AU690415B2 - Silencer for an outboard motor - Google Patents

Silencer for an outboard motor Download PDF

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Publication number
AU690415B2
AU690415B2 AU45889/96A AU4588996A AU690415B2 AU 690415 B2 AU690415 B2 AU 690415B2 AU 45889/96 A AU45889/96 A AU 45889/96A AU 4588996 A AU4588996 A AU 4588996A AU 690415 B2 AU690415 B2 AU 690415B2
Authority
AU
Australia
Prior art keywords
silencer
outwardly directed
outboard motor
propeller
flanges
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU45889/96A
Other versions
AU4588996A (en
Inventor
Bruce Norman Boys
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steadfast Marine Pty Ltd
Original Assignee
MAY BOYS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AUPN1571A external-priority patent/AUPN157195A0/en
Application filed by MAY BOYS filed Critical MAY BOYS
Priority to AU45889/96A priority Critical patent/AU690415B2/en
Publication of AU4588996A publication Critical patent/AU4588996A/en
Assigned to Boys, May reassignment Boys, May Alteration of Name(s) of Applicant(s) under S113 Assignors: Boys, Bruce Norman
Application granted granted Critical
Publication of AU690415B2 publication Critical patent/AU690415B2/en
Assigned to Steadfast Marine Pty Ltd reassignment Steadfast Marine Pty Ltd Alteration of Name(s) in Register under S187 Assignors: Boys, May
Assigned to Zamogrill Pty Ltd reassignment Zamogrill Pty Ltd Alteration of Name(s) in Register under S187 Assignors: Steadfast Marine Pty Ltd
Assigned to Steadfast Marine Pty Ltd reassignment Steadfast Marine Pty Ltd Request to Amend Deed and Register Assignors: Zamogrill Pty Ltd
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for outboard marine engines

Description

P00011 Regulation 3.2
AUSTRALIA
Patents Act, 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT TO BE COMPLETED BY THE APPLICANT 0 Co NAME OF APPLICANT: ACTUAL INVENTOR: ADDRESS FOR SERVICE:
O
BfRUCE-N'ORMAN-BOYS M/A/ BOYS BRUCE NORMAN BOYS Peter Maxwell Associates Blaxland House Suite 10, 5 Ross Street NORTH PARRAMATTA NSW 2151 SILENCER FOR AN OUTBOARD MOTOR NO(S): AU PN 1571 7 March 1995 INVENTION TITLE: *o *s DETAILS OF ASSOCIATED PROVISIONAL APPLICATION The following statement is a full description of this invention including the best method of performing it known to me:- This invention relates to outboard motors and more particularly to silencing means for outboard motors to be used when the outboard motor is operated out of the water.
During normal operation, outboard motors are usually cooled by the forced flow of salt water and exhaust gasses are discharged through the hub of the propeller under water thereby muffling the exhaust noise.
After use, fresh water is usually fed through the cooling system to flush out any residual salt water. When run out of the water, the exhaust of the outboard motor is not muffled and thus there is a need for a silencer to be used with the outboard motor when the motor is operated out of the water.
According to the invention there is provided a silencer for an outboard motor comprising:an inner member having an outwardly directed flange, an outer member sliceable over the inner member and having an outwardly directed flange, compressible sealing means between the outwardly directed flanges, and adjustable connecting means connecting the inner and outer members together and adapted to move the members and hence the flanges relative to one another so as to compress or relax the sealing means, the arrangement being such that the sealing means may be located in the hub of the propeller of an outboard motor so that when the flanges are moved relatively towards one another, the sealing means is compressed and forced outwardly to form a radially extending seal between the silencer and the hub of the propeller.
In one form of the invention, the inner and outer tubular canister being of slightly larger diameter than the inner canister and being coaxially located with respect to the inner canister.
Preferably, the connecting means comprises a threaded member extending axially from the end of the canister remote from the outwardly directed flange which passes through an aperture in the end of the outer canister remote from its outwardly directing flange and a threaded adjustment member engaged on the threaded member.
In order that the invention ma be more readily understood and put into practical effect, reference will now be made to the accompanying drawings in which:- Fig. 1 is a perspective view of a silencer for an outboard motor according to one embodiment of the invention, Fig. 2 is an exploded perspective view of the silencer of Fig. 1, shown in relation to the hub and propeller of an outboard motor.
Fig. 3 is a cross-sectional view of a silencer shown in Fig. 1, and Fig. 4 is a diagrammatic view of the silencer mounted in the hub of the propeller of an outboard motor.
The silencer 10 shown in the drawings includes an inner member 11 having an outwardly directed flange 13 and an outer member 12 slideable over the inner member 11 and having an outwardly directed flange 14.
In this instance, the inner member 11 is an aluminium canister of circular cross-section and has a closed end 15 remote from the outwardly directed flange 13. The outer member 12 is also an aluminium canister of circular cross-section and has a closed end 16 remote from its outwardly directed flange 14.
A compressible sealing means or O ring 1'7 is located between the outwardly directed flanges 13 and 14. Extending coaxially outwardly from the end 15 of the inner member 11 there is a threaded member 18 that passes through an aperture 20 in the end 16 of the outer member 12. The head of the threaded member 18 engages against a strengthening plate 22 and is secured in place by nut 18a. The threaded member 18 is engaged by a threaded adjustment member 19 which bears against a second
I
strengthening member 22. Rotation of the adjustment member 19 in one direction will draw the inner and outer members 11, 12 and hence the flanges 13, 14 together thereby compressing the sealing means 17 which will be deformed outwardly as indicted in Fig. 2. Rotation of the adjustment member 19 in the other direction will move the inner members 11, 12 and hence the flanges 13, 14 away from one another to relax the sealing means 17.
As shown in Fig. 4 the sealing means 17 is located in the hub 20 of a propeller 21. The adjustment means 19 is then rotated to draw the inner and outer members 11, 12 to one another thereby compressing the sealing mans 17 between the flanges 13, 14 to form a seal between the silencer and the hub of the propeller. Rotation of the adjustment means in the other direction, will relax the sealing means 17 so that the silencer can be withdrawn from the hub.
As can be seen in Fig. 4, the silencer 10 can be additionally held in place by an elastic tie-strap 23 which is anchored to the outer member 12 and which is engaged around the blades of the propeller 21.
In order to accommodate the various sizes of propellers and their hubs, the silencer of the invention can be manufactured in various sizes.
All will be apparent, once the silencer is securely in place, the outboard motor may be started up and run whilst being flushed with fresh water o°0° without generating undue exhaust noose.
It will be appreciated thai various modifications may be made in details of design and construction without departing from the scope and ambit of the invention.
I I

Claims (4)

1. A silencer for an outboard motor comprising:- an inner member having an outwardly directed flange, an outer member slideable over the inner member and having an outwardly directed flange, compressible sealing means between the outwardly directed flanges, and adjustable connecting means connecting the inner and outer members together and adapted to move the members and hence the flanges relative to one another so as to compress or relax the sealing means, the arrangement being such that the sealing means may be located in the hub of the propeller of an outboard motor so that when the flanges are moved relatively towards one another, the sealing means is compressed and forced outwardly to form a radially extending seal between the silencer and the hub of the propeller.
2. A silencer according to claim 1 wherein the inner and outer members are in the form of tubular canisters with the outer tubular canister being of slightly larger diameter than the inner canister and being coaxially located with respect to the inner canister.
3. A silencer according to claim 1 or clam 2 wherein the connecting means comprises a threaded member extending axially from the end of the •**canister remote from the outwardly directed flange which passes through an aperture in the end of the outer canister remote from its outwardly directing flange and a threaded adjustment member engaged on the threaded member. 6
4. A silencer according to any one of the preceding claims and including an elastic strap anchored to the outer member adapted to be engaged around two blades of the propeller. A silencer for an outboard motor substantially as hereinbefore described with reference to the accompanying drawings. Dated this 1 day of March 1996 BRUCE-N4R-MAN BOYS- N'/Y Patent Attorneys for the Applicant PETER MAXWELL ASSOCIATES 8EC. -o 113 $*4y r r r r r r cc ro O Y ABSTRACT A silencer (10) for an outboard motor consists of an inner member (11) having an outwardly directed flange an outer member (12) having an outwardly directed flange (14) and a sealing ring (17) between the outwardly directed flanges (13 and 14). The members (11 and 12) are moved relative to one another by a threaded connector The silencer is placed in the hub of the propeller of an outboard motor so that when the flanges (13 and 14) are moved towards one another, the sealing ring (17) is compressed and forced outwardly to form a radially extending seal between the silencer (10) and the hub of the propeller. S0 s 0 ses II f S f C.
AU45889/96A 1995-03-07 1996-03-05 Silencer for an outboard motor Ceased AU690415B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45889/96A AU690415B2 (en) 1995-03-07 1996-03-05 Silencer for an outboard motor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPN1571 1995-03-07
AUPN1571A AUPN157195A0 (en) 1995-03-07 1995-03-07 Silencer for an outboard motor
AU45889/96A AU690415B2 (en) 1995-03-07 1996-03-05 Silencer for an outboard motor

Publications (2)

Publication Number Publication Date
AU4588996A AU4588996A (en) 1996-09-19
AU690415B2 true AU690415B2 (en) 1998-04-23

Family

ID=25627376

Family Applications (1)

Application Number Title Priority Date Filing Date
AU45889/96A Ceased AU690415B2 (en) 1995-03-07 1996-03-05 Silencer for an outboard motor

Country Status (1)

Country Link
AU (1) AU690415B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211303A (en) * 1976-02-03 1980-07-08 Recourt Martyn Elizabeth De Sound absorbing device
US4966253A (en) * 1989-08-23 1990-10-30 Howard Stephens Muffler device for exhaust systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211303A (en) * 1976-02-03 1980-07-08 Recourt Martyn Elizabeth De Sound absorbing device
US4966253A (en) * 1989-08-23 1990-10-30 Howard Stephens Muffler device for exhaust systems

Also Published As

Publication number Publication date
AU4588996A (en) 1996-09-19

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