Injection device
AssigneeOwen Mumford Limited
InventorToby Cowe
Life of this patent
Estimating the term…
Abstract
In an injection device a rotary indicator element (20) indexes angularly between a pre-firing position to an injection complete position to create a visual and audible/tactile signal as the drive plunger (28) arrives at or near its fired position. The indicator element (20) has a saw tooth profile which co-operates with respective abutments (34, 40) on the plunger and a housing part of the device to control and energise indicator movement.
Claims9
An injection device including an injection complete indicator configured to provide both a visual indication and a kinetic impact indication, the device comprising:
- a housing;
- a plunger movable in said housing between cocked and fired positions under the influence of a plunger drive source;
- an indicator element biased towards an injection complete indicating position by an indicator bias;
- and
- a hold-release arrangement configured to hold the indicator element against the force of the indicator bias responsive to arrival of said plunger at or near the fired position to release said indicator element for movement under the influence of said indicator bias to move to said injection complete indicating position to impact a stop to create said kinetic impact and to provide a visual indication,
- wherein as the plunger moves toward the fired position, the plunger energizes the indicator bias, and
- the plunger and the indicator element have cooperating surfaces which engage to move the indicator element with the plunger during a portion of the plunger stroke to energize the indicator bias.
An injection device including an injection complete indicator configured to provide both a visual indication and a kinetic impact indication, the device comprising:
- a housing;
- a plunger movable in said housing between cocked and fired positions under the influence of a plunger drive source;
- an indicator element biased towards an injection complete indicating position by an indicator bias;
- and
- a hold-release arrangement responsive to arrival of said plunger at or near the fired position to release said indicator element for movement under the influence of said indicator bias to move to said injection complete indicating position to impact a stop to create said kinetic impact and to provide a visual indication,
- wherein the indicator bias biases the indicator element linearly in a direction generally opposed to that of the plunger as the plunger moves towards the fired position, and cooperating surfaces of said plunger and said indicator element act in a cammed manner to convert relative linear movement therebetween into angular movement of said indicator element.
Dependencies are inferred from the claim text.