# US 5,709,128 A · Reversing gear for boats

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- Number: US 5,709,128 A
- Document ID: US5709128A
- Status: Granted
- Kind: A
- Application number: 08/464,757
- Filed: 1995-06-22
- Granted: 1998-01-20
- Earliest claimed: 1993-11-03
- Assignees: AB Volvo Penta
- Inventors: Lars Skyman
- Web page: https://patentgrep.com/patent/US5709128A

## CPC

- F16H 63/32: Gear shift yokes, {e.g. shift forks}
- B63H 23/08: with provision for reversing drive
- F16D 21/04: with a shaft carrying a number of rotatable transmission members, e.g. gears, each of which can be connected to the shaft by a clutching member or members between the shaft and the hub of the transmission member
- F16H 3/14: Gearings for reversal only
- F16H 2063/322: {characterised by catches or notches for moving the fork}
- Y10T 74/1921: On single driven member
- F16H: GEARING
- B63H: MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V1/14; specially adapted for submarines, other than nuclear propulsion, B63G; specially adapted for torpedoes F42B19/00)
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Reversing gear for boats, comprising a displaceable engaging sleeve (10) with a V-shaped groove (22), into which there extends a gear selector in the form of a dog (21) on a pin (29) movable in the axial direction of the engaging sleeve. The pin is excentrically mounted in a rotatable sleeve (31). A ball-and-socket joint (27,28) between the dog and the pin assures that the dog will retain its orientation and contact surface in the groove during the shifting movement.

## Claims

### Claim 1

Transmission comprising: a shaft, a pair of gears provided with frictional elements and freely rotatably mounted on said shaft, an engaging sleeve with frictional surfaces and displaceable on said shaft, said frictional surfaces being disposed to cooperate with the frictional elements of the gears to lock one of the gears to the shaft, and a dog which extends radially into a V-groove disposed excentrically in relation to a rotational axis of the engaging sleeve and which is joined to a pin housed in a bore in a rotatable sleeve element, said bore running excentrically relative to the axis of rotation of the sleeve element so that rotation of the sleeve element results in displacement of the dog in the longitudinal direction of said shaft, and the dog being connected to the pin via an articulated joint so that when the sleeve element is rotated the dog pivots relative to the pin around at least one pivot axis which is parallel to the rotational axis of the engaging sleeve.

### Claim 2 (depends on 1)

Transmission according to claim 1, wherein the articulated joint is a ball-and-socket joint.

### Claim 3 (depends on 1)

Transmission according to claim 1, wherein the dog has a profile adapted to the V-shaped groove and extends over approximately a semicircle.

### Claim 4 (depends on 2)

Transmission according to claim 2, wherein the dog has a central portion in connection to the ball-and-socket joint and end portions, which extend deeper into the V-shaped groove than do the portions therebetween.