Patent US3685594A successfully refreshed from Google Patents.
US3685594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary hammer or the like
Assignee: Rockwell Manufacturing Co
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Filing: 1970-08-03
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Granted: 1972-08-22
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Expires: 1990-08-03
Abstract
Abstract A rotary hammer or the like including a holder for a tool, a power source, and a drive train through which rotary motion of the power source is transmitted to the tool holder. The hammer also includes mechanism which is operable to impart periodic axial impacts to a tool in the holder, when desired, and mechanism for disabling the impact imparting mechanism so that rotary motion only is applied to the tool.
Inventors
- 👤 Heinrich P Koehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:03
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/02; B25D11/00; B25D11/06; B25D11/10; B25D11/108; B25D16/00; B25D16/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
163 words
A rotary hammer or like device having one configuration in which it is operative to rotate and axially impact a tool and a second configuration in which only rotation is imparted to the tool, comprising a tool receiving holder; means for rotating a tool received in said holder; means for imparting axial impacts to the tool comprising a rectilinearly moveable driver, means biasing said driver toward said tool holder and an axially movable cam means mounted for rotation about an axis parallel to the axis of reciprocation of the driver and engageable therewith for retracting the driver relaTive to said tool receiving holder and then releasing said driver for movement toward said tool under the influence of said biasing means to impart an impact thereto; and means selectively adjustable to maintain said driver out of engagement with said cam means to keep axial impacts from being imparted to said holder, whereby there is rotation only of said holder and a tool secured therein.
Claim 2
Dependent Claim
163 words
A rotary hammer or like device having one configuration in which it is operative to rotate and axially impact a tool and a second configuration in which only rotation is imparted to the tool, comprising a tool receiving holder; means for rotating a tool received in said holder; means for imparting axial impacts to the tool comprising a rectilinearly moveable driver, means biasing said driver toward said tool holder and an axially movable cam means mounted for rotation about an axis parallel to the axis of reciprocation of the driver and engageable therewith for retracting the driver relaTive to said tool receiving holder and then releasing said driver for movement toward said tool under the influence of said biasing means to impart an impact thereto; and means selectively adjustable to maintain said driver out of engagement with said cam means to keep axial impacts from being imparted to said holder, whereby there is rotation only of said holder and a tool secured therein.
Claim 3
Dependent Claim
52 words
The device of claim 1, wherein said selectively adjustable means comprises a bipositional member effective in one position to lock said driver in a retracted position relative to said tool and tool receiving holder, said member being disposed out of the path of movement of said driver in the other position thereof.
Claim 4
Dependent Claim
53 words
The device of claim 2, including a casing surrounding the tool receiving holder, the means for rotating the holder and the imparting mechanism and wherein the selectively adjustable means comprises a shaft rotatably supported in and extending through said casing, said bipositional member being fixed eccentrically to the inner end of said shaft.
Claim 5
Dependent Claim
60 words
The device of claim 1, wherein the cam means is incorporated in a component having gear means formed thereon and including means for rotating the cam means which includes a motor having an output shaft, there being a second gear means on said output shaft meshing with the gear means on the component in which the cam means is incorporated.
Claim 6
Dependent Claim
40 words
The device of claim 4, wherein there are third and fourth intermeshing gear means formed on the component in which the cam means is incorporated and the tool receiving holder, respectively, thereby drive-connecting said tool receiving holder to said motor.
Claim 7
Dependent Claim
99 words
The device of claim 1, wherein the means mounting said cam means for rotation comprises a rotatable shaft about which said cam means is free to rotate and including means for rotating said cam means which comprises a gear means fixed to said shaft for rotation therewith; a motor having an output shaft; a second gear means on said shaft meshing with the first-mentioned gear means; and cooperating, engageable drive elements on said first-mentioned gear means and said cam means, whereby said cam means is drive-connected to said motor for rotation thereby when said cooperating drive elements are engaged.
Claim 8
Dependent Claim
32 words
The device of claim 6, together with means biasing said drive elements out of engagement and means for maintaining said elements in driving engagement despite the force exerted by said biasing means.
Claim 9
Dependent Claim
79 words
The device of claim 1, wherein the means mounting said cam means is a rotatably mounted shaft to which the cam means is rotatably fixed and including means for rotating the cam means which includes a motor having an output shaft disposed with its axis of rotation at right angles to the axis of rotation of the cam means mounting shaft, there being meshing bevel gear means on said motor output shaft and on said cam means mounting shaft.
Claim 10
Dependent Claim
93 words
A rotary hammer or like device comprising a tool receiving holder; means for rotating said holder and thereby rotating a tool received therein; and means for imparting axial impacts to said tool including an axially immovable, cylindrical bearing, an impact imparting driver slidable in and supported solely by said bearing and having a recess in the end thereof facing the tool holder into which said holder can extend, and means for alternately retracting said driver out of and moving it into engagement with said tool receiving holder to produce an axial impact thereon.
Claim 11
Dependent Claim
93 words
A rotary hammer or like device comprising a tool receiving holder; means for rotating said holder and thereby rotating a tool received therein; and means for imparting axial impacts to said tool including an axially immovable, cylindrical bearing, an impact imparting driver slidable in and supported solely by said bearing and having a recess in the end thereof facing the tool holder into which said holder can extend, and means for alternately retracting said driver out of and moving it into engagement with said tool receiving holder to produce an axial impact thereon.
Claim 12
Dependent Claim
55 words
The device of claim 9, including a casing surrounding said tool receiving holder, the means for rotating the holder, and the driver retracting means; a support for the drive supporting bearing formed in said casing; and a compression spring disposed between said casing and said driver to bias said driver toward said tool receiving holder.
Claim 13
Dependent Claim
141 words
A rotary hammer or like device, comprising a tool receiving holder; a tool received in said holder for rotation therewith; means for rotating said holder and thereby said tooL; a driver mounted for rectilinear movement in a path extending in the same direction as the longitudinal axis of said tool, said driver being positioned to impart axial impacts to said tool upon movement toward said holder and said tool; an axially fixed, rotatable cam means disposed to one side of said driver and said tool holder which is engageable with the end of the driver nearest the tool and tool receiving holder for alternately displacing said driver away from said holder and releasing said driver for movement toward said tool and said tool receiving holder under the influence of said biasing means as it rotates; and means for rotating said cam.
Claim 14
Dependent Claim
141 words
A rotary hammer or like device, comprising a tool receiving holder; a tool received in said holder for rotation therewith; means for rotating said holder and thereby said tooL; a driver mounted for rectilinear movement in a path extending in the same direction as the longitudinal axis of said tool, said driver being positioned to impart axial impacts to said tool upon movement toward said holder and said tool; an axially fixed, rotatable cam means disposed to one side of said driver and said tool holder which is engageable with the end of the driver nearest the tool and tool receiving holder for alternately displacing said driver away from said holder and releasing said driver for movement toward said tool and said tool receiving holder under the influence of said biasing means as it rotates; and means for rotating said cam.
Claim 15
Dependent Claim
146 words
A rotary hammer or like device, comprising a tool receiving holder; means for rotating said holder to thereby impart rotary movement to a tool received in said holder; and means for imparting axial impacts to the tool including a rectilinearly movable driver, resilient means biasing said driver toward said holder, a cam means and means mounting said cam means for rotation about an axis parallel to the axis of rotation of said driver for retracting said driver relative to said tool receiving holder and then releasing said driver for movement toward said tool holder under the influence of said biasing means; and means for rotating said cam means which includes a motor having a rotatable output shaft disposed with its axis of rotation at right angles to the axis of rotation of the cam means and means drive-connecting said motor output shaft to said cam means.
Claim 16
Dependent Claim
146 words
A rotary hammer or like device, comprising a tool receiving holder; means for rotating said holder to thereby impart rotary movement to a tool received in said holder; and means for imparting axial impacts to the tool including a rectilinearly movable driver, resilient means biasing said driver toward said holder, a cam means and means mounting said cam means for rotation about an axis parallel to the axis of rotation of said driver for retracting said driver relative to said tool receiving holder and then releasing said driver for movement toward said tool holder under the influence of said biasing means; and means for rotating said cam means which includes a motor having a rotatable output shaft disposed with its axis of rotation at right angles to the axis of rotation of the cam means and means drive-connecting said motor output shaft to said cam means.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |