Back to results
US 2023/0201500 A1Published application
Variable camshaft
AssigneeITT Manufacturing Enterprises, Inc.
InventorA. David SANDIFORD
Life of this patent
Estimating the term…
Abstract
A one or more plane, variable camshaft is described. The single plane camshaft includes a circular drive plate with two radial drive slots on opposing sides of the center, four arms movably coupled at respective endpoints and arranged in a polar configuration, and a scroll plate to allow adjustable operation of the camshaft. Multiple plane camshafts may include a number of half drive plates arranged around a drive block and secured to a base washer through a scroll block. The variable camshaft may be incorporated into portable, motorized or manual, bag valve mask based resuscitation devices or similar ones.
Claims20
A single plane variable camshaft comprising:
- a drive plate comprising a first substantially circular plate member, a center shaft member protruding from a center of the first circular plate member, wherein the first circular plate member defines two radial drive slots on opposing sides of the center shaft member;
- four arms movably coupled at respective endpoints and arranged in a polar configuration;
- four roller extensions coupled to respective end points of two pairs of the arms, wherein one pair of the roller extensions are arranged to fit into respective radial drive slots;
- and
- a scroll plate comprising a second substantially circular plate member, wherein
- the second substantially circular plate member defines a substantially circular center hole to fit around the center shaft member and two “S” shaped scroll slots on opposing sides of the center hole, and
- another pair of the roller extensions are arranged to fit into respective scroll slots.
4 more elements
A dual plane variable camshaft comprising:
- a base washer;
- a drive block aligned centrally with the base washer;
- a first half drive camshaft comprising a first camshaft member and a first stud that protrudes transversally from the first camshaft member, wherein the first camshaft member defines a substantially centrally located first opening to fit around the drive block;
- a second half drive camshaft comprising a second camshaft member and a second stud that protrudes transversally from the second camshaft member, wherein the second camshaft member defines a substantially centrally located second opening to fit around the drive block and a third opening to fit around the first stud;
- a substantially circular scroll block that defines a substantially circular center hole to fit around a threaded top portion of the drive block and two “S” shaped scroll slots on opposing sides of the center hole;
- a fastening mechanism to secure the transversally ordered base washer, drive block, first half drive camshaft, second half drive camshaft, and scroll block together, wherein the fastening mechanism is arranged to thread to the threaded top portion of the drive block;
- and
- a cover plate to fit into a substantially circular opening at a top surface of the scroll block.
5 more elements
A bag mask valve (BMV) based resuscitator comprising:
- an inflatable bag arranged to provide air to a patient through a face mask or an endotracheal tube in response to compression/retraction actions applied to the inflatable bag;
- a motor;
- a pair of levers positioned to surround a central portion of the inflatable bag and arranged to provide the compression/retraction actions to the inflatable bag in response to a rotational motion from the motor;
- and
- a camshaft mechanically coupled between the motor and the pair of levers, the camshaft comprising:
- a drive plate comprising a first substantially circular plate member, a center shaft member protruding from a center of the first circular plate member, wherein the first circular plate member defines two radial drive slots on opposing sides of the center shaft member;
- four arms movably coupled at respective endpoints and arranged in a polar configuration;
- four roller extensions coupled to respective end points of two pairs of the arms, wherein one pair of the roller extensions are arranged to fit into respective radial drive slots;
- and
- a scroll plate comprising a second substantially circular plate member, wherein
- the second substantially circular plate member defines a substantially circular center hole to fit around the center shaft member and two “S” shaped scroll slots on opposing sides of the center hole, and
- another pair of the roller extensions are arranged to fit into respective scroll slots.
9 more elements
A bag mask valve (BMV) based resuscitator comprising:
- an inflatable bag arranged to provide air to a patient through a face mask or an endotracheal tube in response to compression/retraction actions applied to the inflatable bag;
- a motor;
- a pair of levers positioned to surround a central portion of the inflatable bag and arranged to provide the compression/retraction actions to the inflatable bag in response to a rotational motion from the motor;
- and
- a camshaft mechanically coupled between the motor and the pair of levers, the camshaft comprising:
- a base washer;
- a drive block aligned centrally with the base washer;
- a first half drive camshaft comprising a first camshaft member and a first stud that protrudes transversally from the first camshaft member, wherein the first camshaft member defines a substantially centrally located first opening to fit around the drive block;
- a second half drive camshaft comprising a second camshaft member and a second stud that protrudes transversally from the second camshaft member, wherein the second camshaft member defines a substantially centrally located second opening to fit around the drive block and a third opening to fit around the first stud;
- a substantially circular scroll block that defines a substantially circular center hole to fit around a threaded top portion of the drive block and two “S” shaped scroll slots on opposing sides of the center hole;
- a fastening mechanism to secure the transversally ordered base washer, drive block, first half drive camshaft, second half drive camshaft, and scroll block together, wherein the fastening mechanism is arranged to thread to the threaded top portion of the drive block;
- and
- a cover plate to fit into a substantially circular opening at a top surface of the scroll block.
10 more elements
Dependencies are inferred from the claim text.