Coordinated lift system with user selectable RF channels

• US 20050045429A1
• Filed: 07/29/2004
• Published: 03/03/2005
• Est. Priority Date: 08/01/2003
• Status: Active Grant

• Current Assignee: Gray Manufacturing Company Incorporated
• Original Assignee: Gray Manufacturing Company Incorporated
• Inventors: Baker, William J.
• Granted Patent: US 7,219,770 B2
• Time in Patent Office: Days
• US Class Current: 187/277
• CPC Class Codes: B66F 3/46 Combinations of several jacks with means for interrelating lifting or lowering movements

Abstract

A coordinated lift system with user selectable RF channels coordinates the raising and lowering of a vehicle relative to a surface by using wireless communications. The lift system includes at least two lift mechanisms each having support frame, including a post, a carriage, an actuating device, and a control device with a channel selector switch. The carriage is slidably mounted on the post and is configured to support a portion of the vehicle. The actuating device is engaged between the support frame and the carriage and is activated to move the carriage relative to the post. The control device is interfaced with the actuating device and includes an RF transceiver to enable communication by RF signals with the other control device. The channel on which the transceiver operates is user selectable in the field. A rechargeable battery may provide power to the control device to allow for increased mobility of the lift system.

Claims

1. A wireless lift system for coordinated lifting of a structure and comprising:

(a) a first lift mechanism and a second lift mechanism;

(b) each of said first and second lift mechanisms including a support frame including a vertical guide member, a carriage slidingly engaged with said guide member and adapted to supportively engage a structure to lift and/or lower the structure, an actuator engaged between said support frame and said carriage, and a controller coupled to said actuator and programmed to enable selective activation of said actuator to thereby lift and/or lower said structure;

(c) each lift mechanism including a radio-frequency (RF) transceiver coupled to the controller associated therewith to enable wireless communication between controllers of said lift mechanisms;

(d) the controller of each lift mechanism being programmed to enable cooperation of said lift mechanisms by way of the RF transceivers thereof to enable coordinated lifting and/or lowering of said structure;

(e) each RF transceiver including circuitry to enable operation on any of a plurality or RF channels; and

(f) each RF transceiver having a channel selector switch coupled thereto and operable to enable field selection of one of said RF channels.

2. A system as set forth in claim 1 wherein each lift mechanism includes:

(a) a rechargeable battery coupled to said actuator by way of said controller to thereby selectively provide operating power thereto.

3. A system as set forth in claim 1 wherein each lift mechanism includes:

(a) said actuator including a hydraulic cylinder and a hydraulic pump communicating hydraulic fluid to said cylinder under pressure; and

(b) a rechargeable battery coupled to said hydraulic pump by way of said controller to thereby selectively provide operating power to said hydraulic pump.

4. A system as set forth in claim 1 wherein:

(a) said carriage is adapted to engage a tire of a vehicle to thereby lift said vehicle.

5. A system as set forth in claim 1 and including:

(a) an additional lift mechanism substantially similar to said first and second lift mechanisms and capable of operation in coordination therewith.

6. A system as set forth in claim 1 wherein:

(a) said controller is programmed to prevent operation of either of said lift mechanisms unless both are set to the same RF channel.

7. A system as set forth in claim 1 wherein said selector switch includes:

(a) a plurality of two-state switches coupled to said controller and capable of being set in combinations representing binary numbers;

(b) said controller being programmed to associate each possible binary number with a particular RF channel; and

(c) said controller being programmed to read a binary number corresponding to a pattern in which said two-state switches are set and to select an RF channel associated said binary number.

8. A system as set forth in claim 1 wherein each lift mechanism includes:

(a) a height sensor engaged between said support frame and said carriage and communicating to said controller a height signal corresponding a location of said carriage relative to said support frame to thereby enable said coordinated lifting and/or lowering of said structure.

9. A wireless lift system for coordinated lifting of a structure and comprising:

(a) a plurality of lift mechanisms, each lift mechanism being manually movable and including a support frame including a vertical guide member and a carriage slidingly engaged with said guide member and adapted to supportively engage a structure to lift and/or lower the structure;

(b) each lift mechanism including a hydraulic cylinder engaged between said support frame and said carriage, a hydraulic pump communicating hydraulic fluid with said hydraulic cylinder, and a rechargeable battery coupled to said hydraulic pump and selectively providing operating power therefor;

(c) each lift mechanism including a controller coupling said battery to said hydraulic pump and programmed to enable selective activation of said hydraulic pump to thereby cause lifting and/or lowering of said structure;

(d) each lift mechanism including a height sensor engaged between said support frame and said carriage and communicating to said controller a height signal corresponding a location of said carriage relative to said support frame;

(e) each lift mechanism including a radio-frequency (RF) transceiver coupled to the controller associated therewith to enable wireless communication between controllers of said lift mechanisms;

(f) the controller of each lift mechanism being programmed to enable cooperation of said lift mechanisms by way of the RF transceivers thereof to enable coordinated lifting and/or lowering of said structure;

(g) each RF transceiver including circuitry to enable operation on any of a plurality or RF channels; and

(h) each RF transceiver having a channel selector switch coupled thereto and operable to enable field selection of one of said RF channels.

10. A system as set forth in claim 9 wherein:

(a) said carriage is adapted to engage a tire of a vehicle to thereby lift said vehicle.

11. A system as set forth in claim 9 wherein:

(a) said controller is programmed to prevent operation of any of said lift mechanisms unless all transceivers thereof are set to a same RF channel.

12. A system as set forth in claim 9 wherein said selector switch includes:

(a) a plurality of two-state switches coupled to said controller and capable of being set in combinations representing binary numbers;

(b) said controller being programmed to associate each possible binary number with a particular RF channel; and

(c) said controller being programmed to read a binary number corresponding to a pattern in which said two-state switches are set and to select an RF channel associated said binary number.

13. A wireless lift system for coordinated lifting of a vehicle and comprising:

(a) a plurality of lift mechanisms, each lift mechanism including a support frame including a vertical guide member and a carriage slidingly engaged with said guide member and adapted to supportively engage a tire of a vehicle to lift and/or lower the vehicle;

(b) each lift mechanism including a hydraulic cylinder engaged between said support frame and said carriage, a hydraulic pump communicating hydraulic fluid with said hydraulic cylinder, and a rechargeable battery coupled to said hydraulic pump and selectively providing operating power therefor;

(c) each lift mechanism including a controller coupling said battery to said hydraulic pump and programmed to enable selective activation of said hydraulic pump to thereby cause lifting and/or lowering of said structure;

(d) each lift mechanism including a height sensor engaged between said support frame and said carriage and communicating to said controller a height signal corresponding a location of said carriage relative to said support frame;

(e) each lift mechanism including a radio-frequency (RF) transceiver coupled to the controller associated therewith to enable wireless communication between controllers of said lift mechanisms;

(f) the controller of each lift mechanism being programmed to enable cooperation of said lift mechanisms by way of the RF transceivers thereof to enable coordinated lifting and/or lowering of said vehicle;

(g) each RF transceiver including circuitry to enable operation on any of a plurality or RF channels, said controller being programmed to prevent operation of any of said lift mechanisms unless all transceivers thereof are set to a same RF channel; and

(h) each RF transceiver having a channel selector switch coupled thereto and operable to enable selection of one of said RF channels.

14. A system as set forth in claim 13 wherein said selector switch includes:

(a) a plurality of two-state switches coupled to said controller and capable of being set in combinations representing binary numbers;

(b) said controller being programmed to associate each possible binary number with a particular RF channel; and

(c) said controller being programmed to read a binary number corresponding to a pattern in which said two-state switches are set and to select an RF channel associated said binary number.

15. A lift system as set forth in claim 13 wherein each lift mechanism includes:

(a) a plurality of wheels mounted on said support frame and a handle connected to said support frame to enable selective manual movement of said lift mechanism.