Actuator and a bow
AssigneeBSH Industries ApS
InventorBent Schultz Hansen
Life of this patent
Estimating the term…
Abstract
A pneumatic actuator having therein a venting element and a porous element, compression and elongation of the actuator creating an air flow in the venting element and porous element to output lubricant as a mist toward a sliding interface of the actuator. A bow using the actuator and a bow having a double string preventing sideward movement when launching an arrow. A compound bow having limbs with multiple rotatable elements and an actuator rotating such elements to launch an arrow.
Claims13
A pneumatic actuator for an archery bow, the pneumatic actuator comprising:
- a first portion and a second portion, the first portion defining a closed channel, the second portion having a part being slideably positioned in the channel, the part having an end portion positioned in the channel, the first and second portions defining an elongate compartment comprising at least a portion of the channel;
- a lubricating element provided in the channel, the lubricating element comprising:
- a first surface facing the first portion;
- a second surface facing the second portion;
- one or more channels extending from the first surface to the second surface;
- and
- a lubricant in or on the lubricating element;
- and
- a venting element in sliding engagement to at least one of the first portion and the second portion.
A bow comprising a frame and a string, the string being connected to the frame via two cams being positioned at opposite ends of the frame, the frame comprising:
- a central portion having two extreme portions;
- a first portion and a second portion, each of the first and second portions of the frame having a first end and a second end, each of the first and second portions of the frame being rotatably attached, at the first end, to or at an extreme portion of the central portion, each of the cams being attached to or at the second end of one of the first and second portions of the frame;
- and
- at least two pneumatic actuators, of which one is positioned between the central and first portion of the frame, and another one is positioned between the central and second portion of the frame, the at least two pneumatic actuators each comprising:
- a lubricating element provided in a channel of the respective pneumatic actuator, the lubricating element comprising:
- a first surface facing a first portion of the respective pneumatic actuator;
- a second surface facing a second portion of the respective pneumatic actuator;
- one or more channels extending from the first surface to the second surface;
- and
- a lubricant in or on the lubricating element;
- and
- a venting element in sliding engagement to at least one of the first portion and the second portion.
Dependencies are inferred from the claim text.