US3682279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake actuating mechanism for rapid take up of running clearance and gradual application of brake setting force
Assignee: Venturedyne Ltd
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Filing: 1970-03-09
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Granted: 1972-08-08
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Expires: 1990-03-09
Abstract
Abstract A plurality of stationary metallic discs are alternately arranged with and selectively moved into and out of braking engagement with a plurality of rotating friction discs. A rotatable member carrying an adjustable pin is movable axially to move the pin into engagement with a pressure arm which acts on the stationary discs to set the brake by interengagement of the stationary and rotating discs. The rotatable member includes a cam surface which engages a fixed cam guide such that, as the rotatable member is rotated, the member and pin move jointly in an axial direction with respect to the discs. The cam surface includes a first rise portion for rapid and relatively greater axial travel during initial brake movement to take up the release or running clearance. The cam also includes a relatively shallow rise portion to provide a gradual application of a relatively high brake setting force with reduced axial travel after the release clearance has been taken up. A ratchet and pawl arrangement provides for axial adjustment of the pin with respect to the disc to compensate for disc wear. The brake actuator is of the spring set and electromagnetically released type and includes a manual release. A damper is included in the actuator and is adjustable to provide for adjustment of the brake setting time independent of setting torque. The damper also prevents overriding of the cam guide and surface as the brake is set.
Inventors
- 👤 Karl Palme
- 👤 Raymond L Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:57
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/567; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D59/00; F16D59/02; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/22; F16D2125/28; F16D2125/32; F16D2127/00; F16D2127/007
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
143 words
Rotary motion control apparatus comprising, in combination, a plurality of rotatable discs, a plurality of stationary discs alternately arranged with said rotatable discs and supported for selective movement into and out of engagement with said rotatable discs to alternately clamp said discs against and release said discs for relative rotational movement, operating means operatively associated with said discs and through which the force for moving said discs into engagement is transmitted, said operating means comprising, a first and second member, one of said members including a cam surface having a varying cam rise, the other of said members having cam engaging means whereby relative movement of said members provides non-linear advancement of one of said members in a brake setting direction to provide the force for clamping said discs, and force generating means operatively associated with said members for producing relative movement therebetween.
Claim 2
Dependent Claim
143 words
Rotary motion control apparatus comprising, in combination, a plurality of rotatable discs, a plurality of stationary discs alternately arranged with said rotatable discs and supported for selective movement into and out of engagement with said rotatable discs to alternately clamp said discs against and release said discs for relative rotational movement, operating means operatively associated with said discs and through which the force for moving said discs into engagement is transmitted, said operating means comprising, a first and second member, one of said members including a cam surface having a varying cam rise, the other of said members having cam engaging means whereby relative movement of said members provides non-linear advancement of one of said members in a brake setting direction to provide the force for clamping said discs, and force generating means operatively associated with said members for producing relative movement therebetween.
Claim 3
Dependent Claim
98 words
The combination according to claim 1 wherein said operating means further includes a mounting plate having generally cylindrical housing means, said first member comprises a generally cylindrical shaft mounted for axial and rotatable movement in said housing means and having a flange portion including said cam surface, said second member mounted in said housing means and including a cam guide for engaging said cam surface whereby, as said first member is rotated, said engagement between said cam guide and cam surface provides axial movement of said first member in said brake setting direction to produce said clamping force.
Claim 4
Dependent Claim
20 words
The combination according to claim 2 wherein said cam guide comprises a cam roller rotatably mounted in said housing means.
Claim 5
Dependent Claim
94 words
The combination according to claim 2 wherein said varying cam surface comprises a first and second portion, said first portion having a fast rising surface, said second portion having a relatively shallow rising surface, said first portion providing relatively rapid and greater axial movement of said first member in response to relative movement of said first and second members, said second portion providing a relatively gradual and less axial movement Of said first member with a relatively high force between said operating means and discs in response to further rotation of said first member.
Claim 6
Dependent Claim
97 words
The combination according to claim 4 wherein said operating means includes, an operating pin rotatably mounted in said first member, said pin arranged for axial movement jointly and relative to said first member, said pin having a head extending from said first member toward said discs and operatively associated with said discs to apply the clamping force between said stationary discs and said rotating discs, and wear adjustment means for automatically adjusting said operating pin axially relative to said first member when said first member axial movement in clamping and releasing said discs exceeds a preselected amount.
Claim 7
Dependent Claim
87 words
The combination according to claim 5 wherein said wear adjustment means comprises a ratchet and pawl, said ratchet mounted on said operating pin for joint rotation therewith and including a plurality of teeth and tooth surfaces, said pawl mounted in fixed relationship to said ratchet for engagement with said teeth and tooth surfaces such that, when said ratchet rotates a preselected amount, said pawl will engage a subsequent tooth providing for axial adjustment of said pin relative to said first member as said clamping force is released.
Claim 8
Dependent Claim
52 words
The combination according to claim 6 wherein said operating pin includes an O-ring groove in said first member, an O-ring mounted in said groove for friction engagement with said first member such that said operating pin is prevented from rotation relative to said first member except when said wear adjustment means operates.
Claim 9
Dependent Claim
73 words
The combination according to claim 1 wherein said force generating means comprises, electromagnetic means connected to and operative when energized to rotate one of said members to move said operating means to release the clamping force on said discs, and spring means connected to said one member and operative when said electromagnetic means is de-energized to rotate said one member to move said operating means to apply said clamping force to said discs.
Claim 10
Dependent Claim
23 words
The combination according to claim 8 including damping means associated with said spring means and acting against the application of said clamping force.
Claim 11
Dependent Claim
32 words
The combination according to claim 9 wherein said damping means is adjustable to vary the action thereof against said spring means so that the setting time of said brake can be varied.
Claim 12
Dependent Claim
113 words
The combination according to claim 1 wherein said operating means includes a member movable into and out of engagement with said discs to selectively apply a clamping force thereto and release said discs for relative movement therebetween, and said cam surface operatively connected to said movable member for producing the movement thereof to apply said clamping force, said cam surface having a first relative fast rise portion operative during initial operation of said operating means in taking up release clearance prior to applying said braking force and said cam surface further having a second relatively shallow rising surface operative after said fast rise portion to apply said clamping force in a gradual manner.
Claim 13
Dependent Claim
195 words
Rotary motion control apparatus comprising, in combination, a plurality of rotatable discs, a plurality of stationary discs alternately arranged with said rotatable discs and supported for selective movement into and out of engagement with said rotatable discs to alternately clamp said discs against and release said discs for relative rotational movement, operating means operatively associated with said discs and through which the force for moving said discs into engagement is transmitted, said operating means comprising, first and second members and means connected between said first and second members operative in response to relative movement between said first and second members to produce relatively fast movement of one of said members in a Brake setting direction during the initial operation of said operating means to apply said braking force so that release clearance is taken up with minimum travel of said operating means and further operative after said initial operation to apply said clamping force in a gradual manner so that said one member advances in a non-linear manner in a brake setting direction to provide the force for clamping said discs, and force generating means operatively associated with said members for producing relative movement there-between.
Claim 14
Dependent Claim
195 words
Rotary motion control apparatus comprising, in combination, a plurality of rotatable discs, a plurality of stationary discs alternately arranged with said rotatable discs and supported for selective movement into and out of engagement with said rotatable discs to alternately clamp said discs against and release said discs for relative rotational movement, operating means operatively associated with said discs and through which the force for moving said discs into engagement is transmitted, said operating means comprising, first and second members and means connected between said first and second members operative in response to relative movement between said first and second members to produce relatively fast movement of one of said members in a Brake setting direction during the initial operation of said operating means to apply said braking force so that release clearance is taken up with minimum travel of said operating means and further operative after said initial operation to apply said clamping force in a gradual manner so that said one member advances in a non-linear manner in a brake setting direction to provide the force for clamping said discs, and force generating means operatively associated with said members for producing relative movement there-between.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |