US3780602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking arrangement for vehicle gearbox
Assignee: ZF International UK Ltd
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Filing: 1972-02-16
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Granted: 1973-12-25
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Expires: 1992-02-16
Abstract
Abstract A locking arrangement for a vehicle gear box comprises a transverse passage in the gear box housing and intersecting the axes of the gear selector rods. An outside one of the rods has a recess and the remainder of the rods have transverse through bores, the recess, the bores and the passage being in alignment when a predetermined gear ratio is selected. Plungers slidable in the rod bores and members slidable in the passage between the rods are movable by an actuator to lock the rods in the position corresponding to the predetermined ratio.
Inventors
- 👤 D Thornley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:32
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/34; F16H59/00; F16H59/74; F16H2059/746; F16H63/36; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/20085; Y10T74/20104; Y10T74/20116
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
206 words
A locking arrangement for a vehicle gearbox which includes a housing and a plurality of spaced parallel rods whose axes lie in substantially the same plane and which are selectively axially movable in the housing to provide a required gear ratio, comprising a transverse passage in the housing, the axis of said passage being perpendicular to the axes of said rods, a recess on an outside one of said rods and facing an adjacent rod, a transverse bore in each of the other rods, said recess, said bores and said passage being substantially aligned when said rods are in a predetermined relative position, a plunger slidable in each said bore, said plungers being dimensioned so as to be able to lie wholely within the circumference of their respective rods, a plurality of members slidable in said passage, one of said members being engageable with said recess, an electric switch forming part of an ignition circuit for the vehicle, and an actuating element operated by said switch and engageable with another of the members so that, when said rods are in said predetermined relative position, said plungers and said members may be moved simultaneously by operation of said switch to lock said rods in said relative position.
Claim 2
Dependent Claim
206 words
A locking arrangement for a vehicle gearbox which includes a housing and a plurality of spaced parallel rods whose axes lie in substantially the same plane and which are selectively axially movable in the housing to provide a required gear ratio, comprising a transverse passage in the housing, the axis of said passage being perpendicular to the axes of said rods, a recess on an outside one of said rods and facing an adjacent rod, a transverse bore in each of the other rods, said recess, said bores and said passage being substantially aligned when said rods are in a predetermined relative position, a plunger slidable in each said bore, said plungers being dimensioned so as to be able to lie wholely within the circumference of their respective rods, a plurality of members slidable in said passage, one of said members being engageable with said recess, an electric switch forming part of an ignition circuit for the vehicle, and an actuating element operated by said switch and engageable with another of the members so that, when said rods are in said predetermined relative position, said plungers and said members may be moved simultaneously by operation of said switch to lock said rods in said relative position.
Claim 3
Dependent Claim
38 words
A locking arrangement as claimed in claim 1 in which the dimensions of said members, axially of the passage, is greater than the axial dimension of that portion of the passage in which the respective members are slidable.
Claim 4
Dependent Claim
18 words
A locking arrangement as claimed in claim 1 in which the opposite ends of said plungers are chamfered.
Claim 5
Dependent Claim
14 words
A locking arrangement as claimed in claim 1 in which said members comprise balls.
Claim 6
Dependent Claim
16 words
A locking arrangemement as claimed in claim 1 in which said actuating element comprises a cam.
Claim 7
Dependent Claim
35 words
A locking arrangement as claimed in claim 5 in which said cam is an edge cam engageable with a one of said members which is furthest remote from the said outside one of the rods.
Claim 8
Dependent Claim
226 words
A locking arrangement for a vehicle gearbox which includes a housing and a plurality of spaced parallel rods whose axes lie in substantially the same plane and which are selectively, axially movable in the housing to provide a required gear ratio, comprising a transverse passage in the housing, the axis of said passage being perpendicular to the axes of said rods, a recess on an outside one of said rods and facing an adjacent rod, a transverse bore in each of the other rods, said recess, said bores and said passage being substantially aligned when said rods are in a predetermined relative position, a plunger slidable in each said bore, said plungers being dimensioned so as to be able to lie wholly within the circumference of their respective rods, a plurality of members slidable in said passage, one of said members being engageable with said recess, an actuating element engageable with another of the members So that, when said rods are in said predetermined relative positions, said plungers and said members may be moved simultaneously to lock said rods in said relative positions, a further bore in one of said rods and a plunger slidable in said further bore, said further bore being spaced axially of the rod from the first-mentioned bore in the rod, whereby said rods may be locked in a further relative position.
Claim 9
Dependent Claim
226 words
A locking arrangement for a vehicle gearbox which includes a housing and a plurality of spaced parallel rods whose axes lie in substantially the same plane and which are selectively, axially movable in the housing to provide a required gear ratio, comprising a transverse passage in the housing, the axis of said passage being perpendicular to the axes of said rods, a recess on an outside one of said rods and facing an adjacent rod, a transverse bore in each of the other rods, said recess, said bores and said passage being substantially aligned when said rods are in a predetermined relative position, a plunger slidable in each said bore, said plungers being dimensioned so as to be able to lie wholly within the circumference of their respective rods, a plurality of members slidable in said passage, one of said members being engageable with said recess, an actuating element engageable with another of the members So that, when said rods are in said predetermined relative positions, said plungers and said members may be moved simultaneously to lock said rods in said relative positions, a further bore in one of said rods and a plunger slidable in said further bore, said further bore being spaced axially of the rod from the first-mentioned bore in the rod, whereby said rods may be locked in a further relative position.
References Cited (Backward Citations)
US2637221A
Cited
US2847871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |