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US 2015/0283689 A1Published application
Seat puller
AssigneeSamuel Weaver
InventorSamuel Weaver
Life of this patent
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Abstract
A seat puller removes a valve seat or bushing from a structure such as a fluid pump. The seat puller may be formed of a shaft having a threaded adjusting nut fastening region, a central shaft region, a land region, a cone shaft region and an end stopper region. The seat puller includes a slide lock jaw held onto the shaft at the land region by a spring. The spring permits the slide lock jaw to open slightly and thereby permits the slide lock jaw to slide down the shaft to the cone shaft region. This causes the slide lock jaw to open and engage the internal and bottom surfaces of a seat with its outer circumference, thereby permitting the seat puller to remove the seat from the structure in which it is seated.
Claims20
An apparatus, comprising:
- a slide lock jaw including a first half jaw and a second half jaw, each of the first half jaw and the second half jaw having a first end and a second end opposite to the first end and having a first wall and a second wall each extending between the first end and the second end;
- wherein the slide lock jaw has a first, closed position whereby the first wall of the first half jaw faces and is in contact with the first wall of the second half jaw, and the second wall of the first half jaw faces and is in contact with the second wall of the second half jaw;
- wherein the slide lock jaw has a second, open position whereby the first wall of the first half jaw faces and is spaced further apart from the first wall of the second half jaw at the second end than the first end, and the second wall of the first half jaw faces and is spaced further apart from the first wall of the second half jaw at the second end than the first end;
- wherein at least one of:
- the first half jaw includes a pivot extending from at least one of the first wall or the second wall near the first end of the first half jaw for engagement with a notch within the corresponding at least one of the first wall or the second wall of the second half jaw;
- or
- the second half jaw includes a pivot extending from at least one of the first wall or the second wall near the first end of the second half jaw for engagement with a notch within the corresponding at least one of the first wall or the second wall of the first half jaw;
- wherein an interior surface of each of the first half jaw and the second half jaw is at least partially conical in shape such that an opening extends completely through the first end and the second end both when the slide lock jaw is in the first, closed position and when the slide lock jaw is in the second, open position.
5 more elements
An apparatus, comprising:
- a shaft having a circular outer circumference and including:
- a central shaft region;
- a land region extending from the central shaft region;
- a cone shaft region extending from the land region;
- and
- an end stopper region about a circumference of an end of the cone shaft region opposite from the land region;
- and
- a slide lock jaw including two half jaws, a pivot and a keeper spring, each half jaw having an interior surface shaped to match an external surface of the cone shaft region;
- wherein the slide lock jaw is slidingly held against the shaft for rotation about the pivot by engagement of the keeper spring with each of the two half jaws such that the slide lock jaw has a first, closed position in sliding engagement with the land region and a second, open position in sliding engagement with the cone shaft region and in contact with the end stopper region.
6 more elements
A method, comprising:
- inserting a slide lock jaw through a first end of an annular seal affixed to a housing wherein the slide lock jaw is mounted on a shaft having a circular outer circumference, the shaft includes a central shaft region, a land region extending from the central shaft region, a cone shaft region extending from the land region, and an end stopper region about a circumference of an end of the cone shaft region opposite from the land region, and the slide lock jaw includes two half jaws, a pivot and a keeper spring, each half jaw having an interior surface shaped to match an external surface of the cone shaft region and the slide lock jaw is slidingly held against the shaft for rotation about the pivot by engagement of the keeper spring with each of the two half jaws;
- extending the shaft toward the annular seal until the end stopper region extends from a second end of the annular seal while the slide lock jaw is in a first, closed position in sliding engagement with the land region;
- raising the shaft away from the annular seal until the slide lock jaw is in a second, open position in sliding engagement with the cone shaft region and in contact with the end stopper region, an outer circumference of the slide lock jaw in contact with the internal surface of the annular seal;
- and
- removing the shaft and the annular seal from the housing while the slide lock jaw is in the second, open position.
2 more elements
Dependencies are inferred from the claim text.