Patent US3693728A successfully refreshed from Google Patents.
US3693728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussion and rotary drilling machine
Assignee: Individual
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Filing: 1970-11-06
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Granted: 1972-09-26
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Expires: 1990-11-06
Abstract
Abstract A drilling machine has a tool holder shaft on which are mounted a spring and a blocking sleeve which abuts one or the other of two eccentric abutment faces of a manually turnable member. In a first position of the manually turnable member, the spring permits movement of the shaft due to pressure against the workpiece to a first axial position in which the shaft is axially reciprocated by suitable displacement means during rotation, and performs a percussion drilling operation. In a second position of the manually turnable member, the blocking sleeve engages the shaft directly, and blocks the same in a second axial position in which the shaft is not reciprocated but only rotated during drilling, irrespective of the pressure applied by the shaft to the workpiece.
Inventors
- 👤 Reinhold Stroezel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
B; B25; B25D; B25D16/00; B25D16/006; B25D2211/00; B25D2211/06; B25D2211/062; B25D2211/064; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
313 words
Percussion and drilling machine comprising a housing; a tool holder shaft mounted in said housing for rotation about a first axis, and for limited axial movement; first and second displacement rings secured to said housing and said shaft, respectively, and having confronting faces, each face having alternate projecting and recessed portions, said first and second faces having an engaged position in which said shaft reciprocates in axial direction for percussion drilling, and an axially spaced position in which said shaft only rotates for rotary drilling; spring means engaging said shaft for urging said shaft and first displacement ring away from said second displacement ring to said axially spaced position; blocking sleeve means mounted on the rear end of said shaft for axial movement; and manually operated means mounted on said housing for angular movement about a second axis perpendicular to, and intersecting said first axis rearward of said rear end, said manually operated means having at least first and second abutment faces spaced different radial distances from said second axis and cooperating with said blocking sleeve means so that when said first abutment face cooperates with said blocking sleeve means in a first angular position of said manually operated means, and the front end of said shaft is pressed against a workpiece, said spring means yields and said first displacement ring is pressed against said second displacement ring and said faces engage each other, whereby said shaft is axially reciprocated, and so that in said second angular position of said manually operated means said second abutment face blocks said blocking sleeve means whereby, when said front end of said shaft is pressed against the workpiece, said shaft is blocked by said blocking sleeve means and said second abutment face in an axial position in which said displacement rings remain in said axially spaced position so that said shaft performs a rotary drilling operation.
Claim 2
Dependent Claim
313 words
Percussion and drilling machine comprising a housing; a tool holder shaft mounted in said housing for rotation about a first axis, and for limited axial movement; first and second displacement rings secured to said housing and said shaft, respectively, and having confronting faces, each face having alternate projecting and recessed portions, said first and second faces having an engaged position in which said shaft reciprocates in axial direction for percussion drilling, and an axially spaced position in which said shaft only rotates for rotary drilling; spring means engaging said shaft for urging said shaft and first displacement ring away from said second displacement ring to said axially spaced position; blocking sleeve means mounted on the rear end of said shaft for axial movement; and manually operated means mounted on said housing for angular movement about a second axis perpendicular to, and intersecting said first axis rearward of said rear end, said manually operated means having at least first and second abutment faces spaced different radial distances from said second axis and cooperating with said blocking sleeve means so that when said first abutment face cooperates with said blocking sleeve means in a first angular position of said manually operated means, and the front end of said shaft is pressed against a workpiece, said spring means yields and said first displacement ring is pressed against said second displacement ring and said faces engage each other, whereby said shaft is axially reciprocated, and so that in said second angular position of said manually operated means said second abutment face blocks said blocking sleeve means whereby, when said front end of said shaft is pressed against the workpiece, said shaft is blocked by said blocking sleeve means and said second abutment face in an axial position in which said displacement rings remain in said axially spaced position so that said shaft performs a rotary drilling operation.
Claim 3
Dependent Claim
152 words
Drilling machine as claimed in claim 1, wherein said manually operated means include a third abutment face angularly spaced from said first and second abutment faces, and cooperating with said blocking sleeve means in a third angular position of said manually operated means; wherein said third abutment face is spaced from said second axis a radial distance greater than said first abutment face and smaller than said second abutment face so that in said third angular position of said manually operated means, when said front end of said shaft is pressed against said workpiece, said shaft is blocked by said blocking sleeve means and said third abutment face in an intermediate position in which said projecting and recessed portions of said faces of said displacement rings partly engage each other so that said shaft is reciprocated in a shorter percussion stroke than in said first angular position of said manually operated means.
Claim 4
Dependent Claim
245 words
Percussion and rotary drilling machine comprising a housing; a tool holder shaft mounted in said housing for rotation about first axis, and for axial movement; first and second displacement means fixedly secured to said shaft and said housing, respectively, and having an engaged position in which said shaft reciprocates during rotation for percussion drilling, and an axially spaced position in which said shaft only rotates for rotary drilling; actuating means including a blocking means movable along said shaft, and a spring having ends abutting said shaft and said blocking means, respectively; and manually operated means mounted on said housing for angular movement about a second axis and having abutment means eccentric to said second axis, said blocking means abutting said abutment means so that in a first position of said manually operated means, said shaft is held by said spring in a first axial position in which said first displacement means is spaced from said second displacement means until said shaft is pressed against a workpiece and said spring yields whereby said first and second displacement means engage each other and said shaft is axially reciprocated, and so that in a second position of said manually operated means and abutment means, said blocking means engages said shaft and blocks said shaft and said first displacement means in a second axial position in which said first and second displacement means remain spaced when pressed against a workpiece so that said shaft performs a rotary drilling operation.
Claim 5
Dependent Claim
245 words
Percussion and rotary drilling machine comprising a housing; a tool holder shaft mounted in said housing for rotation about first axis, and for axial movement; first and second displacement means fixedly secured to said shaft and said housing, respectively, and having an engaged position in which said shaft reciprocates during rotation for percussion drilling, and an axially spaced position in which said shaft only rotates for rotary drilling; actuating means including a blocking means movable along said shaft, and a spring having ends abutting said shaft and said blocking means, respectively; and manually operated means mounted on said housing for angular movement about a second axis and having abutment means eccentric to said second axis, said blocking means abutting said abutment means so that in a first position of said manually operated means, said shaft is held by said spring in a first axial position in which said first displacement means is spaced from said second displacement means until said shaft is pressed against a workpiece and said spring yields whereby said first and second displacement means engage each other and said shaft is axially reciprocated, and so that in a second position of said manually operated means and abutment means, said blocking means engages said shaft and blocks said shaft and said first displacement means in a second axial position in which said first and second displacement means remain spaced when pressed against a workpiece so that said shaft performs a rotary drilling operation.
Claim 6
Dependent Claim
32 words
Drilling machine as claimed in claim 1 wherein said abutment means includes two abutment faces angularly spaced at least 90* about said second axis and having different distances from said second axis.
Claim 7
Dependent Claim
63 words
Drilling machine as claimed in claim 4 wherein said second axis intersects said axis of said shaft; wherein said blocking means abuts one of said abutment faces in said first position of said manually operated means due to the action of said spring; and wherein said shaft has an abutment engaged by said blocking means when the same engages the other abutment face.
Claim 8
Dependent Claim
52 words
Drilling machine as claimed in claim 4 wherein said blocking means includes a bearing sleeve having one end abutting said abutment means, and a thrust ball bearing mounted on said shaft for axial movement and abutting the other end of said bearing sleeve, and wherein said spring abuts said thrust ball bearing.
Claim 9
Dependent Claim
55 words
Drilling machine as claimed in claim 6 wherein said shaft has a small shaft portion surrounded by said thrust ball bearing, and an adjacent larger portion surrounded by said spring and forming an annular shoulder with said small shaft portion against which said ball bearing abuts in said second position of said manually operated means.
Claim 10
Dependent Claim
69 words
Drilling machine as claimed in claim 3 wherein said abutment means include a first abutment face engaged by said blocking means by the action of said spring in said first position of said manually operated means, and a second abutment face spaced a greater distance from said second axis than said first abutment face and engaged by said blocking means in said second position of said manually operated means.
Claim 11
Dependent Claim
105 words
Drilling machine as claimed in claim 8 wherein said abutment means includes a third abutment face engaged by said blocking means in a third position of said manually operated means and being spaced from said secoNd axis a distance intermediate the distances which said first and second faces are spaced from said second axis so that said blocking means blocks movement of said shaft due to pressure against a workpiece in an intermediate position in which said first and second displacement means are partly engaged so that said shaft is reciprocated in shorter percussion strokes than in said first position of said manually operated means.
Claim 12
Dependent Claim
94 words
Drilling machine as claimed in claim 9 wherein said first and second displacement means are first and second discs respectively secured to said shaft and said housing and having confronting faces, each of which has alternating axially projecting and recessed portions so that in a fully engaged position, said projecting portions said first disc completely enter the recessed portions of said second disc due to said spring, while in the partly engaged position, said projecting portions only partly enter said recesses due to said blocking means abutting said third abutment face and said shaft.
Claim 13
Dependent Claim
31 words
Drilling machine as claimed in claim 10 wherein said first disc is fixedly secured to said shaft and forms a shoulder with the same; and wherein said spring abuts said shoulder.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |