US3875805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starter drive for an internal combustion engine
Assignee: DBA SA
•
Filing: 1973-11-15
•
Granted: 1975-04-08
•
Expires: 1993-11-15
Abstract
Abstract A starter for an internal combustion engine comprising a helically splined shaft adapted to be rotated by a starter motor, and a moveable portion comprising a sleeve threadedly received on the helical splines of the shaft and connected by a one way clutch to a pinion, the moveable portion being associated with the friction drive mechanism which comprises a retarding plate in frictional engagement with the sleeve and a plunger solenoid of which the plunger core, when in its operational position, operates with the plate by means of a connection of the slot and guide-rail type to prevent rotation of the plate while permitting axial motion of the plate, wherein the plunger core comprises an extension directed towards the retarding plate and cooperating with the plate by engagement means which, when the plunger is in its idle position, prevents actual motion of the plate while permitting rotation of the plate.
Inventors
- 👤 Pierre Toulier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:54
CPC Classifications
F; F02; F02N; F02N15/00; F02N15/02; F02N15/04; F02N15/06; F02N11/00; Y; Y10; Y10T; Y10T74/00; Y10T74/13; Y10T74/131
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A starter drive for an internal combustion engine comprising a helically splined shaft adapted to be rotated by a starter motor, and a movable portion comprising a sleeve threadedly received on the helical splines of the shaft and connected by a one-way clutch to a pinion, the movable portion being associated with a friction drive mechanism which comprises a retarding plate in frictional engagement with the sleeve and a plunger solenoid of which the plunger core, when in its operating position, cooperates with the plate by means of a connection of the slot and guide-rail type to prevent rotation of the plate while permitting axial motion of the plate, wherein the plunger core comprises an extension directed towards the retarding plate and co-operating with the plate by engagement means which, when the plunger is in its idle position, prevents axial motion of the plate while permitting rotation of the plate.
Claim 2
Dependent Claim
150 words
A starter drive for an internal combustion engine comprising a helically splined shaft adapted to be rotated by a starter motor, and a movable portion comprising a sleeve threadedly received on the helical splines of the shaft and connected by a one-way clutch to a pinion, the movable portion being associated with a friction drive mechanism which comprises a retarding plate in frictional engagement with the sleeve and a plunger solenoid of which the plunger core, when in its operating position, cooperates with the plate by means of a connection of the slot and guide-rail type to prevent rotation of the plate while permitting axial motion of the plate, wherein the plunger core comprises an extension directed towards the retarding plate and co-operating with the plate by engagement means which, when the plunger is in its idle position, prevents axial motion of the plate while permitting rotation of the plate.
Claim 3
Dependent Claim
36 words
A starter drive as claimed in claim 1, wherein the engagement means comprise a claw formed at the end of the extension and directed radially outwards, and a rim formed on the plate and flanged inwards.
Claim 4
Dependent Claim
39 words
A starter drive as claimed in claim 2, wherein the claw and/or the rim have inclined leading edges facilitating passage of the rim over the claw when the movable portion of the starter drive returns to its idle position.
Claim 5
Dependent Claim
46 words
A starter drive as claimed in claim 2, wherein the heights of the claw is less than the distance separating the elements of the connection of the slot and guide-rail type in the position occupied by these elements when the plunger is in its idle position.
Claim 6
Dependent Claim
46 words
A starter drive as claimed in claim 3, wherein the height of the claw is less than the distance separating the elements of the connection of the slot and guide-rail type in the position occupied by these elements when the plunger is in its idle position.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |