US3709052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed power transmission with snap-in clutch
Assignee: Outboard Marine Corp
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Filing: 1971-09-10
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Granted: 1973-01-09
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Expires: 1991-09-10
Abstract
Abstract Disclosed herein is a variable speed V-belt power transmission including an arrangement for automatically and rapidly initially engaging an axially movable sheave member with a V-belt in response to the attainment by the sheave member of an increased rotary speed above a minimum rotary speed at which subsequent continuing V-belt driving engagement can be maintained. Also disclosed herein are means for adjusting the power transmission so that initial engagement of the movable sheave member with the V-belt will occur at varying rotary speeds depending upon the adjustment.
Inventors
- 👤 G Lassanske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:05
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/56; F16H55/563
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
255 words
A power transmission comprising a shaft adapted for connection to a power source and having a splined portion, a first member fixed to said shaft and having a flange, a second member having a flange and a splined portion slidably engaged on said splined shaft portion with said second member flange in facing relation to said first member flange and for axial movement of said second member on said shaft between a first position with said second member flange at a first spacing from said first member flange and a second position with said second member flange at a greater spacing from said first member flange, first biasing means urging said second member toward said second position and effective, in the absence of rotation of said shaft, to locate said second member in said second position, second biasing means urging said second member toward said first position in response to rotation of said shaft, said first biasing means being overpowered by said second biasing means upon rotation of said shaft above a predetermined speed, whereby upon rotation above said predetermined speed there is provided, in response to variation in the rate of rotation of said shaft, a variable net force urging said second member toward said first position, blocking means movable to a blocking position for releasably preventing axial movement of said second member from said second position and toward said first position, and means for applying said net force to said blocking means so as to displace said blocking means from said blocking position.
Claim 2
Dependent Claim
255 words
A power transmission comprising a shaft adapted for connection to a power source and having a splined portion, a first member fixed to said shaft and having a flange, a second member having a flange and a splined portion slidably engaged on said splined shaft portion with said second member flange in facing relation to said first member flange and for axial movement of said second member on said shaft between a first position with said second member flange at a first spacing from said first member flange and a second position with said second member flange at a greater spacing from said first member flange, first biasing means urging said second member toward said second position and effective, in the absence of rotation of said shaft, to locate said second member in said second position, second biasing means urging said second member toward said first position in response to rotation of said shaft, said first biasing means being overpowered by said second biasing means upon rotation of said shaft above a predetermined speed, whereby upon rotation above said predetermined speed there is provided, in response to variation in the rate of rotation of said shaft, a variable net force urging said second member toward said first position, blocking means movable to a blocking position for releasably preventing axial movement of said second member from said second position and toward said first position, and means for applying said net force to said blocking means so as to displace said blocking means from said blocking position.
Claim 3
Dependent Claim
112 words
A power transmission in accordance with claim 1 and further including third biasing means releasably retaining said blocking means in said blocking position preventing axial movement of said second member from said second position and toward said first position, said third biasing means being overpowered by said net force when said net force exceeds a predetermined force level, whereupon said blocking means moves from said position preventing axial movement of said second member from said second position and toward said first position and immediately thereafter said second member moves toward said first position in response to the action of said net force and independently of the action of said third biasing means.
Claim 4
Dependent Claim
52 words
A power transmission is accordance with claim 2 including means for adjustably varying the bias exerted by said third biasing means whereby the rotational speed of said second member which is effective to cause overpowering of said third biasing means will vary in accordance with the adjustment of said third biasing means.
Claim 5
Dependent Claim
61 words
A power transmission in accordance with claim 3 wherein said blocking means comprises an element movable radially to and from said blocking position in the path of said second member movement and a part movable between a first position locating said blocking element in said blocking position and a second position permitting movement of said blocking element from said blocking position.
Claim 6
Dependent Claim
20 words
A power transmission in accordance with claim 4 wherein said third biasing means urges said part toward said first position.
Claim 7
Dependent Claim
119 words
A power transmission in accordance with claim 1 wherein said blocking means comprising means in said shaft defining an axial bore, means in said shaft defining a radial aperture communicating with said bore, a ball partially located in said aperture and movable between a blocking position in the path of movement of said second member from said second position and a retracted position clear of the path of said second member from said second position, a plunger movable in said bore between a blocking position preventing movement of said ball from said blocking position and a release position permitting movement of said ball to said retracted position, and spring means for releasably retaining said plunger in said blocking position.
Claim 8
Dependent Claim
27 words
A power transmission in accordance with claim 6 wherein said spring means comprises a helical spring encircling said plunger and urging said plunger toward said blocking position.
Claim 9
Dependent Claim
21 words
A power transmission in accordance with claim 7 and further including means for adjusting the force exerted by said spring means.
Claim 10
Dependent Claim
77 words
A power transmission in accordance with claim 8 wherein said means for adjusting the force exerted by said spring means comprises a threaded portion on said plunger, an adjusting nut on said threaded portion in engagement with one end of said helical spring, whereby variation of the location of said adjusting nut on said plunger varies the magnitude of the force exerted by said helical spring, and means for releasably securing said adjusting nut in adjusted position.
Claim 11
Dependent Claim
28 words
A power transmission in accordance with claim 9 wherein said means for releasably securing said adjusting nut in adjusted position comprises a lock nut on said threaded portion.
Claim 12
Dependent Claim
95 words
A power transmission in accordance with claim 6 wherein said net force applying means comprises said ball, means on said second member defining a seat engaged by said ball when said second member is in said second position and said ball is in said blocking position, said seat including an inclined surface in engagement with said ball, and a portion on said plunger which engages said ball when said plunger is in said blocking position and said ball is in said blocking position, said plunger portion including an inclined surface in engagement with said ball.
Claim 13
Dependent Claim
27 words
A power transmission in accordance with claim 11 wherein projections of said seat surface and said plunger surface form an acute angle of less than about 45*.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |