US3918533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screwdriver
Assignee: Weber Schraubautomaten GmbH
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Filing: 1974-07-10
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Granted: 1975-11-11
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Expires: 1994-07-10
Abstract
Abstract A screwdriver, comprising a screwdriver blade which can be longitudinally displaced by means of a piston moved in a pneumatic cylinder and which can be set in rotation by means of an air motor, wherein the air motor is journaled on a piston which is secured against rotation.
Inventors
- 👤 Karl-Heinz Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
B; B25; B25B; B25B21/00; B25B23/00; B25B23/02; B25B23/04; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
225 words
A screwdriver comprising a housing, a screwdriver blade rotatably and reciprocably mounted in said housing, a cylinder arranged in said housing, a piston reciprocably and non-rotatably mounted in said cylinder for reciprocating saiD blade, and an air motor journalled on said piston for selectively rotating said blade, said air motor having a front side adjacent said screwdriver blade and a rear side opposite thereto and being connected to said piston at said opposite side, said air motor having a shell spaced from said cylinder so as to leave an intermediate space therebetween and being connected to that side of said piston which faces said blade; said air motor being closed at that end thereof which faces said blade; a sleeve arranged coaxially with respect to said cylinder for guiding said air motor; an air supply conduit means including a first passage between said housing and intermediate space through said cylinder and a second passage between said intermediate space and said air motor through said shell, said air motor having first profile means at its outer circumference, first seal means at the outer circumference of said piston, a ring located between said cylinder and said sleeve, and second profile means fixedly connected to said housing in said ring and cooperating with said first profile means, for preventing relative rotation between said air motor and said housing.
Claim 2
Dependent Claim
225 words
A screwdriver comprising a housing, a screwdriver blade rotatably and reciprocably mounted in said housing, a cylinder arranged in said housing, a piston reciprocably and non-rotatably mounted in said cylinder for reciprocating saiD blade, and an air motor journalled on said piston for selectively rotating said blade, said air motor having a front side adjacent said screwdriver blade and a rear side opposite thereto and being connected to said piston at said opposite side, said air motor having a shell spaced from said cylinder so as to leave an intermediate space therebetween and being connected to that side of said piston which faces said blade; said air motor being closed at that end thereof which faces said blade; a sleeve arranged coaxially with respect to said cylinder for guiding said air motor; an air supply conduit means including a first passage between said housing and intermediate space through said cylinder and a second passage between said intermediate space and said air motor through said shell, said air motor having first profile means at its outer circumference, first seal means at the outer circumference of said piston, a ring located between said cylinder and said sleeve, and second profile means fixedly connected to said housing in said ring and cooperating with said first profile means, for preventing relative rotation between said air motor and said housing.
Claim 3
Dependent Claim
19 words
A screwdriver according to claim 1, wherein said first profile means extends over the length of said air motor.
Claim 4
Dependent Claim
146 words
A screwdriver comprising a housing, a screwdriver blade rotatably and reciprocably mounted in said housing, a cylinder arranged in said housing, a piston reciprocably and non-rotatably mounted in said cylinder for reciprocating said blade, and an air motor journalled on said piston for selectively rotating said blade, said air motor having a front side adjacent said screwdriver blade and a rear side opposite thereto and being connected to said piston at said opposite side, said air motor having first profile means at its outer circumference, first seal means at the outer circumference of said piston, a ring located at a place in said screwdriver adjacent said front face of said air motor when said piston is in its retracted position, and second profile means provided in said ring and cooperating with said first profile means, for presenting relative rotation between said air motor and said housing.
Claim 5
Dependent Claim
146 words
A screwdriver comprising a housing, a screwdriver blade rotatably and reciprocably mounted in said housing, a cylinder arranged in said housing, a piston reciprocably and non-rotatably mounted in said cylinder for reciprocating said blade, and an air motor journalled on said piston for selectively rotating said blade, said air motor having a front side adjacent said screwdriver blade and a rear side opposite thereto and being connected to said piston at said opposite side, said air motor having first profile means at its outer circumference, first seal means at the outer circumference of said piston, a ring located at a place in said screwdriver adjacent said front face of said air motor when said piston is in its retracted position, and second profile means provided in said ring and cooperating with said first profile means, for presenting relative rotation between said air motor and said housing.
Claim 6
Dependent Claim
19 words
A screwdriver according to claim 3, wherein said first profile means extends over the length of said air motor.
Claim 7
Dependent Claim
166 words
A screwdriver comprising a housing, a screwdriver blade rotatably and reciprocably mounted in said housing, a cylinder arranged in said housing, a piston reciprocably and non-rotatably mounted in said cylinder for reciprocating said blade, and an air motor journalled on said piston for selectively rotating said blade, said air motor having a front side adjacent said screwdriver blade and a rear side opposite thereto and being connected to said piston at said opposite side, said air motor having first profile means at its outer circumference, first seal means at the outer circumference of said piston, a second profile means fixedly connected to said housing and cooperating with said first profile means, for preventing relative rotation between said air motor and said housing, and guide ring means connected to said air motor adjacent its front face, second seal means on the outer circumference of said guide ring means, said guide ring means being located between said first and second seal means in every position of said motor.
Claim 8
Dependent Claim
166 words
A screwdriver comprising a housing, a screwdriver blade rotatably and reciprocably mounted in said housing, a cylinder arranged in said housing, a piston reciprocably and non-rotatably mounted in said cylinder for reciprocating said blade, and an air motor journalled on said piston for selectively rotating said blade, said air motor having a front side adjacent said screwdriver blade and a rear side opposite thereto and being connected to said piston at said opposite side, said air motor having first profile means at its outer circumference, first seal means at the outer circumference of said piston, a second profile means fixedly connected to said housing and cooperating with said first profile means, for preventing relative rotation between said air motor and said housing, and guide ring means connected to said air motor adjacent its front face, second seal means on the outer circumference of said guide ring means, said guide ring means being located between said first and second seal means in every position of said motor.
Claim 9
Dependent Claim
19 words
The screwdriver according to claim 5, wherein said first profile means extends over the length of said air motor.
References Cited (Backward Citations)
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |