EP0103512A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Adjustment assembly for a disc brake
Assignee: Honeywell International Inc
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Filing: 1983-09-01
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Granted: —
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Expires: 2003-09-01
Abstract
Abstract An adjustment assembly for a disc brake includes a nut (26) and a threaded stem (28). The threaded stem (281 defines a first diameter portion (72) and a second diameter portion (76) which cooperate to form a differential area sealingly engaging an inwardly extending partition. The partition also forms a passage (88) to cbmmunicate fluid pressure to both portions (72, 76) so that the differential area and pressure communicating passage are compactly arranged at the partition.
Inventors
- 👤 Dean Edward Runkle
- 👤 James John Colpaert
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 02:29
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/56; F16D65/567; F16D65/14; F16D65/16; F16D65/18; F16D2121/00; F16D2121/02; F16D2121/14; F16D2123/00; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/22; F16D2125/26; F16D2125/28; F16D2125/30; F16D2125/58; F16D2125/66
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
263 words
An adjustment assembly for a disc brake wherein a caliper (12) includes a stepped bore (16) for receiving a piston (18), the adjustment assembly (24) comprising a nut (26) cooperating with the piston to limit retraction of the latter upon termination of braking and a threaded stem (28) cooperating with the nut to limit retraction of the nut, the nut (26) being adjustable relative to the threaded stem (28) upon initial braking when the fluid pressure communicated to the caliper is below a predetermined value and the threaded stem (28) being pressure responsive to the fluid pressure communicated to the caliper to substantially limit adjustment of the nut (26) relative to the threaded stem (28) when the fluid pressure communicated to the caliper is above the predetermined value, characterized in that said stepped bore (16) defines a first diameter portion (74) sealingly engaging said threaded stem (28) and a second diameter portion (76) sealingly engaging said threaded stem, said second diameter portion being larger than said first diameter portion whereby fluid pressure acting against said threaded stem above the predetermined level biases said threaded stem to move toward said piston (18), said threaded stem (28) cooperating with said stepped bore (16) to define a chamber (84) between said sealing engagements and vented to atmosphere and said caliper or threaded stem defining a passage (88) remote from said chamber for communicating fluid pressure acting against said threaded stem (28) at said first diameter portion (74) to said second diameter portion (76) for acting against said threaded stem (28) at said second diameter portion (76).
Claim 2
Dependent Claim
263 words
An adjustment assembly for a disc brake wherein a caliper (12) includes a stepped bore (16) for receiving a piston (18), the adjustment assembly (24) comprising a nut (26) cooperating with the piston to limit retraction of the latter upon termination of braking and a threaded stem (28) cooperating with the nut to limit retraction of the nut, the nut (26) being adjustable relative to the threaded stem (28) upon initial braking when the fluid pressure communicated to the caliper is below a predetermined value and the threaded stem (28) being pressure responsive to the fluid pressure communicated to the caliper to substantially limit adjustment of the nut (26) relative to the threaded stem (28) when the fluid pressure communicated to the caliper is above the predetermined value, characterized in that said stepped bore (16) defines a first diameter portion (74) sealingly engaging said threaded stem (28) and a second diameter portion (76) sealingly engaging said threaded stem, said second diameter portion being larger than said first diameter portion whereby fluid pressure acting against said threaded stem above the predetermined level biases said threaded stem to move toward said piston (18), said threaded stem (28) cooperating with said stepped bore (16) to define a chamber (84) between said sealing engagements and vented to atmosphere and said caliper or threaded stem defining a passage (88) remote from said chamber for communicating fluid pressure acting against said threaded stem (28) at said first diameter portion (74) to said second diameter portion (76) for acting against said threaded stem (28) at said second diameter portion (76).
Claim 3
Dependent Claim
41 words
The adjustment assembly of claim 1 in which a spacer (46) sealingly engages said caliper stepped bore adjacent said second diameter portion (76) to enclose one end of said threaded stem (28) within a reaction chamber (92) communicating with said passage.
Claim 4
Dependent Claim
48 words
The adjustment assembly of claim 2 in which said spacer (46) sealingly engages said stepped bore at a third diameter portion (66) adjacent said second diameter portion (76), said second and third diameter portion cooperating to define a shoulder therebetween (96) and said passage (88) intersects said shoulder.
Claim 5
Dependent Claim
127 words
The adustment assembly of claim 1 in which said caliper defines a radially inwardly extending partition (68) with a central opening defining said first and second diameter portions, said partition (68) separating an enlarged diameter portion (60) of said bore (16) from a third diameter portion (66) of said bore, said enlarged diameter portion (60) receiving said piston (18), said third diameter portion (66) receiving a mechanical actuator (40) which is operable to move the threaded stem (28) and nut (26) toward said piston (18) and said radially inwardly extending partition (68) defining said passage (88), said first diameter portion (74), and said second diameter portion (76) whereby a differential area for said stem (28) is disposed in axial alignment with said radially inwardly extending partition (68).
References Cited (Backward Citations)
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