Advancing/retracting mechanism
AssigneeSanford, L.P.
InventorsNeville E. Andrews, Andrew Bielecki
Life of this patent
Estimating the term…
Abstract
An advancing/retracting mechanism having a pair of cams is disclosed. The advancing/retracting mechanism includes a first cam, a second cam, and a barrel. The first cam includes an angled surface and a shoe, and the second cam includes an angled surface and a slider. The shoe engages with a helical surface in the barrel, and the slider engages with a straight surface in the barrel. The first cam travels a first distance along the longitudinal axis of the barrel from a first to a second state, and the second cam travels a second distance that is greater then the first distance along the longitudinal axis of the barrel from the first to the second state.
Claims18
A advancing/retracting mechanism comprising:
- a first cam including an angled surface and one of a first shoe and a helical surface having an axis of rotation;
- a second cam including an angled surface and one of a second shoe and a surface perpendicular to the axis of rotation;
- and
- a barrel including the other of the first shoe and the helical surface and the other of the second shoe and the perpendicular surface, the first shoe abutting the helical surface and the second shoe abutting the perpendicular surface, at least a portion of one of the cams being disposed in the barrel,
- wherein the angled surfaces of the first and second cams substantially correspond in a first state, and are at least partially opposed in a second state, and the first cam travels a first distance along the longitudinal axis of the barrel from the first to the second state and the second cam travels a second distance that is greater then the first distance from the first to the second state.
An advancing/retracting mechanism comprising:
- a first cam including a first end and a second end, wherein the first end has a first angled surface and the second end operatively receives input from a user;
- a second cam including a first end and a second end, wherein the first end has a second angled surface that engages with the first angled surface, and the second end operatively activates an output device;
- and
- a barrel for receiving at least one of the first and second cams, the barrel including a helical surface, wherein a portion of the at least one of the first and second cams engages the helical surface as the at least one cam traverses from a first to a second position and rotates the cam relative to the other cam.
An advancing/retracting mechanism comprising:
- a first cam including a first end and a second end, wherein the first end has a first angled surface and the second end operatively receives input from a user;
- a second cam including a first end and a second end, wherein the first end has a second angled surface that engages with the first angled surface, and the second end operatively activates an output device;
- and
- a barrel including an inner helical surface, wherein a portion of one of the first and second cams is actuated along the inner helical surface from a first axial position to a second position axial position and simultaneously rotates relative to the other of the first and second cams during the advancing/retracting process.
Dependencies are inferred from the claim text.