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US 2014/0230529 A1Published application
Portable brinell hardness tester
AssigneeKing Tester Corporation
InventorErnest L. Biddle
Life of this patent
Estimating the term…
Abstract
A portable Brinell metal hardness tester has a test head mounted in a carriage, movable vertically along elevating screws, and includes an adjustable valve for relieving hydraulic pressure within the test head where the valve includes a stem, an interior member, and an intermediate member.
Claims20
A portable Brinell metal hardness tester comprising:
- (a) a carriage movable vertically along elevating screws;
- (b) a test head, mounted in the carriage, for applying preselected force to a test piece including:
- i) a reciprocable pumping plunger for supplying hydraulic fluid pressure to a ball contacting the test piece, the pumping plunger having a rack formed therein;
- ii) a rotatable gear engaging the rack, for imparting longitudinal motion to the plunger upon rotation of the gear;
- iii) a pressure release valve for releasing hydraulic fluid pressure when desired, comprising:
- (1) a handle, extending outwardly from the test head for opening and closing the release valve, comprising:
- (A) a ring-like portion receivingly gripping a shaft portion of the pressure release valve;
- (B) an intermediate portion connected to the ring-like portion;
- (C) a blade portion, connected to the intermediate portion, of upstanding planar configuration.
- (c) a manually movable lever connected to the gear and being rotatable therewith, pivotally mounted on the test head exterior, for imparting rotary movement about the axis of rotation of the gear;
- and
- (d) a stop, connected to the carriage and positioned to contact the lever at a predetermined position of lever angular movement, for limiting lever angular travel and thereby limiting angular movement of the gear to a preselected amount.
9 more elements
A portable Brinell metal hardness tester comprising:
- (a) a carriage movable vertically along elevating screws;
- (b) a test head, mounted in the carriage, for applying preselected force to a test piece, including:
- i) a reciprocable pumping plunger for supplying hydraulic fluid pressure to a ball contacting the test piece, the pumping plunger having a rack formed therein;
- ii) a rotatable gear engaging the rack, for imparting longitudinal motion to the plunger upon rotation of the gear;
- iii) a pressure relief valve comprising:
- (1) a stem having first and second ends, the first end fitting against the ball as the ball contacts the valve seat, the stem residing within the passageway;
- (2) a spring interposed between and contacting the first and second ends of the stem;
- (3) an interior member having a first end contacting the second end of the stem and a second end adapted to receive a wrench, the interior member first end having external threads for engagement with the threaded passageway, rotation of the interior member moving the interior member axially within the passageway to compress or decompress the spring between the stem first and second ends according to direction of interior member movement thereby to increase or decrease force on the ball applied thereto by the stem first end.
- (c) a manually movable lever connected to the gear and being rotatable therewith, pivotally mounted on the test head exterior, for imparting rotary movement about the axis of rotation of the gear;
- and
- (d) a stop, connected to the carriage and positioned to contact the lever at a predetermined position of lever angular movement, for limiting lever angular travel and thereby limiting angular movement of the gear to a preselected amount.
8 more elements
A portable Brinell metal hardness tester comprising:
- (a) a carriage movable vertically along elevating screws;
- (b) a test head, mounted in the carriage, for applying preselected force to a test piece, the test head comprising:
- i) a pressure release valve for releasing hydraulic fluid pressure when desired, comprising:
- (1) a handle extending outward from the test head for opening and closing the release valve, comprising:
- (A) a ring-like portion receivingly gripping a shaft portion of the pressure release valve;
- (B) an intermediate portion connected to the ring-like portion;
- (C) a blade portion connected to the intermediate portion, of upstanding planar configuration;
- and
- ii) a pressure relief valve comprising:
- (1) a stem having first and second ends;
- (2) a spring interposed between and contacting the first and second ends of the stem;
- (3) an interior member having a first end contacting the second end of the stem and a second end adapted to receive a wrench, the interior member first end having external threads for engagement with a threaded passageway within which the interior member resides, rotation of the interior member moving the interior member axially within the passageway to compress or decompress the spring between the stem first and second ends according to direction of interior member movement thereby to increase or decrease force on a ball applied thereto by the stem first end.
9 more elements
Dependencies are inferred from the claim text.