US3848488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multispindle hand screwing device or brace
Assignee: Individual
•
Filing: 1974-01-04
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Granted: 1974-11-19
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Expires: 1994-01-04
Abstract
Abstract A multispindle hand screwing device or brace, in particular for tightening and unscrewing the wheel screw fastenings of motor vehicles, has a drive motor which drives via a transmission unit a plurality of screw spindles provided at their free ends with a screwing implement and with the interposition in each case of a claw or dog coupling which automatically disengages at a predetermined torque. Each screw spindle comprises a universal joint shaft having two joints, and the spindle end provided with the screwing implement is guided parallel in each case by a radially movable slide member which can be moved by a drive unit common to all the slide members.
Inventors
- 👤 A Weisenburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:19
CPC Classifications
B; B25; B25B; B25B21/00; B25B21/002
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
A multispindle hand screwing device or brace, in particular for tightening and unscrewing the wheel screw fastenings of motor vehicles, having a drive motor which drives via a transmission unit a plurality of screw spindles provided at their free ends with a screwing implement and with the interposition in each case of a claw or dog coupling which automatically disengages at a predetermined torque, each screw spindle comprising a universal joint shaft having two joints, and the spindle end provided with the screwing implement being guided parallel in each case by a radially movable slide member which can be moved by a drive unit common to all the slide members.
Claim 2
Dependent Claim
110 words
A multispindle hand screwing device or brace, in particular for tightening and unscrewing the wheel screw fastenings of motor vehicles, having a drive motor which drives via a transmission unit a plurality of screw spindles provided at their free ends with a screwing implement and with the interposition in each case of a claw or dog coupling which automatically disengages at a predetermined torque, each screw spindle comprising a universal joint shaft having two joints, and the spindle end provided with the screwing implement being guided parallel in each case by a radially movable slide member which can be moved by a drive unit common to all the slide members.
Claim 3
Dependent Claim
28 words
A hand brace according to claim 1, wherein each slide member is provided with a rack which meshes with a central pinion common to all the slide members.
Claim 4
Dependent Claim
22 words
A hand brace according to claim 2, wherein the individual slide members are distributed consecutively along the axial length of the pinion.
Claim 5
Dependent Claim
46 words
A hand brace according to claim 2 wherein, for the purposes of adjustment, the central pinion is connected to a crown wheel which meshes with a bevel pinion which can be turned by a handwheel arranged on the exterior of the transmission housing of the brace.
Claim 6
Dependent Claim
15 words
A hand brace according to claim 4, wherein the handwheel can be locked in position.
Claim 7
Dependent Claim
22 words
A hand brace according to claim 2, wherein each slide member has an elongated slot one of those edges carries the rack.
Claim 8
Dependent Claim
36 words
A hand brace according to claim 1, wherein the slide members are guided near the end face of the transmission housing and have arms which at their free ends carry guide bushes for the spindle ends.
Claim 9
Dependent Claim
41 words
A hand brace according to claim 7, wherein each slide member has two adjacent arms which are connected to the respective guide bush for the spindle end and leave between one another space for the free passage of the screw spindle.
Claim 10
Dependent Claim
34 words
A hand brace according to claim 1, wherein at least one of the slide membeRs is provided at its end with a pointer or scale for indicating the radial setting of the screw spindles.
Claim 11
Dependent Claim
28 words
A hand brace according to claim 1, wherein one claw coupling half is mounted in the transmission housing and takes the form of part of a spindle joint.
Claim 12
Dependent Claim
54 words
A hand brace according to claim 10, wherein in each case the other claw coupling half is spring-loaded for axial movement and for rotation is positively driven by a gear wheel which in each case forms a planet pinion of the transmission unit and meshes with a central gear wheel mounted for free rotation.
Claim 13
Dependent Claim
18 words
A hand brace according to claim 11, wherein the central gear wheel is provided with a flywheel mass.
Claim 14
Dependent Claim
17 words
A hand brace according to claim 11, wherein the planet pinions are provided with a flywheel mass.
Claim 15
Dependent Claim
57 words
A hand brace according to claim 11, wherein the central gear wheel is arranged for free rotation on a shaft of the drive motor, the shaft projecting into the transmission housing and being connected with a drive gear wheel which is in driving connection with one of the planet pinions via gear wheels on an intermediate shaft.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |