US3732748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for the manual regulation of the speed of compression-ignition engines
Assignee: Fiat SpA
•
Filing: 1971-07-06
•
Granted: 1973-05-15
•
Expires: 1991-07-06
Abstract
Abstract The speed of a compression-ignition engine is regulated by a manually operable control device according to this invention which acts on a control lever in the engine fuel system to place the lever, with precision, selectively in engine stopped, idling speed and predetermined speed settings. The control device includes a movable body connected to an actuating cable and carrying a spring-loaded latch which is engageable in a selected detent carried by a surrounding tubular body to achieve the desired setting. The surrounding body is itself adjustable by screw action in a support so as to provide for fine adjustment of the actuating cable.
Inventors
- 👤 P Cavalli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
F; F16; F16C; F16C1/00; F16C1/10; F16C1/12; F16C1/16; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/2042; Y10T74/20426; Y10T74/20468
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
192 words
Control device for the manual regulation of the speed of a compression-ignition engine, said device comprising; i. an external support; ii. a first tubular internally threaded body supported rotatably by said external support and axially fixed relative to the latter; iii. a second tubular body having an external screw thread engaged with the internal thread of said first tubular body; iv. a third tubular body slidable axially within said second tubular body; v. stop means carried by said third tubular body; vi. means operable from the outside and controlling said stop means; vii. a plurality of detents carried by said second tubular body and selectively engageable by said stop means to control the axial position of said third tubular body relative to said second tubular body; viii. a cable attached to one end of said third tubular body, and ix. a sheath within which said cable slides, in use of the device, against the action of elastic biasing means, said cable being connectable to a control lever which controls the fuel supply to the engine in dependence on the axial position of said third tubular body relative to said first tubular body.
Claim 2
Dependent Claim
192 words
Control device for the manual regulation of the speed of a compression-ignition engine, said device comprising; i. an external support; ii. a first tubular internally threaded body supported rotatably by said external support and axially fixed relative to the latter; iii. a second tubular body having an external screw thread engaged with the internal thread of said first tubular body; iv. a third tubular body slidable axially within said second tubular body; v. stop means carried by said third tubular body; vi. means operable from the outside and controlling said stop means; vii. a plurality of detents carried by said second tubular body and selectively engageable by said stop means to control the axial position of said third tubular body relative to said second tubular body; viii. a cable attached to one end of said third tubular body, and ix. a sheath within which said cable slides, in use of the device, against the action of elastic biasing means, said cable being connectable to a control lever which controls the fuel supply to the engine in dependence on the axial position of said third tubular body relative to said first tubular body.
Claim 3
Dependent Claim
58 words
Control device according to claim 1, wherein said second tubular body comprises an externally threaded first portion which cooperates with the internal thread of said first tubular body and a cylindrical second portion projecting beyond the first tubular body and including a further support member, rigidly connected to said support, in which said cylindrical portion is slidably mounted.
Claim 4
Dependent Claim
49 words
Control device according to claim 2, wherein said detents of said second tubular body are provided on the internal surface of the latter in correspondence with the threaded portion and extend from the free end of the said threaded portion to substantially the middle of said second tubular body.
Claim 5
Dependent Claim
38 words
Control device according to claim 3, wherein said detents comprise a series of annular grooves of substantially triangular cross section and an innermost annular groove of trapezoidal cross section on the internal surface of said second tubular body.
Claim 6
Dependent Claim
62 words
Control device according to claim 1, wherein said third tubular body projects at both ends from the second tubular body and has, at its end projecting from the threaded portion of the second tubular body, opposite to the end connected to said cable, a knob having a counterbore communicating with the outside and with the internal bore of said third tubular body.
Claim 7
Dependent Claim
79 words
Control device according to claim 5, including a rod mounted slidingly in the bore of said third tubular body, a push-button connected to one end of said rod and slidable axially in the counterbore of said knob, elastic biasing means in said counterbore acting upon said push-button to urge the latter out of said counterbore, said rod extending within the bore of said third tubular body at least as far as the innermost detent of said second tubular body.
Claim 8
Dependent Claim
62 words
Control device according to claim 6, wherein said rod has a longitudinal groove the bottom surface of which includes a ramp portion extending to the free end of the rod and inclined at an acute angle to the axis of the bore of the third tubular body, said ramp portion being inclined towards the knob, and said groove receiving said stop means.
Claim 9
Dependent Claim
124 words
Control device according to claim 7, wherein said stop means comprise a substanTially prismatic member, mounted slidingly in the longitudinal groove of the rod and having an inclined wedge face cooperating with said ramp portion of said groove, a stop pin attached to the prismatic member and having its axis perpendicular to that of said third tubular body, said stop pin passing through a radial hole in the wall of the third tubular body, and resilient biasing means acting on said stop pin and urging the latter radially inwardly, said stop pin having a bevelled end adapted to engage, upon radial sliding movement of said pin against the action of said resilient biasing means, in one of said detents of the second tubular body.
Claim 10
Dependent Claim
65 words
Control device according to claim 8, wherein the resilient biasing means acting on said stop pin comprise a laminar spring located in a longitudinal groove in the surface of the bore of said third tubular body, said laminar spring having a central hole, coaxial with said radial hole in the wall of said third tubular body to permit the passage therethrough of said stop pin.
Claim 11
Dependent Claim
70 words
Control device according to claim 9, wherein the inclination of the wedge face of the prismatic member and of the ramp portion of the longitudinal groove in the rod is such as to cause the stop pin to retract completely inside the radial hole in the third tubular body under the action of the laminar spring upon axial displacement of the rod equal to the permitted movement of the push-button.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |