US3701399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resettable,fail-safe disc brake system
Assignee: MR GASKET COMPANY A OH CORP
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Filing: 1970-10-21
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Granted: 1972-10-31
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Expires: 1990-10-21
Abstract
Abstract The invention concerns the combination comprising: (A) A PLUNGER AND CYLINDER ASSEMBLY, THE PLUNGER BEING RESPONSIVE TO FLUID PRESSURE APPLICATION TO ADVANCE RELATIVE TO THE CYLINDER TO TRANSMIT ACTUATING FORCE FOR DISPLACING A BRAKE PART INTO BRAKING ENGAGEMENT WITH A RELATIVELY ROTATING DISC, THE BRAKE PART BEING SUBJECT TO WEAR, AND (B) AUXILIARY MEANS TO MECHANICALLY ADVANCE THE PLUNGER RELATIVE TO THE CYLINDER TO DISPLACE SAID PART INTO BRAKING ENGAGEMENT WITH THE DISC, (C) SAID MEANS INCLUDING A RAM ELEMENT OPERATIVELY CONNECTED WITH THE PLUNGER AND THERE BEING INTERENGAGABLE LOAD TRANSMITTING SHOULDERS CARRIED BY SAID ELEMENT AND PLUNGER LOCATED FOR RELATIVE SHIFTING IN ONE DIRECTION IN RESPONSE TO PREDETERMINED PLUNGER ADVANCEMENT RELATIVE TO SAID MEANS THEREBY TO BLOCK RETRACTION OF THE PLUNGER RELATIVE TO SAID MEANS SO AS TO COMPENSATE FOR BRAKE PART WEAR, (D) SAID SHOULDERS BEING INTERRUPTED TO BE DISENGAGEABLE IN RESPONSE TO RELATIVE ROTATION OF SAID ELEMENT AND PLUNGER TO PERMIT RELATIVE SHIFTING OF THE SHOULDERS IN THE OPPOSITE DIRECTION FOR RE-SETTING OF THE ELEMENT RELATIVE TO THE PLUNGER.
Inventors
- 👤 Franklin B Airheart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:08
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/54
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
280 words
In a disc brake, the combination comprising a. a plunger and cylinder assembly, the plunger being responsive to fluid pressure application to advance relative to the cylinder to transmit actuating force for displacing a brake part into braking engagement with a relatively rotating disc, the brake part being subject to wear, and b. auxiliary means to mechanically advance the plunger relative to the cylinder to displace said part into braking engagement with the disc, c. said means including a ram element operatively connected with the plunger and there being interengageable load transmitting shoulders carried by said element and plunger located for relative shifting in one direction in response to predetermined plunger advancement relative to said means thereby to block retraction of the plunger relative to said means so as to compensate for brake part wear, d. said shoulders being interrupted to be disengageable in response to relative rotation of said element and plunger to permit relative shifting of the shoulders in the opposite direction for re-setting of the element relative to the plunger, e. a support sleeve carried by the cylinder and a spring operatively connected in load transmitting relation between the sleeve and cylinder to yieldably resist advancement of the plunger and to effect retraction thereof relative to the sleeve in response to decreased fluid pressure application thereto, a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction of the sleeve, and the sleeve extending about a stem portion of the plunger and located to be forcibly advanced at certain times by the plunger relative to the drag ring overcoming said frictional resistance to compensate for wear of said brake part.
Claim 2
Dependent Claim
280 words
In a disc brake, the combination comprising a. a plunger and cylinder assembly, the plunger being responsive to fluid pressure application to advance relative to the cylinder to transmit actuating force for displacing a brake part into braking engagement with a relatively rotating disc, the brake part being subject to wear, and b. auxiliary means to mechanically advance the plunger relative to the cylinder to displace said part into braking engagement with the disc, c. said means including a ram element operatively connected with the plunger and there being interengageable load transmitting shoulders carried by said element and plunger located for relative shifting in one direction in response to predetermined plunger advancement relative to said means thereby to block retraction of the plunger relative to said means so as to compensate for brake part wear, d. said shoulders being interrupted to be disengageable in response to relative rotation of said element and plunger to permit relative shifting of the shoulders in the opposite direction for re-setting of the element relative to the plunger, e. a support sleeve carried by the cylinder and a spring operatively connected in load transmitting relation between the sleeve and cylinder to yieldably resist advancement of the plunger and to effect retraction thereof relative to the sleeve in response to decreased fluid pressure application thereto, a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction of the sleeve, and the sleeve extending about a stem portion of the plunger and located to be forcibly advanced at certain times by the plunger relative to the drag ring overcoming said frictional resistance to compensate for wear of said brake part.
Claim 3
Dependent Claim
162 words
In a disc brake, the combination comprising a. a plunger and cylinder assembly, the plunger adapted to receive fluid pressure application to advance and displace a brake part in an axial direction, b. a plunger extension and an axial stem connecting the plunger and extension, c. a ram having ratchet connection to the plunger extension, d. a support sleeve extending about the stem and carried by the cylinder, and e. a spring adapted to be tensioned as the plunger advances and to effect retraction of the plunger upon decrease of said fluid pressure application, the support sleeve receiving loading exerted by the spring, f. there being a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction of the sleeve, and the sleeve located to be forcibly advanced at certain times in response to plunger extension advancement and relative to the drag ring overcoming said frictional resistance to compensate for wear of said brake part.
Claim 4
Dependent Claim
162 words
In a disc brake, the combination comprising a. a plunger and cylinder assembly, the plunger adapted to receive fluid pressure application to advance and displace a brake part in an axial direction, b. a plunger extension and an axial stem connecting the plunger and extension, c. a ram having ratchet connection to the plunger extension, d. a support sleeve extending about the stem and carried by the cylinder, and e. a spring adapted to be tensioned as the plunger advances and to effect retraction of the plunger upon decrease of said fluid pressure application, the support sleeve receiving loading exerted by the spring, f. there being a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction of the sleeve, and the sleeve located to be forcibly advanced at certain times in response to plunger extension advancement and relative to the drag ring overcoming said frictional resistance to compensate for wear of said brake part.
Claim 5
Dependent Claim
28 words
The combination of claim 2, wherein the plunger extension and ram have interconnecting ratchet shoulders subject to disengagement in response to relative rotation of the ram and extension.
Claim 6
Dependent Claim
162 words
In a disc brake, the combination comprising a. a cylinder and a plunger subject to advancement therein to effect braking force application in response to fluid pressure application to the plunger, b. auxiliary means to effect auxiliary force application to the plunger independently of said fluid pressure application to produce plunGer advancement, c. structure carried by and within the cylinder to effect plunger retraction in the absence of said plunger advancing pressure application, said structure including a sleeve shiftable in response to plunger advancement in compensating relation with wear of a brake part, and d. there being shoulders coupling said auxiliary means and plunger so as to shift in response to said wear, e. said structure also including a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction thereof, a stem portion of the plunger projecting axially through the sleeve whereby the sleeve and plunger are intercoupled to enable said shifting of the sleeve.
Claim 7
Dependent Claim
162 words
In a disc brake, the combination comprising a. a cylinder and a plunger subject to advancement therein to effect braking force application in response to fluid pressure application to the plunger, b. auxiliary means to effect auxiliary force application to the plunger independently of said fluid pressure application to produce plunGer advancement, c. structure carried by and within the cylinder to effect plunger retraction in the absence of said plunger advancing pressure application, said structure including a sleeve shiftable in response to plunger advancement in compensating relation with wear of a brake part, and d. there being shoulders coupling said auxiliary means and plunger so as to shift in response to said wear, e. said structure also including a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction thereof, a stem portion of the plunger projecting axially through the sleeve whereby the sleeve and plunger are intercoupled to enable said shifting of the sleeve.
Claim 8
Dependent Claim
29 words
The combination of claim 4, wherein said auxiliary means includes a lever and a hand operable mechanical connection to the lever to pivot same to effect said plunger advancement.
Claim 9
Dependent Claim
271 words
In a disc brake, the combination comprising a. a plunger and cylinder assembly, the plunger being responsive to fluid pressure application to advance relative to the cylinder to transmit actuating force for displacing a brake part into braking engagement with a relatively rotating disc, the brake part being subject to wear, and b. auxiliary means to mechanically advance the plunger relative to the cylinder to displace said part into braking engagement with the disc, c. said means including a ram element operatively connected with the plunger and there being interengageable load transmitting shoulders carried by said element and plunger located for relative shifting in one direction in response to predetermined plunger advancement relative to said means thereby to block retraction of the plunger relative to said means so as to compensate for brake part wear, d. said shoulders being interrupted to be disengageable in response to rotation of said ram element relative to the plunger to permit relative shifting of the shoulders in the opposite direction for re-setting of the element relative to the plunger, said ram element projecting to the exterior of said plunger and cylinder assembly to be exposed for quick manual re-setting as defined, and e. there being a sleeve extending about a stem portion of the plunger and carried by the cylinder, a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction of the sleeve, and the sleeve located to be forcibly advanced at certain times in response to plunger advancement and relative to the drag ring overcoming said frictional resistance to compensate for wear of the brake part.
Claim 10
Dependent Claim
271 words
In a disc brake, the combination comprising a. a plunger and cylinder assembly, the plunger being responsive to fluid pressure application to advance relative to the cylinder to transmit actuating force for displacing a brake part into braking engagement with a relatively rotating disc, the brake part being subject to wear, and b. auxiliary means to mechanically advance the plunger relative to the cylinder to displace said part into braking engagement with the disc, c. said means including a ram element operatively connected with the plunger and there being interengageable load transmitting shoulders carried by said element and plunger located for relative shifting in one direction in response to predetermined plunger advancement relative to said means thereby to block retraction of the plunger relative to said means so as to compensate for brake part wear, d. said shoulders being interrupted to be disengageable in response to rotation of said ram element relative to the plunger to permit relative shifting of the shoulders in the opposite direction for re-setting of the element relative to the plunger, said ram element projecting to the exterior of said plunger and cylinder assembly to be exposed for quick manual re-setting as defined, and e. there being a sleeve extending about a stem portion of the plunger and carried by the cylinder, a drag ring carried by the cylinder and frictionally engaging the sleeve to frictionally resist advancement and retraction of the sleeve, and the sleeve located to be forcibly advanced at certain times in response to plunger advancement and relative to the drag ring overcoming said frictional resistance to compensate for wear of the brake part.
Claim 11
Dependent Claim
11 words
The combination of claim 6 wherein said shoulders define a ratchet.
Claim 12
Dependent Claim
17 words
The combination of claim 6 including removable means blocking relative rotation of said ram element and plunger.
Claim 13
Dependent Claim
25 words
The combination of claim 8 including an actuator releasably connected to the ram element to urge said ram element in the direction of plunger advancement.
Claim 14
Dependent Claim
25 words
The combination of claim 6, including means operatively connected with the plunger to effect retraction thereof in response to decrease of fluid pressure application thereto.
Claim 15
Dependent Claim
24 words
The combination of claim 10 wherein said last named means includes a spring contained by the plunger to be tensioned as the plunger advances.
Claim 16
Dependent Claim
36 words
The combination of claim 6, wherein certain of said shoulders are defined by a series of flanges spaced in said direction, the ram element having an axis and the flanges being circularly interrupted about that axis.
Claim 17
Dependent Claim
13 words
The combination of claim 12, wherein said flanges are on the ram element.
Claim 18
Dependent Claim
26 words
The combination of claim 13 wherein another of said shoulders is defined by a jaw carried by the plunger and yieldably urged toward the ram element.
Claim 19
Dependent Claim
59 words
The combination of claim 13 wherein others of said shoulders are defined by jaws carried by the plunger and yieldably urged toward the ram element, said jaws being circularly spaced about said axis whereby flange and jaw disengagement may bE effected by relative rotation of the flanges and jaws to bring the flanges into the spaces between the jaws.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |