Counterbalance system and/or a method for counterbalancing a load

Patent metadata

Field	Value
Publication number	US-10400944-B2
Application number	US-201515562976-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	Mar 31, 2015
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

Disclosed is a counterbalance system for moving a payload and a method for counterbalancing the payload. The system and method comprise a resilient member that is in communication with the payload to be moved and two resilient members that are in communication with either end of the first resilient member. An actuator is in communication with the first and third resilient members and a payload arm, attached to the payload, is in communication with the first and second resilient members. The resilient members may be compressed and relaxed during movement of the actuator and the payload arm so that energy may be transferred between the system and the payload to counterbalance the weight of the payload.

First claim

The embodiments for which an exclusive privilege or property is claimed are as follows:

1. A counterbalance system for engaging a payload having a load vector in the direction of gravity, the system comprising:
a payload (K 1 ) member in communication with the payload to be engaged;
a payload compensation (K 2 ) member and an actuator compensation (K 3 ) member in communication with either end of the payload (K 1 ) member;
an actuator, having a loaded and an unloaded position, in communication with the payload (K 1 ) and the actuator compensation (K 3 ) members, the payload (K 1 ) and the actuator compensation (K 3 ) members adapted to transfer an actuator energy during movement, of the actuator between the loaded and unloaded positions;
a payload arm adapted to support the payload, having a load-bearing and a neutral position, in communication with the payload (K 1 ) and the payload compensation (K 2 ) members, the payload (K 1 ) and the payload compensation (K 2 ) members adapted to transfer a support energy during movement of the payload arm between the load-bearing and neutral positions; and
whereby, movement of the actuator to the loaded position when the payload arm is in the neutral position, transfers the actuator energy and the support energy to generate a lift vector at the payload to counterbalance the load vector.

2. The counterbalance system, according to claim 1 , wherein the payload arm rotates about a first pivot and the actuator arm rotates about a second pivot.

3. The counterbalance system, according to claim 1 , wherein the payload (K 1 ) member, the payload compensation (K 2 ) member and the actuator compensation (K 3 ) member are adapted to exert an expansion force.

4. The counterbalance system, according to claim 1 , wherein the payload (K 1 ) member, the payload compensation (k 2 ) member and the actuator compensation (K 3 ) member are compression springs.

5. The counterbalance system, according to claim 2 , further comprising first and second cams adapted to transfer the support energy between the payload (K 1 ) member and the payload compensation (K 2 ) member and third and fourth cams to transfer the actuator energy between the payload (K 1 ) member and the actuator compensation (K 3 ) member.

6. The counterbalance system, according to claim 5 , wherein the first and second cams are mounted eccentrically in relation to the first pivot and the third and fourth cams are mounted eccentrically in relation to the second pivot.

7. The counterbalance system, according to claim 1 , wherein the payload (K 1 ) member, the payload compensation (K 2 ) member and the actuator compensation (K 3 ) member are adapted to exert a compression force.

8. The counterbalance system, according to claim 7 , wherein the payload (K 1 ) member, the payload compensation (K 2 ) member and the actuator compensation (K 3 ) member are extension springs.

9. The counterbalance system, according to claim 7 , wherein the payload (K 1 ) member and the payload compensation (K 2 ) member are attached eccentrically in relation to one another to facilitate transfer of the support energy and the payload (K 1 ) member and the actuator compensation (K 3 ) member are attached eccentrically in relation to one another to facilitate transfer of the actuator energy.

10. The counterbalance system, according to claim 1 , further comprising a brake adapted to maintain the actuator at a position.

11. The counterbalance system, according to claim 10 , wherein the position corresponds with the load vector.

12. A method of engaging a payload having a load vector in the direction of gravity using a counterbalance system, the method comprising:
positioning a payload (K 1 ) member in communication with the payload to be engaged;
positioning a payload compensation (K 2 ) and an actuator compensation (K 3 ) member in communication with either end of the payload (K 1 ) member;
configuring an actuator, moveable between a loaded and an unloaded position, for communication with the payload (K 1 ) and the actuator compensation (K 3 ) members to transfer an actuator energy during movement of the actuator between the loaded and unloaded positions;
configuring a payload arm adapted to support the payload, moveable between a load- bearing and a neutral position, for communication with the payload (K 1 ) and the actuator compensation (K 2 ) members to transfer a support energy during movement of the payload arm between the load-bearing and neutral positions; and
whereby, moving the actuator to the loaded position when the payload arm is in the neutral position, transfers the actuator energy and the support energy to generate a lift vector at the payload to counterbalance the load vector.

13. The method of claim 12 , whereby the payload arm rotates about a first pivot and the actuator arm rotates about a second pivot.

14. The method of claim 12 , whereby the payload (K 1 ) member, the payload compensation (K 2 ) member and the actuator compensation (K 3 ) member are adapted to exert an expansion force.

15. The method of claim 2 , further comprising first and second cams adapted to transfer the support energy between the payload (K 1 ) member and the payload compensation (K 2 ) member and third and fourth cams to transfer the actuator energy between the payload (k 1 ) member and the actuator compensation (K 3 ) member.

16. The method of claim 15 , whereby the first and second cams are mounted eccentrically in relation to the first pivot and the third and fourth cams are mounted eccentrically in relation to the second pivot.

17. The method of claim 12 , whereby the payload (K 1 ) member, the payload compensation (K 2 ) member and the actuator compensation (K 3 ) member are adapted to exert a compression force.

18. The method of claim 17 , whereby the payload (K 1 ) member and the payload compensation (K 2 ) member are attached eccentrically in relation to one another to facilitate transfer of the support energy and the payload (K 1 ) member and the actuator compensation (K 3 ) member are attached eccentrically in relation to one another to facilitate transfer of the actuator energy.

19. The method of claim 12 , further comprising the step of maintaining the actuator at a position using a brake.

20. The method of claim 19 , whereby the position of the brake corresponds to the load vector.

Assignees

• Centre For Imaging Tech Commercialization
• Univ Western Ontario

Inventors

• Bax Jeffrey
• Waring Christopher
• Fenster Aaron

Classifications

• F16M2200/063

  Parallelogram arms · CPC title

• F16M11/12

  in more than one direction · CPC title

• F16M2200/041

  for balancing rotational movement of the head · CPC title

• F16M11/046

  adapted to upward-downward translation movement · CPC title

• F16M13/005 Primary

  integral with the apparatus or articles to be supported · CPC title