Sliding power lift and locking system

• US 8,677,689 B1
• Filed: 01/07/2013
• Issued: 03/25/2014
• Est. Priority Date: 01/06/2012
• Status: Active Grant

• Current Assignee: Dts Enterprises Inc.
• Original Assignee: Dts Enterprises Inc.
• Inventors: Draper, David L., Attee, Keith S., Buerkle, Thomas H. Jr.
• Primary Examiner(s): REDMAN, JERRY E
• Application Number:
  US13/735,533
• Time in Patent Office: 442 Days
• Field of Search: 492/79, 492/80, 492/81, 493/00, 493/39, 493/40, 493/41, 493/44, 493/46, 492/82, 492/83, 492/84, 492/85, 492/91, 492/92, 492/93, 492/94, 492/95, 492/96, 492/98, 492/99, 493/94, 522/00
• US Class Current: 49/281
• CPC Class Codes: E05F 15/63 operated by swinging arms
• CPC Class Codes: E05Y 2201/218 Holders
• CPC Class Codes: E05Y 2201/70 Nuts
• CPC Class Codes: E05Y 2900/152 Roof windows
• CPC Class Codes: E05Y 2900/514 for ships

Abstract

A sliding power lift and locking assembly for lifting and locking an object includes a motor, a first drive shaft, a first drive block assembly, a first drive housing, and a link arm. The first drive shaft has a body and a cylindrical axis and is rotationally driven by the motor. The first drive block assembly includes an aperture configured to engage the body of the first drive shaft, a latch dog with a first slot configured to engage a dog catch pin associated with the object, and a slider. A portion of the first drive housing and a portion of the first drive block assembly are provided in a track of the first drive housing, and the track of the first drive housing is configured such that the first drive block assembly is configured to move in a path relative to the first drive housing. The link arm includes a first end and second end. The first end of the link arm is configured to move with the slider of the first drive block assembly, and the second end of the link arm is configured to connect to the object.

Claims

1. A sliding power lift and locking assembly for lifting and locking an object, the assembly comprising:

a motor;

a first drive shaft, wherein the first drive shaft has a body and a cylindrical axis and the first drive shaft is rotationally driven by the motor;

a first drive block assembly, wherein the first drive block assembly includes an aperture configured to engage the body of the first drive shaft, a latch dog with a first slot configured to engage a dog catch pin associated with said object, and a slider;

a first drive housing, wherein a portion of the first drive shaft and a portion of the first drive block assembly are provided in a track of the first drive housing, and wherein the track of the first drive housing is configured such that the first drive block assembly is configured to move in a path relative to the first drive housing; and

a link arm including a first end and a second end,

wherein the first end of the link arm is configured to move with the slider of the first drive block assembly, and the second end of the link arm is configured to connect to said object.

2. The assembly of claim 1, wherein the first drive block assembly comprises a slider latch connected to the slider and configured to engage with the latch dog.

3. The assembly of claim 2, wherein the latch dog includes a second slot configured to engage with a first end of the slider latch, and wherein a second end of the slider latch is configured to connect with the slider.

4. The assembly of claim 3, wherein the second slot of the latch dog is L-shaped and a bottom portion of the second slot is configured to receive a portion of the first end of the slider latch.

5. The assembly of claim 4, comprising a slider latch spring configured to bias the slider latch toward the bottom portion of the second slot.

6. The assembly of claim 4, wherein the first drive housing comprises a trip wedge configured to move the first end of the slider latch out of the bottom portion of the second slot.

7. The assembly of claim 2, wherein the latch dog is configured to move independently of the slider latch when the latch dog and the slider latch are disengaged and wherein the slider latch is configured to move with the latch dog when the slider latch and the latch dog are engaged.

8. The assembly of claim 2, wherein the slider latch includes a slot and the latch dog includes a pin configured to engage with the slot of the slider latch.

9. The assembly of claim 1, wherein the first drive housing comprises a trip wedge configured to disengage the slider latch from the latch dog.

10. The assembly of claim 1, comprising a limit switch configured to stop the motor.

11. The assembly of claim 1, wherein the first slot of the latch dog has a medial axis at an angle relative to the cylindrical axis of the first drive shaft.

12. The assembly of claim 1, wherein the first slot of the latch dog includes a first portion with a first medial axis at a first angle relative to the cylindrical axis of the first drive shaft and a second portion with a second medial axis at a second angle relative to the cylindrical axis of the first drive shaft, and wherein the first angle and second angle are different.

13. The assembly of claim 1, wherein the latch dog is connected to the aperture of the first drive block assembly such that the latch dog is configured to move with the aperture in a path along the first drive shaft.

14. The assembly of claim 1, wherein the first end of the link arm is pivotally connected to the slider and the second of the link arm is pivotally connected to said object.

15. The assembly of claim 1, comprising a second drive shaft, a second drive block assembly, a second drive housing, and a drive synchronizer configured to facilitate the motor to drive the first drive block assembly and the second drive block assembly.

16. The assembly of claim 15, wherein the drive synchronizer comprises a first drive belt pulley connected to the first drive shaft, a second drive belt pulley connected to the second drive shaft, and a drive belt disposed between the first drive shaft and second drive shaft.

17. The assembly of claim 16, comprising a belt tensioner.

18. The assembly of claim 15, wherein the drive synchronizer comprises a first bevel gear connected to the first drive shaft, a second bevel gear connected to the second drive shaft, a corresponding first bevel gear, a corresponding second bevel gear, and a drive synchronizer shaft disposed between the first drive shaft and second drive shaft and connected to the corresponding first bevel gear and corresponding second bevel gear.

19. The assembly of claim 1, wherein a cross-section of the portion of the first drive block assembly provided in the track of the first drive housing has substantially the same peripheral shape as a cross-section of the track of first drive housing.

20. The assembly of claim 1, wherein the first drive shaft is threaded, and the aperture of the first drive block assembly is threaded, and wherein the rotation of the first drive shaft causes the latch dog to move along the track of the first drive housing.