CA2520747A1 - Heavy duty electronic brake stroke indicator - Google Patents

Heavy duty electronic brake stroke indicator Download PDF

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Publication number
CA2520747A1
CA2520747A1 CA002520747A CA2520747A CA2520747A1 CA 2520747 A1 CA2520747 A1 CA 2520747A1 CA 002520747 A CA002520747 A CA 002520747A CA 2520747 A CA2520747 A CA 2520747A CA 2520747 A1 CA2520747 A1 CA 2520747A1
Authority
CA
Canada
Prior art keywords
stroke
sensor
electric
electronic
stroke indicator
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.)
Granted
Application number
CA002520747A
Other languages
French (fr)
Other versions
CA2520747C (en
Inventor
Timothy F. Martens
Thomas O. Schultz
Robert J. Hicks
Robert J. Hilding
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.)
Indian Head Industries Inc
Original Assignee
Individual
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 US08/164,396 external-priority patent/US5450930A/en
Application filed by Individual filed Critical Individual
Publication of CA2520747A1 publication Critical patent/CA2520747A1/en
Application granted granted Critical
Publication of CA2520747C publication Critical patent/CA2520747C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Valves And Accessory Devices For Braking Systems (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

Electronic stroke indicators have sensor structures (34, 60, 80, 110) which are incorporated into a stone shield (28, 62, 82, 116) for a brake actuator (20). The incorporation of the sensor (34, 66, 119) stone shield (28, 62, 116) protects the sensor (34, 60, 119) and its associated wires (50, 69, 121) and contacts from damage by the other components in the brake actuator (20). In particular, the spring is typically maintained out of contact with any of the electric portions of the electronic stroke indicator, thus prolonging the life of the electronic stroke indicator. In further features of this invention, a magnetic sensor (34) may monitor the position of magnetic portions (36) on a piston rod (32). Alternatively, a pair of electric contact switches (96, 98) may be serially contacted by a structure on the piston rod (94) as the broke moves further out of stroke. The two electric contacts (96, 98) provide different signals to an operator in a vehicle cab such that signals of the level of out-of-stroke conditions are provided to the operator. In a further embodiment, a load cell (119) monitors the compression in a spring (112) in the brake housing (111) to provide an indication of an out-of-stroke condition.
CA002520747A 1993-12-09 1994-11-29 Heavy duty electronic brake stroke indicator Expired - Lifetime CA2520747C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/164,396 1993-12-09
US08/164,396 US5450930A (en) 1993-12-09 1993-12-09 Heavy duty electronic brake stroke indicator
CA002177992A CA2177992C (en) 1993-12-09 1994-11-29 Heavy duty electronic brake stroke indicator

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002177992A Division CA2177992C (en) 1993-12-09 1994-11-29 Heavy duty electronic brake stroke indicator

Publications (2)

Publication Number Publication Date
CA2520747A1 true CA2520747A1 (en) 1995-06-15
CA2520747C CA2520747C (en) 2008-08-26

Family

ID=35253799

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002520747A Expired - Lifetime CA2520747C (en) 1993-12-09 1994-11-29 Heavy duty electronic brake stroke indicator
CA002516010A Expired - Lifetime CA2516010C (en) 1993-12-09 1994-11-29 Heavy duty electronic brake stroke indicator

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002516010A Expired - Lifetime CA2516010C (en) 1993-12-09 1994-11-29 Heavy duty electronic brake stroke indicator

Country Status (1)

Country Link
CA (2) CA2520747C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107764437A (en) * 2017-10-30 2018-03-06 太原理工大学 Drawing and pressing type concrete stress sensor
EP4282720A1 (en) * 2022-05-26 2023-11-29 TSE Brakes, Inc. Brake actuators and systems for monitoring stroke of brake actuators

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107764437A (en) * 2017-10-30 2018-03-06 太原理工大学 Drawing and pressing type concrete stress sensor
CN107764437B (en) * 2017-10-30 2023-10-31 太原理工大学 Tension-compression type concrete stress sensor
EP4282720A1 (en) * 2022-05-26 2023-11-29 TSE Brakes, Inc. Brake actuators and systems for monitoring stroke of brake actuators

Also Published As

Publication number Publication date
CA2520747C (en) 2008-08-26
CA2516010A1 (en) 1995-06-15
CA2516010C (en) 2007-04-10

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MKEX Expiry

Effective date: 20141201