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US 3,979,960 AGranted
Compression tester
AssigneeRite Autotronics Corporation
InventorEdwin L. Schwartz
Life of this patent
Estimating the term…
Abstract
A compression tester having a rotatably mounted dial disc cooperating with a stationary index line and a piston responsive to compression pressure movable against a spring for rotating the dial disc and a support plate for the dial disc providing for confined movement of the dial disc and low friction resistance to movement.
Claims9
A compression tester for measuring the compression pressure in a cylinder comprising:
- a casing containing a cylinder connected by a passage to the pressure to be measured;
- a piston in said cylinder movable against a spring in response to pressure in said passage;
- a piston rod rigidly connected to said piston and a rack gear rigidly connected to said piston rod;
- guide means rigid with said casing;
- means rigid with said piston rod and guided by said guide means for guiding the movement of said rack gear;
- a rotatably supported dial means having an axial projection comprising a pinion gear in mesh with said rack gear;
- and
- a stationary index means carried by said casing for coaction with said dial means to measure pressure.
5 more elements
A compression tester for measuring the compression pressure in a cylinder comprising;
- a casing containing a cylinder connected by a passage to the pressure to be measured;
- a piston in said cylinder movable against a spring in response to pressure in said passage;
- a piston rod connected to said piston and having a first plate rigidly connected to the end of said piston rod for movement therewith;
- a rack gear rigidly carried by said first plate and movable with said piston rod;
- a dial support plate attached rigidly to said casing and having a central opening therein;
- a dial plate having a central projection extending through and rotatably mounted in said central opening said projection having a pinion gear thereon in mesh with said rack gear;
- a dial disc secured to the face of said disc plate and having pressure indicating indicia thereon;
- and
- a cover for said dial disc secured to said casing and having a stationary index line for cooperating with said indicia to obtain a pressure measurement.
6 more elements
Dependencies are inferred from the claim text.