental surface of the cylindrical end portion of a handle, said socket means including at least one inwardly curving resilient longitudinal rib extending into said socket and said plurality of sawtooth splines being on said rib.
Claim 2
Dependent Claim
101 words
In combination with a hand tool, means forming a generally cylindrical socket connected to said tool, said means having an opening at one end for permitting the insertion of a generally cylindrical end portion of an elongated handle into said socket and a plurality of resilient sawtooth splines integral with said means, said sawtooth splines projecting into said socket for flexibly and releasably engaging a segmental surface of the cylindrical end portion of a handle, said socket means including at least one inwardly curving resilient longitudinal rib extending into said socket and said plurality of sawtooth splines being on said rib.
Claim 3
Dependent Claim
36 words
The combination of claim 1 including a second inwardly curving resilient longitudinal rib extending into said socket, said second rib also having a plurality of sawtooth splines thereon and being angularly spaced from said first rib.
Claim 4
Dependent Claim
24 words
The combination of claim 1 including additional longitudinal ribs extending into said socket from opposite angularly spaced locations from said first and second ribs.
Claim 5
Dependent Claim
16 words
The combination of claim 3 including a longitudinal key disposed between said first and second ribs.
Claim 6
Dependent Claim
18 words
The combination of claim 4 including an elongated handle having a longitudinal keyway therein for receiving said key.
Claim 7
Dependent Claim
36 words
The combination of claim 1 in which said angularly spaced ribs have slits extending angularly with respect to the longitudinal axes thereof, said slits being located near the ends of said ribs remote from said opening.
Claim 8
Dependent Claim
28 words
The combination of claim 6 including a longitudinal key opposite said second opening and in which said angularly spaced ribs are nearer said key than said second opening.
Claim 9
Dependent Claim
40 words
The combination of claim 7 including additional longitudinal ribs extending into said socket from locations nearer said second opening and opposite said angularly spaced ribs, said additional ribs having flat surfaces facing the sawtooth splines on said angularly spaced ribs.
Claim 10
Dependent Claim
20 words
The combination of claim 6 in which said first and second ribs have inclined surfaces or ramps adjacent said opening.
Claim 11
Dependent Claim
159 words
In combination with a hand tool, plastic means connected to said tool including a sleeve forming a generally cylindrical socket having an opening at one end for permitting the insertion of a generally cylindrical end portion of an elongated wooden handle into said socket having substantially the same cross section as said socket, said plastic means having a pair of angularly spaced longitudinal ribs formed with an arcuate cross section curving inwardly into said socket from a location near said opening and said longitudinal ribs each having a plurality of sawtooth splines integrally formed thereon, said angularly spaced ribs having slits extending angularly with respect to the longitudinal axes thereof located near the ends of said ribs remote from said opening, said slits rendering said ribs and said sawtooth splines flexible and resilient so that said sawtooth splines and said ribs will flex outwardly when said generally cylindrical end portion of said elongated handle is inserted into said socket.
Claim 12
Dependent Claim
159 words
In combination with a hand tool, plastic means connected to said tool including a sleeve forming a generally cylindrical socket having an opening at one end for permitting the insertion of a generally cylindrical end portion of an elongated wooden handle into said socket having substantially the same cross section as said socket, said plastic means having a pair of angularly spaced longitudinal ribs formed with an arcuate cross section curving inwardly into said socket from a location near said opening and said longitudinal ribs each having a plurality of sawtooth splines integrally formed thereon, said angularly spaced ribs having slits extending angularly with respect to the longitudinal axes thereof located near the ends of said ribs remote from said opening, said slits rendering said ribs and said sawtooth splines flexible and resilient so that said sawtooth splines and said ribs will flex outwardly when said generally cylindrical end portion of said elongated handle is inserted into said socket.
Claim 13
Dependent Claim
211 words
In combination with a hand tool, an elongated wooden handle having a generally cylindrical end portion, means forming a generally cylindrical socket connected to said tool, said socket means having an opening at one end through which said generally cylindrical end portion of said elongated handle is received into said socket and a plurality of resilient sawtooth splines integral with said means, said sawtooth splines projecting into said socket for flexibly and releasably engaging a segmental surface of the cylindrical end portion of said wooden handle, said socket means having a second opening angularly spaced from said resilient sawtooth splines which is elongated and extends axially with respect to said socket and said splines, and latch means including a resilient tongue attached at one end to said socket means and a dog carried at the other end of said tongue extending into said socket via said second opening, said one end of said tongue being attached to said socket means adjacent the end of said second opening which is nearer said first opening, said socket means and said latch means being of one-piece plastic construction, and said cylindrical end portion of said handle having a transverse notch into which said dog extends to retain said handle end portion within said socket.
Claim 14
Dependent Claim
211 words
In combination with a hand tool, an elongated wooden handle having a generally cylindrical end portion, means forming a generally cylindrical socket connected to said tool, said socket means having an opening at one end through which said generally cylindrical end portion of said elongated handle is received into said socket and a plurality of resilient sawtooth splines integral with said means, said sawtooth splines projecting into said socket for flexibly and releasably engaging a segmental surface of the cylindrical end portion of said wooden handle, said socket means having a second opening angularly spaced from said resilient sawtooth splines which is elongated and extends axially with respect to said socket and said splines, and latch means including a resilient tongue attached at one end to said socket means and a dog carried at the other end of said tongue extending into said socket via said second opening, said one end of said tongue being attached to said socket means adjacent the end of said second opening which is nearer said first opening, said socket means and said latch means being of one-piece plastic construction, and said cylindrical end portion of said handle having a transverse notch into which said dog extends to retain said handle end portion within said socket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |