Hydraulic switch
OwnerVincent Edwardsinventor
Life of this patent
Estimating the term…
Abstract
The present invention relates to a hydraulic switch arrangement and a fluid switch for incorporating into a hydraulic switch arrangement that may be included in a hydraulic circuit for inhibiting flow of hydraulic fluid through a hydraulic circuit in the event of movement of an apparatus or platform from a stable to an unstable condition. Such platforms or apparatus may include for example, cranes, excavators, teletrucks and forklift trucks and roll over incidents of such machinery is common leading to numerous fatalities. Aspects of the present invention ensure fast switching in the event of a transfer from a stable to an unstable condition.
Claims13
A hydraulic switch arrangement for incorporating into a hydraulic circuit comprising:
- a first fluid switch operational in an open and closed configuration for enabling and disabling flow of hydraulic fluid through a hydraulic circuit;
- a second fluid switch having at least one through-passage configured to receive hydraulic fluid from the hydraulic circuit, the second fluid switch operational in a first operational configuration arranged to inhibit passage of hydraulic fluid through the through-passage, and a second operational configuration configured to permit passage of hydraulic fluid through the through-passage;
- the second fluid switch comprising a rotatable element rotatably mounted to a housing, at least one bearing arranged to enable relative rotation between the rotatable element and the housing, the rotatable element defining the through-passage arranged to align with a duct in the housing in the second operational configuration, wherein a hydraulic fluid flow path is defined between the duct and the at least one bearing in the first operational configuration;
- wherein the arrangement is configured such that change between the first and second operational configuration of the second fluid switch causes change in the operational state of the first fluid switch between the open and closed configuration.
A hydraulic switch arrangement for incorporating into a hydraulic circuit comprising:
- a first fluid switch operational in an open and closed configuration for enabling and disabling flow of hydraulic fluid through a hydraulic circuit;
- a second fluid switch having at least one through-passage configured to receive hydraulic fluid from the hydraulic circuit, the second fluid switch operational in a first operational configuration arranged to inhibit passage of hydraulic fluid through the through-passage, and a second operational configuration configured to permit passage of hydraulic fluid through the through-passage;
- a body formed with a chamber and a member disposed in the chamber for movement along a pre-determined path, the second fluid switch comprising the rotatable element having a pair of arms disposed on either side of the member such that the member impinges on one arm or the other in the event of movement in one direction or the other along the pre-determined path to correspondingly turn the rotatable element and change the operational configuration of the second fluid switch, a fluid flow path being defined between the first fluid switch and the chamber;
- wherein the arrangement is configured such that change between the first and second operational configuration of the second fluid switch causes change in the operational state of the first fluid switch between the open and closed configuration.
Dependencies are inferred from the claim text.