US3736992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control collar and bearing support for power tool shaft
Assignee: Black and Decker Corp
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Filing: 1971-07-14
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Granted: 1973-06-05
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Expires: 1991-07-14
Abstract
Abstract A portable electric tool having a motor supported within a housing and adapted to rotate an output shaft. A toothed, hammer member is fixed to the output shaft and, when engaged with a stationary toothed member, imparts longitudinal impact blows to the output shaft during rotation thereof. An adjustable collar supports the shaft in the tool housing and is operable, in one position of adjustment, to allow the toothed members to engage, and in another adjusted position, to prevent the toothed members from engaging. The collar embodies a novel, simplified construction and is frictionally retained in position during use of the tool. In addition, a novel bearing arrangement is provided between the collar and the shaft to insure proper lubrication of the shaft during use of the tool.
Inventors
- 👤 R Zander
- 👤 E Ostwald
- 👤 D Sides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
B; B25; B25D; B25D16/00; B25D16/006; B25D2211/00; B25D2211/06; B25D2211/062; B25D2211/064; B25D2211/067
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A hammer drill comprising a housing having an electric motor therein, an output shaft rotatably and reciprocably disposed within said housing and extending outwardly thereof and rotatably driven by said motor, cooperable means secured to said shaft and said housing, respectively, and engageable to impart longitudinal reciprocation to said shaft during rotation thereof, a collar adjustably supported upon said housing and movable from a first position, where said cooperable means is prevented from engagement, to a second position where said cooperative means is engageable upon application of axial force to said shaft, said collar comprising a one-piece member threadedly received in said housing and having an external flange for manually turning said collar.
Claim 2
Dependent Claim
113 words
A hammer drill comprising a housing having an electric motor therein, an output shaft rotatably and reciprocably disposed within said housing and extending outwardly thereof and rotatably driven by said motor, cooperable means secured to said shaft and said housing, respectively, and engageable to impart longitudinal reciprocation to said shaft during rotation thereof, a collar adjustably supported upon said housing and movable from a first position, where said cooperable means is prevented from engagement, to a second position where said cooperative means is engageable upon application of axial force to said shaft, said collar comprising a one-piece member threadedly received in said housing and having an external flange for manually turning said collar.
Claim 3
Dependent Claim
30 words
A device as defined in claim 1 wherein said collar has a smooth cylindrical portion received in said housing, and compressible friction means on said housing engaging said cylindrical portion.
Claim 4
Dependent Claim
53 words
A device as defined in claim 1 wherein said shaft has shoulder means cooperatively engageable with shoulder means on said collar, resilient means normally separating said cooperable means, said shoulder means being engageable before engagement of said cooperable means upon axial movement of said shaft when said collar is in said first position.
Claim 5
Dependent Claim
32 words
A device as defined in claim 1 wherein said shaft extends through said collar, and axially spaced bearings in said collar and defining a lubricant reservoir with said collar and said shaft.
Claim 6
Dependent Claim
82 words
A portable, electric tool including a housing having a motor supported therein, an output shaft extending outwardly of said housing and rotatably driven by said motor, means within said housing for imparting longitudinal reciprocation to said shaft, said supporting means from said shaft comprising a collar having a through bore, first and second axially spaced bearings disposed within said bore, said bearings receiving and supporting said shaft, said spaced bearings, said collar, and said shaft defining a lubricant reservoir for said shaft.
Claim 7
Dependent Claim
82 words
A portable, electric tool including a housing having a motor supported therein, an output shaft extending outwardly of said housing and rotatably driven by said motor, means within said housing for imparting longitudinal reciprocation to said shaft, said supporting means from said shaft comprising a collar having a through bore, first and second axially spaced bearings disposed within said bore, said bearings receiving and supporting said shaft, said spaced bearings, said collar, and said shaft defining a lubricant reservoir for said shaft.
Claim 8
Dependent Claim
106 words
An assembly including a control collar and bearing support for a rotating and selectively reciprocating shaft, said assembly comprising a collar threadedly received within a housing, compressible means confined by one and directly frictionally engaging the other of said housing and said collar at a smooth surface thereof, first and second bearings supported within said collar and supportably receiving said rotating and selectively reciprocating shaft, said bearings being axially spaced and forming a lubricant reservoir with said collar and said shaft, said collar havIng a radial flange externally of said housing and adapted for manual grasping, whereby to adjustably thread said collar relative to said housing.
Claim 9
Dependent Claim
106 words
An assembly including a control collar and bearing support for a rotating and selectively reciprocating shaft, said assembly comprising a collar threadedly received within a housing, compressible means confined by one and directly frictionally engaging the other of said housing and said collar at a smooth surface thereof, first and second bearings supported within said collar and supportably receiving said rotating and selectively reciprocating shaft, said bearings being axially spaced and forming a lubricant reservoir with said collar and said shaft, said collar havIng a radial flange externally of said housing and adapted for manual grasping, whereby to adjustably thread said collar relative to said housing.
Claim 10
Dependent Claim
32 words
An assembly as defined in claim 6 wherein said compressible means includes a resilient pellet carried in a recess in said housing and directly engaging a smooth annular surface on said collar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |