Patent ID: 6283365
Filing Date: 2001-09-04
Classification: A61M,G06M

Abstract:
An indicator device to provide a count of a series of like linear movements of a first part of the indicator device with respect to a second part thereof; the first part comprising first and second concentric rotational rings carrying indicia progressively visible on the first part; the first and second parts having inter-engaging spaced projections such that upon linear movement of the first part the first rotational ring is indexed in rotation, and such that upon a pre-determined number of linear movements of the first part, the second rotational ring is indexed in rotation; wherein the first part is captive on the second part and spring-loaded thus to be capable of depression and release relative to the second part; and wherein the first rotational ring includes an annular array of said spaced projections engageable successively with two further annular sets of projections fixed with respect to the second part of the device such that the projections on the first rotational ring successively engage the fixed projections to cause the first rotational ring to index in rotation twice for each depression and release of the first part.