# US 11,077,540 B1 · Pack jack system

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- Number: US 11,077,540 B1
- Document ID: US11077540B1
- Status: Granted
- Kind: B1
- Application number: 16/520,976
- Filed: 2019-07-24
- Granted: 2021-08-03
- Earliest claimed: 2018-07-25
- Applicants: Jeremy Dewitt
- Inventors: Jeremy Dewitt
- Web page: https://patentgrep.com/patent/US11077540B1

## CPC

- B25B 27/0028: {Tools for removing or installing seals (B25B27/0092 takes precedence)}
- B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING

## Abstract

A shaft assembly has a central rod, a braided cable, and a coupling there between. The coupling receives the lower end of the central rod and the upper end of the braided cable. A fastener has an upper end with a cylindrical extension for coupling with the lower end of the braided cable. A handle has an upper region with a cylindrical extension and a lower region with a cylindrical flange with a left tab and a right tab. A slide hammer is configured to be vertically reciprocable along the shaft assembly. The slide hammer has an upper region with an upper cylindrical flange. The slide hammer has a lower region with a lower cylindrical flange with a lower extension.

## Claims

### Claim 1

A pack jack system comprising:
a shaft assembly having a central rod, a braided cable, and a coupling between the central rod and the braided cable, the central rod having an upper end and a lower end, the braided cable having an upper end and a lower end, the coupling receiving the lower end of the central rod and the upper end of the braided cable;
a fastener having an upper end and a lower end, the upper end of the fastener having a cylindrical extension for coupling with the lower end of the braided cable;
a handle having an upper region and a lower region, the upper region having a cylindrical extension, the lower region having a cylindrical flange with a left tab and a right tab; and
a slide hammer configured to be vertically reciprocable along the shaft assembly, the slide hammer having an upper region with an upper cylindrical flange, the slide hammer having a lower region with a lower cylindrical flange, the lower cylindrical flange having a lower extension.

### Claim 2 (depends on 1)

The system as set forth in claim 1 and further including:
a bullnose bushing having a frusto-conical shape, the bullnose bushing being located on the lower extension of the lower cylindrical flange of the slide hammer.

### Claim 3 (depends on 1)

The system as set forth in claim 1 and further including:
a safety cable (86) having an upper looped end (88) and a lower looped end (90), the lower looped end secured to the slide hammer, the upper looped end secured to the handle.

### Claim 4 (depends on 1)

The system as set forth in claim 1 wherein the fastener is a corkscrew (104).

### Claim 5 (depends on 1)

The system as set forth in claim 1 wherein the fastener is a bolt (106).

### Claim 6 (depends on 1)

The system as set forth in claim 1 wherein the fastener is a screw (108).

### Claim 7

A pack jack system (10) for removing gland packing and gasket seals from a variety of pipes, pumps, pump housings and other like systems, the system comprising, in combination:
a shaft assembly including a central rod (14), a braided cable (16), and a coupling (28);
the central rod (14) having a cylindrical configuration, the central rod having an upper end (16) and a lower end (18) and an intermediate region (200) there between;
the braided cable (22) having an upper end (24), a lower end (26), an intermediate region between the upper end of the braided cable and the lower end of the braided cable, and a cylindrical extension (35) below the lower end of the braided cable;
the coupling (28) having a cylindrical configuration with an upper opening (30) and a lower opening (32) connecting the central rod and the braided cable (22), the upper opening receiving the lower end of the central rod and the lower opening receiving the upper end of the braided cable;
a fastener in the form of a spiral corkscrew (34) having a helical shaped body, the spiral corkscrew having an upper end (36) and a lower end (38), the lower end of the spiral corkscrew having a sharp point (42);
a handle (44) having a body cavity with an upper region (46) and a lower region (48), the upper region having a cylindrical extension (50), the lower region having a cylindrical flange (52) and a lateral aperture (54), the lower region further having a left tab (56) and a similarly configured right tab (58), the left tab having a left tab aperture (60), the lateral aperture receiving a threaded bolt (62) for coupling the handle to the central rod;
a slide hammer (64) having a cannulated body positioned along the central rod and the braided cable, the slide hammer having an upper region of the slide hammer (66) and a lower region of the slide hammer (68), the upper region of the slide hammer having an upper cylindrical flange (70) and a lateral aperture (72), the lower region of the slide hammer having a lower cylindrical flange (74) and a lower cylindrical extension (76);
a bullnose bushing (78) positioned on the lower cylindrical extension of the slide hammer, the bullnose bushing having a frusto-conical shape, the bullnose bushing having an upper end (80) and a lower end (82), the lower end of the bullnose bushing having a tapered periphery (84), the bullnose bushing being fabricated of a rigid synthetic polymer chosen from the class of materials including nylon, ABS and other rigid synthetic polymers; and
a safety cable (86) having an upper looped end (88) and a lower looped end (90) and an intermediate region (92) there between, the intermediate region of the safety cable having a length, the lower looped end having a metallic pin (94) which is received by the lateral aperture of the upper cylindrical flange, the upper looped end being connected to the left tab aperture.

### Claim 8 (depends on 7)

The system (100) as set forth in claim 7 wherein the fastener is removable and replaceable and has a shank (112) removably received in a recess (116) formed in the cylindrical extension (35) of the braided cable, a flat (114) formed on the shank, a threaded recess (118) in the cylindrical extension, and a set screw (120) within the threaded recess engaging with the flat to preclude unintended rotation.